CN219873742U - Battery module and battery pack - Google Patents

Abstract

The utility model discloses a battery module, comprising: the battery unit comprises at least two battery cores which are sequentially arranged; at least one cooling tube, the cooling tube is located at least one side of battery cell, and the cooling tube includes at least one baffle and the body that has the inner chamber, and the baffle sets up in the inner chamber of body, and the baffle separates into two-layer runner at least with the inner chamber of body, and two-layer runner are independent each other and be used for carrying out the heat exchange to same electricity core, and the both ends of each runner all are equipped with inlet and liquid outlet respectively in order to be used for independent inlet and outlet, and the coolant flow direction of adjacent two-layer runner is opposite. In the battery module, different flow channels which are independent from each other and have opposite flow directions are utilized to uniformly radiate different batteries in the same battery unit, so that the problem of unbalanced radiation of the battery module is solved. The utility model also discloses a battery pack.

Description

Battery module and battery pack

Technical Field

The utility model relates to the technical field of battery packs, in particular to a battery module and a battery pack.

Background

In the heat dissipation structure of the existing battery module, a corrugated pipe is generally adopted to be abutted against the periphery of the battery core for heat exchange, and a water inlet and a water outlet on the corrugated pipe are respectively arranged on two sides of each row of batteries.

However, during use, the following problems exist: because the coolant liquid in the bellows flows unidirectionally, when the coolant liquid is adopted to cool the battery cells, the temperature of the coolant liquid at the water inlet is lower, so that the battery cells at the front end dissipate heat quickly and have relatively lower temperature, and the temperature of the coolant liquid gradually rises along with the flow of the coolant liquid, so that the heat dissipation efficiency is insufficient, the battery cells at the rear end dissipate heat slowly and have relatively higher temperature, the temperature difference between different battery cells is overlarge, and the heat balance of the battery module is affected.

Disclosure of Invention

In order to overcome at least one of the above-mentioned drawbacks of the prior art, the present utility model provides a battery module, which uses different flow channels that are independent of each other and have opposite flow directions to uniformly dissipate heat from different batteries in the same battery unit, so as to solve the problem of unbalanced heat dissipation of the battery module.

The utility model adopts the technical proposal for solving the problems that:

a battery module, comprising:

the battery unit comprises at least two battery cores which are sequentially arranged;

at least one cooling tube, the cooling tube is located at least one side of battery cell, and the cooling tube includes at least one baffle and has the body of inner chamber, and the baffle is connected in the inner chamber of body, and the baffle separates the inner chamber of body into two-layer runner at least, and two-layer runner are independent each other and be used for carrying out the heat exchange to same electric core, and the both ends of each runner all are equipped with inlet and liquid outlet respectively in order to be used for independent inlet and outlet, and the coolant flow direction of two adjacent runners is opposite.

According to the battery module provided by the utility model, the inner cavity of the pipe body is separated by the partition plate in the cooling pipe to form at least two layers of mutually independent flow passages, each flow passage can independently feed and discharge liquid (namely, different flow passages are isolated to be respectively and independently used for cooling medium circulation, and cooling medium in any flow passage does not flow into other flow passages), and the flowing directions of the cooling medium of the adjacent two layers of flow passages are opposite, so that when the cooling pipe is applied to the battery module to radiate a battery unit, the cooling pipe is applied to the battery module to radiate heat by utilizing the mutual radiating effect of the at least two layers of flow passages on the same battery core, so that the problem of uneven radiating efficiency of different battery cores caused by heating of the cooling medium is solved, the temperature consistency of the different battery cores is improved, the service life of the battery cores is prolonged, and the heat balance of the battery module is solved.

Further, the electric cores are cylindrical electric cores, two adjacent cylindrical electric cores are radially arranged, and the arrangement direction of all flow channels in the cooling pipe is consistent with the height direction of the cylindrical electric cores.

Further, the solar cell further comprises a heat-conducting silica gel pad, and two opposite side surfaces of the heat-conducting silica gel pad are respectively attached to the side surface of the tube body and the side surface of the cell. Therefore, the battery cell and the tube body are contacted through the heat-conducting silica gel pad, and the heat-conducting silica gel pad has the functions of fully contacting, conducting heat and absorbing expansion of the battery cell.

Further, at least one outer side wall of the tube body is provided with a groove matched with the side face of the battery cell, so that the contact area during heat exchange is increased by the groove.

Further, the tube body is in a flat bar shape, the flow direction of the flow channels is consistent with the extending direction of the tube body, and the arrangement direction of all the flow channels is consistent with the width direction of the tube body.

Further, the battery units are provided with a plurality of battery units and are arranged at intervals along the first direction, the cooling pipes are provided with a plurality of battery units and are arranged at intervals along the first direction, the pipe body comprises at least three heat exchange parts, at least two corner parts and two joint parts, all the heat exchange parts are arranged at intervals along the first direction, the corner parts connect the two adjacent heat exchange parts in series to form an S-shaped structure, the two joint parts are respectively connected to two ends of the S-shaped structure, the heat exchange parts, the corner parts and the joint parts form an inner cavity in a surrounding mode, the liquid inlet and the liquid outlet are located at the joint parts, and each battery unit is located between the two adjacent heat exchange parts of the same cooling pipe or between the heat exchange parts of the two adjacent cooling pipes. So, be different from ordinary S type runner, this scheme utilizes a plurality of cooling tubes in order to construct distributed runner to reduce the interior difference in temperature of runner, improve the temperature uniformity of different battery unit, simultaneously, can realize the double-sided heat exchange of cooling tube to battery unit, improve radiating efficiency.

Further, the heat exchange portion, the corner portion and the joint portion are integrally formed for easy production.

Further, the number of the heat exchange portions is an odd number of 3 or more, the number of the corner portions is one less than the number of the heat exchange portions, and in the extending direction along the length of the heat exchange portions, the corner portions are located between the liquid inlet and the liquid outlet of the same flow passage. In this way, in this S-shaped cooling tube, two joint portions are different, and inlet and liquid outlet expose to the outside, the access of cooling circulation system of being convenient for avoids hindering or collide with.

Further, at least part of the liquid inlet and at least part of the liquid outlet are all penetrated through two opposite sides of the joint part, and two channels at the same height in two adjacent cooling pipes can be conveniently connected in parallel through a short straight pipe, so that the cooling circulation system is conveniently connected.

Based on the same conception, the utility model also discloses a battery pack, and the battery pack is applied with the battery module.

Drawings

Fig. 1 is a schematic perspective view of a battery module according to embodiment 1 of the present utility model;

FIG. 2 is a schematic view showing the flow principle of the cooling medium when a plurality of cooling pipes of embodiment 1 of the present utility model are arranged;

FIG. 3 is a schematic perspective view of a cooling tube according to embodiment 1 of the present utility model;

FIG. 4 is an enlarged partial sectional view of the cooling tube of embodiment 1 of the present utility model;

FIG. 5 is a schematic perspective view of a cooling tube according to embodiment 2 of the present utility model;

fig. 6 is an enlarged partial sectional view of the cooling tube of embodiment 2 of the present utility model.

Wherein the reference numerals have the following meanings:

1. a cooling tube; 11. a tube body; 111. a heat exchange section; 112. corner portions; 113. a joint part; 114. a groove; 12. a partition plate; 13. a flow passage; 131. a liquid inlet; 132. a liquid outlet; 2. a battery cell; 3. a box body.

Detailed Description

For a better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model.

In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

Example 1

Referring to fig. 1, the utility model discloses a battery module, which comprises at least one battery unit, at least one cooling tube 1 and a box body 3, wherein the battery unit comprises at least two battery cells 2 (each battery unit is a row of battery cells 2, a plurality of battery cells are a plurality of rows of battery cells 2) which are sequentially stacked, the cooling tube 1 and the battery cells 2 are all arranged in the box body 3, the cooling tube 1 is positioned on at least one side of the battery unit (namely, each row of battery cells 2), and the side surface of the cooling tube 1 is propped against the side surface of the battery unit so as to utilize the cooling tube 1 to radiate heat of the battery unit. In addition, the utility model also discloses a battery pack using the battery module.

Importantly, referring to fig. 2 and 3, the cooling tube 1 includes a tube body 11 and at least one partition board 12, the tube body 11 has an inner cavity, the partition board 12 is disposed in the inner cavity of the tube body 11, the partition board 12 separates the inner cavity of the tube body 11 into at least two layers of independent flow channels 13 (i.e. different flow channels 13 are isolated to be used for cooling medium circulation respectively and independently, the cooling medium in any flow channel 13 does not flow into other flow channels 13), all flow channels 13 in the cooling tube 1 can be used for heat exchange with the same electric core 2, both ends of each flow channel 13 are respectively provided with a liquid inlet 131 and a liquid outlet 132 for independent liquid inlet and outlet, and the flowing directions of the cooling medium of two adjacent flow channels 13 are opposite.

Thus, in the above scheme, when the cooling pipe 1 is applied to the battery module to radiate heat of the battery unit, the heat radiation effect of at least two layers of mutually independent and opposite flow channels 13 in the cooling pipe 1 on the same battery cell 2 is utilized to balance the problem of uneven heat radiation efficiency of different battery cells 2 caused by heating of cooling medium, so that the temperature consistency of different battery cells 2 is improved, the service life of the battery cell 2 is prolonged, and the heat balance of the battery module is solved.

Referring to fig. 1 and 2, it can be appreciated that the tube 11 has a certain thickness and width, and the tube 11 can extend along a row of the cells 2 (e.g., substantially straight), or the tube 11 can extend along a plurality of rows of the cells 2 (e.g., substantially S); for ease of understanding, the respective sidewalls of the pipe body 11 are defined as follows: two side walls defining the thickness direction of the pipe body 11 are a left side wall and a right side wall, two side walls defining the width direction of the pipe body 11 are an upper side wall and a lower side wall, and two ends of the extending direction of the pipe body 11 can be sealed by welding or end block plugging. Each cell 2 has a certain height, and a certain gap is formed between two adjacent rows of cells 2 (i.e. between two adjacent battery cells), preferably, the gap between two adjacent rows of cells 2 is a constant value; of course, the adjacent two rows of the cells 2 may be arranged relatively in parallel (i.e. one of the cells 2 of one row is close to one of the cells 2 of the other row), or the adjacent two rows of the cells 2 may be arranged in a staggered manner (i.e. one of the cells 2 of one row is close to two of the cells 2 of the other row). The thickness of the tube 11 is adapted to the gap between two adjacent rows of the electric cores 2, so that two opposite outer side walls of the main heat dissipation portion of the tube 11 can be attached to the two rows of the electric cores 2, so that the two rows of the electric cores 2 can share one cooling tube 1, and meanwhile, the width of the tube 11 is adapted to the height of the electric cores 2.

Based on the definition as described above, it is preferable that the pipe body 11 has a substantially flat bar shape, the flow direction of the flow channels 13 coincides with the extending direction of the pipe body 11, and the arrangement direction of all the flow channels 13 coincides with the width direction of the pipe body 11; the electric core 2 is a cylindrical electric core, the electric cores 2 are arranged along the radial direction, and the arrangement direction of different flow channels 13 in the cooling pipe 1 is consistent with the height direction of the electric core 2. Specifically, two ends of the partition plate 12 are respectively connected to two ends of the extending direction of the tube body 11, and the opposite left side and right side of the partition plate 12 are respectively connected to the left side wall and the right side wall of the tube body 11, so that all the flow channels 13 are arranged along the width direction of the tube body 11, and when two large-area side surfaces of the tube body 11 are contacted with the annular side surfaces of the cells 2, the different flow channels 13 simultaneously perform heat exchange with the same cell 2, specifically, the same side of the different flow channels 13 performs heat exchange with part of the annular side surfaces of the same cell 2.

Of course, in other preferred embodiments, the battery cell 2 may have other shapes, such as a rectangular parallelepiped, a prismatic, an elliptic cylindrical, etc. A cylindrical cell is taken as an example of the cell 2 for the detailed explanation.

Referring to fig. 3 and 4, as an example, in the cooling tube 1, a partition 12 is provided, the partition 12 divides an inner cavity of the tube body 11 into two layers of flow channels 13 arranged up and down, wherein a liquid inlet 131 of the flow channel 13 located above and a liquid outlet 132 of the flow channel 13 located below are both provided at a first end of the tube body 11, a liquid outlet 132 of the flow channel 13 located above and a liquid inlet 131 of the flow channel 13 located below are both provided at a second end of the tube body 11, and the first end of the tube body 11 and the second end of the tube body 11 are both ends in an extending direction of the tube body 11. When the cooling tube 1 is used for radiating heat of the battery cell 2, the cooling medium in the upper flow channel 13 flows from the first end of the tube body 11 towards the second end of the tube body 11, and the cooling medium in the lower flow channel 13 flows from the second end of the tube body 11 towards the first end of the tube body 11, so that two independent and opposite cooling medium flow paths are formed; in the process of cooling medium flowing and radiating, the temperature of the cooling medium gradually rises after absorbing heat along the flowing direction of the cooling medium, so that the temperature of the cooling medium in the upper flow channel 13 gradually rises from the first end of the pipe body 11 towards the second end of the pipe body 11, heat exchange is carried out on the upper part of the battery cell 2, the temperature of the cooling medium in the lower flow channel 13 gradually rises from the second end of the pipe body 11 towards the first end of the pipe body 11, heat exchange is carried out on the lower part of the battery cell 2, and the temperature of a plurality of battery cells 2 arranged in the same row is ensured to be as consistent as possible, so that the problem of uneven radiating efficiency of different battery cells 2 caused by the temperature rising of the cooling medium in the prior art is solved.

Of course, the cooling medium in the two adjacent layers of flow channels 13 can also realize heat exchange at the position close to the partition plate 12, namely, the partition plate 12 is made of non-heat-insulating materials capable of realizing heat exchange, preferably, the partition plate 12 and the pipe body 11 are made of the same materials and are all made of metal materials, so that the problem that the cooling shrinkage stress of the battery core 2 is too concentrated due to the fact that the temperature difference at the connecting position of the two adjacent layers of flow channels 13 is large is avoided.

It is to be understood that the number of the separators 12 may be two, three, four, etc., and the present utility model is not particularly limited to the number of the separators 12. Of course, the number of the partition plates 12 is preferably singular.

Preferably, the inside of each flow channel 13 can also be designed as a harmonica structure to enhance support and avoid compression deformation of the cooling tube 1.

It will be appreciated that the cooling medium may be a gaseous or liquid substance, although a liquid substance is preferred.

Referring to fig. 3, in the present embodiment, at least one outer side wall of the tube 11 is provided with a groove 114 for matching with a side surface of the battery cell 2, so as to increase a contact area during heat exchange by using the groove 114. Preferably, grooves 114 are formed on two opposite outer sidewalls of the tube 11, so that the tube 11 can contact two rows of the battery cells 2 at the same time.

It should be noted that, when the battery cell 2 is a cylindrical battery cell, the groove 114 is curved to better fit to the annular side surface of the battery cell 2. Of course, when the battery cell 2 is in other shapes, the shape of the recess 114 can be adaptively changed to better fit the side surface of the battery cell 2.

In addition, in the battery module, in order to improve the contact sufficiency and the thermal conductivity between the cooling tube 1 and the battery cell 2 and to reduce the influence of the expansion of the battery cell 2 on the cooling tube 1, the battery module may further include a thermal conductive silicone pad (not shown in the drawing), and opposite sides of the thermal conductive silicone pad may be respectively attached to the sides of the tube body 11 and the side of the battery cell 2, specifically, the thermal conductive silicone pad may be at least partially located in the groove 114.

With the number of each component shown in fig. 1 as a reference, specifically, eight battery cells (namely, eight rows of battery cells 2 in total) are arranged, each battery cell comprises eight battery cells 2 (namely, sixty-four battery cells 2 in total), three cooling pipes 1 are arranged, each cooling pipe 1 is approximately in an S shape, eight battery slots for placing the battery cells are formed after the three cooling pipes 1 are arranged, and when each battery cell is placed in the battery slots, heat exchange can be performed between two sides of the battery cell and the same cooling pipe 1 or between two adjacent cooling pipes 1, so that the heat dissipation efficiency of the battery cell is improved. The plurality of battery cells are arranged at intervals along the first direction, and the plurality of cooling pipes 1 are also arranged at intervals along the first direction, wherein the first direction is perpendicular to the arrangement direction of the plurality of battery cells 2 in the same battery cell (it can be understood that when the plurality of battery cells 2 are stacked and arranged longitudinally to form a battery cell, the plurality of battery cells and the plurality of cooling pipes 1 are all arranged transversely, and at this time, the first direction is transverse). In this example, unlike the general S-shaped flow channel, the temperature difference in the flow channel 13 can be effectively reduced and the temperature uniformity of different battery cells can be improved by using a plurality of cooling pipes 1 to construct a distributed flow channel.

Of course, the directions of the battery cells, the cooling tube 1, and the battery cells 2 as described above are described only for convenience of understanding; in addition, the specific number of battery cells, cooling pipes 1, and battery cells 2 is not limited, and other numbers than those described above may be employed.

Referring to fig. 1 and 3, particularly, in the cooling tube 1, the tube body 11 includes a plurality of heat exchange portions 111, at least one corner portion 112 and two joint portions 113, the plurality of heat exchange portions 111 are arranged at intervals along the first direction, two adjacent heat exchange portions 111 are used for dissipating heat from two sides of a same battery unit (i.e. a same row of battery cells 2), the corner portion 112 connects the two adjacent heat exchange portions 111 in series to form an S-shaped structure, the two joint portions 113 are respectively connected to two ends of the S-shaped structure, the heat exchange portions 111, the corner portion 112 and the joint portions 113 together enclose an inner cavity, and the liquid inlet 131 and the liquid outlet 132 are located at the joint portions 113. In this way, when the cooling medium flows from one joint portion 113 to the other joint portion 113 in the flow passage 13, the cooling medium flows through all the heat exchange portions 111 and all the corner portions 112 in order to achieve the double-sided heat exchange of the cooling tube 1 to the battery cells, thereby achieving the purpose of improving the heat dissipation efficiency.

It will be appreciated that the number of corner portions 112 is one less than the number of heat exchanging portions 111 as a connecting member between the adjacent two heat exchanging portions 111.

Preferably, in the cooling tube 1, as shown in fig. 2 and 3, at least part of the liquid inlet 131 and at least part of the liquid outlet 132 extend through opposite sides of the joint 113. Specifically, in the intermediate cooling tube 1, all the liquid inlets 131 and all the liquid outlets 132 on the intermediate cooling tube penetrate through two opposite sides of the joint portion 113; in the cooling tube 1 at the rim, on one of the joint portions 113, the liquid inlet 131 and the liquid outlet 132 penetrate through both opposite sides of the joint portion 113, and on the other joint portion 113, the liquid inlet 131 and the liquid outlet 132 penetrate through only the same side of the joint portion 113. The significance of the arrangement is that two channels 13 positioned at the same height in two adjacent cooling pipes 1 can be conveniently connected in parallel through a short straight pipe between two liquid inlets 131 or between two liquid outlets 132, so that the cooling circulation system is convenient to access, and the connection is convenient and the cost is low.

Preferably, the heat exchange portion 111 is provided with three, the corner portion 112 is provided with two, and in the extending direction along the length of the heat exchange portion 111 (it can be understood that, along the arrangement direction of the plurality of electric cores 2 in the same battery unit), the corner portion 112 is located between the liquid inlet 131 and the liquid outlet 132 of the same flow channel 13, so that the two joint portions 113 are different in the S-shaped cooling tube, and the liquid inlet 131 and the liquid outlet 132 are exposed to the outside, so that the access of the cooling circulation system is facilitated, and the obstruction or collision is avoided.

In other preferred embodiments, the number of heat exchanging portions 111 in the same tube 11 may be five, seven, etc., and the number of corner portions 112 may be four, six, etc., so that the purpose of using an odd number of heat exchanging portions 111 is to make the two joint portions 113 in the tube 11 different. Of course, the number of heat exchanging portions 111 is three optimum.

In summary, the above-mentioned related plurality of cooling pipes 1, the plurality of battery cells, and the related number of the three heat exchange portions 111 included in each cooling pipe 1 are set, and the positions of the liquid inlet 131 and the liquid outlet 132 exposed to the outside are set, in this integration scheme, a battery module that can effectively improve the temperature uniformity of all the battery cells 2 (i.e. between the same row of battery cells 2 and between the different rows of battery cells 2), and that is convenient for the cooling circulation system to access (if the number of the heat exchange portions 111 is even, the liquid inlet 131 and the liquid outlet 132 will be on the same side of the battery cells, and the connection is inconvenient) can be obtained.

Preferably, the heat exchange portion 111, the corner portion 112, and the joint portion 113 are integrally formed. In particular, the heat exchange portion 111, the corner portion 112 and the joint portion 113 are formed by bending the same hollow flat plate; of course, the heat exchange portion 111, the corner portion 112, and the joint portion 113 may also be formed by welding.

Example 2

Referring to fig. 5 and 6, the present embodiment discloses a cooling tube 1, and the cooling tube 1 can be applied to a battery module as well, and the cooling tube 1 of the present embodiment differs from the cooling tube 1 of the embodiment 1 only in that: the cooling tube 1 of the present embodiment is elongated as a whole, whereas the cooling tube 1 of embodiment 1 is S-shaped as a whole.

The cooling tube 1 of this embodiment includes a tube body 11 and at least one partition board 12 as in embodiment 1, the tube body 11 has an inner cavity, the partition board 12 is connected in the inner cavity of the tube body 11, the partition board 12 divides the inner cavity of the tube body 11 into at least two layers of independent flow channels 13 (i.e. different flow channels 13 are isolated to be used for cooling medium circulation independently, no cooling medium in any flow channel 13 flows into other flow channels 13), all flow channels 13 in the cooling tube 1 can be used for heat exchange with the same electric core 2, two ends of each flow channel 13 are respectively provided with a liquid inlet 131 and a liquid outlet 132 for independent liquid inlet and outlet, and the flowing directions of the cooling medium of two adjacent flow channels 13 are opposite.

Therefore, when the cooling tube 1 of the present embodiment is applied to a battery module to radiate heat from the battery cells, the same technical problems as those of embodiment 1 can be solved as well, and the same effects can be achieved: the heat dissipation effect of at least two layers of flow channels 13 which are independent from each other and have opposite flow directions in the cooling pipe 1 on the same battery cell 2 is utilized to balance the problem of uneven heat dissipation efficiency of different battery cells 2 caused by temperature rise of a cooling medium, so that the temperature consistency of different battery cells 2 is improved, the service life of the battery cells 2 is prolonged, and the heat balance of the battery module is solved.

The differences from example 1 are embodied in: in this embodiment, the tube 11 includes a heat exchange portion 111 and two joint portions 113, the two joint portions 113 are respectively connected to two ends of the heat exchange portion 111, the heat exchange portion 111 and the joint portions 113 together enclose an inner cavity, and the liquid inlet 131 and the liquid outlet 132 are located at the joint portions 113. At this time, when the cooling tube 1 of the present embodiment is applied to the battery module, the cooling tube 1 may be positioned between two adjacent battery cells, or the cooling tube 1 may be positioned at the outermost side of a plurality of aligned battery cells.

For other technical features and technical effects similar to those of embodiment 1 shown in the drawings of this embodiment, the description of this embodiment will not be repeated, and reference should be made to the related description of embodiment 1.

The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features. It should be noted that modifications and adaptations to the utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims (10)

1. A battery module, comprising:

the battery unit comprises at least two battery cores which are sequentially arranged;

at least one cooling tube, the cooling tube is located at least one side of battery cell, the cooling tube includes at least one baffle and has the body of inner chamber, the baffle set up in the inner chamber of body, the baffle will the inner chamber of body is separated into at least two-layer runner, two-layer the runner is independent and is used for carrying out the heat exchange to same electric core each other the both ends of runner all are equipped with inlet and liquid outlet in order to be used for independent inlet and liquid, and adjacent two-layer the coolant flow direction of runner is opposite.

2. The battery module according to claim 1, wherein the cells are cylindrical cells, adjacent two of the cylindrical cells are arranged in a radial direction thereof, and an arrangement direction of all the flow channels in the cooling tube is identical to a height direction of the cylindrical cells.

3. The battery module of claim 1, further comprising a thermally conductive silicone pad, wherein two opposite sides of the thermally conductive silicone pad are respectively attached to sides of the tube and sides of the battery cell.

4. The battery module of claim 1, wherein at least one outer sidewall of the tube is provided with a groove for mating with a side of the cell.

5. The battery module according to claim 1, wherein the pipe body has a flat bar shape, the flow direction of the flow channels is identical to the extending direction of the pipe body, and the arrangement direction of all the flow channels is identical to the width direction of the pipe body.

6. The battery module according to any one of claims 1 to 5, wherein the battery cells are provided with a plurality of cooling pipes and are arranged at intervals along a first direction, the pipe body comprises at least three heat exchange portions, at least two corner portions and two joint portions, all the heat exchange portions are arranged at intervals along the first direction, the corner portions connect adjacent two heat exchange portions to form an S-shaped structure in series, the two joint portions are respectively connected to two ends of the S-shaped structure, the heat exchange portions, the corner portions and the joint portions jointly enclose the inner cavity, the liquid inlet and the liquid outlet are located at the joint portions, and each battery cell is located between the adjacent two heat exchange portions of the same cooling pipe or between the heat exchange portions of the adjacent two cooling pipes.

7. The battery module according to claim 6, wherein the heat exchange portion, the corner portion, and the tab portion are integrally formed.

8. The battery module according to claim 6, wherein the number of the heat exchange portions is an odd number of 3 or more, the number of the corner portions is one less than the number of the heat exchange portions, and the corner portions are located between the liquid inlet and the liquid outlet of the same flow channel in a length extending direction of the heat exchange portions.

9. The battery module of claim 6, wherein at least a portion of the liquid inlet and at least a portion of the liquid outlet extend through opposite sides of the tab portion.

10. A battery pack, wherein the battery module according to any one of claims 1 to 9 is applied.