Battery module and electric device

Abstract

The utility model discloses a battery module and a power utilization device, and relates to the technical field of batteries. The battery module comprises a plurality of single batteries, a plurality of partition plates distributed at intervals, a supporting structure arranged at the bottoms of the single batteries, and a driving part. A containing space used for containing the single batteries is formed between every two adjacent partition plates, a confluence channel and two air inlet channels are defined by the partition plates and the side walls of the single batteries, and the confluence channel is communicated between the two air inlet channels. The supporting structure defines an air outlet channel communicating with the confluence channel, and the driving piece is arranged at the air outlet channel and used for sucking airflow into the two air inlet channels and blowing the airflow out of the air outlet channel. According to the battery module provided by the invention, an air outlet channel between the two single battery packs is canceled, and the air outlet channel is arranged by using the existing supporting structure, so that the space of the battery module in the horizontal direction is saved, the single batteries can be arranged more compactly, and the energy density of the battery module is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery module and an electrical device. Background Art

[0002] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present disclosure, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art known to those skilled in the art.

[0003] In the related art, the battery module includes an outer shell and a supporting structure. A plurality of single cells are arranged in two groups inside the outer shell. The supporting structure is supported on the bottom of the outer shell. Air inlet channels are arranged on two opposite horizontal sides of the outer shell, and an air outlet channel is arranged between the two groups of single cell groups. Driven by the fan, air is taken in from two opposite horizontal sides of the battery module and air is discharged from the air outlet channel between the two groups of single cell groups, thereby performing air cooling and heat dissipation on each single cell.

[0004] However, in this heat dissipation method of taking in air from two opposite horizontal sides and discharging air from between two groups of single battery packs, the air outlet channel will occupy space in the horizontal direction, resulting in insufficient structural compactness of the battery module, thereby reducing the energy density of the battery module. Utility Model Content

[0005] In view of this, the purpose of the present application is to provide a battery module and an electrical device, aiming to solve the technical problems in the prior art that the battery module has insufficient structural compactness and reduces the energy density of the battery module.

[0006] To achieve the above objectives, the technical solutions adopted in this application are as follows:

[0007] In a first aspect, an embodiment of the present application provides a battery module, comprising:

[0008] Multiple single cells;

[0009] A plurality of partitions are spaced apart along a first direction, a receiving space for placing the single battery is formed between two adjacent partitions, the partitions and the side walls of the single battery define a converging channel and two air inlet channels, the air inlet channels are extended along a second direction, the second direction is perpendicular to the first direction, and the converging channel is connected between the two air inlet channels;

[0010] A support structure, disposed at the bottom of the plurality of single cells, wherein the support structure defines an air outlet channel connected to the converging channel;

[0011] The driving member is arranged at the air outlet channel, and is used for sucking the airflow into the two air inlet channels along the second direction, and blowing the airflow out from the air outlet channel.

[0012] In one embodiment of the first aspect, each of the air inlet channels includes a plurality of air inlet sub-channels, the plurality of air inlet sub-channels are spaced apart along a third direction, the third direction is perpendicular to the first direction and the second direction, and each of the air inlet sub-channels is connected to the confluence channel.

[0013] In one of the embodiments of the first aspect, at least one of the air inlet sub-channels is provided with a notch at one end away from the confluence channel.

[0014] In one embodiment of the first aspect, each of the air inlet sub-channels includes a straight section and a curved section that are connected to each other, and the curved section is bent in a direction close to the air outlet channel and is connected to the converging channel.

[0015] In one embodiment of the first aspect, a length of the straight line segment close to the air outlet channel is smaller than a length of the straight line segment far from the air outlet channel.

[0016] In one of the embodiments of the first aspect, a lower arc surface is provided on a side of the curved section close to the air outlet channel, and an upper arc surface is provided on a side of the curved section away from the air outlet channel, the arc radius of the upper arc surface is R1, and the arc radius of the lower arc surface is R2, satisfying: R2>R1.

[0017] In one embodiment of the first aspect, the following is satisfied: 20 mm ≤ R2 ≤ 50 mm.

[0018] In one embodiment of the first aspect, the sum of the volumes of the two air inlet channels on each partition is V1, and the volume of the confluence channel on each partition is V2, satisfying: 1≤V1 / V2≤5.

[0019] In one embodiment of the first aspect, the confluence channel includes two confluence sub-channels spaced apart along the second direction, each of the confluence sub-channels is communicated with one of the air inlet channels, and each of the confluence sub-channels is communicated with the air outlet channel.

[0020] In one embodiment of the first aspect, a projection area of ​​each of the confluence sub-channels in a third direction gradually increases in a direction approaching the air outlet channel, and the third direction is perpendicular to the first direction and the second direction.

[0021] In one embodiment of the first aspect, the partition includes a first plate body and a second plate body, the first plate body is located between two adjacent single cells in the first direction, the second plate body is connected to the middle of the first plate body and is located between two adjacent single cells in the second direction, and the first plate body and the side walls of the single cells define the confluence channel and the two air inlet channels.

[0022] In one embodiment of the first aspect, the battery module further includes two end plates, one of which is connected to one side of the support structure along the first direction, and the other end plate is connected to the other side of the support structure along the first direction.

[0023] In a second aspect, an embodiment of the present application further provides an electrical device, comprising the battery module described in any of the above embodiments.

[0024] The beneficial effects of this application are:

[0025] The present application provides a battery module, including a plurality of single cells, a plurality of partitions, a support structure and a driving member. A confluence channel and two air inlet channels are defined by the side walls of the partitions and the single cells, and the confluence channel is connected between the two air inlet channels. On this basis, the air outlet channel is arranged on the supporting structure located at the bottom of the single cells, so that under the drive of the driving member, air can enter from two opposite horizontal sides of the battery module and exhaust from the air outlet channel of the supporting structure. The battery module provided by the present application eliminates the air outlet channel between the two groups of single cells and uses the existing supporting structure to arrange the air outlet channel, thus saving space in the horizontal direction of the battery module, allowing the single cells to be arranged more compactly, and improving the energy density of the battery module.

[0026] In order to make the above-mentioned objects, features and advantages of the present application more obvious and understandable, preferred embodiments are given below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 A schematic diagram of the three-dimensional structure of a battery module in some embodiments of the present application is shown;

[0029] Figure 2A schematic diagram of the exploded structure of a battery module in some embodiments of the present application is shown;

[0030] Figure 3 A schematic diagram of the structure of a battery module from one perspective in some embodiments of the present application is shown;

[0031] Figure 4 Shows Figure 3 Schematic diagram of the cross-sectional structure at AA in the middle;

[0032] Figure 5 A schematic diagram of the three-dimensional structure of the partition in some embodiments of the present application is shown.

[0033] Description of main component symbols:

[0034] 100-battery module; 110-single cell; 111-pole; 120-partition; 121-first plate; 122-second plate; 123-accommodating space; 124-air inlet channel; 1241-air inlet sub-channel; 12411-straight section; 12412-curved section; 124121-upper arc surface; 124122-lower arc surface; 125-convergence channel; 1251-convergence sub-channel; 126-gap; 130-support structure; 131-air outlet channel; 140-driving member; 150-end plate; x-first direction; y-second direction; z-third direction. DETAILED DESCRIPTION

[0035] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0036] In the description of the present application, 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 application 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 application.

[0037] 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0038] In this application, 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 connection; it can be a mechanical connection or an electrical connection; 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. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] In the present application, 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.

[0040] like Figure 1 As shown, an embodiment of the present application provides a battery module 100, which relates to the field of battery technology. For the convenience of description, the length direction of the battery module 100 is defined as the first direction x, the width direction of the battery module 100 is defined as the second direction y, and the height direction of the battery module 100 is defined as the third direction z. It should be noted that the above definitions are only for the convenience of understanding the relative position relationship of each part in the battery module 100, and should not be understood as a limitation to the present application.

[0041] Combination Figures 2 to 3 As shown, the battery module 100 mainly includes: a plurality of single batteries 110 , a plurality of partitions 120 , a support structure 130 and a driving member 140 .

[0042] Among them, multiple partitions 120 are distributed at intervals along the first direction x, and a accommodating space 123 for placing the single battery 110 is formed between two adjacent partitions 120. The side walls of the partitions 120 and the single battery 110 define a confluence channel 125 and two air inlet channels 124. The air inlet channel 124 extends along the second direction y, and the second direction y is perpendicular to the first direction x. The confluence channel 125 is connected between the two air inlet channels 124.

[0043] The support structure 130 is disposed at the bottom of the plurality of single cells 110, and defines an outlet channel 131 connected to the confluence channel 125. The driving member 140 is disposed at the outlet channel 131, and is used to draw air into the two air inlet channels 124 along the second direction y, and blow the air out from the outlet channel 131.

[0044] It should be noted that when the plurality of single cells 110 are distributed at intervals along the first direction x, each accommodation space 123 is used to place one single cell 110. When the plurality of single cells 110 are distributed in a rectangular array, each accommodation space 123 is used to place at least two single cells 110.

[0045] It should be mentioned that "the support structure 130 is disposed at the bottom of the plurality of single cells 110", which means that the single cell 110 has a top and a bottom along the third direction z, the third direction z is perpendicular to the first direction x and the second direction y, the top of the single cell 110 has a pole 111, and the support structure 130 is located on a side away from the pole 111 of the single cell 110. The support structure 130 is used to support the partition 120 and the single cell 110 to bear the weight of the partition 120 and the single cell 110, and at the same time, facilitates the installation of the battery module 100 in the electrical device.

[0046] Exemplarily, the driving member 140 may be a fan, a blower or other element capable of driving air flow.

[0047] In the related art, the battery module adopts a heat dissipation method in which air enters from two opposite sides horizontally and exhausts air from between two groups of single battery cells to cool the single cells. However, the air outlet duct will occupy the horizontal space of the battery module, resulting in insufficient structural compactness of the battery module, thereby reducing the energy density of the battery module. In addition, since the single cell is usually hotter at the top and colder at the bottom, that is, the temperature is high at the position close to the pole 111, and the temperature is low at the position far from the pole 111. This temperature difference phenomenon will reduce the performance and service life of the single cell.

[0048] It can be understood that the battery module 100 provided in this embodiment defines a converging channel 125 and two air inlet channels 124 by making the partition 120 and the side wall of the single battery 110, and making the converging channel 125 communicate between the two air inlet channels 124. On this basis, the air outlet channel 131 is arranged on the support structure 130 located at the bottom of the single battery 110, so that under the drive of the driving member 140, air is inletted from the two opposite horizontal sides of the battery module 100, and air is discharged from the air outlet channel 131 of the support structure 130. Since the air outlet channel between the two groups of single batteries mentioned in the related art is cancelled, the air outlet channel 131 is arranged using the existing support structure 130, which saves the space of the battery module 100 in the horizontal direction, that is, saves the space of the battery module 100 in the second direction y, so that the single battery 110 can be arranged more compactly, and the energy density of the battery module 100 is improved.

[0049] At the same time, due to the provision of the confluence channel 125, after the airflows of the two air inlet channels 124 converge into the confluence channel 125, the airflow will flow into the air outlet channel 131 in the confluence channel 125 along the top to the bottom direction of the single cell 110. In this process, the airflow in the confluence channel 125 first passes through the hotter area at the top of the single cell 110, and then passes through the colder area at the bottom of the single cell 110. This can achieve a certain temperature equalization effect, that is, reduce the temperature difference between the top and bottom of the single cell 110, thereby improving the performance and service life of the single cell 110.

[0050] Combination Figure 1 and Figure 2 As shown, in one embodiment, each air inlet channel 124 includes a plurality of air inlet sub-channels 1241, and the plurality of air inlet sub-channels 1241 are spaced apart along the third direction z, the third direction z is perpendicular to the first direction x and the second direction y, and each air inlet sub-channel 1241 is connected to the confluence channel 125. In this way, under the drive of the driving member 140, the airflow of the external environment can be dispersed into the plurality of air inlet sub-channels 1241, and then each dispersed part of the airflow is heat exchanged with the side wall of the single cell 110 respectively, and then merged into the confluence channel 125, and continues to heat exchange with the side wall of the single cell 110 in the confluence channel 125, and finally flows into the air outlet channel 131. It can be understood that dividing the air inlet channel 124 into a plurality of air inlet sub-channels 1241 can increase the flow rate of the airflow, thereby improving the heat exchange efficiency between the external environment and the single cell 110, and improving the heat dissipation effect of the single cell 110.

[0051] like Figure 4 and Figure 5As shown, in a specific embodiment, each air inlet sub-channel 1241 includes a connected straight section 12411 and a curved section 12412, and the curved section 12412 is bent in a direction close to the air outlet channel 131 and is connected to the confluence channel 125. In this way, under the drive of the driving member 140, the airflow first flows into the straight section 12411, and then flows into the confluence channel 125 under the guidance of the curved section 12412. It can be understood that the setting of the curved section 12412 plays a guiding role, so that the airflow can flow into the confluence channel 125 more smoothly, reducing the resistance of the airflow during the flow process, increasing the flow rate of the airflow, and thus improving the heat exchange efficiency between the external environment and the single battery 110.

[0052] like Figure 4 As shown, further, the length of the straight segment 12411 close to the air outlet channel 131 is shorter than the length of the straight segment 12411 far from the air outlet channel 131. That is, the closer the length of the straight segment 12411 is to the air outlet channel 131, the shorter it is, so that the contact area between the top area of ​​the single battery 110 and the airflow is larger, while the contact area between the bottom area of ​​the single battery 110 and the airflow is smaller. Since the heat dissipation efficiency is higher at the location with a larger contact area, this is conducive to reducing the temperature difference between the top and bottom of the single battery 110 and improving the temperature consistency of the single battery 110.

[0053] Combination Figure 4 and Figure 5 As shown, further, a lower arc surface 124122 is provided on the side of the curved section 12412 close to the air outlet channel 131, and an upper arc surface 124121 is provided on the side of the curved section 12412 away from the air outlet channel 131, the arc radius of the upper arc surface 124121 is R1, and the arc radius of the lower arc surface 124122 is R2, satisfying: R2>R1.

[0054] In this embodiment, a lower arc surface 124122 is set on the side of the curved section 12412 close to the air outlet channel 131, and an upper arc surface 124121 is set on the side of the curved section 12412 away from the air outlet channel 131. At the same time, R2>R1, that is, the arc radius of the lower arc surface 124122 is larger than the arc radius of the upper arc surface 124121. In this way, the resistance encountered by the airflow in the process of transitioning from the straight section 12411 through the curved section 12412 to the confluence channel 125 can be reduced, thereby improving the heat exchange efficiency between the external environment and the single battery 110.

[0055] like Figure 4As shown, further, it satisfies: 20mm≤R2≤50mm. For example, the arc radius R2 of the lower arc surface 124122 is selected as 35mm. Of course, the arc radius R2 of the lower arc surface 124122 can also be selected as 20mm, 22mm, 23mm, 25mm, 28mm, 30mm, 32mm, 33mm, 34mm, 35.5mm, 36mm, 37mm, 40mm, 43mm, 46mm, 49mm, 50mm, etc.

[0056] It should be noted that if the arc radius R2 of the lower arc surface 124122 is too large, the airflow will enter the converging channel 125 and encounter increased resistance in the process of flowing from the converging channel 125 into the air outlet channel 131, which is not conducive to improving the heat dissipation effect of the single battery 110. If the arc radius R2 of the lower arc surface 124122 is too small, the airflows of the two adjacent curved sections 12412 will affect each other's flow rate when entering the converging channel 125, which is also not conducive to improving the heat dissipation effect of the single battery 110.

[0057] For example, a temperature sensor may be arranged at the top of the single battery 110 to test the influence of different arc radii R2 of the lower arc surface 124122 on the heat dissipation effect of the single battery 110 .

[0058] In this embodiment, by controlling the arc radius R2 of the lower arc surface 124122 within the range of 20 mm to 50 mm, the resistance to the airflow can be effectively reduced, and the smoothness of the airflow can be improved, thereby improving the heat dissipation effect on the single battery 110.

[0059] like Figure 4 and Figure 5 As shown, in a specific embodiment, a notch 126 is provided at one end of at least one air inlet sub-channel 1241 away from the confluence channel 125, and the notch 126 can guide the airflow into the air inlet channel 124 to increase the air intake volume of the air inlet channel 124, thereby improving the heat dissipation effect on the single battery 110.

[0060] Exemplarily, the notch 126 may be provided on one air inlet sub-channel 1241 . Of course, the notch 126 may also be provided on a plurality of air inlet sub-channels 1241 .

[0061] It should be understood that the air inlet channel 124 is not limited to the above-mentioned multiple air inlet sub-channels 1241. In another embodiment, the air inlet channel 124 can also be a combination of one or more of a serpentine air duct, a wavy air duct, a spiral air duct, and a ring-shaped air duct. No specific limitation is made on the structure of the air inlet channel 124 herein.

[0062] In one embodiment, the sum of the volumes of the two air inlet channels 124 on each partition 120 is V1, and the volume of the confluence channel 125 on each partition 120 is V2, satisfying: 1≤V1 / V2≤5.

[0063] Exemplarily, V1 / V2 can be selected as 1, 1.3, 1.5, 1.8, 2, 2.1, 2.4, 2.5, 2.8, 3, 3.5, 3.9, 4, 4.2, 4.6, 5, etc. By arranging a temperature sensor at the top of the single battery 110, the influence of different V1 / V2 on the heat dissipation effect of the single battery 110 can be tested.

[0064] It should be noted that if V1 / V2 is too small, the air intake of the battery module 100 will be insufficient, thereby reducing the heat exchange efficiency between the single battery 110 and the external environment. If V1 / V2 is too large, the air velocity in the air intake channel 124 will be too low, which will also reduce the heat exchange efficiency between the single battery 110 and the external environment.

[0065] In this embodiment, the sum of the volumes V1 of the two air inlet channels 124 is 1 to 5 times the volume V2 of the confluence channel 125, so that the battery module 100 has sufficient air intake volume and air flow rate, thereby improving the heat exchange efficiency between the single cell 110 and the external environment, and improving the heat dissipation effect of the single cell 110.

[0066] It should be noted that, when the air inlet channel 124 includes multiple air inlet sub-channels 1241 , V1 in the above relationship “V1 / V2” is the sum of the volumes of the multiple air inlet sub-channels 1241 of one air inlet channel 124 and the multiple air inlet sub-channels 1241 of another air inlet channel 124 .

[0067] like Figure 4 As shown, in one embodiment, the confluence channel 125 includes two confluence sub-channels 1251 spaced apart along the second direction y, each confluence sub-channel 1251 is connected to an air inlet channel 124 , and each confluence sub-channel 1251 is connected to an air outlet channel 131 .

[0068] In this embodiment, the confluence channel 125 is divided into two confluence sub-channels 1251 spaced apart along the second direction y, so that the airflows of the two air inlet channels 124 can be dispersed through the two confluence sub-channels 1251 and flow into the air outlet channel 131, thereby increasing the flow rate of the airflow from the confluence channel 125 into the air outlet channel 131, thereby increasing the heat exchange efficiency between the single cell 110 and the external environment.

[0069] It should be noted that, when the confluence channel 125 includes two confluence sub-channels 1251 spaced apart along the second direction y, V2 in the above relationship “V1 / V2” is the sum of the volumes of the two confluence sub-channels 1251 .

[0070] Continue reading Figure 4 Furthermore, the projected area of ​​each converging sub-channel 1251 in the third direction z gradually increases in the direction close to the air outlet channel 131, and the third direction z is perpendicular to the first direction x and the second direction y, that is, the space of the converging sub-channel 1251 gradually expands in the direction of the air outlet channel 131. In this way, the resistance encountered by the airflow in the process of flowing into the air outlet channel 131 can be reduced, and the flow rate of the airflow can be increased, thereby improving the heat exchange efficiency between the single battery 110 and the external environment.

[0071] In another embodiment, the converging channel 125 may also be a combination of one or more of a serpentine air duct, a wavy air duct, a spiral air duct, and a ring air duct.

[0072] like Figure 5 As shown, in one embodiment, the partition 120 includes a first plate body 121 and a second plate body 122, the first plate body 121 is located between two adjacent single cells 110 in a first direction x, the second plate body 122 is connected to the middle portion of the first plate body 121, and is located between two adjacent single cells 110 in a second direction y, and the side walls of the first plate body 121 and the single cells 110 define a confluence channel 125 and two air inlet channels 124.

[0073] In this embodiment, the first plate 121 is located between two adjacent single cells 110 in the first direction x, and is used to isolate the two adjacent single cells 110 in the first direction x. The second plate 122 is located between two adjacent single cells 110 in the second direction y, and is used to isolate the two adjacent single cells 110 in the second direction y. In this way, the risk of heat from one single cell 110 spreading to another single cell 110 when thermal runaway occurs can be effectively reduced, thereby improving the safety of the battery module 100.

[0074] Furthermore, a heat insulation layer is provided between two adjacent first plates 121 , and the heat insulation layer can provide a further heat insulation effect, thereby further reducing the risk of thermal runaway spreading to other single cells 110 .

[0075] like Figure 1 and Figure 2As shown, in one embodiment, the battery module 100 also includes two end plates 150, one of which is connected to one side of the support structure 130 along the first direction x, and the other end plate 150 is connected to the other side of the support structure 130 along the first direction x. The two end plates 150 support the multiple single cells 110 and the multiple partitions 120, which can increase the structural strength of the battery module 100, thereby improving the safety of the battery module 100.

[0076] In a second aspect, the embodiments of the present application further provide an electric device, including the battery module 100 in any of the above embodiments. The electric device may be an energy storage device, and of course, may also be an electric car, a ship, a spacecraft, and the like.

[0077] It is understandable that, since the electrical device provided in this embodiment has the battery module 100 in any of the above embodiments, it has all the beneficial effects of the battery module 100, which will not be listed one by one here.

[0078] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means 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 application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described 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.

[0079] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A battery module, characterized in that: include: A plurality of single cells (110); A plurality of partitions (120) are spaced apart and distributed along a first direction (x); a receiving space (123) for placing the single battery (110) is formed between two adjacent partitions (120); the partitions (120) and the side walls of the single battery (110) define a converging channel (125) and two air inlet channels (124); the air inlet channels (124) are extended along a second direction (y), the second direction (y) is perpendicular to the first direction (x), and the converging channel (125) is connected between the two air inlet channels (124); A support structure (130) is disposed at the bottom of the plurality of single cells (110), the support structure (130) defining an air outlet channel (131) in communication with the converging channel (125); The driving member (140) is arranged at the air outlet channel (131) and is used to draw the airflow into the two air inlet channels (124) along the second direction (y) and blow the airflow out from the air outlet channel (131).

2. The battery module according to claim 1, characterized in that: Each of the air inlet channels (124) comprises a plurality of air inlet sub-channels (1241), the plurality of air inlet sub-channels (1241) are spaced apart along a third direction (z), the third direction (z) is perpendicular to the first direction (x) and the second direction (y), and each of the air inlet sub-channels (1241) is connected to the confluence channel (125).

3. The battery module according to claim 2, characterized in that: At least one of the air inlet sub-channels (1241) is provided with a notch (126) at one end away from the converging channel (125).

4. The battery module according to claim 2, characterized in that: Each of the air inlet sub-channels (1241) comprises a connected straight section (12411) and a curved section (12412); the curved section (12412) is bent in a direction close to the air outlet channel (131) and is connected to the converging channel (125).

5. The battery module according to claim 4, characterized in that: The length of the straight line segment (12411) close to the air outlet channel (131) is shorter than the length of the straight line segment (12411) far from the air outlet channel (131).

6. The battery module according to claim 4, characterized in that: A lower arc surface (124122) is provided on the side of the curved section (12412) close to the air outlet channel (131), and an upper arc surface (124121) is provided on the side of the curved section (12412) away from the air outlet channel (131), the arc radius of the upper arc surface (124121) is R1, and the arc radius of the lower arc surface (124122) is R2, satisfying: R2>R1.

7. The battery module according to claim 6, characterized in that: Meets: 20mm≤R2≤50mm.

8. The battery module according to claim 1, characterized in that: The sum of the volumes of the two air inlet channels (124) on each of the partitions (120) is V1, and the volume of the converging channels (125) on each of the partitions (120) is V2, satisfying: 1≤V1 / V2≤5.

9. The battery module according to any one of claims 1 to 8, characterized in that: The confluence channel (125) comprises two confluence sub-channels (1251) spaced apart along the second direction (y), each of the confluence sub-channels (1251) being connected to one of the air inlet channels (124), and each of the confluence sub-channels (1251) being connected to the air outlet channel (131).

10. The battery module according to claim 9, characterized in that: The projected area of ​​each of the confluence sub-channels (1251) in the third direction (z) gradually increases in a direction approaching the air outlet channel (131), and the third direction (z) is perpendicular to the first direction (x) and the second direction (y).

11. The battery module according to any one of claims 1 to 8, characterized in that: The partition (120) comprises a first plate body (121) and a second plate body (122), wherein the first plate body (121) is located between two adjacent single cells (110) in the first direction (x), and the second plate body (122) is connected to the middle of the first plate body (121) and is located between two adjacent single cells (110) in the second direction (y), and the first plate body (121) and the side walls of the single cells (110) define the confluence channel (125) and the two air inlet channels (124).

12. The battery module according to any one of claims 1 to 8, characterized in that: The battery module also includes two end plates (150), one of which is connected to one side of the support structure (130) along the first direction (x), and the other end plate (150) is connected to the other side of the support structure (130) along the first direction (x).

13. An electrical device, characterized in that: A battery module comprising any one of claims 1 to 12.

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