Air-cooled battery box with air duct system

Abstract

The utility model discloses an air-cooled battery box with an air duct system, which belongs to the technical field of battery boxes, and comprises a shell, and the shell comprises two air inlet wall plates and an air outlet; the two modules are arranged in the shell, the two air inlet wall plates are located on the two sides of the two modules respectively, a main air duct is arranged between the two modules, and the air outlet is located at one end of the main air duct; each module comprises a plurality of battery cells and two end plates, a first air duct plate is arranged between every two adjacent battery cells, a second air duct plate is arranged between each end plate and the adjacent battery cell, and cold air enters the shell from the air inlet wall plates on the two sides of the two modules and penetrates through the first air duct plates and the second air duct plates to bring heat among the battery cells into the main air duct; and finally, the heat passes through the air outlet to take out the heat under the action of the cooling fan. The air-cooled battery box can reduce the temperature in the battery box, improve the charging efficiency and power of the battery and prolong the service life of the battery.

Description

Technical Field

[0001] The utility model relates to the technical field of battery boxes, in particular to an air-cooled battery box with an air duct system. Background Art

[0002] A battery box is a device used to store and protect batteries. It is usually made of strong materials and has the appropriate size and structure to accommodate the batteries. It is designed to provide the physical protection, electrical isolation and temperature control required by the batteries.

[0003] Thermal management of battery boxes has always been a key focus of battery box design and battery box application. Since batteries generate heat during the charging and discharging process, if the battery box's heat dissipation system is not sufficient to effectively cool the batteries, the temperature may rise, causing battery performance to deteriorate, shortening life, and even causing safety issues. Utility Model Content

[0004] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an air-cooled battery box with an air duct system, which can enable air flow inside the battery box, thereby improving the temperature rise and temperature difference problems of the battery box.

[0005] According to the embodiment of the utility model, the air-cooled battery box with an air duct system includes a shell, the shell includes two air inlet panels and an air outlet, the two air inlet panels are arranged opposite to each other, and the air outlet is provided with a cooling fan; two modules, both of which are arranged in the shell, the two air inlet panels are respectively located on both sides of the two modules, a main air duct is arranged between the two modules, the main air duct and the two air inlet panels are all arranged along the length direction of the modules, and the air outlet is located at one end of the main air duct; the module includes a plurality of battery cells and two end plates, the plurality of battery cells are arranged in sequence between the two end plates, a first air duct plate is arranged between two adjacent battery cells, and a second air duct plate is arranged between the end plate and the adjacent battery cells, cold air enters the shell from the air inlet panels on both sides of the two modules, passes through the first air duct plate and the second air duct plate to bring the heat between the plurality of battery cells to the main air duct, and finally passes through the air outlet under the action of the cooling fan to bring the heat out.

[0006] The air-cooled battery box with an air duct system according to the embodiment of the utility model has at least the following beneficial effects: cold air enters the shell from the air inlet wall plates on both sides of the two modules, and passes through the first air duct plate and the second air duct plate to bring the heat between the several battery cells into the main air duct, and finally passes through the air outlet under the action of the cooling fan to bring the heat out, so that the internal air flow of the battery box can circulate, so as to reduce the temperature inside the battery box, thereby improving the charging efficiency and power of the battery and extending its service life.

[0007] According to some embodiments of the utility model, an air hole group is arranged on the air inlet wall plate, the number of the air hole groups on each air inlet wall plate corresponds to the total number of the first air duct plates and the second air duct plates on each module, several air hole groups are evenly distributed along the length direction of the module, and each first air duct plate and each second air duct plate are arranged corresponding to an air hole group.

[0008] According to some embodiments of the utility model, the air hole group includes two end holes and a long hole arranged between the two end holes, and the long hole and the two end holes are arranged along a length direction perpendicular to the air inlet wall plate.

[0009] According to some embodiments of the present invention, the areas of the plurality of end holes gradually increase in a direction away from the air outlet, and the areas of the plurality of long holes gradually increase in a direction away from the air outlet.

[0010] According to some embodiments of the utility model, the first air duct plate includes: a first frame, the first frame is arranged on the shell, the shape of the first frame corresponds to the battery cell, the first frame is symmetrically provided with two first limiting grooves, the two first limiting grooves are respectively used to accommodate two adjacent battery cells to limit the positions of the battery cells; a first overhead part, the first overhead part is evenly arranged at the bottom of the first limiting groove, the first overhead part is against the battery cell, the battery cell and the bottom of the first limiting groove are enclosed to form a first air duct, the first air duct is connected with the outside through the air inlet wall plate, the first air duct is connected with the main air duct, the cold air passes through the air inlet wall plate into the first air duct, and then brings the heat into the main air duct.

[0011] According to some embodiments of the utility model, the second air duct plate includes: a second frame, the second frame is arranged on the shell, the shape of the second frame corresponds to the battery cell, the second frame is provided with a second limiting groove, the second limiting groove is used to accommodate the battery cell adjacent to the end plate to limit the position of the battery cell; a second overhead part, the second overhead part is evenly arranged at the bottom of the second limiting groove, the second overhead part is against the battery cell, the battery cell and the bottom of the second limiting groove are enclosed to form a secondary air duct, the secondary air duct is connected with the outside through the air inlet wall plate, the secondary air duct is connected with the main air duct, the cold air passes through the air inlet wall plate into the secondary air duct, and then brings the heat into the main air duct.

[0012] According to some embodiments of the utility model, the shell also includes: two cover plates, two air inlet wall plates are arranged between the two cover plates; two side wall plates, two side wall plates are arranged between the two cover plates, the two cover plates, the two side wall plates and the two air inlet wall plates are interconnected and enclosed to form a cavity, the two modules are located in the cavity, and the air inlet is arranged on one of the side wall plates.

[0013] According to some embodiments of the present invention, a fixing component is further included, and the fixing component is used to limit the positions of the battery core, the first air duct plate and the second air duct plate.

[0014] According to some embodiments of the utility model, the fixing assembly includes: a plurality of fixing grooves, which are arranged on the module and extend along the length direction of the module; a fixing plate, the number of the fixing plates corresponds to the number of the fixing grooves, one end of each fixing plate is fixed on one of the end plates, and the other end passes through the fixing groove and is fixed on the other end plate.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0017] Figure 1 This is a schematic structural diagram of an air-cooled battery box with an air duct system according to an embodiment of the utility model;

[0018] Figure 2 for Figure 1 Structural schematic diagram of the middle air inlet wall plate, the first air duct plate, the second air duct plate and the main air duct;

[0019] Figure 3 for Figure 1 A schematic diagram of the structure of the first air duct plate;

[0020] Figure 4 for Figure 1 A schematic diagram of the structure of the second air duct plate near the end plate;

[0021] Figure 5 for Figure 1 A schematic diagram of the structure of the second air duct plate away from the end plate;

[0022] Figure 6 for Figure 1 Schematic diagram of the structure of the medium module.

[0023] Reference numerals:

[0024] Housing 100, air inlet wall plate 110, air hole group 111, end hole 112, long hole 113, air outlet 120, cooling fan 121, cover plate 130, side wall plate 140;

[0025] Module 200, main air duct 210, battery cell 220, end plate 230, first air duct plate 240, first frame 241, first limiting groove 241a, first overhead part 242, second air duct plate 250, second frame 251, second limiting groove 251a, second overhead part 252, fixing assembly 260, fixing groove 261, fixing plate 262. DETAILED DESCRIPTION

[0026] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0027] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a first or second description, it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0030] refer to Figures 1 to 6 An air-cooled battery box with an air duct system according to an embodiment of the utility model is described.

[0031] like Figures 1 to 6As shown, an air-cooled battery box with an air duct system includes a shell 100, the shell 100 includes two air inlet panels 110 and an air outlet 120, the two air inlet panels 110 are arranged opposite to each other, and the air outlet 120 is provided with a cooling fan 121; two modules 200, the two modules 200 are both arranged in the shell 100, the two air inlet panels 110 are respectively located on both sides of the two modules 200, a main air duct 210 is arranged between the two modules 200, the main air duct 210 and the two air inlet panels 110 are all arranged along the length direction of the module 200, and the air outlet 120 is located at one end of the main air duct 210; the module 200 includes a plurality of battery cells 220 and two end plates 230, the plurality of battery cells 220 are sequentially arranged between the two end plates 230, a first air duct plate 240 is arranged between two adjacent battery cells 220, and a second air duct plate 250 is arranged between the end plate 230 and the adjacent battery cell 220. Cold air enters the shell 100 from the air inlet wall plates 110 on both sides of the two modules 200, passes through the first air duct plate 240 and the second air duct plate 250 to bring the heat between the several battery cells 220 to the main air duct 210, and finally passes through the air outlet 120 under the action of the cooling fan 121 to bring the heat out.

[0032] like Figure 1 As shown, the housing 100 includes two air inlet panels 110 arranged on the left and right and an air outlet 120 arranged at the front end of the two air inlet panels 110, and a cooling fan 121 is arranged on the air outlet 120. Two modules 200 are installed in the housing 100 and are located between the two air inlet panels 110. A main air duct 210 is arranged between the two modules 200. The main air duct 210 extends in the left-right direction, and the air outlet 120 is located at the front end of the main air duct 210. Specifically, as Figure 2 As shown, the module 200 includes two end plates 230 arranged front to back, and a plurality of battery cells 220 arranged in sequence between the two end plates 230 along the front to back direction, a first air duct plate 240 is arranged between two adjacent battery cells 220, and a second air duct plate 250 is arranged between the end plate 230 and the battery cell 220 adjacent thereto, wherein the battery cells 220, the first air duct plate 240, the second air duct plate 250 and the end plate 230 have the same shape, and the battery cells 220, the first air duct plate 240, the second air duct plate 250 and the end plate 230 are overlapped to form a rectangular columnar structure. Thus, cold air enters the shell 100 from the air inlet wall panels 110 on both sides of the two modules 200, and passes through the first air duct plate 240 and the second air duct plate 250 to bring the heat between the battery cells 220 to the main air duct 210, and finally passes through the air outlet 120 under the action of the cooling fan 121 to bring the heat out, so that the internal air flow of the battery box can circulate, so as to reduce the temperature inside the battery box, thereby improving the charging efficiency and power of the battery and extending its service life.

[0033] In some specific embodiments of the utility model, an air hole group 111 is provided on the air inlet wall plate 110, and the number of the air hole groups 111 on each air inlet wall plate 110 corresponds to the total number of the first air duct plates 240 and the second air duct plates 250 on each module 200. Several air hole groups 111 are evenly distributed along the length direction of the module 200, and each first air duct plate 240 and each second air duct plate 250 are arranged corresponding to one air hole group 111.

[0034] like Figure 1 and Figure 2 As shown, eight battery cells 220 are arranged in sequence along the front-to-back direction, wherein seven first air duct plates 240 are respectively interspersed between two adjacent battery cells 220, and two second air duct plates 250 are respectively located at the front and rear ends of the eight battery cells 220. Correspondingly, nine air hole groups 111 are provided on the single-sided air inlet wall plate 110, that is, each first air duct plate 240 and each second air duct plate 250 in each module 200 is correspondingly provided with an air hole group 111, so as to ensure that each cold air entering the shell 100 from the air hole group 111 can smoothly and fluently enter the main air duct 210 through the first air duct plate 240 or the second air duct plate 250.

[0035] In some specific embodiments of the present invention, the air hole group 111 includes two end holes 112 and a long hole 113 disposed between the two end holes 112, and the long hole 113 and the two end holes 112 are disposed along a length direction perpendicular to the air inlet wall plate 110. Figure 2 As shown, the air hole group 111 includes two end holes 112 arranged vertically and a long hole 113 arranged between the two end holes 112, and the long hole 113 extends in the vertical direction.

[0036] In some specific embodiments of the present invention, the areas of the end holes 112 gradually increase in a direction away from the air outlet 120, and the areas of the long holes 113 gradually increase in a direction away from the air outlet 120. Figure 2 As shown, the area of ​​the end hole 112 located on the same horizontal line extending in the front-to-back direction gradually increases from right to left; the area of ​​the long hole 113 located on the same horizontal line extending in the front-to-back direction gradually increases from right to left. Therefore, by adjusting the areas of the end hole 112 and the long hole 113, the pressure balance inside the shell 100 can be achieved, and the area of ​​the air inlet hole farther away from the air outlet 120 gradually increases, which can increase the air flow rate in this area and reduce the resistance, thereby balancing the pressure distribution in the battery box and ensuring the stability of the air flow.

[0037] In some specific embodiments of the utility model, the first air duct plate 240 includes: a first frame 241, the first frame 241 is arranged on the shell 100, the shape of the first frame 241 corresponds to the battery cell 220, and the first frame 241 is symmetrically provided with two first limiting grooves 241a, and the two first limiting grooves 241a are respectively used to accommodate two adjacent battery cells 220 to limit the position of the battery cell 220; a first overhead part 242, the first overhead part 242 is evenly distributed at the bottom of the first limiting groove 241a, the first overhead part 242 is against the battery cell 220, and the battery cell 220 and the bottom of the first limiting groove 241a are enclosed to form a first air duct, the first air duct is connected to the outside through the air inlet wall plate 110, the first air duct is connected to the main air duct 210, the cold air passes through the wind wall plate into the first air duct, and then brings the heat into the main air duct 210.

[0038] like Figure 3 As shown, the first frame 241 is rectangular, and the front and rear ends of the first frame 241 are both provided with first limiting grooves 241a, and the shape of the first limiting grooves 241a is consistent with that of the battery cell 220. When the battery cell 220 is placed in the first limiting grooves 241a of the first air duct plates 240 at the front and rear ends, the position of the battery cell 220 between the two first air duct plates 240 can be limited. Specifically, the bottom of the first limiting groove 241a is provided with a first overhead member 242, and the first overhead member 242 can be against the battery cell 220. At this time, a planar gap is formed between the bottom of the first limiting groove 241a and the battery cell 220, and the planar gap forms a first air duct. The first air duct is connected to the outside through the air hole group 111 on the air inlet wall plate 110, and is connected to the main air duct 210 internally.

[0039] Specifically, the first overhead component 242 is a strip-shaped component crisscrossed at the bottom of the first limiting groove 241a. Of course, other structures that can limit the position of the battery cell 220 in the first limiting groove 241a and form the first air duct can be regarded as the first overhead component 242.

[0040] In some specific embodiments of the utility model, the second air duct plate 250 includes: a second frame 251, the second frame 251 is arranged on the shell 100, the shape of the second frame 251 corresponds to the battery cell 220, and the second frame 251 is provided with a second limiting groove 251a, the second limiting groove 251a is used to accommodate the battery cell 220 adjacent to the end plate 230 to limit the position of the battery cell 220; a second overhead member 252, the second overhead member 252 is evenly arranged at the bottom of the second limiting groove 251a, the second overhead member 252 is against the battery cell 220, the battery cell 220 and the bottom of the second limiting groove 251a are enclosed to form a secondary air duct, the secondary air duct is connected to the outside through the air inlet wall plate 110, the secondary air duct is connected to the main air duct 210, the cold air passes through the air inlet wall plate 110 into the secondary air duct, and then brings the heat into the main air duct 210.

[0041] like Figure 4 and Figure 5 As shown, the second frame 251 is rectangular, and a second limiting groove 251a is provided at one end of the second frame 251 away from the end plate 230. The shape of the second limiting groove 251a is consistent with that of the battery cell 220. When the battery cell 220 is placed in the first limiting groove 241a of the first air duct plate 240 and the second limiting groove 251a of the second air duct plate 250, the position of the battery cell 220 between the first air duct plate 240 and the second air duct plate 250 can be limited. Specifically, a second overhead member 252 is provided at the bottom of the second limiting groove 251a, and the second overhead member 252 can be against the battery cell 220. At this time, a planar gap is formed between the bottom of the second limiting groove 251a and the battery cell 220, and the planar gap forms a secondary air duct. The secondary air duct is connected to the outside through the air hole group 111 on the air inlet wall plate 110, and is connected to the main air duct 210 internally.

[0042] Specifically, the first overhead member 242 is a strip-shaped member arranged at the bottom of the limiting groove in a crisscross pattern. Of course, other structures that can limit the position of the battery cell 220 in the limiting groove and form the primary air duct can be regarded as the first overhead member 242.

[0043] Thus, cold air enters the shell 100 from the air hole group 111 on the air inlet wall panels 110 on the left and right sides, passes through the first air duct and the second air duct between the two modules 200, and brings the heat between the battery cells 220 into the main air duct 210. Finally, the heat is brought out from the air outlet 120 under the action of the cooling fan 121, thereby reducing the temperature between the module 200 and the battery cells 220 through air flow, ensuring that the battery cells 220 can be in a better operating environment.

[0044] In some specific embodiments of the present invention, the housing 100 further includes: two cover plates 130, two air inlet panels 110 are arranged between the two cover plates 130; two side wall panels 140, two side wall panels 140 are arranged between the two cover plates 130, the two cover plates 130, the two side wall panels 140 and the two air inlet panels 110 are connected to each other and enclosed to form a cavity, the two modules 200 are located in the cavity, and the air outlet 120 is arranged on one of the side wall panels 140. Figure 1 As shown, the two cover plates 130 are respectively located on the upper and lower sides of the module 200, the two air inlet wall plates 110 are located on the left and right sides of the two modules 200, and the two side wall plates 140 are located on the front and back sides of the two modules 200, wherein the air outlet 120 is arranged on the front side side wall plate 140.

[0045] In some specific embodiments of the present invention, a fixing assembly 260 is further included, and the fixing assembly 260 is used to define the positions of the battery cell 220 , the first air duct plate 240 and the second air duct plate 250 .

[0046] In some specific embodiments of the present invention, the fixing assembly 260 includes: a plurality of fixing grooves 261, the plurality of fixing grooves 261 are arranged on the module 200, and the fixing grooves 261 extend along the length direction of the module 200; a fixing plate 262, the number of the fixing plates 262 corresponds to the number of the fixing grooves 261, one end of each fixing plate 262 is fixedly arranged on one of the end plates 230, and the other end passes through the fixing groove 261 and is fixedly arranged on the other end plate 230.

[0047] like Figure 6 As shown, the module 200 further includes a fixing assembly 260, and the module 200 is provided with four fixing grooves 261, which extend in the front-to-back direction and are respectively arranged in pairs on the left and right sides of the module 200. Correspondingly, four fixing plates 262 are also provided, and the four fixing plates 262 are respectively arranged in the four fixing grooves 261. Specifically, the front end of each fixing plate 262 is arranged on the edge of the front end plate 230 by bolts, and the rear end of the fixing plate 262 is arranged on the edge of the rear end plate 230 by bolts. Thus, the fixing plates 262 located on the left and right sides of the module 200 are connected with the two end plates 230 and are confined in the fixing grooves 261, thereby limiting the displacement of a plurality of battery cells 220, the first air duct plate 240 and the second air duct plate 250 in the up-down direction, so that the single battery cells 220, the first air duct plate 240 and the second air duct plate 250 can be sequentially overlapped and connected.

[0048] In some specific embodiments of the present invention, cold air enters the shell 100 from the air inlet wall plates 110 on both sides of the two modules 200, passes through the first air duct formed between the first air duct plate 240 and the battery cell 220 and the second air duct formed between the second air duct plate 250 and the battery cell 220, and brings the heat between the battery cells 220 to the main air duct 210. The airflow flows from back to front under the action of the cooling fan 121, and finally passes through the air outlet 120 to bring out the heat. The internal airflow of the battery box circulates smoothly, which reduces the temperature inside the battery box, thereby improving the charging efficiency and power of the battery and extending its service life.

[0049] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. An air-cooled battery box with an air duct system, characterized in that: include: A housing (100), the housing (100) comprising two air inlet panels (110) and an air outlet (120), the two air inlet panels (110) being arranged opposite to each other, and the air outlet (120) being provided with a heat dissipation fan (121); Two modules (200), both of which are arranged in the housing (100), the two air inlet panels (110) are respectively located on both sides of the two modules (200), a main air duct (210) is arranged between the two modules (200), the main air duct (210) and the two air inlet panels (110) are arranged along the length direction of the modules (200), and the air outlet (120) is located at one end of the main air duct (210); The module (200) comprises a plurality of battery cells (220) and two end plates (230); the plurality of battery cells (220) are arranged in sequence between the two end plates (230); a first air duct plate (240) is arranged between two adjacent battery cells (220); a second air duct plate (250) is arranged between the end plate (230) and the adjacent battery cells (220); cold air enters the housing (100) from the air inlet wall plates (110) on both sides of the two modules (200), passes through the first air duct plate (240) and the second air duct plate (250), brings the heat between the plurality of battery cells (220) to the main air duct (210), and finally passes through the air outlet (120) under the action of the heat dissipation fan (121) to bring the heat out.

2. The air-cooled battery box with an air duct system according to claim 1, characterized in that: An air hole group (111) is provided on the air inlet wall plate (110), and the number of the air hole groups (111) on each of the air inlet wall plates (110) corresponds to the total number of the first air duct plates (240) and the second air duct plates (250) on each of the modules (200). A plurality of the air hole groups (111) are evenly distributed along the length direction of the module (200), and each of the first air duct plates (240) and each of the second air duct plates (250) are provided corresponding to one of the air hole groups (111).

3. The air-cooled battery box with an air duct system according to claim 2, characterized in that: The air hole group (111) comprises two end holes (112) and a long hole (113) arranged between the two end holes (112); the long hole (113) and the two end holes (112) are arranged along a length direction perpendicular to the air inlet wall plate (110).

4. The air-cooled battery box with an air duct system according to claim 3, characterized in that: The areas of the plurality of end holes (112) gradually increase in a direction away from the air outlet (120), and the areas of the plurality of long holes (113) gradually increase in a direction away from the air outlet (120).

5. The air-cooled battery box with an air duct system according to claim 1, characterized in that: The first air duct plate (240) comprises: a first frame (241), the first frame (241) being arranged on the housing (100), the shape of the first frame (241) corresponding to the battery cell (220), the first frame (241) being symmetrically provided with two first limiting grooves (241a), the two first limiting grooves (241a) being respectively used to accommodate two adjacent battery cells (220) so as to limit the positions of the battery cells (220); A first overhead part (242), wherein the first overhead part (242) is evenly arranged at the bottom of the first limiting groove (241a), the first overhead part (242) abuts against the battery cell (220), the battery cell (220) and the bottom of the first limiting groove (241a) enclose a first air duct, the first air duct is connected to the outside through the air inlet wall plate (110), the first air duct is connected to the main air duct (210), cold air passes through the air inlet wall plate (110) and enters the first air duct, and then brings heat into the main air duct (210).

6. The air-cooled battery box with an air duct system according to claim 1, characterized in that: The second air duct plate (250) comprises: a second frame (251), the second frame (251) being arranged on the housing (100), the shape of the second frame (251) corresponding to the battery cell (220), the second frame (251) being provided with a second limiting groove (251a), the second limiting groove (251a) being used to accommodate the battery cell (220) adjacent to the end plate (230) so as to limit the position of the battery cell (220); A second overhead member (252), the second overhead member (252) is evenly arranged at the bottom of the second limiting groove (251a), the second overhead member (252) abuts against the battery cell (220), the battery cell (220) and the bottom of the second limiting groove (251a) form a secondary air duct, the secondary air duct is connected to the outside through the air inlet wall plate (110), the secondary air duct is connected to the main air duct (210), cold air passes through the air inlet wall plate (110) into the secondary air duct, and then brings heat into the main air duct (210).

7. The air-cooled battery box with an air duct system according to claim 1, characterized in that: The housing (100) further comprises: Two cover plates (130), the two air inlet wall plates (110) being arranged between the two cover plates (130); Two side wall plates (140), the two side wall plates (140) are arranged between the two cover plates (130), the two cover plates (130), the two side wall plates (140) and the two air inlet wall plates (110) are interconnected and enclosed to form a cavity, the two modules (200) are located in the cavity, and the air outlet (120) is arranged on one of the side wall plates (140).

8. The air-cooled battery box with an air duct system according to claim 1, characterized in that: It also includes a fixing component (260), wherein the fixing component (260) is used to define the positions of the battery cell (220), the first air duct plate (240), and the second air duct plate (250).

9. The air-cooled battery box with an air duct system according to claim 8, characterized in that: The fixing assembly (260) comprises: a plurality of fixing grooves (261), wherein the plurality of fixing grooves (261) are arranged on the module (200), and the fixing grooves (261) extend along the length direction of the module (200); A fixing plate (262), the number of the fixing plates (262) corresponds to the number of the fixing slots (261), and one end of each fixing plate (262) is fixedly disposed on one of the end plates (230). The other end passes through the fixing groove (261) and is fixedly arranged on the other end plate (230).

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