CN219779012U - Battery cell casing, battery pack and vehicle - Google Patents

Abstract

The utility model discloses a battery cell shell, a battery pack and a vehicle, wherein the battery cell shell comprises a shell body and a baffle plate, the shell body comprises an inner shell and an outer shell, the inner shell is arranged in the outer shell and can accommodate a battery cell, an annular cavity is formed between the outer peripheral surface of the inner shell and the inner peripheral surface of the outer shell at intervals, a bottom separation cavity is formed between the outer bottom surface of the inner shell and the inner bottom surface of the outer shell at intervals, a first flow channel and a second flow channel are formed between the inner shell and the outer shell by the baffle plate, and a first liquid inlet and a first liquid outlet communicated with the first flow channel, and a second liquid inlet and a second liquid outlet communicated with the second flow channel are arranged on the outer shell. The battery core shell provided by the utility model is provided with two mutually independent flow channels, so that the battery core can be cooled together, the heat dissipation effect is improved, different operation modes can be selected according to the operation requirements of the battery, and the functional diversity of the battery thermal management system is improved.

Description

Battery cell casing, battery pack and vehicle

Technical Field

The utility model relates to the technical field of vehicles, in particular to a battery cell shell, a battery pack and a vehicle.

Background

In the related art, the battery thermal management system can radiate heat for the battery, however, the battery thermal management system in the related art has single function, and is difficult to meet the requirement for the heat radiation capability of the battery thermal management system when the battery is in a high-rate fast charging working condition and the battery core generates too high heat, and the heat radiation device in the battery thermal management system in the related art can only execute a single cooling function for the battery.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems in the related art to some extent.

Therefore, the embodiment of the utility model provides a battery cell casing, which comprises an outer casing and an inner casing arranged in the outer casing at intervals, wherein a partition plate is arranged between the inner casing and the outer casing and can form a first flow passage and a second flow passage with the inner casing and the outer casing, two independent flow passages can form two groups of heat management systems, the battery cells can be cooled together, the heat dissipation effect is improved, different operation modes can be selected according to the operation requirement of the battery, such as when the battery operates in a low-temperature environment, one flow passage can heat the battery to realize low-temperature starting of the battery, and the other flow passage can cool the battery cell to improve the functional diversity of the battery heat management system.

The embodiment of the utility model also provides a battery pack.

The novel embodiment of the use also provides a vehicle.

The battery cell casing of the embodiment of the utility model comprises: the shell comprises an inner shell and an outer shell, the inner shell is arranged in the outer shell and can accommodate the battery cell, an annular cavity is formed between the outer peripheral surface of the inner shell and the inner peripheral surface of the outer shell at intervals, and a bottom interval cavity is formed between the outer bottom surface of the inner shell and the inner bottom surface of the outer shell at intervals; the baffle, the baffle presss from both sides to be established the inner shell with between the shell, just the baffle is in the inner shell with construct first runner and second runner between the shell, be equipped with first inlet, second inlet, first liquid outlet and second liquid outlet on the shell, the both ends of first runner communicate respectively first inlet with first liquid outlet, the both ends of second runner communicate respectively the second inlet with the second liquid outlet.

According to the battery cell shell, the partition plate is arranged between the inner shell and the outer shell and constructs the first flow channel and the second flow channel, so that two independent flow channels are constructed in the battery cell shell, the battery cell can be cooled together, the heat dissipation effect is improved, different operation modes can be selected according to the operation requirement of the battery, for example, when the battery operates in a low-temperature environment, one flow channel can heat the battery, low-temperature starting of the battery is achieved, the other flow channel can cool the battery cell, and the functional diversity of the battery thermal management system is improved.

In some embodiments, at least a portion of the first flow passage flows through the bottom compartment and at least a portion of the first flow passage flows through the annular cavity; and/or at least part of the second flow passage flows through the bottom compartment and at least part of the second flow passage flows through the annular cavity.

In some embodiments, the inner shell is a rectangular shell, the partition plate comprises end plates located at two ends of the inner shell, side plates located at two sides of the inner shell and a bottom plate located at the bottom of the inner shell, the side plates are provided with a plurality of first lateral flow channels which are arranged at intervals in the height direction of the inner shell and extend in the length direction of the inner shell, the bottom plate is provided with a plurality of first bottom flow channels which are arranged at intervals in the width direction of the inner shell and extend in the length direction of the inner shell, the end plates are provided with first longitudinal flow channels which extend in the height direction of the inner shell, the first longitudinal flow channels are communicated with the first lateral flow channels and the first bottom flow channels, and the first longitudinal flow channels located at two ends of the inner shell are respectively communicated with the first liquid inlet and the first liquid outlet.

In some embodiments, the two ends of the inner shell are further provided with collecting fins, the collecting fins construct second longitudinal flow channels extending along the height direction of the inner shell in the annular cavity, the side plates construct a plurality of second lateral flow channels arranged at intervals along the height direction of the inner shell and extending along the length direction of the inner shell in the annular cavity, the bottom plate constructs a plurality of second bottom flow channels arranged at intervals along the width direction of the inner shell and extending along the length direction of the inner shell in the bottom partition cavity, the second longitudinal flow channels are communicated with the second lateral flow channels and the second bottom flow channels, and the second longitudinal flow channels at the two ends of the inner shell are respectively communicated with the second liquid inlet and the second liquid outlet.

In some embodiments, the end plate further includes a plurality of first flow dividing channels arranged at intervals along the height direction of the inner shell, one ends of the first flow dividing channels are communicated with the first longitudinal channels, and the other ends thereof are correspondingly communicated with the first side flow channels; and/or, the end plate further comprises second flow dividing channels which are arranged at intervals along the width direction of the inner shell, one ends of the second flow dividing channels are communicated with the first longitudinal channels, and the other ends of the second flow dividing channels are correspondingly communicated with the first bottom channels.

In some embodiments, the collecting fin further includes a plurality of third flow-dividing channels arranged at intervals along the height direction of the inner case, one ends of the third flow-dividing channels are communicated with the second longitudinal flow channels, and the other ends thereof are correspondingly communicated with the second lateral flow channels; and/or, the current collecting fin further comprises fourth flow dividing channels which are arranged at intervals along the width direction of the inner shell, one ends of the fourth flow dividing channels are communicated with the second longitudinal flow channels, and the other ends of the fourth flow dividing channels are correspondingly communicated with the second bottom flow channels.

In some embodiments, the partition has a receiving cavity, the inner housing is disposed in the receiving cavity, and the outer side of the partition and the outer housing form the second flow channel.

In some embodiments, the inner wall surface of the inner case includes a first inner wall surface, the outer wall surface of the outer case includes a first outer wall surface opposite to and spaced apart from the first inner wall surface, a spacing dimension of the first inner wall surface and the first outer wall surface is D, and a dimension of the partition plate in an arrangement direction of the first inner wall surface and the first outer wall surface is D, 0.25 < D/D < 1.

The battery pack provided by the embodiment of the utility model comprises a battery cell shell and a battery cell, wherein the battery cell shell is the battery cell shell described in the embodiment.

According to the battery pack provided by the embodiment of the utility model, the battery cell shell is adopted, the partition plate is provided with the first flow channel, and the second flow channel is formed between the inner shell and the outer shell, so that the two independent flow channels are formed in the battery cell shell, the battery cells can be cooled together, the heat dissipation effect is improved, different operation modes can be selected according to the operation requirement of the battery, such as when the battery operates in a low-temperature environment, one flow channel can heat the battery, the low-temperature start of the battery is realized, the other flow channel can cool the battery cells, and the functional diversity of the battery thermal management system is improved.

The vehicle of the embodiment of the utility model comprises the battery pack of the embodiment.

By adopting the battery pack, the vehicle provided by the embodiment of the utility model has long endurance time, good performance and high driving safety.

Drawings

Fig. 1 is a schematic structural view of a battery cell casing according to an embodiment of the present utility model;

fig. 2 is an assembly view of a cell housing according to an embodiment of the present utility model;

FIG. 3 is an exploded view of a cell housing according to an embodiment of the present utility model;

fig. 4 is a cross-sectional view of a cell housing according to an embodiment of the present utility model;

fig. 5 is a schematic structural view of an end plate of a cell housing according to an embodiment of the present utility model;

fig. 6 is a schematic structural view of a current collecting fin of a cell case according to an embodiment of the present utility model;

fig. 7 is a cross-sectional view of a cell housing according to an embodiment of the present utility model.

Reference numerals:

the housing 100, the inner housing 1, the outer housing 2, the first liquid inlet 21, the first liquid outlet 22, the second liquid inlet 23, the second liquid outlet 24, the partition plate 3, the end plate 31, the side plate 32, the bottom plate 33, the collecting fin 34, the second flow channel 4, the second lateral flow channel 41, the second longitudinal flow channel 42, the second bottom flow channel 44, the third flow distribution channel 45, the fourth flow distribution channel 46, the battery cell 5, the top cover 6, the first flow channel 7, the first lateral flow channel 71, and the first bottom flow channel 72.

Detailed Description

Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

As shown in fig. 1 to 7, the cell case of the embodiment of the present utility model includes a case 100 and a separator 3.

Specifically, as shown in fig. 1-7, the casing 100 includes an inner casing 1 and an outer casing 2, the inner casing 1 is disposed in the outer casing 2, the inner casing 1 can accommodate the battery cell 5, an annular cavity is formed between an outer peripheral surface of the inner casing 1 and an inner peripheral surface of the outer casing 2, a bottom separation cavity is formed between an outer bottom surface of the inner casing 1 and an inner bottom surface of the outer casing 2, the partition plate 3 is sandwiched between the inner casing 1 and the outer casing 2, the partition plate 3 forms a first fluid channel 7 and a second fluid channel 4 between the inner casing 1 and the outer casing 2, a first fluid inlet 21, a second fluid inlet 23, a first fluid outlet 22 and a second fluid outlet 24 are disposed on the outer casing 2, two ends of the first fluid channel 7 are respectively communicated with the first fluid inlet 21 and the first fluid outlet 22, and two ends of the second fluid channel 4 are respectively communicated with the second fluid inlet 23 and the second fluid outlet 24.

In other words, the flow channels of the partition board 3 can form one group of heat management systems, the flow channels formed by the partition board 3, the inner shell 1 and the outer shell 2 can form another group of heat management systems, the two groups of heat management systems are mutually independent, one group of heat management systems can be selected to be put into operation when the heat dissipation is conducted under the normal working condition of the battery, and when the battery is charged quickly and the battery core 5 generates a large amount of heat, the two groups of heat management systems are put into operation, so that the whole heat dissipation capacity is improved.

In addition, the battery may have different requirements for the thermal management systems under different conditions, for example, when the battery is operated in a low temperature environment, one set of thermal management systems may be adjusted to a heating mode to heat the battery cells 5 to achieve low temperature startup of the battery, and another set of thermal management systems may be used to cool the battery. That is, the cell housing of the present utility model includes two sets of thermal management systems that may have the same function, for example, both may function as cooling systems to enhance heat dissipation, or may have different functions, such as one as a cooling system and the other as a heating system.

It should be noted that, when the two sets of thermal management systems have different functions, the two sets of thermal management systems are not limited to one set of thermal management systems as a cooling system and the other set of thermal management systems as a heating system, and may also include various forms with different functions, for example, when the cooling media flowing through the flow channels of the two sets of thermal management systems are different, the two sets of thermal management systems may also be considered to have different functions.

According to the battery cell casing provided by the embodiment of the utility model, the partition plate 3 is arranged between the inner casing 1 and the outer casing 2 to form the first flow passage 7 and the second flow passage 4, so that two independent flow passages are formed in the battery cell casing, the battery cell 5 can be cooled together, the heat dissipation effect is improved, different operation modes can be selected according to the operation requirement of the battery, such as when the battery operates in a low-temperature environment, one flow passage can heat the battery to realize low-temperature starting of the battery, the other flow passage can cool the battery cell 5, and the functional diversity of the battery thermal management system is improved.

Preferably, at least part of the first flow channel 7 flows through the bottom compartment and at least part of the first flow channel 7 flows through the annular cavity, at least part of the second flow channel 4 flows through the bottom compartment and at least part of the second flow channel 4 flows through the annular cavity. The first flow channel 7 and the second flow channel 4 are arranged at intervals in the annular cavity, and the first flow channel 7 and the second flow channel 4 are not communicated with each other.

It will be appreciated that, taking the flow of the cooling liquid in the first flow channel 7 as an example, the cooling liquid introduced by the first liquid inlet 21 may flow along the first flow channel 7 and be discharged from the first liquid outlet 22, in this process, since part of the first flow channel 7 flows through the annular cavity, the outer peripheral plate of the inner shell 1 may serve as a heat conducting plate to directly transfer the heat of the battery cell 5 to the cooling liquid, and since part of the first flow channel 7 flows through the bottom compartment, the bottom wall plate of the inner shell 1 may also serve as a leading plate to directly transfer the heat of the battery cell 5 to the cooling liquid, thus, compared with the conventional heat dissipation system, the battery cell housing of the present utility model only has the heat dissipation flow channel arranged on the peripheral surface or the bottom surface of the battery cell 5, thereby increasing the heat dissipation area of the battery cell 5 and improving the heat dissipation capability.

Further, as shown in fig. 1 to 7, the inner casing 1 is a rectangular casing 100, the partition plate 3 includes end plates 31 at both ends of the casing 100, side plates 32 at both sides of the casing 100, and a bottom plate 33 at the bottom of the inner casing 1, the side plates 32 have a plurality of first side flow passages 71 spaced apart in the height direction of the inner casing 1 and extending in the length direction of the inner casing 1, the bottom plate 33 has a plurality of first bottom flow passages 72 spaced apart in the width direction of the inner casing 1 and extending in the length direction of the inner casing 1, the end plates 31 have first longitudinal flow passages extending in the height direction of the inner casing 1, the first longitudinal flow passages are in communication with both the first side flow passages 71 and the first bottom flow passages 72, and the first longitudinal flow passages at both ends of the inner casing 1 are in communication with the first liquid inlet 21 and the first liquid outlet 22, respectively.

In other words, the cell housing of the present utility model can meet the circulation requirement of the first fluid channel 7 only by providing one first fluid inlet 21 and one first fluid outlet 22, specifically, the first longitudinal fluid channel can perform the effect of centralized fluid distribution, the first fluid inlet 21 supplies fluid to the first longitudinal fluid channel at one end of the inner housing 1, the first longitudinal fluid channel respectively distributes fluid to the plurality of first side fluid channels 71 and the plurality of first bottom fluid channels 72, and the cooling fluid flowing out of the plurality of first side fluid channels 71 and the plurality of first bottom fluid channels 72 can be centralized again to the first longitudinal fluid channel at the other end of the inner housing 1 and finally flows out through the first fluid outlet 22, thereby, the layout of the fluid channels can be simplified by utilizing the centralized fluid distribution of the first longitudinal fluid channel, and the difficulty of production and manufacture can be reduced.

It will be appreciated that the rectangular inner housing 1 conforms to the conventional housing 100 configuration of the battery cell 5, is convenient to be assembled with the battery cell 5 perfectly, and the first bottom runner 72 and the first side runner 71 extend along the long sides of the rectangle, so that the first bottom runner 72 and the first side runner 71 can be fully paved with the gaps while the number of runners is reduced.

Optionally, the end plate 31 further includes a plurality of first flow dividing channels spaced apart along the height direction of the inner casing 1, and one ends of the plurality of first flow dividing channels are communicated with the first longitudinal flow channels, and the other ends thereof are correspondingly communicated with the plurality of first lateral flow channels 71. That is, the first longitudinal flow channels can uniformly distribute liquid to the plurality of first lateral flow channels 71 through the plurality of first flow distributing channels.

Optionally, the end plate 31 further includes second flow dividing channels arranged at intervals along the width direction of the inner case 1, and one ends of the plurality of second flow dividing channels communicate with the first longitudinal flow channels, and the other ends correspondingly communicate with the plurality of first bottom flow channels 72. That is, the first longitudinal flow channels may evenly distribute liquid through the plurality of second flow diversion channels to the plurality of first bottom flow channels 72.

In some embodiments, as shown in fig. 3, the two ends of the inner shell 1 are further provided with collecting fins 34, the collecting fins 34 form second longitudinal flow channels 42 extending along the height direction of the inner shell 1 in the annular cavity, the side plates 32 form a plurality of second lateral flow channels 41 spaced along the height direction of the inner shell 1 and extending along the length direction of the inner shell 1 in the annular cavity, the bottom plate 33 forms a plurality of second bottom flow channels 44 spaced along the width direction of the inner shell 1 and extending along the length direction of the inner shell 1 in the bottom partition cavity, the second longitudinal flow channels 42 are communicated with the second lateral flow channels 41 and the second bottom flow channels 44, and the second longitudinal flow channels 42 at the two ends of the inner shell 1 are respectively communicated with the second liquid inlet 23 and the second liquid outlet 24.

In other words, the cell housing of the present utility model only needs to provide a second liquid inlet 23 and a second liquid outlet 24 to meet the circulation requirement of the second flow channel 4. For the specific principle reference is made to the circulation of the cooling liquid in the first flow channel 7, which is not described in detail here.

Further, the collecting fin 34 further includes a plurality of third flow distribution channels 45 spaced apart along the height direction of the inner case 1, and one ends of the plurality of third flow distribution channels 45 are connected to the second longitudinal channels 42, and the other ends thereof are correspondingly connected to the plurality of second lateral channels 41. That is, the second longitudinal flow channels 42 can uniformly distribute liquid to the plurality of second lateral flow channels 41 through the plurality of third flow distribution channels 45.

Further, the collecting fin 34 further includes fourth flow dividing passages 46 arranged at intervals in the width direction of the inner case 1, one ends of the fourth flow dividing passages 46 communicate with the second longitudinal flow passages 42, and the other ends correspondingly communicate with the second bottom flow passages 44. That is, the second longitudinal flow channels 42 can evenly distribute liquid to the plurality of second bottom flow channels 44 through the plurality of fourth flow distribution channels 46.

In some embodiments, as shown in fig. 1-7, the partition 3 has a receiving cavity, the inner housing 1 is disposed in the receiving cavity, and the outer side of the partition 3 and the outer housing 2 form a second flow channel 4. In other words, the partition plate 3 is an integral structure, and the structural member can accommodate the inner shell 1, and when the assembly is performed, only the partition plate 3, the inner shell 1 and the outer shell 2 are required to be assembled and then connected by welding or gluing, so that the assembly and the disassembly are convenient.

It should be noted that, the heat dissipation effect of the battery cell 5 is related to the flow rate and the flow velocity of the cooling liquid, the larger the flow velocity and the flow velocity, the better the heat dissipation effect, but the flow rate and the flow velocity are both related to the arrangement type of the flow channels, it can be understood that the larger the flow channel size is, the larger the flow rate is, but the corresponding flow velocity is reduced, therefore, how to reasonably set the size of the flow channel to consider the flow rate and the flow velocity is an important research direction for improving the heat dissipation effect of the battery cell 5.

Specifically, the inner wall surface of the inner case 1 includes a first inner wall surface, the outer wall surface of the outer case 2 includes a first outer wall surface opposed to and spaced apart from the first inner wall surface, the spacing dimension of the first inner wall surface and the first outer wall surface is D, and the dimension of the partition plate 3 in the arrangement direction of the first inner wall surface and the first outer wall surface is D, 0.25 < D/D < 1. It will be appreciated that D is understood to be the width of the partition 3 in the spacer cavity (the annular cavity and the bottom spacer cavity), and that the larger D is, the larger the depth dimension of the flow channel is, the more the relative depth of the flow channel can be reasonably set by reasonably selecting the value of D/D, so that the partition 3 has the maximum heat dissipation capability.

Further, in order to ensure the heat dissipation effect, after the assembly of the battery cell 5 is completed, the area of any one of the outer wall surfaces of the battery cell 5 is defined as S, and the laying area of the partition plate 3 opposite to the outer wall surface is defined as S, and 0.01 < S/S < 3. Therefore, by reasonably setting the paving area of the partition plate 3, the material waste caused by overlarge paving area can be avoided, and the defect of insufficient paving area can be avoided, so that the heat dissipation effect is reduced.

Alternatively, the thickness dimension of the spacer 3 is T, then 0.01mm < T < 25mm.

Optionally, the cell housing further comprises a top cover 6, the top cover 6 may close the opening of the inner housing 1 to conceal the cells 5 within the housing 100. The battery pack of the embodiment of the utility model comprises a battery cell shell and a battery cell 5, wherein the battery cell shell is the battery cell shell of the embodiment.

According to the battery pack provided by the embodiment of the utility model, the battery cell shell is adopted, the partition plate 3 is arranged between the inner shell 1 and the outer shell 2 and constructs the first flow passage 7 and the second flow passage 4, so that two independent flow passages are constructed in the battery cell shell, the battery cell 5 can be cooled together, the heat dissipation effect is improved, different operation modes can be selected according to the operation requirement of the battery, for example, when the battery is operated in a low-temperature environment, one flow passage can heat the battery, the low-temperature starting of the battery is realized, the other flow passage can cool the battery cell 5, and the functional diversity of the battery thermal management system is improved.

The vehicle of the embodiment of the utility model includes the battery pack of the above embodiment.

By adopting the battery pack, the vehicle provided by the embodiment of the utility model has long endurance time, good performance and high driving safety.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (10)

1. A cell housing comprising:

the shell comprises an inner shell and an outer shell, the inner shell is arranged in the outer shell and can accommodate the battery cell, an annular cavity is formed between the outer peripheral surface of the inner shell and the inner peripheral surface of the outer shell at intervals, and a bottom interval cavity is formed between the outer bottom surface of the inner shell and the inner bottom surface of the outer shell at intervals;

the baffle, the baffle presss from both sides to be established the inner shell with between the shell, just the baffle is in the inner shell with construct first runner and second runner between the shell, be equipped with first inlet, second inlet, first liquid outlet and second liquid outlet on the shell, the both ends of first runner communicate respectively first inlet with first liquid outlet, the both ends of second runner communicate respectively the second inlet with the second liquid outlet.

2. The cell housing of claim 1, wherein at least a portion of the first flow channel flows through the bottom compartment and at least a portion of the first flow channel flows through the annular cavity; and/or at least part of the second flow passage flows through the bottom compartment and at least part of the second flow passage flows through the annular cavity.

3. The cell housing of claim 2, wherein the inner housing is a rectangular housing, the partition plate includes end plates at both ends of the inner housing, side plates at both sides of the inner housing, and a bottom plate at the bottom of the inner housing, the side plates have a plurality of first side flow channels spaced apart in a height direction of the inner housing and extending in a length direction of the inner housing, the bottom plate has a plurality of first bottom flow channels spaced apart in a width direction of the inner housing and extending in a length direction of the inner housing, the end plates have first longitudinal flow channels extending in a height direction of the inner housing, the first longitudinal flow channels are in communication with both the first side flow channels and the first bottom flow channels, and the first longitudinal flow channels at both ends of the inner housing are in communication with the first liquid inlet and the first liquid outlet, respectively.

4. The cell casing according to claim 3, wherein the two ends of the inner casing are further provided with current collecting fins, the current collecting fins construct second longitudinal flow channels extending along the height direction of the inner casing in the annular cavity, the side plates construct a plurality of second lateral flow channels arranged at intervals along the height direction of the inner casing and extending along the length direction of the inner casing in the annular cavity, the bottom plate constructs a plurality of second bottom flow channels arranged at intervals along the width direction of the inner casing and extending along the length direction of the inner casing in the bottom partition cavity, the second longitudinal flow channels are communicated with the second lateral flow channels and the second bottom flow channels, and the second longitudinal flow channels at the two ends of the inner casing are respectively communicated with the second liquid inlet and the second liquid outlet.

5. The cell housing of claim 3, wherein the end plate further comprises a plurality of first flow dividing channels arranged at intervals along the height direction of the inner housing, one ends of the first flow dividing channels are communicated with the first longitudinal flow channels, and the other ends thereof are correspondingly communicated with the first side flow channels;

and/or, the end plate further comprises second flow dividing channels which are arranged at intervals along the width direction of the inner shell, one ends of the second flow dividing channels are communicated with the first longitudinal channels, and the other ends of the second flow dividing channels are correspondingly communicated with the first bottom channels.

6. The cell housing of claim 4, wherein the current collecting fin further comprises a plurality of third flow dividing channels arranged at intervals along the height direction of the inner housing, one ends of the third flow dividing channels are communicated with the second longitudinal flow channels, and the other ends thereof are correspondingly communicated with the second lateral flow channels;

and/or, the current collecting fin further comprises fourth flow dividing channels which are arranged at intervals along the width direction of the inner shell, one ends of the fourth flow dividing channels are communicated with the second longitudinal flow channels, and the other ends of the fourth flow dividing channels are correspondingly communicated with the second bottom flow channels.

7. The cell housing of any one of claims 1-6, wherein the separator has a receiving cavity, the inner housing is disposed within the receiving cavity, and an outer side of the separator and the outer housing define the second flow path.

8. The cell housing of claim 1, wherein the inner wall surface of the inner case includes a first inner wall surface, the outer wall surface of the outer case includes a first outer wall surface opposite to and spaced apart from the first inner wall surface, a spacing dimension of the first inner wall surface and the first outer wall surface is D, and a dimension of the separator in an arrangement direction of the first inner wall surface and the first outer wall surface is D, 0.25 < D/D < 1.

9. A battery pack comprising a cell housing and a cell, the cell housing being in accordance with any one of claims 1-8, the cell being disposed within the inner housing.

10. A vehicle comprising the battery pack according to claim 9.