Battery pack and application of the battery pack

Abstract

The present invention relates to a battery pack, comprising a first housing element and a second housing element, which are jointly constructed to accommodate an internal space for a battery module, wherein a plurality of battery cells of the battery module are arranged in the internal space and are electrically conductively connected in series and / or in parallel with each other, and wherein at least one electrical component and / or at least one electronic component of the battery module is also accommodated in the internal space, wherein the first housing element constructs a first temperature control structure on a side facing away from the internal space and in particular the second housing element, wherein the second housing element is connected to a third housing element on a side facing away from the internal space and in particular the first housing element while constructing a second temperature control space through which a temperature control fluid can flow, wherein the third housing element accommodates a voltage converter, in particular a DC voltage converter.

Description

Technical Field

[0001] The starting point of the present invention is a battery pack. The subject matter of the present invention is also the use of such a battery pack. Background Art

[0002] It is known from the prior art that a battery module has a plurality of individual battery cells, each of which has a positive voltage tap and a negative voltage tap, wherein in order to connect a plurality of battery cells in an electrically conductive manner in series and / or in parallel, the corresponding voltage taps are electrically conductively connected to one another and are thus connected to one another to form a battery module. Battery modules are in turn connected to one another to form a battery pack or battery system. Due to the plurality of possible different vehicle installation spaces, a variable module size should be sought in order to be able to optimally utilize the existing installation space.

[0003] Furthermore, the battery cells of a battery module, such as lithium-ion battery cells or lithium-polymer battery cells, are heated during operation as a result of chemical conversion processes and due to the electrical resistance of these battery cells during power delivery or power consumption. These processes are particularly pronounced in the case of relatively fast energy delivery or energy consumption. The greater the operating capacity of the battery pack or battery module, the more pronounced the resulting heating and the resulting requirements for efficient temperature control systems. In order to increase the safety of the battery module and also to ensure the operating capacity of the battery cells, the battery cells of the battery module should be heated and cooled so that they can be operated within a certain temperature range as far as possible, so that, for example, increased aging characteristics or chemical damage to the battery can be prevented.

[0004] However, it is primarily these battery cells that should be cooled.

[0005] For example, the temperature control, i.e. heating or heat removal, of the battery pack can be formed by liquid temperature control using a water / ethylene glycol mixture. Here, the mixture is conducted via a cooling plate arranged below the battery pack module. Here, the cooling plate can be connected to corresponding components of the cooling circuit. Summary of the invention

[0006] A battery pack having the features of the independent claim offers the advantage that the temperature control of the individual components of the battery pack can be adapted to the respective requirements of these components. In particular, by forming two temperature control spaces, the temperature control requirements of a plurality of battery cells and components of the power electronics can be adapted and optimized separately from one another.

[0007] To this end, according to the present invention, a battery pack is provided. The battery pack includes a first housing element and a second housing element. The first housing element and the second housing element are jointly configured to accommodate an internal space of a battery module. Here, a plurality of battery cells of the battery module are arranged in the internal space. The plurality of battery cells are electrically conductively connected in series and / or in parallel with each other. A first element of a battery control device is also accommodated in the internal space.

[0008] The first housing element forms a first temperature control structure on a side facing away from the interior space. In particular, the first temperature control structure is also formed on a side facing away from the second housing element.

[0009] The second housing element is connected to the third housing element on the side facing away from the interior space. Here, the second housing element and the third housing element jointly form a second temperature control space through which a temperature control fluid can flow. In particular, the second housing element is connected to the third housing element on the side facing away from the first housing element.

[0010] In this case, the third housing element accommodates the second element of the battery pack control unit.

[0011] Advantageous embodiments and improvements of the device specified in the independent claim are possible by means of the measures mentioned in the dependent claims.

[0012] The embodiment of the battery according to the invention offers the advantage, in particular, that the components conducting the temperature control fluid are arranged outside the interior space, so that in the event of a leak no temperature control fluid can reach the battery cells, thereby increasing safety. Efficient cooling of the individual components is also possible, since relatively short thermal paths are formed.

[0013] Advantageously, the first element of the battery control device comprises at least one electrical component and / or at least one electronic component (9) of the battery module and the second element of the battery control device is a voltage converter, in particular a DC voltage converter.

[0014] It is also advantageous if the second element of the battery control unit comprises at least one electrical component and / or at least one electronic component of the battery module and if the second element of the battery control unit is a voltage converter, in particular a DC voltage converter.

[0015] It is expedient that the first housing element, the second housing element and / or the third housing element are each designed as a die-cast housing. This makes it possible to provide a mechanically relatively stable design. It is also possible that the area for conducting the temperature control fluid can be designed within the die-cast component or by connecting two die-cast components to each other, so that additional cooling plates, heating elements or temperature control systems can be omitted.

[0016] It is advantageous if the first housing element and the second housing element are connected to one another in a fluid-tight manner. In particular, a first sealing element is arranged between the first housing element and the second housing element. Thus, a fluid-tightly enclosed interior of the battery can be provided. In particular, battery cells, electrical components and / or electronic components can thereby be protected from external influences.

[0017] According to a preferred aspect of the present invention, the plurality of battery cells are configured as prismatic battery cells. In this case, the prismatic battery cells have a total of six side surfaces, which are arranged in pairs opposite to each other and parallel to each other. Furthermore, the side surfaces arranged adjacent to each other are arranged at right angles to each other. Overall, it is possible to provide a compact battery pack by using prismatic battery cells in the battery pack according to the present invention.

[0018] Preferably, the electrical components of the battery module are cell connectors and / or conductors. The cell connectors are designed to connect the voltage taps of the battery cells in an electrically conductive manner in series and / or in parallel with one another. The conductors are designed to conduct current from one component to another.

[0019] Preferably, the electronic components of the battery module are switches, fuses, battery control systems and / or resistors.

[0020] By arranging electrical and / or electronic components within the interior of the battery, it is possible to electrically conductively connect a plurality of battery cells of a battery module in series and / or in parallel with one another and to control and regulate the battery module.

[0021] According to a preferred aspect of the present invention, at least one electronic component is integrated into the printed circuit board. This offers the advantage of a relatively compact design which can also be easily temperature-controlled.

[0022] It is suitable to arrange a cover element on the first housing element. Here, the cover element and the first temperature control structure together form a first temperature control space through which a temperature control fluid can flow. Here, the temperature control structure can be closely and heat-conductingly flowed around by the temperature control fluid that can flow through the first temperature control space.

[0023] This offers the advantage that the first temperature control structure can be adapted to the requirements regarding the temperature control of the plurality of battery cells accommodated in the interior space. In this case, the adaptation can be adjusted independently of the cooling of the electrical and / or electronic components and independently of the cooling of the voltage converter. For example, the first temperature control structure can include spoiler elements or flow guide elements, which are arranged only at positions where they can positively influence the temperature control based on the required temperature of the plurality of battery cells. In addition, the remaining area of ​​the first temperature control space can be optimized with regard to flow and pressure losses. In particular, a compromise between the temperature control of the plurality of battery cells and the electrical and / or electronic components and the voltage converter can be avoided, since independent temperature control of these components is possible.

[0024] Preferably, the cover element is connected to the first housing element in a materially bonded manner. The cover element can be connected to the first housing element in particular by welding or soldering. A second sealing element can also be arranged between the first housing element and the cover element.

[0025] Preferably, it is also possible for the cover element to be formed by the first housing element.

[0026] Overall, this offers the advantage that, by means of this configuration, it is possible to prevent the temperature-control fluid from being able to enter the interior space and reach the plurality of battery cells in the event of a fault or a leak in the first temperature-control space.

[0027] Advantageously, the battery module comprises a first connection and a second connection. The first connection is designed to supply a temperature control fluid to the battery, while the second connection is designed to discharge the temperature control fluid from the battery.

[0028] The first connection and the second connection form, in particular, an interface to a motor vehicle.

[0029] According to a first aspect, the temperature-control fluid can flow in series through the first temperature-control fluid receptacle and the second temperature-control fluid receptacle. In this case, for example, the temperature-control fluid first flows through the first temperature-control fluid receptacle and then flows through the second temperature-control fluid receptacle.

[0030] According to a second aspect of the present invention, the temperature control fluid can flow through the first temperature control fluid receiving part and the second temperature control fluid receiving part in parallel. Here, after flowing through the first connection end, the temperature control fluid is divided into a first sub-flow and a second sub-flow, the first sub-flow flowing through the first temperature control fluid receiving part, and the second sub-flow flowing through the second temperature control fluid receiving part. After flowing through the corresponding temperature control space, the first sub-flow and the second sub-flow are reunited and led out of the battery pack by means of the second connection end. By this, for example, the pressure loss can be reduced to a minimum.

[0031] In particular, in this case, the first housing element and the second housing element and / or the third housing element respectively have a temperature control fluid inlet and a temperature control fluid outlet. The corresponding temperature control fluid inlet is used to allow the temperature control fluid to flow into the first flow space or the second flow space, and the corresponding temperature control fluid outlet is used to allow the temperature control fluid to flow out of the first flow space or the second flow space. In addition, the temperature control fluid outlet and the temperature control fluid inlet can be connected to each other in a fluid-conducting manner, so that the temperature control fluid can flow between the first flow space and the second flow space or vice versa between the second flow space and the first flow space.

[0032] For example, the temperature control fluid inlet of the second housing element and / or the third housing element can constitute the first connection end of the battery pack, so that the temperature control fluid can flow into the second flow space through it. In addition, the temperature control fluid outlet of the second housing element and / or the third housing element can be connected to the temperature control fluid inlet of the first housing element, for example, in a fluid-conducting manner, so that the temperature control fluid can first flow through the second flow space and then flow through the first flow space, that is, a serial flow is constructed. In addition, the temperature control fluid outlet of the first housing element can, for example, constitute the second connection end of the battery pack, so that the temperature control fluid can leave the first flow space through it.

[0033] For example, the temperature control fluid inlet of the first housing element can constitute the first connection end of the battery pack, so that the temperature control fluid can flow into the first flow space through it. In addition, the temperature control fluid outlet of the first housing element can be connected to the temperature control fluid inlet of the second housing element and / or the third housing element, for example, in a fluid-conducting manner, so that the temperature control fluid can first flow through the first flow space and then flow through the second flow space, that is, a serial flow is constructed. In addition, the temperature control fluid outlet of the second housing element and / or the third housing element can, for example, constitute the second connection end of the battery pack, so that the temperature control fluid can leave the second flow space through it.

[0034] It is suitable that the second housing element constructs a second temperature control structure and / or the third housing element constructs a third temperature control structure. It is thus possible to adapt the second temperature control structure and / or the third temperature control structure to the requirements regarding cooling of electrical components and / or electronic components and voltage converters. In particular, the adaptation can be achieved independently of the requirements for battery cooling. The second temperature control structure and / or the third temperature control structure can be configured, for example, as a flow guide element or a spoiler element, wherein the second temperature control structure and / or the third temperature control structure are arranged at such a location that requires relatively intensive temperature control. The remaining area of ​​the second temperature control space can be optimized with respect to pressure or drainage. In particular, a compromise between the temperature control of the plurality of battery cells and the electrical components and / or electronic components and voltage converters can be avoided because independent temperature control of these components is possible.

[0035] Here, in particular a third sealing element can also be arranged between the second housing element and the third housing element. For this purpose, the second housing element and / or the third housing element can, for example, be configured with corresponding receptacles for the third sealing element, in which the sealing element can be accommodated. For example, such corresponding receptacles can be implemented as sealing grooves. By connecting the second housing element and the third housing element, the third sealing element can be correspondingly compressed for sealing. Therefore, the second temperature control space can be correspondingly sealed relative to the surrounding environment. Through this, it is particularly possible to prevent the temperature control fluid from entering the inner space and reaching the plurality of battery cells when there is a possible leakage in the second temperature control space.

[0036] Preferably, the first temperature control structure, the second temperature control structure and / or the third temperature control structure are / is configured as flow guiding elements, flow disrupting elements or flow limiting devices.

[0037] In particular, the first temperature control structure, the second temperature control structure and / or the third temperature control structure can each be formed by a corresponding die-cast housing.

[0038] In this case, a flow-guiding element is to be understood as an element which is arranged within the respective temperature-controlled chamber and which serves to divert the fluid without significantly increasing turbulence.

[0039] In this case, a turbulent element is to be understood as an element which is arranged within the respective temperature-controlled chamber and which serves to increase the turbulence of the fluid, in particular to bring about a transition from laminar flow to turbulence, in order nevertheless to achieve improved heat dissipation.

[0040] In this case, a current limiting device is to be understood as an element which mechanically limits the corresponding temperature-controlled space.

[0041] To this end, it should be noted in particular that the second temperature control structure and the third temperature control structure can jointly influence the temperature control fluid flowing through the second flow space.

[0042] Advantageously, the plurality of battery cells are thermally connected to a first inner side of the interior space, wherein the first inner side is arranged adjacent to the first temperature control structure. In this case, a first heat balance element, such as a thermally conductive adhesive, can be arranged between the plurality of battery cells and the inner side.

[0043] It is also advantageous if the electrical and / or electronic components are thermally connected to a second inner side of the interior space, wherein the second inner side is arranged adjacent to the second temperature control space. In this case, a second heat balance element, such as a thermally conductive adhesive or a so-called thermal interface material (TIM), can be arranged between the electrical and / or electronic components.

[0044] For example, by connecting the circuit board including the electronic components to the second housing element, for example by means of screws, a reliable heat conduction can be formed. As a result, a relatively short thermal path is obtained overall between the temperature control fluid flowing through the second temperature control chamber and the circuit board, which has a relatively low thermal resistance.

[0045] It is also advantageous if the voltage converter is connected to a third inner side of the third housing element in a heat-conducting manner, wherein the third inner side is arranged in the immediate vicinity of the second temperature control chamber. In this case, a third heat balancing material, such as a heat-conducting adhesive or a so-called thermal interface material (TIM), can be arranged between the voltage converter and the third inner side. By connecting the voltage converter to the third housing element, such as by means of screws, a reliable heat conduction can be established. As a result, a relatively short thermal path is obtained overall between the temperature control fluid flowing through the second temperature control chamber and the voltage converter, which thermal path has a relatively low thermal resistance.

[0046] The subject of the present invention is also the use of the battery pack according to the invention just described for temperature control and in particular cooling the plurality of battery cells, the electrical component and / or the electronic component and / or the voltage converter, wherein a temperature control fluid constructed as a temperature control liquid or a temperature control gas flows around a first temperature control structure or wherein a temperature control fluid constructed as a temperature control liquid flows through a second temperature control space. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Exemplary embodiments of the invention are illustrated in the drawings and are explained in more detail in the following description.

[0048] in:

[0049] Figure 1 An embodiment of a battery pack according to the invention is shown in a perspective view;

[0050] Figure 2 The cross-sectional view shows the Figure 1 A battery pack according to an embodiment of the present invention;

[0051] Figure 3 A bottom view of an embodiment of a first housing element of a battery pack according to the present invention is shown in perspective;

[0052] Figure 4 A perspective view showing the Figure 3 A top view of an embodiment of a first housing element of a battery pack according to the present invention;

[0053] Figure 5 A top view of an embodiment of a second housing element of a battery pack according to the invention is shown in perspective;

[0054] Figure 6 A perspective view showing the Figure 5 A bottom view of an embodiment of a second housing element of a battery pack according to the present invention;

[0055] Figure 7 A bottom view of an embodiment of a third housing element of a battery pack according to the present invention is shown in perspective;

[0056] Figure 8 A perspective view showing the Figure 7 A top view of an embodiment of a third housing element of a battery pack according to the present invention;

[0057] Fig. 9 A first exploded view of a fragment of a battery pack according to the invention is shown in a perspective view; and

[0058] Fig.10 A second exploded view of a detail of a battery pack according to the invention is shown in a perspective view. DETAILED DESCRIPTION

[0059] Figure 1 An embodiment according to the invention of a battery pack 1 is shown in a perspective view. Figure 2 The cross-sectional view shows the Figure 1 The battery pack 1 according to the embodiment of the present invention. Now, Figure 1 and 2 should be described together.

[0060] The battery pack 1 includes a first housing member 2, a second housing member 3 and a third housing member 4. Figure 1 and 2 In the embodiment of the battery pack 1 shown in FIG. 1 , the first housing element 2 is designed as a die-cast housing 20 , the second housing element 3 is designed as a die-cast housing 30 , and the third housing element 4 is designed as a die-cast housing 40 .

[0061] The first housing element 2 and the second housing element 3 are jointly configured to accommodate an inner space 5 of the battery module 6. Figure 2 The interior space 5 and the battery module 6 can be seen in the cross-sectional view of FIG. In particular, the first housing element 2 and the second housing element 3 are connected to each other in a fluid-tight manner. In particular, a first sealing element 131 is present between the first housing element 2 and the second housing element 3. In particular, the first housing element 2 and the second housing element 3 can be connected to each other in a screw-tight manner.

[0062] A plurality of battery cells 7 are accommodated in the interior space 5. In this case, a plurality of battery cells 7 of a battery module 6 are electrically conductively connected in series and / or in parallel with one another. Figure 2As can be seen in FIG. 8 , the plurality of battery cells 7 are designed as prismatic battery cells 70 .

[0063] Furthermore, the inner space 5 contains electrical components 8 of the battery module 6 and electronic components 9 of the battery module 6. The electrical components 8 may be, for example, cell connectors 80, which connect a plurality of battery cells 7, 70 to each other in an electrically conductive manner in series and / or in parallel. The electrical components 8 may also be current-conducting wires. The electronic components 9 of the battery module 6 may be, for example, switches, fuses, battery control systems and / or resistors. It is particularly preferred that the electrical components 8 be connected to the battery module 6 in a manner that allows the battery cells 7, 70 to be electrically conductively connected to each other in series and / or in parallel. Figure 2 As can be seen in FIG. 8 , the electronic component 9 is at least partially integrated into a printed circuit board 90 .

[0064] The first housing element 2 is provided with a first temperature control structure 101 on the side facing away from the interior space 5. Figure 1 and 2 In the embodiment, the first temperature control structure 101 is arranged on a side of the first housing element 2 facing away from the second housing element 3. In addition, Figure 2 It is also shown that the cover element 14 is arranged on the first housing element 2. Here, the cover element 14 and the first housing element 2 together form a first temperature control space 111 through which a temperature control fluid can flow. Here, the first temperature control structure 101 is arranged within the first temperature control space 111. The cover element 14 can be connected to the first housing element 2 in a materially compatible manner. Here, it is also preferred that a second sealing element 132 can be arranged between the first housing element 2 and the cover element 14.

[0065] The second housing element 3 is connected to the third housing element 4 on the side facing away from the interior space 5. In particular, the second housing element 3 is connected to the third housing element 4 on the side facing away from the first housing element 2. Here, the second housing element 3 and the third housing element 4 are connected to each other while forming a second temperature control space 112 through which a temperature control fluid can flow.

[0066] In this case, the third housing element 4 accommodates a voltage converter 12 . The voltage converter 12 is, in particular, a DC voltage converter 120 .

[0067] In particular, Figure 1 It is also shown that the battery pack 1 has a first connection 151 and a second connection 152. The first connection 151 is configured to supply a temperature control fluid to the battery pack 1, while the second connection 152 is configured to discharge the temperature control fluid from the battery pack 1. The temperature control fluid can flow through the battery pack 1 and in particular the first temperature control chamber 111 and the second temperature control chamber 112 in series or in parallel.

[0068] Figure 3A perspective view of an embodiment of a first housing element 2 of a battery pack 1 according to the invention is shown from below. Figure 4 A perspective view of an embodiment of a first housing element 2 of a battery pack 1 according to the invention is shown in a top view. Figure 3 and 4 Describe together.

[0069] first, Figure 3 A first temperature control structure 101 is shown.

[0070] It can be seen here that the first temperature control structure 101 comprises a flow guide element 161 , a baffle element 162 and a flow limiting device 163 . The temperature control structure 101 has the effect that a flow direction indicated by an arrow is formed in the first temperature control chamber 111 .

[0071] In addition, Figure 3 Also shown are connection points 17 for the integral connection of the cover element 14 .

[0072] also, Figure 3 and 4 It is also shown that the first housing element 2 has a temperature control fluid inlet 181 and a temperature control fluid outlet 182. The temperature control fluid inlet 181 is designed to allow the temperature control fluid to flow into the first temperature control chamber 111, while the temperature control fluid outlet 182 is designed to allow the temperature control fluid to flow out of the first temperature control chamber 111.

[0073] from Figure 4 The first inner side 191 of the inner space 5 can be seen in FIG. Here, the first inner side 191 is arranged adjacent to the first temperature control structure 101, which can also be seen from Figure 2 In this case, in an embodiment of the battery 1 according to the invention, the plurality of battery cells 7 are thermally connected to a first inner side 191 of the interior space 5. In particular, a Peltier element 26 to be explained later can be connected to this first inner side.

[0074] In addition, from Figure 4 Possible connecting elements 21 for connection to the second housing element 3 , which are designed as screw points 210 , can also be seen in FIG.

[0075] Figure 5 A perspective view of a top view of an embodiment of a second housing element 3 of a battery pack 1 according to the invention is shown. Figure 6 A bottom view of an embodiment of the second housing element 3 of the battery pack 1 according to the invention is shown in a perspective view. Figure 5 and 6 The embodiments of the second housing element 3 will now be described together.

[0076] from Figure 5It can be seen first that the second housing element 3 forms a second temperature control structure 102. For example, the second temperature control structure 102 may include a flow guide element 161 and a flow limiting device 163. Through this, in particular, a flow guide indicated by arrows can be formed in the second temperature control space 112.

[0077] In addition, from Figure 5 It can also be seen that the second housing element 3 forms a temperature control fluid inlet 183 and a temperature control fluid outlet 184. The temperature control fluid inlet 183 is configured to allow the temperature control fluid to flow into the second temperature control chamber 112, while the temperature control fluid outlet 184 is configured to allow the temperature control fluid to flow out of the second temperature control chamber 112.

[0078] The temperature control fluid inlet 183 of the second housing element 3 can be connected in a fluid-conducting manner to the temperature control fluid outlet 182 of the first housing element 2 , for example. The temperature control fluid can thus first flow through the first temperature control chamber 111 and then through the second temperature control chamber 112 .

[0079] Furthermore, the temperature control fluid outlet 184 of the second housing element 3 can be connected in a fluid-conducting manner to the temperature control fluid inlet 181 of the first housing element 2 , for example. As a result, the temperature control fluid can first flow through the second temperature control chamber 112 and then through the first temperature control chamber 111 .

[0080] Figure 6 The second inner side 192 of the interior space 5 is shown. Here, the second inner side 192 is arranged in close proximity to the second temperature control space 112. Here, the electrical component 8 and / or the electronic component 9 is thermally connected to the second inner side 192. As a result, reliable temperature control is possible.

[0081] In addition, from Figure 6 Possible connecting elements 22 for connection to the third housing element 4 , which are designed as screw points 220 , can also be seen.

[0082] also, Figure 5 It is also shown that the second housing element 3 has a Figure 5 The receiving portion 24 of the sealing element 133 (not shown) is provided. This makes it possible to reliably seal the second temperature control chamber 112.

[0083] Figure 7 A bottom view of an embodiment of a third housing element 4 of a battery pack 1 according to the invention is shown in a perspective view. Figure 8 A perspective view showing the Figure 7 A top view of an embodiment of the third housing element 4 of the battery pack 1 according to the present invention. Figure 7 and 8 Describe together.

[0084] from Figure 7 It can be seen first that the third housing element 4 forms a third temperature control structure 103. For example, the third temperature control structure 103 may include a flow-disturbing element 162 and a flow-limiting device 163. Through this, in particular, a flow guide indicated by arrows can be formed in the second temperature control space 112.

[0085] In addition, from Figure 7 and 8 It can also be seen in FIG. 1 that the third housing element 4 has a first matching piece 185 for the temperature-control fluid inlet 183 of the second housing element 3 . The third housing element 4 also has a second matching piece 186 for the temperature-control fluid outlet of the second housing element 3 .

[0086] In addition, from Figure 7 and 8 Possible connecting elements 23 for connection to the second housing element 3 , which are designed as screw points 230 , can also be seen.

[0087] Figure 8 Also shown is a third inner side 193 of the third housing element 4 . The third inner side 193 of the third housing element 4 is arranged in the immediate vicinity of the second temperature control chamber 112 . The voltage converter 12 or DC voltage converter 120 is connected to the third inner side 193 in a heat-conducting manner.

[0088] Fig. 9 A first exploded view of a detail of a battery pack 1 according to the invention is shown in a perspective view.

[0089] Here, the first housing element 2 can be seen. Also visible are a plurality of battery cells 7 which are electrically conductively connected in series and / or in parallel with one another and are arranged in the interior 5 .

[0090] In this case, the plurality of battery cells 7 can also be pressed against one another, for example.

[0091] A first heat balancing element 251 may also be arranged between the plurality of battery cells 7 and the first housing element 2 .

[0092] Fig. 9 The following embodiment is also shown, in which a Peltier element 26 is additionally arranged. The Peltier element 26 is connected to a heat sink 28 by means of a thermally conductive adhesive 27. The heat sink 28 serves to evenly distribute the heat emitted by the plurality of battery cells 7, so that a uniform heat dissipation can thus be achieved. The heat sink 28 can be connected to the first housing element 2 in a screw-fastened manner, for example. The plurality of battery cells 7 can also be bonded to the heat sink 28, for example.

[0093] The first heat balance element 251 is arranged between the Peltier element 26 and the first housing element 2 .

[0094] The Peltier element 26 is an electrically operated heat pump. In this case, energy is transferred from one side to the other side in the form of heat and can be dissipated there. The Peltier element 26 is based on the so-called Peltier effect, which states that energy in the form of heat can be transferred via a current flowing through a semiconductor. As a result, a temperature difference is formed on both sides. The Peltier element 26 is therefore a heat pump based on the transport of an electric current in a semiconductor.

[0095] Fig.10 A second exploded view shows a detail of a battery pack 1 according to the invention in a perspective view.

[0096] Here, the second housing element 3 and the third housing element 4 can be seen. The third sealing element 133 can also be seen, which is arranged between the second housing element 3 and the third housing element 4. In addition, Fig.10 Also shown is an electrical component 8 or an electronic component 9 which is integrated into a circuit board 90, for example. Fig.10 Also visible in FIG. 1 is a voltage converter 12 which is designed, for example, as a DC voltage converter 120 .

[0097] A second heat compensation element 252 may also be arranged between the electrical component 8 and / or the electronic component 9 or the printed circuit board 10 and the second housing element 3 .

[0098] A third heat compensation element 253 may also be arranged between the voltage converter 12 or the DC voltage converter 120 and the third housing element 4 .

[0099] also, Fig.10 Also shown is a connection piece 187 which serves to connect the temperature-control fluid inlets 181 , 183 to corresponding temperature-control fluid outlets 182 , 182 in a fluid-conducting manner, so that a serial throughflow of the first temperature-control chamber 111 and the second temperature-control chamber 112 is formed.

Claims

1. A battery pack comprising A first housing element (2) and a second housing element (3), the first housing element and the second housing element are jointly configured to accommodate an inner space (5) of a battery module (6), wherein A plurality of battery cells (7) of the battery module (6) are arranged in the inner space (5) and are electrically connected in series and / or in parallel with one another, and wherein A first element of a battery pack control device is also arranged in the inner space (5), wherein The first housing element (2) is configured with a first temperature control structure (101) on a side facing away from the interior space (5) and the second housing element (3). It is characterized in that The second housing element (3) is connected to a third housing element (4) on a side facing away from the interior space (5) and the first housing element (2) to form a second temperature control space (112) through which a temperature control fluid can flow, wherein The second housing element (3) constructs a second temperature control structure (102), the third housing element (4) constructs a third temperature control structure (103), and the second housing element (3) and the third housing element (4) together construct the second temperature control space (112), wherein The third housing element (4) accommodates the second element of the battery pack control device.

2. The battery pack according to claim 1, It is characterized in that The first element of the battery control device comprises at least one electrical component (8) and / or at least one electronic component (9) of the battery module (6), and The second component of the battery pack control device is a voltage converter (12).

3. The battery pack according to claim 2, It is characterized in that The voltage converter (12) is a direct current voltage converter (120).

4. The battery pack according to claim 1, It is characterized in that The second element of the battery control device comprises at least one electrical component (8) and / or at least one electronic component (9) of the battery module (6), and The first element of the battery pack control device is a voltage converter (12).

5. The battery pack according to claim 4, It is characterized in that The voltage converter (12) is a direct current voltage converter (120).

6. The battery pack according to any one of claims 1 to 5, It is characterized in that The first housing element (2), the second housing element (3) and / or the third housing element (4) are each designed as a die-cast housing (20, 30, 40).

7. The battery pack according to any one of claims 1 to 5, It is characterized in that The first housing element (2) and the second housing element (3) are connected to one another in a fluid-tight manner, wherein A first sealing element (131) is arranged between the first housing element (2) and the second housing element (3).

8. The battery pack according to any one of claims 1 to 5, It is characterized in that The plurality of battery cells (7) are configured as prismatic battery cells (70).

9. The battery pack according to any one of claims 2 to 5, It is characterized in that The electrical components (8) of the battery module (6) are battery connectors (80) and / or wires, and The electronic components (9) of the battery module (6) are switches, fuses, battery control systems and / or resistors.

10. The battery pack according to any one of claims 2 to 5, It is characterized in that The at least one electronic component (9) is integrated into a circuit board (90).

11. The battery pack according to any one of claims 1 to 5, It is characterized in that The cover element (14) is arranged on the first housing element (2) together with the first temperature control structure (101) to form a first temperature control chamber (111) through which a temperature control fluid can flow.

12. The battery pack according to claim 11, It is characterized in that The battery pack (1) has a first connection end (151) and a second connection end (152), wherein the first connection end (151) is configured to supply a temperature control fluid to the battery pack (1), and the second connection end (152) is configured to discharge the temperature control fluid from the battery pack (1), wherein The battery pack (1) has a temperature-control fluid guide which is designed as follows: The temperature control fluid can flow through the first temperature control space (111) and the second temperature control space (112) in series or in parallel.

13. The battery pack according to claim 11, It is characterized in that The cover element (14) is connected to the first housing element (2) in a materially bonded manner, wherein A second sealing element (132) is further arranged between the first housing element (2) and the cover element (14); or The cover element (14) is formed by the first housing element (2).

14. The battery pack according to any one of claims 1 to 5, It is characterized in that A third sealing element (133) is arranged between the second housing element (3) and the third housing element (4).

15. The battery pack according to any one of claims 1 to 5, It is characterized in that The first temperature adjustment structure (101), the second temperature adjustment structure (102) and the third temperature adjustment structure (103) are respectively configured as at least one of a flow guiding element (161), a flow disturbing element (162) and a flow limiting device (163).

16. The battery pack according to any one of claims 2 to 5, It is characterized in that The plurality of battery cells (7) are thermally connected to a first inner side (191) of the inner space (5) which is arranged adjacent to the first temperature regulating structure (101), The electrical component (8) and / or the electronic component (9) is arranged in a heat-conducting manner with respect to a second inner side (192) of the interior space (5) which is arranged adjacent to the second temperature-controlled space (112), and / or The voltage converter (12) is arranged in a heat-conducting manner with respect to a third inner side (193) of the third housing element (4) which is arranged adjacent to the second temperature-controlled chamber (112).

17. Application of the battery pack (1) according to one of claims 2 to 5 for temperature control of the plurality of battery pack cells (7), the electrical components (8) and / or the electronic components (9) and / or the voltage converter (12), wherein a temperature control fluid constructed as a temperature control liquid or a temperature control gas flows around the first temperature control structure (101); or wherein a temperature control fluid constructed as a temperature control liquid or a temperature control gas flows through the second temperature control space (112).

18. The use according to claim 17, It is characterized in that The temperature adjustment includes cooling.

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