Activated carbon cartridge, compensation container and battery cooling system

Abstract

The invention relates to an activated carbon cartridge (12) for a compensation container (1) of a battery cooling system (3), comprising a cartridge housing (15) having a canister (17) and a cover (18), the canister base (25) of the canister (17) and the cover (18) being air-permeable and being covered, in particular from the inside, by a fabric or nonwoven fabric (19), according to the invention, activated carbon (24) is arranged in the cartridge housing (15), and the activated carbon cartridge has a seal (23) arranged on the tank base (25) for sealing against an intermediate wall (13) of the container housing (4) of the compensation container (1), and has a spring (14) which is supported on the cover (18). In this way, an embodiment which is friendly to assembly and optimized in structural space can be achieved.

Description

Technical Field

[0001] The present invention relates to an activated carbon cartridge for a compensation container of a battery cooling system. Furthermore, the present invention relates to a compensation container having such an activated carbon cartridge and a battery cooling system having such a compensation container. Background Art

[0002] Due to environmental considerations, electric vehicles or hybrid vehicles are increasingly attracting the attention of consumers and are accordingly becoming increasingly common on the roads. In order to increase the range and efficiency of such electric vehicles or hybrid vehicles, it is sought to keep the traction battery of such an electric vehicle or hybrid vehicle within the optimal temperature window for the traction battery. For this purpose, temperature control devices, in particular cooling devices, are used in a known manner.

[0003] Here, such a battery cooling system for cooling in particular a traction battery also includes a compensation container in which air is stored as a compensation cushion for the temperature-induced volume change of the coolant. The coolant expands due to the temperature increase, which can lead to a high pressure load in the compensation container and damage the compensation container if the resulting overpressure cannot be discharged and thus needs to be avoided. For this reason, this type of compensation container is usually connected to the environment so that, if necessary, the pressure difference caused by the temperature can be reduced by blowing air into the environment. In order to also prevent or at least reduce the undesired discharge of hydrocarbons into the environment, activated carbon filters have hitherto been provided, which are traversed by the air to be blown into the environment and are arranged separately from the compensation container. If the coolant cools, the coolant contracts, which in turn creates a negative pressure in the compensation container, resulting in the suction of fresh air from the environment. In order to prevent or at least reduce the undesired entry of moisture into the coolant, so-called dryer cartridges have hitherto been provided, in which a desiccant is arranged, which is traversed by the fresh air sucked in from the environment during the suction process and absorbs moisture and dries the sucked-in fresh air here.

[0004] However, a disadvantage of the known activated carbon filters is their relatively large additional structural space requirement and the laborious assembly. Summary of the Invention

[0005] Therefore, the present invention studies the following problem: to provide an improved or at least an alternative embodiment for an activated carbon cartridge of a compensation container for a battery cooling system, by means of which the disadvantages known from the prior art can be overcome.

[0006] According to the present invention, this problem is solved by the subject matter of independent claim 1. Advantageous embodiments are the subject matter of the dependent claims.

[0007] The present invention is based on the following general concept: For the first time, an activated carbon cartridge is proposed, which can be inserted into the compensation container of a battery cooling system in a form-fitting manner extremely easily. In order to establish this type of form-fitting connection, the activated carbon cartridge for the compensation container of a battery cooling system according to the present invention has a cartridge housing, which has a can and a lid, wherein the bottom of the can and the lid are at least partially constructed in an air-permeable manner and are especially covered with a fabric or non-woven fabric from the inside. Herein, activated carbon is arranged in the cartridge housing. Hereby, the non-woven fabric prevents the activated carbon from being undesirably discharged. In addition, a seal is provided on the bottom of the can for sealing against the intermediate wall of the container housing of the compensation container, wherein the seal surrounds the air-permeable area on the bottom of the can. A spring is also provided, which is supported on the lid. Thereby, the activated carbon cartridge can not only be arranged in the container housing of the compensation container in a structurally space-optimized manner, but also obtains a fixed external dimension, by means of which the activated carbon cartridge can be received in a form-fitting manner in a receiving portion complementary thereto in the container housing. Through the cartridge housing, the replacement of the activated carbon cartridge can also be relatively easily achieved by removing it from the container housing and inserting a new activated carbon cartridge into the assigned receiving portion. In addition, through the seal and the spring, the tensioning of the activated carbon cartridge in the assigned receiving portion of the container housing can be achieved, and thus reliable fixation and sealing can be achieved.

[0008] In an advantageous expansion of the activated carbon cartridge according to the present invention, the lid can move piston-like in the can. In addition, the activated carbon is arranged in the cartridge housing as a filler / loose material. In this case, the loose activated carbon can be pre-tensioned by a spring supported on the lid on the one hand and on the container housing on the other hand, whereby the activated carbon is not ground or worn during operation. In addition, this type of filler allows the maximum possible utilization of the internal space formed by the can and the lid of the cartridge housing and thus allows the arrangement of as much activated carbon as possible, whereby a high filtration degree or blocking degree can be achieved. The spring can also achieve a lasting re-tensioning, thereby reducing the wear of the activated carbon and maintaining the filter power of the activated carbon for a long time.

[0009] In an alternative embodiment of the activated carbon cartridge according to the present invention, the activated carbon is compressed into a honeycomb activated carbon monolith and can thus be used without a cartridge housing. Herein, this type of activated carbon monolith offers the following great advantages: The separation function can be constructed not only resource-savingly but also weight-optimized. The time-consuming and dusty filling and weighing of loose activated carbon are also omitted, as well as the cartridge housing.

[0010] In an alternative embodiment of the activated carbon cartridge, the activated carbon is arranged on / in a wound filter or a pleated filter, i.e., arranged without a cartridge housing. Thus, the activated carbon is applied to the wound filter or the pleated filter. This type of embodiment offers the following great advantages: By means of the activated carbon and the wound filter or the pleated filter, not only hydrocarbons can be blocked, but also other particles, such as dirt particles, depending on the structure of the carrier material of the wound filter or the pleated filter.

[0011] Suitably, the cartridge housing is constructed of plastic. Here, the can and the lid are constructed of plastic, offering the following great advantages: The cartridge housing can be adapted to different sizes not only easily but also extremely flexibly, especially by adapting the plastic injection molding tool. In addition, constructing the cartridge housing of plastic, especially constructing the cartridge housing as a plastic injection molded part, also enables cost-effective manufacturing.

[0012] Furthermore, the present invention is based on the following general concept: constructing a compensation container for a battery cooling system to compensate for the air volume based on the temperature-induced volume change of a cooling medium, especially oil. The compensation container has a double-shell container housing, and the container housing has a second receiving portion in which the activated carbon cartridge or the monolithic honeycomb activated carbon or the wound filter with embedded activated carbon or the pleated filter with embedded activated carbon can be positively arranged. Here, the compensation container for the battery cooling system, especially for air, according to the present invention has the aforementioned container housing made of plastic, which has a first shell and a second shell sealed to it. Here, a first receiving portion is constructed in the first shell and / or in the second shell, and a dryer cartridge with a desiccant, such as zeolite or silica gel, is positively received in the first receiving portion, while in the second receiving portion, which can also be arranged in the first shell and / or in the second shell, the activated carbon cartridge according to the present invention or the monolithic honeycomb activated carbon or the wound filter with embedded activated carbon or the pleated filter with embedded activated carbon is positively arranged. This type of activated carbon cartridge, like the monolithic honeycomb activated carbon, the wound filter with embedded activated carbon, or the pleated filter with embedded activated carbon, can receive harmful substances, such as hydrocarbons. In addition, a first valve and a second valve are provided. When there is overpressure in the compensation container, air can be blown out from the compensation container to the environment via the first valve. When there is negative pressure in the compensation container, fresh air can be sucked from the environment into the compensation container via the second valve. "Fresh air" can / should be understood as ambient air here. By constructing the container housing of the compensation container in a double-shell manner, with a dryer cartridge and, for example, an activated carbon cartridge arranged therein, a very cost-effective container housing of the compensation container can be achieved. At the same time, assembly advantages are generated because only the dryer cartridge constructed as an insert needs to be inserted into the first receiving portion of the first and / or second shell, and the activated carbon cartridge constructed as an insert needs to be inserted into the second receiving portion of the first and / or second shell, and then the two shells of the container housing are sealed to each other. Thus, a protected arrangement of the dryer cartridge or the activated carbon cartridge in the container housing during the service life can be achieved. This of course also applies to the monolithic honeycomb activated carbon or the wound filter with embedded activated carbon or the pleated filter with embedded activated carbon used in place of the activated carbon cartridge. Thus, the hitherto necessary manufacturing of the container housing and the subsequent installation of the dryer filter element or the activated carbon cartridge or the monolithic honeycomb activated carbon or the wound filter or the pleated filter can be completely omitted.Here, the production of the compensating container according to the invention can be carried out, in particular, even automatically, since by means of the inner contour of the first receiving part, which is constructed substantially complementary to the outer contour of the dryer drum, and the inner contour of the second receiving part, which is constructed substantially complementary to the outer contour of the activated carbon drum, the integral honeycomb activated carbon, the wound filter or the pleated filter, a form-fitting insertion of the dryer drum into the first receiving part and a form-fitting insertion of the activated carbon drum, the integral honeycomb activated carbon, the wound filter or the pleated filter into the second receiving part can be achieved, for which no worker is required. When it may be necessary to replace the dryer drum / activated carbon drum, the integral honeycomb activated carbon, the wound filter or the pleated filter, and / or when it may be necessary to replace the container housing, by arranging not only the first valve but also the second valve on the container housing, these two valves can be replaced simultaneously, whereby, for example, clogging of the valves due to prolonged use can be reliably avoided.

[0013] In an advantageous refinement of the compensating container according to the invention, the first valve is arranged in the intermediate wall which separates the second receiving part from the interior space of the container housing. Here, air is usually arranged in the interior space of the container housing, and depending on the temperature of the coolant, this air is loaded with pressure or negative pressure by the expansion or contraction of the coolant. By arranging the first valve in the intermediate wall which separates the second receiving part from the interior space of the container housing, a direct assignment of the first valve to the second receiving part can be achieved. Of course, downstream of the second receiving part, an outward opening is provided in the wall of the container housing for exchange with the environment.

[0014] Here, the second valve is arranged in the outer wall of the container housing, wherein the outer wall on which the second valve is arranged separates the first receiving part from the environment. Thus, in the case of negative pressure in the container housing or the compensating container, fresh air is sucked in from the environment via the second valve and the first receiving part in which the dryer drum is arranged. Thus, the fresh air sucked in from the environment is dried by the desiccant in the dryer drum, whereby, in particular, it can be prevented that moisture and / or water enter the compensating container or the battery cooling system. Excessive humidity can make the coolant conductive, which in adverse cases, especially in the case of immersion cooling, can lead to a short circuit.

[0015] Here, the described second valve can also be configured as a double valve, which also enables air to be blown out of the container housing into the environment.

[0016] Furthermore, the respective input and output ends of the compensating container can be provided with additional protective covers which interact with the atmosphere. These additional protective covers protect the valves or the internal activated carbon drum against improper ingress of water, dust or other unwanted interfering bodies.

[0017] In a particularly preferred embodiment, a spring is arranged on the dryer device or on the activated carbon cartridge, which pre-tensions the dryer cartridge or the activated carbon cartridge against the container housing. Via a spring of this type, a reliable and orientation-fixed arrangement of the dryer cartridge in the first receiving part and a reliable and orientation-fixed arrangement of the activated carbon cartridge in the second receiving part can be achieved, wherein the spring pre-tensioning simultaneously prevents the dryer cartridge and / or the activated carbon cartridge from generating, during operation, rattling noises which are perceived as interference, for example. A spring of this type can be configured, for example, as a cost-effective helical spring, wherein the helical spring for pre-tensioning the dryer cartridge can be arranged in the first receiving part in such a way that it encloses a second valve in the outer wall of the container housing and is thus fixed by the second valve. If the lid can move piston-like in the tank, the activated carbon or the drying granules, which are configured, for example, as loose material, can also be pre-tensioned via this spring, whereby the activated carbon undergoes less wear during operation.

[0018] In a particularly preferred embodiment of the compensation container according to the invention, the first housing and / or the second housing is configured as a plastic injection molding. Here, configuring the first housing and / or the second housing as a plastic injection molding offers the following great advantages: The container housing and the compensation container can be manufactured not only with high quality but also cost-effectively.

[0019] Suitably, the first housing and the second housing are welded to each other. When the two housings are configured as plastic injection moldings, it is suitable to weld the two housings to each other for a sealed connection of the two housings. Alternatively, of course, it is also possible to consider gluing the two housings to each other. As a further alternative, purely theoretically, it is possible to consider connecting the two housings to each other via a clip connection or a screw connection, which offers the following great advantage: The container housing can be opened for replacing the dryer cartridge or the activated carbon cartridge, the monolithic activated carbon, the wound filter, or the pleated filter, and the container housing can be used again after replacing the dryer cartridge or the activated carbon cartridge, the monolithic activated carbon, the wound filter, or the pleated filter. In this case, a seal should also be placed between the two housings.

[0020] In a further advantageous embodiment of the compensating container according to the invention, the first shell and / or the second shell is constructed of polyoxymethylene (POM). POM is a partially crystalline thermoplastic which has high mechanical strength and stiffness and in addition has high abrasion resistance and low hygroscopicity, which is particularly advantageous especially when used for the compensating container according to the invention, since in this case water storage or moisture absorption increases the electrical conductivity of the dielectric coolant. Alternatively, polyketone can also be used as the plastic for the first and / or second shell. Polyketone (PK) is a thermoplastic high-performance polymer which has high impact toughness, low wear, good solvent resistance and low water absorption. Silicone also has high environmental compatibility. In order to further increase the mechanical strength and abrasion resistance here, the plastic can have glass fibers, in particular 25% glass fibers, in particular constructed as POM GF-25.

[0021] Furthermore, the invention is based on the general concept of equipping a battery cooling system with the compensating container described in the above paragraphs and thereby transferring the advantages described with regard to the compensating container to the battery cooling system. Specifically, the advantage of a battery cooling system equipped with a compensating container according to the invention lies in cost-effective manufacture, where, in order to regularly replace the dryer cartridge and / or the activated carbon cartridge, the monolithic activated carbon, the wound filter or the pleated filter, only the compensating container needs to be replaced, or, in the case where the container housing of the compensating container can be opened, only the dryer cartridge and / or the activated carbon cartridge, the monolithic activated carbon, the wound filter or the pleated filter needs to be replaced.

[0022] Other important features and advantages of the invention result from the dependent claims, the drawings and the associated description of the drawings.

[0023] It should be understood that the features mentioned above and to be elaborated below can be used not only in the combinations given accordingly, but also in other combinations or individually, without departing from the framework of the invention. The individually marked components mentioned above and below of a superior unit (such as a device, an apparatus or a component) can form separate members or parts of the unit or can be regions or sections which form the unit as a whole, even if this is shown otherwise in the drawings. Description of the Drawings

[0024] Preferred embodiments of the invention are shown in the drawings and are elaborated in more detail in the following description, where the same reference numerals refer to the same or similar or functionally identical components.

[0025] The drawings schematically show respectively:

[0026] Figure 1 A view of a compensating container according to the invention of a battery cooling system according to the invention,

[0027] Figure 2 show a schematic view as Figure 1 shown, but in another perspective,

[0028] Figure 3 show an exploded schematic view of a compensation container according to the present invention,

[0029] Figure 4 show a cross-sectional view of an activated carbon cartridge according to the present invention,

[0030] Figure 5 show a front view of the activated carbon that constitutes the activated carbon cartridge as a whole according to the present invention,

[0031] Figure 6 show a front view of a wound filter of activated carbon with an activated carbon cartridge according to the present invention,

[0032] Figure 7 show a front view of a pleated filter of activated carbon with an activated carbon cartridge according to the present invention. Detailed Description

[0033] According to Figures 1 to 3 , the compensation container 1 according to the present invention has a container housing 4 made of plastic. This compensation container is for the air 2 of a battery cooling system 3 according to the present invention. The container housing has a first housing 5 and a second housing 6 connected thereto. Here, in the first housing 5 and / or in the second housing 6, a first receiving portion 7 (see Figure 3 ) is provided or configured. In the first receiving portion, a dryer cartridge 8 is arranged in a form-fitting manner. A desiccant, such as zeolite or silica gel, which is not shown in more detail, is arranged in the dryer cartridge 8. In addition, the compensation container 1 according to the present invention has a first valve 9. When there is overpressure in the compensation container 1, the air 2 can be blown out from the compensation container 1 to the environment via this first valve. When there is negative pressure in the compensation container 1, fresh air 2a reaches the compensation container 1 from the environment via a second valve 10.

[0034] In addition, a second receiving portion 11 is configured in the first housing 5 and / or the second housing 6. In this second receiving portion, an activated carbon cartridge 12 according to the present invention is received in a form-fitting manner (also see Figure 4 ). Instead of the activated carbon cartridge 12, a honeycomb activated carbon monolith 20, a wound filter 21 with activated carbon 24 embedded therein, or a pleated filter 22 with activated carbon 24 embedded therein can also be arranged in a form-fitting manner in the second receiving portion 11.

[0035] Accordingly, the illustrated compensation container 1 has a container housing 4 which has two receiving parts 7, 11 arranged therein, and in which a dryer cartridge 8 or an activated carbon cartridge 12 or a monolithic activated carbon honeycomb 20 or a wound filter 21 or a pleated filter 22 is arranged. In the following description of the drawings, reference is mainly made to the activated carbon cartridge 12, and all statements should similarly apply to the monolithic activated carbon 20 arranged in place of the activated carbon cartridge 12 or the wound filter 21 with the embedded activated carbon 24 or the pleated filter 22 with the embedded activated carbon (24).

[0036] Accordingly, in the case of overpressure in the compensation container 1, the air 2 flows out through the first valve 9 and the activated carbon cartridge 12 arranged in the second receiving part 11 into the environment. By blowing the air 2 through the activated carbon cartridge 12, the monolithic activated carbon honeycomb 20 or the wound filter 21 or the pleated filter 22, harmful substances such as hydrocarbons can be reliably blocked. Herein, fresh air 2a is sucked from the environment into the compensation container 1 via the second valve 10 and the dryer cartridge 8, and the sucked fresh air 2a is dried in the dryer cartridge. The protective cover 28 positioned at the input end for the fresh air 2a or at the output end for the air 2 prevents the entry of unwanted interfering bodies, dirt particles, etc.

[0037] Herein, the first valve 9 is arranged in the intermediate wall 13 which separates the second receiving part 11 from the interior space 16 of the container housing 4. Herein, the second valve 10 is arranged in the outer wall of the container housing 4, and the second valve can also be configured as a double valve, i.e., a valve permeable in two directions, and the outer wall separates the first receiving part 7 from the environment. Of course, the previously described second valve 10 and another overpressure valve can also be arranged in the outer wall of the container housing 4, and the air 2 is blown out of the compensation container 1 into the environment via this valve.

[0038] If one continues to observe Figure 3 , it can be seen that springs 14 are respectively arranged on the dryer cartridge 8 and on the activated carbon cartridge 12, and the springs pre-tension the dryer cartridge 8 against the container housing 4 and also pre-tension the activated carbon cartridge 12 against the container housing 4 (specifically against the intermediate wall 13 herein). By means of the two springs 14, vibration-free and thus rattle-free (klapperfrei) fixation of the dryer cartridge 8 and the activated carbon cartridge 12 in the corresponding receiving parts 7, 11 can be achieved. Thereby, in particular, an improved user comfort can be achieved due to less noise generation.

[0039] The activated carbon cartridge 12 of the compensation container 1 for the battery cooling system 3 has a cartridge housing 15 which has a can 17 and a lid 18 which can move piston-like in the can, wherein the can bottom 25 of the can 17 and the lid 18 are configured to be air-permeable and are in particular covered from the inside by a fabric or nonwoven fabric 19. For this purpose, the lid 18 and the can bottom 25 have openings 27 (see Figure 4 ). The nonwoven fabric 19 is air-permeable and at the same time prevents the activated carbon 24 from being undesirably discharged from the cartridge housing 15.

[0040] The activated carbon 24 arranged in the cartridge housing 15 can be configured as loose material (Schüttgut) (see Figure 4 ). Alternatively, the activated carbon 24 can also be configured as a honeycomb activated carbon monolith 20 (see Figure 5 ) or embedded in a wound filter 21 (see Figure 6 ) or a pleated filter 22 (see Figure 7 ). In the latter two cases, the cartridge housing 15 can be dispensed with. Here, according to Figure 4 , the activated carbon 24 can be compressed into an activated carbon monolith 20, while according to Figure 6 , the activated carbon 24 can be applied to the carrier material 26 of the wound filter 21, in particular a nonwoven fabric. Similarly, in the case of the pleated filter 22 according to Figure 7 , the activated carbon 24 can also be applied to the carrier material 26, in particular a nonwoven fabric.

[0041] A seal 23 is arranged on the can bottom 25 of the can 17 for sealing against the intermediate wall 13 of the container housing 4 of the compensation container 1. Here, the seal 23 surrounds the air-permeable area on the can bottom 25. This enables the air 2 blown out from the inner space 6 due to the temperature-induced thermal expansion of the coolant to flow compulsorily through the activated carbon cartridge 12.

[0042] Here, the first shell 5 and / or the second shell 6 and / or the cartridge housing 15 can be configured as a plastic injection molding, whereby not only high-quality manufacturing can be achieved, but also cost-effective manufacturing can be achieved. Here, the two shells 5, 6 can be welded or glued to each other, wherein, purely theoretically, it can also be considered that the two shells 5, 6 are connected to each other via a clip connection or a screw connection, which offers the great advantage that the container housing 4 can be opened for replacing the dryer cartridge 8 or the activated carbon cartridge 12, and the container housing can be reused after replacing the dryer cartridge 8 or the activated carbon cartridge 12.

[0043] Here, the first housing 5 and / or the second housing 6 can be constructed of polyoxymethylene (POM) or polyketone, i.e., made of plastics with high strength and low hygroscopicity, which is very advantageous especially for the compensating container 1 for the air 2 of the battery cooling system 3. In order to further increase the strength and wear resistance of the container housing 4 here, the plastics of the two housings 5, 6 can be reinforced with fibers, especially glass fibers.

[0044] All in all, with the activated carbon cartridge 12 according to the invention, the compensating container 1 according to the invention, and the battery cooling system 3 according to the invention, an extremely cost - advantageous, structurally space - optimized, and maintenance - friendly solution can be achieved.

Claims

1. An activated carbon cartridge (12) for a compensating container (1), the compensating container being used in a battery cooling system (3), The activated carbon cartridge has a cartridge housing (15) which has a can (17) and a cover (18), wherein: The tank bottom (25) and the lid (18) of the tank (17) are designed to be air-permeable and are covered, in particular from the inside, by a woven or nonwoven fabric (19). - wherein activated carbon (24) is arranged in the cartridge housing (15), the activated carbon cartridge has a seal (23) arranged on the tank bottom (25) for sealing against an intermediate wall (13) of the container housing (4) of the compensating container (1), The activated carbon cartridge has a spring (14) which is supported on the cover (18).

2. The activated carbon cartridge according to claim 1, It is characterized in that The activated carbon (24) is arranged as bulk material in the cartridge housing (15).

3. An activated carbon cartridge according to any one of the preceding claims, It is characterized in that The cover (18) is movable in the tank (17) in a piston-like manner.

4. An activated carbon cartridge according to any one of the preceding claims, It is characterized in that The cartridge housing (15) is constructed from plastic.

5. A compensating container (1) for a battery cooling system (3), the compensating tank has a tank housing (4) made of plastic, the tank housing having a first shell (5) and a second shell (6) connected to the first shell, -in, A first receiving portion (7) is formed in the first shell (5) and / or in the second shell (6), the compensating container has a dryer cartridge (8) which is received in the first receiving portion (7) in a form-fitting manner, the compensating container has a first valve (9) through which air (2) passes from the compensating container (1) into the environment in the event of an excess pressure in the compensating container (1), the compensating container has a second valve (10) through which fresh air (2a) from the environment enters the compensating container (1) when a negative pressure is present in the compensating container (1), wherein a second receiving portion (11) is formed in the first shell (5) and / or in the second shell (6), -Wherein, an activated carbon cartridge (12) or a honeycomb activated carbon monolith (20) or a wound filter (21) or a pleated filter (22) according to any one of the above claims is received in a form-locked manner in the second receiving portion (11), wherein the wound filter has activated carbon (24) embedded therein, and the pleated filter has activated carbon (24) embedded therein.

6. The compensating container according to claim 5, It is characterized in that The first valve (9) is arranged in an intermediate wall (13) which separates the second receiving portion (11) from an interior space (16) of the container housing (4).

7. The compensating container according to claim 5 or 6, It is characterized in that A spring (14) is provided which pretensions the dryer cylinder (8) against the container housing (4).

8. The compensating container according to any one of claims 5 to 7, It is characterized in that The first shell (5) and / or the second shell (6) are designed as plastic injection-molded parts, and / or The first shell (5) and the second shell (6) are welded, clamped, screwed or bonded to each other.

9. The compensating container according to any one of claims 5 to 8, It is characterized in that The first shell (5) and / or the second shell (6) are made of polyoxymethylene (POM) or of polyketone.

10. The compensating container according to any one of claims 5 to 9, It is characterized in that The first shell (5) and / or the second shell (6) comprises glass fibers, in particular a 25% glass fiber content in the plastic.

11. The compensating container according to any one of claims 5 to 10, It is characterized in that The second valve (10) is arranged in an outer wall of the container housing (4), which separates the first receptacle (7) from the environment.

12. A battery cooling system (3) comprising a compensating container (1) according to any one of claims 5 to 11.

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