Active carbon cartridge, compensation container, and battery cooling system

Abstract

To provide an active carbon cartridge for a compensation container for a battery cooling system which has an optimized structure space and is easily mounted.SOLUTION: An active carbon cartridge has a cartridge housing 15 including a pot 17 and a lid 18. The pot bottom part 25 of the pot 17 and the lid 18 are formed having air permeability, in particular, covered from the inner side by a woven cloth or a non-woven cloth 19. Active carbon 24 is disposed in the cartridge housing 15. The active carbon cartridge includes: a sealing seal 23 which is disposed at the pot bottom part 25 and facing an intermediate wall of a container housing of a compensation container; and a spring 14 supported by the lid 18.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to an activated carbon cartridge for a compensation container for a battery cooling system. The present invention further relates to a compensation container provided with such an activated carbon cartridge and a battery cooling system provided with such a compensation container.

[0002] Electric vehicles or hybrid vehicles are attracting increasing attention from consumers based on environmental considerations and are accordingly becoming more widespread on the roads. In this case, in order to be able to improve both the driving range and performance of such electric vehicles or hybrid vehicles, it is targeted to keep the traction battery of such electric vehicles or hybrid vehicles within an optimal temperature window with respect to this traction battery, and for this purpose, in a well-known manner, a temperature control device, in particular a cooling device, is used.

[0003] In this case, such a battery cooling system, especially for cooling a traction battery, also includes a compensation container in which air is held internally as a compensation cushion for volume changes of the cooling medium due to temperature. If the cooling medium expands due to a temperature increase, this would result in a high pressure load in the compensation container if the resulting overpressure cannot be released, and in some cases, there is a risk of damaging the compensation container, which must be avoided. For this reason, such a compensation container usually has a connection to the surroundings, whereby the pressure difference due to temperature can be reduced in some cases via the blowing out of air to the surroundings. In this case, in order to also prevent or at least reduce an undesired outflow of hydrocarbon compounds to the surroundings, conventionally, an activated carbon filter arranged separately from the compensation container through which the air to be blown out to the surroundings flows was provided. When the cooling medium is cooled and contracts, this results in a negative pressure in the compensation container, which in turn results in the suction of fresh air from the surroundings. In order to prevent or at least reduce the introduction of undesired moisture into the cooling medium at this time, conventionally, a so-called desiccant cartridge was provided, in which a drying medium that absorbs moisture and dries the fresh air sucked in from the surroundings during the suction process is arranged while the fresh air sucked in from the surroundings during the suction process flows through.

[0004] However, the disadvantages of well-known activated carbon filters lie in their relatively large additional required installation space and the laborious installation.

[0005] Therefore, the present invention addresses the problem of providing an improved or at least one alternative embodiment for an activated carbon filter for a compensation container of a battery cooling system that can overcome the disadvantages known from the prior art.

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

[0007] The present invention is based on the general idea of providing for the first time an activated carbon cartridge that can be inserted in a form-fitting manner extremely simply into a compensation container of a battery cooling system. In order to be able to form such a form-fitting connection, the activated carbon cartridge according to the invention for a compensation container for a battery cooling system has a cartridge housing with a pot and a lid, where in this case the pot bottom of the pot and the lid are at least partially formed to be air-permeable and are in particular covered from the inside by a woven fabric or a non-woven fabric. In this case, activated carbon is arranged in the cartridge housing. In this case, the unwanted outflow of the activated carbon is prevented via the non-woven fabric. Furthermore, a seal for sealing against an intermediate wall of the container housing of the compensation container, which is arranged at the pot bottom, is provided, and this seal surrounds the air-permeable region at the pot bottom. Also, a spring supported by the lid is provided. Thereby, the activated carbon cartridge can not only be arranged in the container housing of the compensation container with an optimized structural space, but also obtain a fixed outer dimension, and over this outer dimension, the activated carbon cartridge can be accommodated in a form-fitting manner in a receiving portion formed complementarily to the activated carbon cartridge in the container housing. Based on the cartridge housing, the replacement of the activated carbon cartridge can also be carried out relatively simply by removing it from the container housing and inserting a new activated carbon cartridge into the attached receiving portion. Furthermore, a preload can be applied to the activated carbon cartridge in the attached receiving portion in the container housing via the seal and the spring, and thus reliable positioning and sealing can be achieved.

[0008] In one advantageous improvement of the activated carbon cartridge according to the invention, the lid is movable like a piston within the pot. Furthermore, the activated carbon is arranged as loose material / load within the cartridge housing. In this case, a preload can be applied to the flowable activated carbon by means of a spring supported on the one hand by the lid and on the other hand by the container housing, whereby the activated carbon is not pulverized or worn during operation. Furthermore, such loose material enables maximum utilization of the inner chamber of the cartridge housing formed by the pot and the lid, thereby enabling the placement of as much activated carbon as possible, thereby achieving a high filtration or retention degree. By means of the spring, a continuous additional load can also be achieved, whereby the wear of the activated carbon is reduced and thereby the filtration performance of the activated carbon can be maintained over a long period.

[0009] In an alternative embodiment for the activated carbon cartridge according to the invention, the activated carbon is compressed to form a honeycomb-shaped activated carbon monolith, whereby it can be used without a cartridge housing. In this case, such an activated carbon monolith has the great advantage that the separation function can be formed resource-efficiently and the weight can be optimized. Similarly, the time-consuming filling and metering of loose activated carbon, which generates dust, as well as the cartridge housing are omitted.

[0010] In an alternative embodiment for the activated carbon cartridge, the activated carbon is arranged on the outer / inner surface of a wound filter or a folded filter, i.e., without a cartridge housing. That is, the activated carbon is adhered to the wound filter or the folded filter. Such an embodiment has the great advantage that hydrocarbons can be retained not only via the activated carbon and the wound filter or the folded filter, but also other particles, such as contaminating particles, depending on the configuration of the carrier material of the wound filter or the folded filter.

[0011] Preferably, the cartridge housing is formed from plastic. In this case, forming both the pot and the lid from plastic provides the advantage that the cartridge housing is not only lightweight but also extremely flexible, especially by being able to adapt plastic injection molds to various dimensions. Further, forming the cartridge housing from plastic, especially as a plastic injection molded part, also enables inexpensive manufacturing.

[0012] The present invention further forms a compensation container of a battery cooling system that compensates for the air volume based on the volume change caused by the temperature of a cooling medium, particularly oil, with a two-shell type container housing having a second accommodation portion. In the second accommodation portion, an activated carbon cartridge, or a honeycomb-shaped activated carbon monolith, or a wound filter embedded with activated carbon, or a folded filter embedded with activated carbon can be arranged in a form-fitting manner, based on the general idea. In this case, the compensation container according to the present invention for a battery cooling system, particularly for air, has a container housing made of plastic, which includes the above-described first shell and a second shell tightly coupled to the first shell. In this case, a first accommodation portion in which a desiccant cartridge provided with a drying medium, such as zeolite or silica gel, is accommodated in a form-fitting manner is formed in the first shell and / or the second shell. On the other hand, in a second accommodation portion that may also be arranged in the first shell and / or the second shell, an activated carbon cartridge according to the present invention, or a honeycomb-shaped activated carbon monolith, or a wound filter embedded with activated carbon, or a folded filter embedded with activated carbon is arranged in a form-fitting manner. In this case, such an activated carbon cartridge can adsorb harmful substances such as hydrocarbons, similar to a honeycomb-shaped activated carbon monolith, a wound filter embedded with activated carbon, or a folded filter embedded with activated carbon. Further, a first valve that can blow air from the compensation container to the surroundings when an overpressure dominates inside the compensation container, and a second valve that can suck fresh air from the surroundings into the compensation container when a negative pressure dominates inside the compensation container are provided. In this case, the concept of "fresh air" can mean / means ambient air. By forming the container housing of the compensation container, in which a desiccant cartridge and, for example, an activated carbon cartridge are arranged inside, into a two-shell type, an overall extremely inexpensive container housing of the compensation container can be achieved, and in this case, advantages in terms of assembly can also be obtained at the same time.This is because a desiccant cartridge formed as an insertion member can be inserted in a form-fitting manner into the first receiving portion of the first and / or second shell, and an activated carbon cartridge formed as an insertion member can be inserted in a form-fitting manner into the second receiving portion of the first and / or second shell, and then it is only necessary to tightly couple both shells of the container housing to each other. Thereby, an arrangement protected over the service life of the desiccant cartridge or activated carbon cartridge within the container housing can also be achieved. Of course, the same also applies to the honeycomb-shaped activated carbon monolith used instead of the activated carbon cartridge, or to the wound filter or folded filter in which activated carbon is embedded. Thereby, the manufacture of the container housing conventionally required, as well as the subsequent attachment of the desiccant cartridge or activated carbon cartridge or honeycomb-shaped activated carbon monolith or wound filter or folded filter, can be completely omitted. In this case, the manufacture of the compensation container according to the present invention can even be carried out particularly in an automated manner. This is because, based on the inner contour of the first receiving portion, which is formed substantially complementary to the outer contour of the desiccant cartridge, and the inner contour of the second receiving portion, which is formed substantially complementary to the outer contour of the activated carbon cartridge, honeycomb-shaped activated carbon monolith, wound filter or folded filter, the form-fitting insertion of the desiccant cartridge into the first receiving portion and the form-fitting insertion of the activated carbon cartridge, honeycomb-shaped activated carbon monolith, wound filter or folded filter into the second receiving portion can be carried out without the need for an operator for this purpose. By arranging both the first valve and the second valve in the container housing, both of these valves can also be replaced together when replacing the desiccant cartridge / activated carbon cartridge, honeycomb-shaped activated carbon monolith, wound filter or folded filter that may be required, and / or when replacing the container housing that may be required, thereby reliably avoiding, for example, the blockage of the valve that occurs based on extremely long use.

[0013] In one advantageous refinement of the compensating container according to the invention, the first valve is arranged in an intermediate wall separating the second receiving part from the inner chamber of the container housing. In this case, air is usually arranged in the inner chamber of the container housing, and a pressure or negative pressure is applied to the air depending on the temperature of the cooling medium, due to the expansion or contraction of the cooling medium. By arranging the first valve in the intermediate wall separating the second receiving part from the inner chamber of the container housing, a direct corresponding arrangement of the first valve with respect to the second receiving part can be achieved. On the downstream side of the second receiving part, an opening to the outside is provided in the wall of the container housing for exchange with the surroundings, of course.

[0014] In this case, a second valve is arranged on the outer wall of the container housing, and in this case, the outer wall on which the second valve is arranged separates the first receiving part from the surroundings. Thus, when a negative pressure prevails in the container housing or in the compensating container, the suction of fresh air from the surroundings takes place via the second valve and the first receiving part in which the desiccant cartridge is arranged. That is, the fresh air sucked in from the surroundings is sucked in and dried by the drying medium of the desiccant cartridge, thereby preventing, in particular, moisture and / or water from being introduced into the compensating container or the battery cooling system. Extremely high moisture can make the cooling medium conductive, which, in an undesirable situation, especially in the case of immersion cooling, can lead to a short circuit.

[0015] In this case, the above-mentioned second valve may be formed as a double valve that also allows air to be blown out from the container housing to the surroundings.

[0016] Furthermore, additional protective caps can be provided at each inlet and outlet of the compensating container that interacts with the atmosphere. These protective caps protect the valve or the activated carbon cartridge located inside from the inadvertent introduction of water, dust or other undesirable interfering bodies.

[0017] In one particularly preferred embodiment, a spring is arranged in the drying device or the activated carbon cartridge, and this spring preloads the desiccant cartridge or the activated carbon cartridge against the container housing. Through such a spring, a securely positioned arrangement of the desiccant cartridge in the first receiving part and the activated carbon cartridge in the second receiving part can be achieved. In this case, the spring preload simultaneously prevents the desiccant cartridge and / or the activated carbon cartridge from generating rattling noises that are, for example, uncomfortably felt during operation. Such a spring may be formed, for example, as an inexpensive coil spring. In this case, the coil spring that preloads the desiccant cartridge may be arranged within the first receiving part, and by surrounding the second valve provided on the outer wall of the container housing, it is position-fixed by the second valve. As long as the lid is movable like a piston within the pot, a preload can also be applied via the spring to, for example, activated carbon or desiccant granules formed as bulk loads. Thereby, the activated carbon or desiccant granules are less worn during operation.

[0018] In one particularly preferred embodiment of the compensation container according to the invention, the first shell and / or the second shell is formed as an injection-molded plastic part. In this case, forming the first and / or the second shell as an injection-molded plastic part brings the great advantage that not only can the container housing and thus the compensation container be manufactured with high quality, but at the same time it can be manufactured inexpensively.

[0019] Preferably, the first shell and the second shell are welded to each other. If both shells are formed as plastic injection molded parts, it is conceivable to weld these shells to each other in order to tightly bond both shells. Alternatively, it is of course also conceivable to bond both shells to each other. Also alternatively, purely theoretically, it is also conceivable that both shells are joined to each other via clip connection or screw fastening, which has the great advantage that the container housing can be opened to replace the desiccant cartridge or activated carbon cartridge, the honeycomb-shaped activated carbon monolith, the wound filter, or the folded filter, and after replacing the desiccant cartridge or activated carbon cartridge, the honeycomb-shaped activated carbon monolith, the wound filter, or the folded filter, this container housing can continue to be used. In this case, a seal must be inserted between both shells.

[0020] In another advantageous embodiment of the compensation container according to the invention, the first shell and / or the second shell is formed from polyoxymethylene (POM). POM is a partially crystalline thermoplastic resin with high mechanical strength and rigidity, as well as high wear resistance and low hygroscopicity, which is extremely advantageous especially when used for the compensation container according to the invention. This is because in this case, water storage or hygroscopicity increases the conductivity of the dielectric cooling medium. Alternatively, polyketone may be used as the plastic for the first and / or second shell. Polyketone (PK) is a thermoplastic high-performance polymer with high impact resistance, low wear, good solvent resistance, and low water absorption. Polyketone has high environmental compatibility. In this case, in order to be able to further increase the mechanical strength and wear resistance, the plastic may contain glass fibers, especially 25% glass fibers, and may in particular be formed as POM GF-25.

[0021] The present invention further relates to a general idea of equipping a battery cooling system with the compensation container described in the preceding paragraph, thereby transferring the advantages described for this compensation container to the battery cooling system. Specifically, the advantage of the battery cooling system equipped with the compensation container according to the present invention lies in inexpensive manufacturing. In this case, for the periodic replacement of the desiccant cartridge and / or activated carbon cartridge, honeycomb-shaped activated carbon monolith, wound filter or folded filter, only the compensation container needs to be replaced, or if the container housing of the compensation container is openable, only the desiccant cartridge and / or activated carbon cartridge, honeycomb-shaped activated carbon monolith, wound filter or folded filter needs to be replaced.

[0022] Other important features and advantages of the present invention are apparent from the dependent claims, the drawings, and the description of the drawings based on the accompanying drawings.

[0023] It is obvious that the features described above and the features described hereinafter can be used not only in the combinations described respectively, but also in other combinations or alone without departing from the framework of the present invention. For example, the above-described components and the components described hereinafter, which are separately described as higher-level aggregates such as devices, facilities or units, may form separate components or components of this aggregate even if they are shown differently in the drawings, or may be an integrated area or section of this aggregate.

[0024] Preferred embodiments of the present invention are illustrated and described in more detail in the following description. In this case, the same reference numerals are related to the same, or similar, or functionally identical components.

Brief Description of the Drawings

[0025]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

[0026] Corresponding to FIGS. 1 to 3, the compensation container 1 according to the present invention for the air 2 of the battery cooling system 3 according to the present invention has a container housing 4 made of plastic including a first shell 5 and a second shell 6 coupled to the first shell 5. In this case, a first accommodating portion 7 (see FIG. 3) is provided or formed in the first shell 5 and / or the second shell 6, and a desiccant cartridge 8 is disposed in the first accommodating portion 7 in a form-fitting manner. A drying medium (not shown in detail), for example, zeolite or silica gel, is disposed in the desiccant cartridge 8. Further, the compensation container 1 according to the present invention has a first valve 9, and when an excessive pressure dominates inside the compensation container 1, the air 2 can be blown out from the compensation container 1 to the surroundings through the first valve 9. When a negative pressure dominates inside the compensation container 1, fresh air 2a flows into the compensation container 1 from the surroundings through a second valve 10.

[0027] A second accommodating portion 11 is further formed in the first shell 5 and / or the second shell 6, and an activated carbon cartridge 12 according to the present invention (see also FIG. 4) is accommodated in the second accommodating portion 11 in a form-fitting manner. Alternatively to the activated carbon cartridge 12, a honeycomb-shaped activated carbon monolith 20, a wound filter 21 in which activated carbon 24 is embedded, or a folded filter 22 in which activated carbon 24 is embedded may be disposed in the second accommodating portion 11 in a form-fitting manner.

[0028] That is, the illustrated compensation container 1 has a container housing 4 in which two accommodating portions 7 and 11 are arranged inside. In these accommodating portions 7 and 11, a desiccant cartridge 8, or an activated carbon cartridge 12, or a honeycomb-shaped activated carbon monolith 20, or a wound filter 21, or a folded filter 22 is arranged. In the following description of the drawings, the activated carbon cartridge 12 is mainly referred to. In this case, all descriptions shall equally apply to the activated carbon monolith 20 arranged in place of the activated carbon cartridge 12, or the wound filter 21 embedded with activated carbon 24, or the folded filter 22 embedded with activated carbon 24.

[0029] When the inside of the compensation container 1 is under excessive pressure, the air 2 thereby flows through the first valve 9 and the activated carbon cartridge 12 arranged in the second accommodating portion 11 and flows outward to the surroundings. By blowing out the air 2 through the activated carbon cartridge 12, the honeycomb-shaped activated carbon monolith 20, or the wound filter 21, or the folded filter 22, harmful substances such as hydrocarbons can be surely retained. In this case, the suction of the fresh air 2a from the surroundings into the compensation container 1 is performed through the second valve 10 and the desiccant cartridge 8, and the sucked fresh air 2a is dried in the desiccant cartridge 8. A protective cap 28 arranged at the inlet for the fresh air 2a or the outlet for the air 2 prevents the intrusion of unwanted obstacles, contaminating particles, etc.

[0030] In this case, the first valve 9 is arranged on an intermediate wall 13 that separates the second accommodating portion 11 from the inner chamber 16 of the container housing 4. In this case, the second valve 10, which may be formed as a double valve, that is, a valve permeable in both directions, is arranged on the outer wall of the container housing 4 that separates the first accommodating portion 7 from the surroundings. Naturally, on the outer wall of the container housing 4, the above-mentioned second valve 10 and another pressure relief valve may be arranged, and the air 2 is blown out from the compensation container 1 to the surroundings through the another pressure relief valve.

[0031] Continuing to refer to FIG. 3, it can be seen that one spring 14 is arranged for each of the desiccant cartridge 8 and the activated carbon cartridge 12. By means of this spring 14, it is recognized that the desiccant cartridge 8 is preloaded with respect to the container housing 4, and the activated carbon cartridge 12 is also preloaded with respect to the container housing 4, specifically with respect to the intermediate wall 13 here. By means of both springs 14, it is possible to achieve a fixed position of the desiccant cartridge 8 and the activated carbon cartridge 12 in each of the accommodating portions 7, 11 without vibration and thus without rattling. As a result, an improvement in user comfort can be achieved, especially based on the relatively low generation of noise.

[0032] The activated carbon cartridge 12 for the compensation container 1 for the battery cooling system 3 has a cartridge housing 15 provided with a pot 17 and a lid 18 movable therein like a piston. In this case, the pot bottom 25 of the pot 17 and the lid 18 are formed to be air-permeable, and are particularly covered with a woven fabric or a non-woven fabric 19 from the inside. For this reason, the lid 18 and the pot bottom 25 have an opening 27 (see FIG. 4). The non-woven fabric 19 is air-permeable and at the same time prevents the undesired outflow of the activated carbon 24 from the cartridge housing 15.

[0033] The activated carbon 24 arranged in the cartridge housing 15 may be formed as a bulk load (see FIG. 4). Alternatively, the activated carbon 24 may be formed as a honeycomb-shaped activated carbon monolith 20 (see FIG. 5), or may be embedded in a wound filter 21 (see FIG. 6) or a folded filter 22 (see FIG. 7). In the latter two cases, the cartridge housing 15 can be omitted. In this case, in FIG. 4, the activated carbon 24 may be compressed to form the activated carbon monolith 20, whereas in FIG. 6, the activated carbon 24 may be adhered to the carrier material 26 of the wound filter 21, particularly a non-woven fabric. Similarly, the activated carbon 24 may also be adhered to the carrier material 26, particularly a non-woven fabric, in the folded filter 22 shown in FIG. 7.

[0034] At the bottom 25 of the pot 17, a seal 23 for sealing against the intermediate wall 13 of the container housing 4 of the compensation container 1 is arranged. In this case, the seal 23 surrounds the breathable area at the bottom 25 of the pot. Thereby, it is achieved that the air 2 blown out from the inner chamber 16 due to the thermal expansion of the cooling medium caused by temperature is forced to flow through the activated carbon cartridge 12.

[0035] In this case, the first shell 5 and / or the second shell 6 and / or the cartridge housing 15 may be formed as injection-molded plastic parts, which enables not only high quality but also inexpensive production. In this case, the two shells 5, 6 may be welded or adhered to each other. In this case, theoretically, it is also conceivable that the two shells 5, 6 are joined to each other via a clip connection or a screw fastening. This brings the great advantage that after opening the container housing 4 to replace the desiccant cartridge 8 or the activated carbon cartridge 12 and replacing the desiccant cartridge 8 or the activated carbon cartridge 12, this container housing 4 can continue to be used.

[0036] In this case, the first shell 5 and / or the second shell 6 may be formed from polyoxymethylene (POM) or polyketone, that is, from a plastic having high strength and low hygroscopicity, which is extremely advantageous especially for the compensation container 1 for the air 2 of the battery cooling system 3. In this case, in order to further improve the strength and wear resistance of the container housing 4, the plastics of both shells 5, 6 may be reinforced with fibers, especially glass fibers.

[0037] In short, the activated carbon cartridge 12 according to the present invention, the compensation container 1 according to the present invention, and the battery cooling system 3 according to the present invention can provide a configuration that is extremely inexpensive, has an optimized configuration space, and is easy to maintain.

Claims

1. An activated carbon cartridge (12) for a compensation container (1) for a battery cooling system (3), comprising: The cartridge housing (15) comprises a pot (17) and a lid (18), the pot bottom (25) of the pot (17) and the lid (18) being made breathable and in particular covered from the inside with a woven or nonwoven fabric (19), Activated carbon (24) is disposed within the cartridge housing (15); a seal (23) arranged on the pot bottom (25) for sealing against the intermediate wall (13) of the container housing (4) of the compensation container (1); A spring (14) supported by the lid (18). Activated carbon cartridge (12).

2. The activated carbon cartridge of claim 1 , wherein the activated carbon (24) is disposed within the cartridge housing (15) as a bulk material.

3. 3. The activated carbon cartridge according to claim 1 or 2, wherein the lid (18) is movable like a piston within the pot (17).

4. 4. The activated carbon cartridge of claim 1, wherein the cartridge housing (15) is made of plastic.

5. A compensation container (1) for a battery cooling system (3), comprising: A container housing (4) made of plastic with a first shell (5) and a second shell (6) connected to the first shell (5), a first receiving portion (7) being formed in the first shell (5) and / or the second shell (6); a desiccant cartridge (8) accommodated in the first accommodation portion (7) in a form-fitting manner; a first valve (9) through which air (2) leaves the compensation vessel (1) to the surroundings in the event of overpressure prevailing in the compensation vessel (1); a second valve (10) through which fresh air (2a) flows from the surroundings into the compensation container (1) when negative pressure prevails in the compensation container (1); Equipped with A second container (11) is formed in the first shell (5) and / or the second shell (6), the second receiving portion (11) receives in a form-fitting manner an activated carbon cartridge (12) according to any one of claims 1 to 4, or a honeycomb-shaped activated carbon monolith (20), or a wound filter (21) with activated carbon (24) embedded therein, or a folded filter (22) with activated carbon (24) embedded therein; Compensation container (1).

6. 6. The compensation vessel according to claim 5, wherein the first valve (9) is arranged in an intermediate wall (13) separating the second receiving part (11) from the inner space (16) of the vessel housing (4).

7. 7. The compensation container according to claim 5 or 6, characterized in that a spring (14) is provided for preloading the desiccant cartridge (8) against the container housing (4).

8. the first shell (5) and / or the second shell (6) are formed as plastic injection moulded parts, and / or The first shell (5) and the second shell (6) are welded, clipped, screwed or glued together. Compensation vessel according to any one of claims 5 to 7.

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

10. 10. Compensation container according to claim 5, characterized in that the first shell (5) and / or the second shell (6) have a glass fibre content in plastic, in particular a glass fibre content of 25%.

11. 11. Compensation vessel according to any one of claims 5 to 10, characterized in that the second valve (10) is arranged on an outer wall of the vessel housing (4) separating the first receiving portion (7) from the surroundings.

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

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