CN215451653U - Battery package and vehicle - Google Patents

Abstract

The utility model belongs to the technical field of power batteries, and particularly relates to a battery pack and a vehicle. The battery pack comprises a battery assembly and a heat dissipation assembly for dissipating heat of the battery assembly; the battery assembly comprises a battery box body, the battery box body comprises an outer box and a plurality of partition plates which are arranged in the outer box at intervals in parallel, and the partition plates divide the inner space of the outer box into a plurality of accommodating cavities; the heat dissipation assembly comprises a collecting pipe and at least one branch pipe, the collecting pipe comprises a liquid inlet channel and a liquid outlet channel, an outlet of the liquid inlet channel is communicated with an inlet of the at least one branch pipe, and an inlet of the liquid outlet channel is communicated with an outlet of the at least one branch pipe. In the utility model, the paths of the inflow and the return of the refrigerant or the cooling liquid in the branch pipes are basically consistent, and the heat transfer path of each branch pipe is basically consistent, so that the heat transfer uniformity of the branch pipes and the batteries in the containing cavities is improved, namely, the temperature consistency of the batteries in the containing cavities is improved, and the service life of the batteries is prolonged.

Description

Battery package and vehicle

Technical Field

The utility model belongs to the technical field of power batteries, and particularly relates to a battery pack and a vehicle.

Background

With the continuous development of vehicles, the battery pack is used as an energy supply component of the vehicle, and the demand of the battery pack is larger and larger. The battery pack generally comprises a battery box body and a battery arranged in the battery box body, the temperature of the battery can be increased due to heat emitted by the battery in the working process of the battery, and the accident that internal components are burnt out due to overhigh temperature of the battery can easily occur; therefore, a battery heat dissipation structure is required to be installed in the battery box body, and the battery heat dissipation structure can assist the battery in heat dissipation, so that the battery can work within a normal temperature range.

In the prior art, a battery heat dissipation structure is usually formed by bending a cooling pipe, and after a cooling medium dissipates heat to a battery in a cooling pipe, the cooling medium at the rear part of the cooling pipe has poor heat dissipation effect to the battery, so that the temperature uniformity of the battery is poor.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery pack and a vehicle, aiming at the technical problems of poor battery temperature uniformity and the like caused by a battery heat dissipation structure in the prior art.

In view of the above technical problems, an embodiment of the present invention provides a battery pack, including a battery assembly and a heat dissipation assembly for dissipating heat from the battery assembly; the battery assembly comprises a battery box body, the battery box body comprises an outer box and a plurality of partition plates which are arranged in the outer box at intervals in parallel, and the partition plates divide the inner space of the outer box into a plurality of accommodating cavities; the heat dissipation assembly comprises a collecting pipe and at least one branch flow pipe, the collecting pipe comprises a liquid inlet channel and a liquid outlet channel, an outlet of the liquid inlet channel is communicated with an inlet of the at least one branch flow pipe, and an inlet of the liquid outlet channel is communicated with an outlet of the at least one branch flow pipe;

and the outlet of the liquid inlet channel communicated with each branch flow pipe is adjacent to the inlet of the liquid outlet channel.

Optionally, the header further includes a partition located inside the header, the partition extends along a direction in which the header extends and partitions the header into the liquid inlet channel and the liquid outlet channel, which are arranged side by side.

Optionally, the liquid inlet channel has a plurality of outlets, the liquid outlet channel has a plurality of inlets, and in the collecting pipe, the outlets of the liquid inlet channel and the inlets of the liquid outlet channel are arranged along the central line of the collecting pipe in a mirror image mode respectively.

Optionally, the branch flow pipe is including the feed liquor son branch flow pipe, the rotor branch flow pipe and play liquid son branch flow pipe that communicate in proper order, the feed liquor son branch flow pipe is kept away from the one end intercommunication of rotor branch flow pipe inlet channel's export, it keeps away from to go out liquid branch flow pipe the one end intercommunication that turns to the son branch flow pipe goes out liquid channel's import.

Optionally, the liquid inlet branch pipe and the liquid outlet branch pipe have a gap therebetween, and the gap between each branch pipe is equal.

Optionally, the header and the at least one branch pipe are of an integrally formed structure.

Optionally, each of the branch pipes comprises a first serpentine pipe and a second serpentine pipe, the first serpentine pipe enclosing an inner space, the second serpentine pipe being located in the inner space; the inlet of the first coiled pipe and the inlet of the second coiled pipe are both communicated with the outlet of the liquid inlet channel, and the outlet of the first coiled pipe and the outlet of the second coiled pipe are both communicated with the outlet of the branch pipe.

Optionally, battery pack still includes the heat preservation backplate that is equipped with the holding tank, tributary pipe passes through heat preservation backplate seal installation is in on the outer wall of outer container, just tributary pipe is located the holding tank in the holding tank.

Optionally, the outer carton comprises a top panel, a bottom panel, a first side panel and a second side panel, the top panel and the bottom panel are oppositely arranged along a first direction, the first side panel and the second side panel are arranged along a second direction, the partition panel, the first side panel and the second side panel are fixedly connected to the top panel and the bottom panel, and the partition panel is located between the first side panel and the second side panel;

the partition plate, the top plate, the bottom plate, the first side plate and the second side plate are connected to form a box main body, the battery box body comprises at least one box main body, the length of the partition plate extends along a third direction, and the first direction is the height direction of the battery box body; the second direction is the length direction of the battery box body, the third direction is the width direction of the battery box body, or the second direction is the width direction of the battery box body, and the third direction is the width direction of the battery box body.

Another embodiment of the utility model further provides a vehicle, which comprises the battery pack.

In the utility model, the battery box body comprises an outer box and a plurality of partition plates which are arranged in the outer box at intervals in parallel, the partition plates divide the inner space of the outer box into a plurality of accommodating cavities, the heat dissipation assembly comprises a collecting pipe and at least one branch flow pipe, the collecting pipe comprises a liquid inlet channel and a liquid outlet channel, the outlet of the liquid inlet channel is communicated with the inlet of at least one branch flow pipe, and the inlet of the liquid outlet channel is communicated with the outlet of at least one branch flow pipe. The branch flow pipe can be installed on the outer wall surface of the outer box, a refrigerant flows into the branch flow pipe through the liquid inlet channel, the refrigerant can absorb and install the heat of the batteries in the accommodating cavities in the branch flow pipe, the accommodating cavities are arranged at intervals and in parallel, and the accommodating cavities are basically consistent with the heat transfer path of the branch flow pipe, so that the heat transfer uniformity of the branch flow pipe and the batteries in the accommodating cavities is improved, namely, the temperature consistency of the batteries in the accommodating cavities is improved, and the service life of the batteries is prolonged.

In addition, the outlet of the liquid inlet channel communicated with each branch flow pipe is adjacent to the inlet of the liquid outlet channel, namely, the branch flow pipes are connected in parallel between the outlet of the liquid inlet channel and the inlet of the liquid outlet channel, so that the inflow and backflow paths of the refrigerant in each branch flow pipe are basically consistent, and the heat transfer paths of each branch flow pipe are basically consistent, the heat transfer uniformity of the branch flow pipes and the batteries in the containing cavities is further improved, namely, the temperature consistency of the batteries in the containing cavities is further improved, and the service life of the batteries is further prolonged.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

Fig. 1 is an exploded view schematically illustrating a battery pack according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a heat dissipation assembly according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a header according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a battery assembly according to an embodiment of the present invention.

The reference numerals in the specification are as follows:

1. a battery assembly; 11. a battery case; 111. an outer box; 1111. a top plate; 1112. a base plate; 1113. a first side plate; 1114. a second side plate; 112. a partition plate; 113. an accommodating chamber; 114. a box main body; 12. a battery; 13. a first mounting lug; 14. a second mounting lug; 15. a heat preservation guard plate; 151. accommodating grooves; 2. a heat dissipating component; 21. a header pipe; 211. a liquid inlet channel; 212. a liquid outlet channel; 213. a separator; 22. a bypass pipe; 221. a liquid inlet branch pipe; 222. a steering sub branch pipe; 223. liquid outlet branch pipes; 224. a first serpentine tube; 225. a second serpentine tube; x, a second direction; y, a third direction; z, first direction.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

It is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", "middle", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.

As shown in fig. 1 and 4, a battery pack according to an embodiment of the present invention includes a battery assembly 1 and a heat dissipation assembly 2; the battery assembly 1 comprises a battery box body 11, the battery box body 11 comprises an outer box 111 and a plurality of partition plates 112 which are arranged in the outer box 111 at intervals in parallel, and the partition plates 112 divide the inner space of the outer box 111 into a plurality of accommodating cavities 113; it is understood that a plurality of the accommodating cavities 113 are arranged in parallel and at intervals, each accommodating cavity 113 can be provided with one battery 12, and two adjacent batteries 12 are separated by the partition plate 112.

Preferably, the wall thickness of the outer box 111 and the partition plate 112 is greater than or equal to 2mm (e.g., 2mm, 2.5mm, 3mm, 4mm, etc.); further, the thermal conductivity of the outer case 111 and the partition plate 112 is greater than or equal to 160w/m.k (e.g., 160w/m.k, 18w/m.k, 20w/m.k, etc.). In addition, the outer box 111 and the partition plate 112 are made of aluminum alloy or other metal materials, and the heat dissipation assembly 2 can absorb heat of the battery 12 through the thicknesses of the outer box 111 and the partition plate 112.

As shown in fig. 2 and fig. 3, the heat dissipation assembly 2 includes a header 21 and at least one branch flow pipe 22, the header 21 includes a liquid inlet passage 211 and a liquid outlet passage 212, an outlet of the liquid inlet passage 211 is communicated with an inlet of the at least one branch flow pipe 22, and an inlet of the liquid outlet passage 212 is communicated with an outlet of the at least one branch flow pipe 22; it is understood that the number of the branch pipes 22 can be set according to the length of the outer case 111, for example, the number of the branch pipes 221 is set to 3, 4, 5, etc.; and a plurality of branch pipes 22 are connected in parallel between the liquid inlet passage 211 and the liquid outlet passage 212.

Wherein, the outlet of the liquid inlet channel 211 communicated with each branch pipe 22 is adjacent to the inlet of the liquid outlet channel 212. It is understood that a plurality of branch pipes 22 are arranged on the header 21 at intervals and side by side, that is, the inlet and outlet of the branch pipes 22 are arranged adjacent to each other.

Preferably, the header 21 and the at least one branch pipe 22 are formed as an integral structure. That is, the heat dissipation assembly 2 is an integrally formed structure, and the integrally formed heat dissipation assembly 2 has sufficient strength and rigidity, so that the service life of the heat dissipation assembly 2 is prolonged.

In the utility model, the battery box body 11 includes an outer box 111 and a plurality of partition plates 112 arranged in the outer box 111 at intervals in parallel, the partition plates 112 partition the inner space of the outer box 111 into a plurality of accommodating cavities 113, the heat dissipation assembly 2 includes a header 21 and at least one branch pipe 22, the header 21 includes a liquid inlet passage 211 and a liquid outlet passage 212, the outlet of the liquid inlet passage 211 is communicated with the inlet of the at least one branch pipe 22, and the inlet of the liquid outlet passage 212 is communicated with the outlet of the at least one branch pipe 22. The branch flow pipe 22 can be installed on the outer wall surface of the outer box 111, a refrigerant flows into the branch flow pipe 22 through the liquid inlet channel 211, the refrigerant can absorb heat of the batteries 12 installed in the accommodating cavities 113 in the branch flow pipe 22, the accommodating cavities 113 are arranged at intervals and in parallel, and heat transfer paths of the accommodating cavities 113 and the branch flow pipe 22 are basically consistent, so that the heat transfer uniformity of the branch flow pipe 22 and the batteries 12 in the accommodating cavities 113 is improved, that is, the temperature consistency of the batteries 12 in the accommodating cavities 113 is improved, and the service life of the batteries 12 is prolonged.

In addition, the outlet of the liquid inlet channel 211 communicated with each branch flow pipe 22 and the inlet of the liquid outlet channel 212 are adjacently arranged, that is, the plurality of branch flow pipes 22 are connected in parallel between the outlet of the liquid inlet channel 211 and the inlet of the liquid outlet channel 212, so that the paths of the refrigerant flowing in and flowing back in each branch flow pipe 22 are basically consistent, and the heat transfer path of each branch flow pipe 22 is basically consistent, thereby further improving the uniformity of the heat transfer between the branch flow pipe 22 and the battery 12 in each accommodating cavity 113, that is, further improving the uniformity of the temperature of the battery 12 in the accommodating cavity 113, and further prolonging the service life of the battery 12.

It should be noted that, according to actual requirements, the refrigerant in the branch pipe 22 may also raise the temperature of the battery 12 in the accommodating cavity 113, and a heat transfer path of the refrigerant to the battery 12 in the branch pipe 22 is consistent with a heat dissipation path of the refrigerant to the battery 12 in the branch pipe 22, which is not described herein again.

In an embodiment, as shown in fig. 3, the header 21 further includes a partition 213 located inside the header 21, where the partition 213 extends along an extending direction of the header 21 and divides the header 21 into the liquid inlet channel 211 and the liquid outlet channel 212, which are arranged side by side. It can be understood that the liquid inlet channel 211 and the liquid outlet channel 212 are two layers of structural members spaced up and down, and the liquid inlet channel 211 and the liquid outlet channel 212 are separated by the partition 213; and the separator 213 includes, but is not limited to, a partition, etc. In this embodiment, the liquid inlet channel 211 and the liquid outlet channel 212 are of an integrally formed structure, and the positions of the outlet of the branch pipe 22 and the outlet of the liquid inlet channel 211 are substantially the same as the positions of the inlet of the branch pipe 22 and the inlet of the liquid outlet channel 212, so that the heat dissipation efficiency of the heat dissipation assembly 2 is improved.

In an embodiment, as shown in fig. 3, the liquid inlet channel 211 has a plurality of outlets, and the liquid outlet channel 212 has a plurality of inlets, and in the header 21, the outlets of the liquid inlet channel 211 and the inlets of the liquid outlet channel 212 are respectively arranged along a central line of the header 21 in a mirror image manner. It can be understood that the outlets of the liquid inlet channels 211 are symmetrically distributed on two opposite sides of the liquid inlet channels 211, and the inlets of the liquid outlet channels 212 are symmetrically distributed on two opposite sides of the liquid outlet channels 212, so that the branch pipes 22 are symmetrically distributed on two opposite sides of the collecting pipe 21. In this embodiment, the heat dissipation assembly 2 has a simple structure, low manufacturing cost and convenient installation.

In an embodiment, as shown in fig. 2, the branch flow pipe 22 includes a liquid inlet branch flow pipe 221, a steering branch flow pipe 222, and a liquid outlet branch flow pipe 223, which are sequentially connected, wherein one end of the liquid inlet branch flow pipe 221, which is far away from the steering branch flow pipe 222, is connected to an outlet of the liquid inlet channel 211, and one end of the liquid outlet branch flow pipe 22, which is far away from the steering branch flow pipe 222, is connected to an inlet of the liquid outlet channel 212. Preferably, the liquid inlet branch pipe 221 and the liquid outlet branch pipe 223 have a spacing therebetween, and the spacing distance of each branch pipe 22 is equal. The distance between the branch pipes 22 is equal, so that the cold energy of the coolant or the refrigerant in the branch pipes 22 is transmitted to the battery box 11 as uniformly as possible, the heat transfer uniformity between the branch pipes 22 and the batteries 12 in the accommodating cavities 113 is further improved, and the temperature consistency of the batteries 12 in the accommodating cavities 113 is further improved. It can be understood that the inlet of the liquid inlet branch pipe 221 is communicated with the outlet of the liquid inlet channel 211, the outlet of the liquid inlet branch pipe 221 is communicated with the inlet of the turning branch pipe 222, the outlet of the turning branch pipe 222 is communicated with the inlet of the liquid outlet branch pipe 223, and the outlet of the liquid outlet branch pipe 223 is communicated with the inlet of the liquid outlet channel 212. In this embodiment, the turning branch flow pipe 22 is bent towards the end far away from the liquid outlet branch flow pipe 223, so that the distance between the inlet of the liquid inlet branch flow pipe 221 and the outlet of the liquid outlet branch flow pipe 223 is short, and the integration level of the heat dissipation assembly 2 is improved. In addition, the spacing distance may be set according to actual requirements, and in a specific embodiment, the value range of the spacing distance is 20mm to 30mm, for example, 20mm, 25mm, 30mm, and the like.

In one embodiment, as shown in FIG. 2, each of the branch pipes 22 comprises a first serpentine pipe 224 and a second serpentine pipe 225, the first serpentine pipe 224 enclosing an inner space, the second serpentine pipe 225 being located in the inner space; the inlet of the first serpentine pipe 224 and the inlet of the second serpentine pipe 225 are both communicated with the outlet of the liquid inlet channel 211, and the outlet of the first serpentine pipe 224 and the outlet of the second serpentine pipe 225 are both communicated with the outlet of the branch pipe 22. It will be appreciated that the first serpentine tube 224 and the second serpentine tube 225 are each of a U-shaped configuration, and the second serpentine tube 225 is located within the first serpentine tube 224. In this embodiment, one branch pipe 22 includes the first serpentine pipe 224 and the second serpentine pipe 225 connected in parallel, and both the first serpentine pipe 224 and the second serpentine pipe 225 can dissipate heat of the battery 12 in the accommodating cavity 113, so as to further improve the heat dissipation efficiency of the battery pack. In addition, the first serpentine pipe 224 and the second serpentine pipe 225 are both hollow structures, and the weight of the branch pipe 22 can be reduced by more than 50% compared with a cold plate structure formed by stamping and brazing, thereby being beneficial to the light weight design of the vehicle. In addition, the heat conducting area of the branch flow pipe 22 is less than half of that of the stamping cold plate, so that the use amount of heat conducting glue between the branch flow pipe 22 and the outer box 111 is reduced, and the weight and the manufacturing cost of the battery pack are further reduced.

Further, each of the first serpentine pipe 224 and the second serpentine pipe 225 includes an inlet branch pipe 221, a diverter branch pipe 222, and an outlet branch pipe 223. According to actual requirements, the branch pipe 22 may further include a third serpentine pipe, a fourth serpentine pipe, and the like, which are the same as the second serpentine pipe 225, the third serpentine pipe is disposed in the second serpentine pipe 225, and the fourth serpentine pipe is disposed in the third serpentine pipe; it should be noted that, due to the arrangement of the branch pipe 222 of the steering sub-pipe, the occupied space is relatively large, and in order to prevent the interference between two adjacent branch pipes 22, the branch pipes 22 are preferably formed by the first serpentine pipe 224 and the second serpentine pipe 225.

In an embodiment, as shown in fig. 1, the battery assembly 1 further includes a heat insulation board 15 having a receiving groove 151, the branch pipe 22 is hermetically mounted on the outer wall of the outer box 111 through the heat insulation board 15, and the branch pipe 22 is located in the receiving groove 151 and the receiving groove 151. It can be understood that the branch flow pipe 22 is located between the heat preservation guard plate 15 and the outer wall of the outer box 111, on one hand, the heat preservation guard plate 15 can play a role in slowing down the external impact force received by the heat dissipation assembly 2, so as to avoid the accident that the battery pack is damaged due to the fact that the battery pack receives a larger external impact force, and on the other hand, the heat preservation effect of the whole battery pack is also facilitated. In addition, the branch flow tube 22 is positioned in the accommodating groove 151, so that the stability of the branch flow tube 22 mounted on the outer box 111 is improved, and the service life of the battery pack is prolonged; in addition, the compactness of the battery pack is improved.

Optionally, the outer bin 111 comprises a top panel 1111, a bottom panel 1112, a first side panel 1113 and a second side panel 1114, the top panel 1111 and the bottom panel 1112 being disposed opposite each other in a first direction, the first side panel 1113 and the second side panel 1114 being disposed in a second direction, the divider panel 112, the first side panel 1113, the second side panel 1114 each being fixedly connected to the top panel 1111 and the bottom panel 1112, the divider panel 112 being located between the first side panel 1113 and the second side panel 1114; as can be appreciated, the separation plate 112 penetrates the accommodation groove 151; each of the box main bodies 114 is provided with a plurality of the accommodating chambers 113.

The partition plate 112, the top plate 1111, the bottom plate 1112, the first side plate 1113, and the second side plate 1114 are connected to form a box main body 114, the battery box body 11 includes at least one box main body 114, the length of the partition plate 112 extends along a third direction, and the first direction is a height direction of the battery box body 11 (i.e., a direction indicated by a reference Z in fig. 4; i.e., when the battery pack is mounted on an automobile, the first direction is an up-down direction of the automobile); the second direction is a length direction of the battery case 11 (i.e., a direction indicated by an X mark in fig. 4), the third direction is a width direction of the battery case 11 (i.e., a direction indicated by a Y mark in fig. 4), or the second direction is a width direction of the battery case 11, and the third direction is a width direction of the battery case 11. It is understood that two adjacent tank main bodies 114 are connected by the first side plate 1113 or the second side plate 1114, and the number of the tank main bodies 114 can be set according to actual requirements. In this embodiment, the battery box 11 may include a plurality of box main bodies 114 connected to each other according to actual requirements; that is, the battery box 11 adopts a modular design, which combines production and manufacturing processes of standardization, modularization, batch production and the like, and reduces the manufacturing cost of the battery box 11. Moreover, the structure of the battery box body 11 can be adjusted in real time according to the requirements of the battery pack and the battery 12, so that the applicability and the universality of the battery pack are improved, and the battery box body 11 with the modular design has stronger development potential.

In one embodiment, as shown in fig. 4, the battery case 11 further includes a first mounting lug 13 and a second mounting lug 14 mounted on opposite sides of the outer case 111, and the first mounting lug 13 and the second mounting lug 14 are arranged in the second direction. Further, when the battery box body 11 includes one box main body 114, the first mounting lug 13 and the second mounting lug 14 are respectively disposed on two opposite sides of the one box main body 114; when the battery box body 11 includes a plurality of box main bodies 114, one of the two box main bodies 114 located at the head and tail ends of the plurality of box main bodies 114 is fixedly connected to the first mounting lug 13, and the other is fixedly connected to the second mounting lug 14, that is, the outermost one of the box main bodies 114 is connected to the first mounting lug 13, the other one of the box main bodies 114 is connected to the second mounting lug 14, and the two adjacent box main bodies 114 in the middle are fixedly connected to each other through the first side plate 1113 or the second side plate 1114. In this embodiment, the battery case 11 is convenient to mount.

Another embodiment of the utility model further provides a vehicle, which comprises the battery pack.

The present invention is not limited to the above embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A battery pack is characterized by comprising a battery assembly and a heat dissipation assembly for dissipating heat of the battery assembly; the battery assembly comprises a battery box body, the battery box body comprises an outer box and a plurality of partition plates which are arranged in the outer box at intervals in parallel, and the partition plates divide the inner space of the outer box into a plurality of accommodating cavities;

the heat dissipation assembly comprises a collecting pipe and at least one branch flow pipe, the collecting pipe comprises a liquid inlet channel and a liquid outlet channel, an outlet of the liquid inlet channel is communicated with an inlet of the at least one branch flow pipe, and an inlet of the liquid outlet channel is communicated with an outlet of the at least one branch flow pipe;

and the outlet of the liquid inlet channel communicated with each branch flow pipe is adjacent to the inlet of the liquid outlet channel.

2. The battery pack according to claim 1, wherein the header further includes a partition inside the header, the partition extending in a direction in which the header extends and partitioning the header into the inlet passage and the outlet passage arranged side by side.

3. The battery pack according to claim 1, wherein the inlet passage has a plurality of outlets, the outlet passage has a plurality of inlets, and the outlets of the inlet passage and the inlets of the outlet passage are respectively arranged in the header in a mirror image along a center line of the header.

4. The battery pack according to claim 1, wherein the branch flow pipe comprises a liquid inlet branch flow pipe, a steering branch flow pipe and a liquid outlet branch flow pipe which are sequentially communicated, wherein one end of the liquid inlet branch flow pipe, which is far away from the steering branch flow pipe, is communicated with the outlet of the liquid inlet channel, and one end of the liquid outlet branch flow pipe, which is far away from the steering branch flow pipe, is communicated with the inlet of the liquid outlet channel.

5. The battery pack according to claim 4, wherein the inlet and outlet branch pipes are spaced apart from each other at equal intervals.

6. The battery pack of claim 1, wherein the manifold and the at least one branch tube are of unitary construction.

7. The battery pack of claim 1, wherein each of the branch tubes comprises a first serpentine tube enclosing an interior space and a second serpentine tube located in the interior space; the inlet of the first coiled pipe and the inlet of the second coiled pipe are both communicated with the outlet of the liquid inlet channel, and the outlet of the first coiled pipe and the outlet of the second coiled pipe are both communicated with the outlet of the branch pipe.

8. The battery pack of claim 1, wherein the battery assembly further comprises a heat-insulating cover having a receiving groove, the branch pipe is sealingly mounted on the outer wall of the outer case through the heat-insulating cover, and the branch pipe is located in the receiving groove.

9. The battery pack of claim 1, wherein the outer case includes a top panel, a bottom panel, a first side panel, and a second side panel, the top panel and the bottom panel being disposed opposite to each other along a first direction, the first side panel and the second side panel being disposed along a second direction, the divider panel, the first side panel, and the second side panel each being fixedly connected to the top panel and the bottom panel, the divider panel being located between the first side panel and the second side panel;

the partition plate, the top plate, the bottom plate, the first side plate and the second side plate are connected to form a box main body, the battery box body comprises at least one box main body, the length of the partition plate extends along a third direction, and the first direction is the height direction of the battery box body; the second direction is the length direction of the battery box body, the third direction is the width direction of the battery box body, or the second direction is the width direction of the battery box body, and the third direction is the width direction of the battery box body.

10. A vehicle characterized by comprising the battery pack according to any one of claims 1 to 9.

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