Battery Pack and Vehicle

Abstract

The utility model discloses a battery pack and a vehicle, wherein the battery pack includes a battery cell module and a box body, wherein the battery cell module includes at least one row of battery cells arranged along a first direction, the box body has a receiving cavity, the bottom wall of the receiving cavity has a partition protruding toward the battery cell module, the partition and the bottom wall of the receiving cavity enclose at least one liquid storage flow channel, the liquid storage flow channel extends along the first direction and is open toward the battery cell module, wherein the battery cell module is arranged in the receiving cavity, and the end face where the pole of the battery cell is located faces the bottom wall of the receiving cavity, and both sides of the end face of each battery cell facing the bottom wall are sealed and contacted with the partition respectively, and the pole of each battery cell extends into the liquid storage flow channel. The battery pack of the utility model uses the partition formed on the bottom wall to construct an independent liquid storage flow channel, realizes dry and wet separation, and ensures that the components in the battery pack are compatible with the coolant.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, and in particular to a battery pack and a vehicle. Background Art

[0002] With the rapid development of thermal management technology for battery energy storage, the cooling method has gradually shifted from air cooling to liquid cooling. Among the liquid cooling methods, there are two cooling methods: liquid cooling plate and immersion. There are many problems with the liquid cooling plate in cooling the poles and bars of the battery cells. For example, the expansion of the battery cell will cause the liquid cooling plate and the bar to misalign, thermal runaway can easily lead to leakage of the liquid cooling plate, and condensation of the liquid cooling plate, bar and poles causes insulation problems. Secondly, the heat exchange between the poles, bars and coolant needs to pass through the cooling plate, and the heat exchange effect is relatively poor. In addition, the setting of the liquid cooling plate will take up a lot of space and does not use the battery pack to achieve miniaturization.

[0003] The immersion cooling method allows the coolant to directly contact the poles and bars for better cooling and heat dissipation, while solving many problems with liquid cooling plates. However, when the immersion cooling method is used to cool the poles and bars in the related technology, dry and wet separation is not achieved, and there are compatibility issues between the components in the battery pack and the coolant, as well as maintenance difficulties. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] The technical solution of the utility model provides a battery pack, in which a cell module of the battery pack is inverted in a accommodating cavity of a box body, and the bottom wall of the accommodating cavity has a partition protruding toward the cell module, and the partition is in sealing contact with the end face of the cell module facing the bottom wall of the accommodating cavity to form a liquid storage flow channel, and the pole of the battery cell extends into the liquid storage flow channel, thereby, the partition, the bottom wall of the box body and the cell module can constitute an independent liquid storage flow channel, and the coolant located in the liquid storage flow channel will not leak to other areas of the battery pack, thereby realizing dry-wet separation, ensuring that the components in the battery pack are compatible with the coolant, and because the coolant is restricted to remain in the partition, the coolant will not leak when the components in the battery pack are repaired, thereby ensuring the feasibility and convenience of repair.

[0006] The battery pack of the utility model embodiment includes: a battery cell module, the battery cell module includes at least one row of battery cells arranged along a first direction; a box body, the box body has a accommodating cavity, the bottom wall of the accommodating cavity has a partition protruding toward the battery cell module, the partition and the bottom wall of the accommodating cavity form at least one liquid storage channel, the liquid storage channel extends along the first direction and is open toward the battery cell module; wherein the battery cell module is arranged in the accommodating cavity, and the end surface where the pole of the battery cell is located faces the bottom wall of the accommodating cavity, both sides of the end surface of each battery cell facing the bottom wall are respectively in sealing contact with the partition, and the pole of each battery cell extends into the liquid storage channel.

[0007] In the battery pack of the utility model embodiment, the battery cell module includes at least one row of battery cells arranged along a first direction, the box body has a accommodating cavity, the bottom wall of the accommodating cavity has a partition protruding toward the battery cell module, the partition and the bottom wall of the accommodating cavity form at least one liquid storage flow channel, the liquid storage flow channel extends along the first direction and is open toward the battery cell module, the battery cell module is arranged in the accommodating cavity, and the end surface where the pole of the battery cell is located faces the bottom wall of the accommodating cavity, both sides of the end surface of each battery cell facing the bottom wall are respectively in sealing contact with the partition, and the pole of each battery cell extends into the liquid storage flow channel, thereby, the partition, the bottom wall of the box body and the battery cell module can constitute an independent liquid storage flow channel, the coolant located in the liquid storage flow channel will not leak to other areas of the battery pack, thereby realizing dry and wet separation, ensuring that the components in the battery pack are compatible with the coolant, and because the coolant is restricted to remain in the partition, when the components in the battery pack are repaired, the coolant will not leak, thereby ensuring the feasibility and convenience of repair.

[0008] In some embodiments, the partition includes an annular outer partition and multiple inner partitions, the multiple inner partitions are arranged in the annular outer partition at intervals along the second direction and extend along the first direction, the annular outer partition, the multiple inner partitions and the bottom wall of the accommodating cavity form multiple liquid storage channels, the battery cell module includes multiple rows of battery cells arranged along the second direction, each of the liquid storage channels corresponds to a row of the battery cells, and the second direction is perpendicular to the first direction.

[0009] In some embodiments, there is a gap between both ends of each inner partition and the annular outer partition.

[0010] In some embodiments, the battery pack further includes a sealing strip, which is sandwiched between the partition and an end surface of the battery cell facing the bottom wall of the accommodating cavity.

[0011] In some embodiments, a tab is connected to the end surface of the pole of each of the battery cells that faces the bottom wall of the accommodating cavity, and at least a portion of the tab extends into the liquid storage channel.

[0012] In some embodiments, the battery pack also includes a top liquid cooling plate and a connecting pipe, wherein the top liquid cooling plate is connected at the opening of the accommodating cavity and contacts the end surface of the battery cell module facing away from the bottom wall, and the connecting pipe is connected between the top liquid cooling plate and the liquid storage channel.

[0013] In some embodiments, a water inlet and a water outlet are provided on the annular outer partition, both ends of the plurality of inner partitions are separated from the annular outer partition, and the top liquid cooling plate is connected to the water inlet via a connecting pipe.

[0014] In some embodiments, the battery pack further includes a liquid inlet pipeline and a liquid return pipeline, the liquid inlet pipeline connects the top liquid cooling plate and one of the liquid storage channels, the liquid return pipeline connects the top liquid cooling plate and the other of the liquid storage channels, and the liquid inlet pipeline and the liquid return pipeline are integrated into one.

[0015] In some embodiments, in the first direction, the connecting pipeline is located on one side of the battery cell module, and the liquid inlet pipeline and the liquid return pipeline are located on the other side of the battery cell module.

[0016] The vehicle of the embodiment of the utility model includes the battery pack described in the above embodiment.

[0017] The vehicle of the embodiment of the utility model adopts the above-mentioned battery pack, the battery cell module includes at least one row of battery cells arranged along the first direction, the box body has a accommodating cavity, the bottom wall of the accommodating cavity has a partition protruding toward the battery cell module, the partition and the bottom wall of the accommodating cavity form at least one liquid storage flow channel, the liquid storage flow channel extends along the first direction and is open toward the battery cell module, the battery cell module is arranged in the accommodating cavity, and the end surface where the pole of the battery cell is located faces the bottom wall of the accommodating cavity, both sides of the end surface of each battery cell facing the bottom wall are respectively in sealing contact with the partition, and the pole of each battery cell extends into the liquid storage flow channel, thereby, the partition, the bottom wall of the box body and the battery cell module can constitute an independent liquid storage flow channel, the coolant located in the liquid storage flow channel will not leak to other areas of the battery pack, thereby realizing dry and wet separation, ensuring that the components in the battery pack are compatible with the coolant, and because the coolant is restricted to remain in the partition, when the components in the battery pack are repaired, the coolant will not leak, thereby ensuring the feasibility and convenience of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an exploded view of the battery pack of the embodiment of the present utility model.

[0019] Figure 2 It is a schematic diagram of an inverted battery cell of a battery pack according to an embodiment of the utility model.

[0020] Figure 3It is a schematic structural diagram of the bottom guard plate of the battery pack according to an embodiment of the utility model.

[0021] Figure 4 It is a cross-sectional view of a battery pack according to an embodiment of the present utility model.

[0022] Figure 5 It is a schematic diagram of the structure of the battery pack of an embodiment of the utility model, wherein the layout of the liquid inlet pipeline and the liquid return pipeline is shown.

[0023] Figure 6 It is a schematic diagram of the structure of the battery pack of an embodiment of the utility model, wherein the layout of the connecting pipes is shown.

[0024] Reference numerals:

[0025] Box body 1, bottom guard plate 11, liquid storage channel 111, peripheral plate 12, top liquid cooling plate 2, battery cell module 3, pole 31, bar plate 32, liquid inlet pipeline 4, liquid return pipeline 5, connecting pipeline 6, partition 7, first end plate 71, second end plate 72, water inlet 73, water outlet 74, explosion-proof valve 75, annular outer partition plate 76, inner partition plate 8, thermal conductive glue 8, faucet 10, sealing strip 11, sealing gasket 12, battery energy distribution unit 13. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0027] like Figure 1-Figure 6 As shown, the battery pack of the present invention includes a box body 1 and a battery cell module 3 .

[0028] Specifically, the battery cell module 3 includes at least one row of battery cells arranged along the first direction. In other words, the battery cells can be arranged in one row or multiple rows to form a battery cell module 3 such as a rectangular shape. The box body 1 has a receiving cavity, and the bottom wall of the receiving cavity has a partition 7 protruding toward the battery cell module 3. The partition 7 and the bottom wall of the receiving cavity enclose at least one liquid storage channel 111, and the liquid storage channel 111 extends along the first direction and is open toward the battery cell module 3. Among them, the battery cell module 3 is arranged in the receiving cavity, and the end face where the pole 31 of the battery cell is located faces the bottom wall of the receiving cavity. Both sides of the end face of each battery cell facing the bottom wall are sealed and contacted with the partition 7 respectively, and the pole 31 of each battery cell extends into the liquid storage channel 111.

[0029] Specifically, Figure 1As shown, the box body 1 includes a bottom guard plate 11 and a peripheral plate 12 detachably connected to the bottom guard plate 11, the peripheral plate 12 and the bottom guard plate 11 form a accommodating cavity, the end surface of the bottom guard plate 11 facing the accommodating cavity is constructed as the bottom wall of the accommodating cavity, and a sealing gasket 12 is arranged between the bottom guard plate 11 and the peripheral plate 12. After the battery module 3 is inverted, the pole 31 of the battery cell faces the bottom guard plate 11, and after the coolant is passed into the liquid storage channel 111, the coolant can directly contact the pole 31 to cool the pole 31. Compared with the traditional cooling method using a liquid cooling plate and the pole 31, the immersion cooling is more direct and has a better cooling effect, and solves the problems of position dislocation, breakage, and coolant leakage of the liquid cooling plate when the battery cell expands or thermally runs away.

[0030] In addition, the box body 1 is composed of a detachably connected bottom guard plate 11 and the box body 1. When the battery pack needs to be repaired, it is only necessary to remove the bottom guard plate 11, which is easy to operate.

[0031] Furthermore, since the partition 7 is in sealed contact with the battery module 3, after the battery module 3 is assembled, the partition 7, the battery module 3 and the box body 1 can form a closed liquid storage channel 111, and the coolant in the liquid storage channel 111 will not leak to other areas of the battery pack, achieving dry and wet separation, ensuring that the components in the battery pack are compatible with the coolant, and because the coolant is restricted to remain in the annular partition 7, when the components in the battery pack are repaired, the coolant will not leak, ensuring the feasibility and convenience of the repair. For example, Figure 1 As shown, the battery energy distribution unit 13 of the battery pack is located on the outside of the partition 7 , and the coolant will not soak the battery energy distribution unit 13 .

[0032] In the battery pack of the utility model embodiment, the battery cell module 3 includes at least one row of battery cells arranged along the first direction, the box body 1 has a receiving cavity, the bottom wall of the receiving cavity has a partition 7 protruding toward the battery cell module 3, the partition 7 and the bottom wall of the receiving cavity enclose at least one liquid storage channel 111, the liquid storage channel 111 extends along the first direction and is open toward the battery cell module 3, the battery cell module 3 is arranged in the receiving cavity, and the end face where the pole 31 of the battery cell is located faces the bottom wall of the receiving cavity, and the two sides of the end face of each battery cell facing the bottom wall are respectively connected to the partition 7 Sealed contact, and the pole 31 of each battery cell extends into the liquid storage channel 111, thereby, the partition 7 and the bottom wall of the box body and the battery cell module 3 can form an independent liquid storage channel 111, and the coolant in the liquid storage channel 111 will not leak to other areas of the battery pack, thereby achieving dry and wet separation, ensuring that the components in the battery pack are compatible with the coolant, and because the coolant is restricted to remain in the partition 7, when the components in the battery pack are repaired, the coolant will not leak, thereby ensuring the feasibility and convenience of maintenance.

[0033] Furthermore, if Figure 3As shown, the partition 7 includes an annular outer partition 76 and multiple inner partitions 8, and the multiple inner partitions 8 are arranged in the annular outer partition 76 at intervals along the second direction and extend along the first direction. The annular outer partition 76, the multiple inner partitions 8 and the bottom wall of the accommodating cavity form multiple liquid storage channels 111. The battery module 3 includes multiple rows of battery cells arranged along the second direction, and each liquid storage channel 111 corresponds to a row of battery cells. The second direction is perpendicular to the first direction. Therefore, the annular outer partition 76 can limit the coolant to an independent area to prevent the coolant from leaking out and realize dry-wet separation. The multiple liquid storage channels 111 formed by the multiple inner partitions 8 can guide the coolant to make the coolant have better fluidity, thereby improving the heat exchange effect of the coolant. The multiple liquid storage channels 111 can achieve uniform cooling of multiple rows of battery cells, improve the temperature uniformity of the battery pack, and thereby improve the performance and service life of the battery pack.

[0034] Optionally, the partition 7 may be an annular plate extending along the first direction, the inner cavity of the annular plate being a liquid storage channel 111. Specifically, a corresponding number of partitions 7 may be set according to the number of columns of battery cells, and the liquid storage channel 111 of each partition 7 is used to cool the poles of a corresponding column of battery cells.

[0035] In some embodiments, each inner baffle 8 has a gap between both ends and the annular outer baffle 76. It is understandable that, due to the gap between the inner baffle 8 and the outer baffle, the multiple liquid storage channels 111 are interconnected, and thus, only one water inlet 73 and one water outlet 74 need to be provided on the annular outer baffle 76 to meet the cooling liquid circulation requirements in the multiple liquid storage channels 111, so that there is no need to provide a corresponding water inlet 73 and water outlet 74 for each liquid storage channel 111, thereby reducing the number of pipeline layouts and the difficulty of production and manufacturing.

[0036] For example, Figure 3 As shown, the annular outer partition 76 includes a first end plate 71 and a second end plate 72 that are opposite to and spaced apart in a first direction, and two ends of a plurality of inner partitions 8 are respectively connected to the first end plate 71 and the second end plate 72. A water inlet 73 can be set on the first end 71, and a water outlet 74 can be set on the second end plate 72. The coolant flowing in through the water inlet 73 can utilize the gap between the inner partition 8 and the annular outer partition 76 to supply liquid toward the plurality of liquid storage channels 111, and then the coolant in all the liquid storage channels 111 can be concentrated and flow out from the water outlet 74 after completing the heat exchange.

[0037] Optionally, in other embodiments, both ends of the inner partition 8 are connected to the annular outer partition 76, and each liquid storage channel 111 is independent of each other. The annular outer partition 76 needs to be provided with a water inlet 73 and a water outlet 74 at both ends of each liquid storage channel 111, so as to realize liquid supply to each liquid storage channel 111.

[0038] Optionally, in other embodiments, both ends of some inner baffles 8 are connected to the annular outer baffle 76, and both ends of another part of the inner baffles 8 are separated from the annular outer baffle 76. Thus, the multiple liquid storage channels 111 formed by the multiple inner baffles 8 include some interconnected liquid storage channels 111 and another part of mutually independent liquid storage channels 111. For the interconnected liquid storage channels 111, a group of water inlets 73 and water outlets 74 communicating therewith may be provided on the annular outer baffle 76, and for the mutually independent liquid storage channels 111, a water inlet 73 and a water outlet 74 corresponding to each liquid storage channel 111 may be provided on the annular outer baffle 76.

[0039] Furthermore, if Figure 2 As shown, the end surface of the pole 31 of each battery cell facing the bottom wall of the accommodating cavity is also connected to a tab 32, and at least part of the tab 32 extends into the liquid storage channel 11. Therefore, the coolant in the liquid storage channel 111 can directly cool the pole 31 and the tab 32. Compared with the traditional method of contact cooling with the liquid cooling plate and the tab 32, the immersion cooling can avoid the problem of misalignment between the liquid cooling plate and the tab 32 caused by battery cell expansion or thermal runaway, thereby avoiding the problem of cooling failure or breakage of the tab 32 due to assembly misalignment.

[0040] In addition, it should be noted that the bar 32 can be completely immersed in the coolant, or partially immersed in the coolant, which can be determined according to the layout of the bar 32. For example, after the bar 32 is connected to the pole 31, if the overall height of the bar 32 is not higher than the end surface of the pole 31 of the battery cell, the coolant will completely immerse the bar 32 when cooling the pole 31. If a partial area of ​​the bar 32 is higher than the end surface of the pole 31 of the battery cell (for example, a partial structure of the bar 32 protrudes between adjacent battery cells), the coolant will only immerse a partial area of ​​the bar 32.

[0041] Optionally, the battery pack further includes a sealing strip 11, which is sandwiched between the partition 7 and the end surface of the bottom wall of the battery cell facing the accommodating cavity. An explosion-proof valve 75 is also provided on the partition 7. The position and number of the explosion-proof valve 75 are not restricted, and timely pressure relief can be achieved in the coolant area.

[0042] Optionally, the sealing between the partition 7 and the battery cell is not limited to sandwiching a sealing strip therebetween. For example, a sealing member may be coated on the outside of the contact between the partition and the end surface of the battery cell to achieve sealed contact between the partition 7 and the battery cell by using an external sealing method. The specific sealing method can be selected according to needs and is not limited here.

[0043] Furthermore, the battery pack also includes a top liquid cooling plate 2 and a connecting pipe 6. The top liquid cooling plate 2 is connected to the opening of the accommodating chamber and contacts the end face of the battery cell module 3 away from the bottom wall. The connecting pipe 6 is connected between the top liquid cooling plate 2 and the liquid storage channel 111. Since the top liquid cooling plate 2 and the liquid storage channel 111 are connected through the connecting pipe 6, the top liquid cooling plate 2 and the liquid storage channel 111 only require one set of cooling pipe systems to complete the circulation of the coolant, thereby optimizing the pipe layout. It can be understood that after the battery cell module 3 is inverted in the accommodating chamber, the end face of the battery cell away from the bottom wall is facing the opening of the accommodating chamber. After assembly, the top liquid cooling plate 2 can just contact and exchange heat with the end face of the battery cell module 3 away from the bottom wall. The end face of the battery cell module 3 away from the bottom wall is a whole surface formed by the end faces of multiple battery cells away from the bottom wall.

[0044] Furthermore, a water inlet 73 and a water outlet 74 are provided on the annular outer baffle 76, both ends of the plurality of inner baffles 8 are spaced apart from the annular outer baffle 76, and the top liquid cooling plate 2 is connected to the water inlet 73 via a connecting pipe 6. In other words, the plurality of liquid storage channels constructed by the inner baffle 8 are interconnected, and only one connecting pipe 6 needs to be provided to pass the coolant into the inner side of the annular outer baffle 76 through the water inlet 73.

[0045] When both ends of the plurality of inner baffles 8 are connected to the annular outer baffle 76, since the plurality of liquid storage channels 111 are independent of each other, it is necessary to set a plurality of corresponding connecting pipes 6 according to the number of liquid storage channels 111.

[0046] In addition, when part of the multiple inner partitions 8 is separated from the annular outer partition 76 and the other part is connected to the annular outer partition 76, since some of the liquid storage channels 111 are interconnected and other parts of the liquid storage channels 111 are independent of each other, the connected liquid storage channels 111 can share a connecting pipeline 6, and each independent liquid storage channel 111 needs to be respectively provided with a corresponding connecting pipeline 6. In other words, the layout quantity of the connecting pipeline 6 can be determined according to the number and layout form of the liquid storage channels 111.

[0047] Furthermore, the battery pack also includes a liquid inlet pipeline 4 and a liquid return pipeline 5, wherein the liquid inlet pipeline 4 is connected to one of the top liquid cooling plate 2 and the liquid storage channel 111, and the liquid return pipeline 5 is connected to the top liquid cooling plate 2 and the other of the liquid storage channel 111. Taking the connection between the liquid inlet pipeline 4 and the top liquid cooling plate 2 as an example, the coolant can flow into the top liquid cooling plate 2 through the liquid inlet pipeline 4 and exchange heat with the battery cell, and the coolant after heat exchange can flow to the liquid storage channel 111 through the connecting pipeline 6, and the coolant in the liquid storage channel 111 can immerse the pole 31 to achieve direct cooling of the pole 31, and the coolant after heat exchange can flow out through the liquid return pipeline 5 connected to the liquid storage channel 111 to complete the cooling cycle.

[0048] Optionally, the liquid in the liquid inlet pipeline 4 can also be connected to the liquid storage channel 111, and the return liquid pipeline 5 is connected to the top liquid cooling plate 2, and the cooling liquid flows along the liquid inlet pipeline 4, the liquid storage channel 111, the connecting pipeline 6, the top liquid cooling plate 2 and the return liquid pipeline 5 to form a cooling cycle.

[0049] Further, in the second direction, the connecting pipeline 6 is located on one side of the battery module 3, and the liquid inlet pipeline 4 and the liquid return pipeline 5 are located on the other side of the battery module 3, and the liquid inlet pipeline 4 and the liquid return pipeline 5 are integrated into one. Taking the connection between the liquid inlet pipeline 4 and the top liquid cooling plate 2 as an example, in this embodiment, the coolant can flow into the top liquid cooling plate 2 through the liquid inlet pipeline 4 and fully flow and exchange heat along the length direction of the battery module 3, and then flow into the liquid storage channel 111 away from the end of the liquid return pipeline 5 through the connecting pipeline 6, and then fully reflux and exchange heat along the length direction of the battery module 3 and flow out from the liquid return pipeline 5, maximizing the effective cooling stroke of the coolant. And because the liquid inlet pipeline 4 and the liquid return pipeline 5 are integrated into one, the structure is compact, the space occupancy is small, and it is convenient to disassemble and assemble with the external pipeline.

[0050] In some embodiments, the top liquid cooling plate 2 includes a cold plate body, an insulating coating and a flow channel plate, the flow channel plate has a flow channel, the cold plate body is buckled on the flow channel plate, the insulating coating is laid on the cold plate body, and the top liquid cooling plate 2 and the battery cell module 3 are connected by a thermal conductive adhesive 8.

[0051] Furthermore, if Figure 6 As shown, the top liquid cooling plate 2 is provided with a water nozzle 10 extending vertically toward the box body 1, the connecting pipe 6 is plug-fitted with the water nozzle 10, the water nozzle 10 is connected with the liquid cooling flow channel in the top liquid cooling plate 2, and the connecting pipe 6 and the water nozzle 10 are plug-fitted, so that the connecting pipe 6 can be quickly disassembled and assembled.

[0052] In some embodiments, Figure 6 As shown, the connecting pipe 6 includes a straight section plugged into the water nozzle 10 and a bent section connected to the end of the straight section away from the water nozzle 10, and the direction of the water outlet end of the bent section is generally consistent with the extension direction of the liquid storage channel 111, so that the coolant can be transported relatively smoothly between the top liquid cooling plate 2 and the bottom liquid cooling channel.

[0053] Alternatively, if Figure 5 As shown, the liquid inlet pipeline 4 and the liquid return pipeline 5 can also be constructed into a bent structure according to layout requirements, and the specific structural form is not limited.

[0054] The vehicle of the embodiment of the utility model includes the battery pack of the above embodiment.

[0055] The vehicle of the utility model embodiment adopts the above-mentioned battery pack, the battery module 3 includes at least one row of battery cells arranged along the first direction, the box body 1 has a receiving cavity, the bottom wall of the receiving cavity has a partition 7 protruding toward the battery module 3, the partition 7 and the bottom wall of the receiving cavity enclose at least one liquid storage channel 111, the liquid storage channel 111 extends along the first direction and is open toward the battery module 3, the battery module 3 is arranged in the receiving cavity, and the end face where the pole 31 of the battery cell is located faces the bottom wall of the receiving cavity, and each battery cell is divided into two sides of the end face facing the bottom wall. The coolant 31 of each battery cell is in sealed contact with the partition 7, and the pole 31 of each battery cell extends into the liquid storage channel 111, thereby, the partition 7, the box body 1 and the battery cell module 3 can constitute an independent liquid storage channel 111, and the coolant in the liquid storage channel 111 will not leak to other areas of the battery pack, thereby realizing dry-wet separation, ensuring that the components in the battery pack are compatible with the coolant, and because the coolant is restricted to remain in the partition 7, when the components in the battery pack are repaired, the coolant will not leak, thereby ensuring the feasibility and convenience of repair.

[0056] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0057] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0058] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0060] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0061] It should be understood that the utility model does not limit its application to the detailed structure and arrangement of the components proposed in this specification. The utility model can have other embodiments and can be implemented and executed in a variety of ways. The aforementioned deformation forms and modified forms fall within the scope of the utility model. It should be understood that the utility model and the utility model defined in this specification extend to all alternative combinations of two or more individual features mentioned or evident in the text and / or the drawings. All these different combinations constitute multiple alternative aspects of the utility model. The embodiments of this specification illustrate the best mode known for implementing the utility model and will enable those skilled in the art to utilize the utility model.

Claims

1. A battery pack, characterized in that: include: A battery cell module, wherein the battery cell module comprises at least one row of battery cells arranged along a first direction; A box body, the box body having a receiving cavity, the bottom wall of the receiving cavity having a partition protruding toward the battery cell module, the partition and the bottom wall of the receiving cavity enclose at least one liquid storage channel, the liquid storage channel extends along the first direction and is open toward the battery cell module; Among them, the battery cell module is arranged in the accommodating cavity, and the end surface of the battery cell where the pole is located faces the bottom wall of the accommodating cavity, the two sides of the end surface of each battery cell facing the bottom wall are respectively in sealing contact with the partition, and the pole of each battery cell extends into the liquid storage channel.

2. The battery pack according to claim 1, characterized in that: The partition includes an annular outer partition and multiple inner partitions, the multiple inner partitions are arranged in the annular outer partition at intervals along the second direction and extend along the first direction, the annular outer partition, the multiple inner partitions and the bottom wall of the accommodating cavity form multiple liquid storage channels, the battery cell module includes multiple rows of battery cells arranged along the second direction, each of the liquid storage channels corresponds to a row of the battery cells, and the second direction is perpendicular to the first direction.

3. The battery pack according to claim 2, characterized in that: There is a gap between the two ends of each inner partition and the annular outer partition.

4. The battery pack according to claim 1, characterized in that: It also includes a sealing strip, which is sandwiched between the partition and the end surface of the battery cell facing the bottom wall of the accommodating cavity.

5. The battery pack according to claim 1, characterized in that: A tab is also connected to the end surface of the pole of each battery cell facing the bottom wall of the accommodating cavity, and at least a portion of the tab extends into the liquid storage channel.

6. The battery pack according to claim 3, characterized in that: It also includes a top liquid cooling plate and a connecting pipeline, wherein the top liquid cooling plate is connected to the opening of the accommodating cavity and contacts the end surface of the battery cell module away from the bottom wall, and the connecting pipeline is connected between the top liquid cooling plate and the liquid storage channel.

7. The battery pack according to claim 6, characterized in that: A water inlet and a water outlet are provided on the annular outer baffle, both ends of the plurality of inner baffles are separated from the annular outer baffle, and the top liquid cooling plate is connected to the water inlet via a connecting pipe.

8. The battery pack according to claim 7, characterized in that: It also includes a liquid inlet pipeline and a liquid return pipeline, the liquid inlet pipeline is connected to the top liquid cooling plate and one of the liquid storage channels, the liquid return pipeline is connected to the top liquid cooling plate and the other of the liquid storage channels, and the liquid inlet pipeline and the liquid return pipeline are integrated into one.

9. The battery pack according to claim 8, characterized in that: In the first direction, the connecting pipeline is located on one side of the battery cell module, and the liquid inlet pipeline and the liquid return pipeline are located on the other side of the battery cell module.

10. A vehicle, characterized in that: Comprising a battery pack according to any one of claims 1-9.

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