Battery pack

Abstract

The utility model discloses a battery pack, and relates to the field of energy storage equipment. The battery pack comprises a battery box and a battery module arranged in the battery box. The battery module comprises a plurality of battery monomers, the battery monomers are arranged in at least two columns in the battery box, the plurality of battery monomers belonging to the same column are arranged at intervals in the first direction, the at least two columns of battery monomers are arranged at intervals in the second direction, and a main air duct extending in the first direction is formed between every two adjacent columns of battery monomers. At least one side of the battery box in the first direction is provided with an air outlet, the air outlet is communicated with the main air duct, the air outlet is provided with an exhaust fan, and two opposite sides of the battery box in the second direction are respectively provided with an air inlet. The battery pack provided by the utility model has a relatively good heat dissipation effect, so that the risk of overheating of the single batteries can be reduced, and the safety of the battery pack is improved.

Description

Technical Field

[0001] This application relates to the field of energy storage equipment technology, and more specifically, to a battery pack. Background Technology

[0002] In existing technologies, battery packs, as energy storage devices, are commonly used in new energy vehicles and commercial settings to power electrical equipment. A battery pack consists of a battery box and multiple individual battery cells housed within it. During charging and discharging, the battery pack generates heat, and excessively high temperatures can affect its operational reliability and even pose safety risks. Related technologies employ appropriate heat dissipation structures to cool the battery pack, such as using fans for air cooling. However, existing air cooling methods suffer from poor heat dissipation uniformity; localized areas of the battery pack or certain surfaces of individual battery cells remain at high temperatures. In particular, the surfaces between battery cells are difficult to cool with airflow, resulting in poor heat dissipation performance for existing battery packs. Utility Model Content

[0003] The purpose of this application is to provide a battery pack that has better heat dissipation performance and better safety.

[0004] The embodiments of this application can be implemented as follows:

[0005] This application provides a battery pack, including a battery box and a battery module disposed within the battery box. The battery pack has a first direction and a second direction forming an angle. The battery module includes multiple battery cells, which are arranged in at least two columns within the battery box. Multiple battery cells belonging to the same column are spaced apart in the first direction, and at least two columns of battery cells are spaced apart in the second direction. A main air duct extending along the first direction is formed between two adjacent columns of battery cells. An exhaust port is provided on at least one side of the battery box in the first direction, and the exhaust port is connected to the main air duct. An exhaust fan is provided at the exhaust port. Air inlets are provided on opposite sides of the battery box in the second direction.

[0006] In an optional embodiment, the battery pack further includes an air guide shroud having a first opening and a second opening opposite each other in a first direction, the first opening communicating with an exhaust vent and the second opening communicating with a main air duct.

[0007] In an optional embodiment, a fan cover is provided inside the battery box. One end of the fan cover is connected to the exhaust port, and the other end is connected to the first opening of the air guide cover. The exhaust fan is located inside the cavity of the fan cover.

[0008] In an optional embodiment, the battery cell is a prismatic battery, and the battery cell has two first side surfaces spaced apart in a first direction and two second side surfaces spaced apart in a second direction, wherein the area of ​​the first side surface is larger than the area of ​​the second side surface.

[0009] In an optional embodiment, a separator assembly is provided between two adjacent battery cells in the same column. The separator assembly includes a separator body and buffer members disposed on both sides of the separator body. The buffer members on both sides of the separator body are used to abut against two adjacent battery cells, and a gap is formed between the separator body and the battery cells.

[0010] In an optional embodiment, the battery box also includes a dust filter that covers the air inlet.

[0011] In an optional embodiment, the battery module further includes a heating film, which is attached to the side of the battery cell facing a third direction, the third direction being perpendicular to the first and second directions.

[0012] In an optional embodiment, the battery box includes a heat sink with opposing inner and outer sides. The inner side of the heat sink is attached to a heating film, and the outer side of the heat sink is exposed on the outer surface of the battery box. The outer side of the heat sink is provided with a plurality of fins.

[0013] In an optional implementation, the operating noise of the exhaust fan is less than 35 decibels.

[0014] In an optional embodiment, the battery box includes a box body and a box cover. The box body includes a back plate, a first end plate, a second end plate, and two side plates. The first end plate and the second end plate are spaced apart in a first direction, and the two side plates are spaced apart in a second direction. An exhaust port is provided on the first end plate, and an air inlet is provided on each of the two side plates. The box cover is spaced apart from the back plate in a third direction and is detachably connected to the end of the first end plate, the second end plate, and the side plates away from the back plate. The third direction is perpendicular to the first and second directions.

[0015] In an optional embodiment, the battery module is mounted on a back panel, and the side of the main air duct near the back panel is blocked by the back panel. The battery box also includes a wind deflector that blocks the side of the main air duct near the box cover.

[0016] In an optional embodiment, the battery box further includes a support foot disposed on the second end plate.

[0017] The beneficial effects of the battery pack provided in this application embodiment include:

[0018] The battery pack provided in this application includes a battery box and battery modules disposed within the battery box. Each battery module includes multiple battery cells arranged in at least two rows within the battery box. Multiple battery cells belonging to the same row are spaced apart in a first direction, and at least two rows of battery cells are spaced apart in a second direction. A main air duct extending along the first direction is formed between adjacent rows of battery cells. An exhaust vent is provided on at least one side of the battery box in the first direction, communicating with the main air duct. An exhaust fan is provided at the exhaust vent. Air inlets are provided on opposite sides of the battery box in the second direction. Since the battery cells in each row are spaced apart along the first direction, when the exhaust fan is turned on, cold air from outside the battery box enters the battery box through the air inlets and passes through the gaps between the battery cells in the second direction, cooling the surfaces between the battery cells. After passing through the gaps between the battery cells, the gas can flow into the main air duct and move along the first direction to the exhaust vent. During its movement along the main air duct, the gas can also cool the surfaces between the two rows of battery cells. The heated gas eventually reaches the exhaust port and is discharged from the battery pack under the drive of the exhaust fan, thus achieving heat dissipation of the battery pack. It is evident that the battery pack provided in this application embodiment can effectively dissipate heat between the surfaces of battery cells in the same row, as well as between the surfaces of battery cells in adjacent rows, exhibiting superior heat dissipation performance. This reduces the risk of battery cell overheating and improves the safety of the battery pack. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a battery pack from a first-view perspective in one embodiment of this application;

[0021] Figure 2 This is a schematic diagram of the battery pack from a second perspective in one embodiment of this application;

[0022] Figure 3 This is a schematic diagram of a battery module disposed inside a battery box in one embodiment of this application;

[0023] Figure 4 This is a first schematic diagram of a battery module in one embodiment of this application;

[0024] Figure 5 This is a schematic diagram of a single battery cell according to one embodiment of this application;

[0025] Figure 6 This is a schematic diagram of a partition assembly in one embodiment of this application;

[0026] Figure 7 This is a second schematic diagram of a battery module in one embodiment of this application;

[0027] Figure 8 This is a schematic diagram showing the arrangement of the battery module and the air guide shroud inside the housing in one embodiment of this application;

[0028] Figure 9 This is a first schematic diagram of the air guide shroud in one embodiment of this application;

[0029] Figure 10 This is a second schematic diagram of the air guide shroud in one embodiment of this application.

[0030] Icons: 100-Battery box; 101-Box body; 102-Box cover; 110-Back panel; 111-Heat sink; 120-First end plate; 121-Exhaust vent; 122-Exhaust fan; 123-Fan cover; 130-Second end plate; 131-Support feet; 140-Side panel; 141-Air inlet; 142-Dust filter; 143-Handle slot; 150-Air guide cover; 151-First opening; 152-Second opening; 160-Windbreak; 200-Battery module; 201-Main air duct; 210-Battery cell; 211-First side; 212-Second side; 213-Terminal post; 220-Busbar; 230-Connector; 240-Signal acquisition component; 250-Separator assembly; 251-Separator body; 252-Buffer; 260-Heating film; 270-Enclosure; X-First direction; Y-Second direction; Z-Third direction. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0034] In the description of this application, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0035] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0036] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0037] In related technologies, battery packs consist of individual battery cells arranged in an orderly fashion within the battery compartment. Taking square battery cells as an example, cells in the same row often have large adjacent surfaces. Because airflow is difficult to reach the large surfaces between two cells, heat easily accumulates in these areas, leading to localized overheating of the battery pack. Furthermore, battery packs used in industrial and commercial applications generate significant fan noise. With the increasing prevalence of battery packs in home settings, existing battery packs are insufficient to meet the quiet environment requirements of households.

[0038] Therefore, this application provides a battery pack that optimizes the airflow path within the battery pack by rationally configuring the arrangement of individual battery cells and the placement of the air inlet and outlet, thereby improving the heat dissipation effect of the battery pack.

[0039] Figure 1 This is a schematic diagram of a battery pack from a first-view perspective in one embodiment of this application; Figure 2 This is a schematic diagram of the battery pack in one embodiment of this application from a second perspective. Figure 1 and Figure 2As shown, the battery pack provided in this embodiment includes a battery case 100 and a battery module 200 disposed in the battery case 100. The battery case 100 includes a case body 101 and a cover 102. The case body 101 forms a receiving cavity for accommodating the battery module 200, and the receiving cavity has an opening. The cover 102 is detachably connected to the case body 101 and is used to open or close the opening of the receiving cavity. The battery case 100 is provided with an exhaust vent 121 and an air inlet 141, and an exhaust fan 122 is provided at the exhaust vent 121. When the exhaust fan 122 is running, it can generate negative pressure inside the battery case 100. Gas from outside the battery case 100 enters the battery case 100 through the air inlet 141, exchanges heat with the battery module 200, and is then discharged from the exhaust vent 121.

[0040] In this embodiment, the battery box 100 is generally a cuboid structure. The battery pack has a first direction X, a second direction Y, and a third direction Z forming an angle; specifically, the first direction X, the second direction Y, and the third direction Z are mutually perpendicular. The battery box 100 has an exhaust vent 121 on at least one side in the first direction X. In this embodiment, the battery box 100 has an exhaust vent 121 on only one side in the first direction X, meaning that an exhaust fan 122 is only provided at one end of the battery box 100. The battery box 100 has air inlets 141 on opposite sides in the second direction Y, allowing external air to enter the battery box 100 from both sides.

[0041] In practical use, the first direction X is perpendicular to the ground, the second direction Y and the third direction Z are horizontal, the exhaust vent 121 faces upward, and the two air inlets 141 face opposite horizontal directions. Optionally, the battery box 100's body 101 includes a back plate 110, a first end plate 120, a second end plate 130, and two side plates 140. The openings of the back plate 110 and the body 101 are spaced apart in the third direction Z, the first end plate 120 and the second end plate 130 are spaced apart in the first direction X, and the two side plates 140 are spaced apart in the second direction Y. The exhaust vent 121 and the exhaust fan 122 are disposed on the first end plate 120, and the two side plates 140 are respectively provided with air inlets 141. In this embodiment, the air inlets 141 are composed of multiple through holes arranged in an array on the side plates 140, making the area on the side plates 140 where the air inlets 141 are disposed a mesh structure. Because the individual through-holes are small in size, it helps prevent foreign objects from entering the battery box 100 through the air inlet 141. In this embodiment, gripper grooves 143 are provided on the two side plates 140 respectively. The gripper grooves 143 make it convenient for users to grab the battery pack by hand, thereby facilitating the handling of the battery pack.

[0042] Optionally, the battery box 100 also includes a support foot 131, which is disposed on the second end plate 130 and protrudes from the outer surface of the second end plate 130 to support the battery pack on the ground and bear the weight of the entire battery pack. Optionally, the support foot 131 includes casters to facilitate user movement of the battery pack.

[0043] In this embodiment, there are two exhaust fans 122, which are arranged side by side in the second direction Y. Optionally, the operating noise of the exhaust fans 122 is less than 35 decibels. It should be noted that the operating noise of the exhaust fans 122 in this application refers to the total operating noise of all the exhaust fans 122 in a battery pack.

[0044] In this embodiment, a window is provided on the back plate 110, and the battery box 100 also includes a heat sink 111. The heat sink 111 is fixed to the inner side of the side plate 140 and covers the window. The heat sink 111 has opposing inner and outer sides. The outer side of the heat sink 111 is exposed to the outer surface of the battery box 100 through the window, and the inner side of the heat sink 111 can directly or indirectly abut against the battery module 200, so that the heat generated by the battery module 200 can be transferred to the heat sink 111 through thermal conduction. Optionally, the outer side of the heat sink 111 is provided with several fins to increase the heat transfer area and improve the heat dissipation effect. The material of the heat sink 111 is a material with a high thermal conductivity, such as aluminum or copper.

[0045] Figure 3 This is a schematic diagram of a battery module 200 disposed in a battery box 100 in one embodiment of this application; Figure 4 This is a first schematic diagram of a battery module 200 in one embodiment of this application. Figure 3 and Figure 4As shown, the battery module 200 includes multiple battery cells 210, which are arranged in at least two columns within the battery box 100. Multiple battery cells 210 belonging to the same column are spaced apart in a first direction X, and at least two columns of battery cells 210 are spaced apart in a second direction Y. A main air duct 201 extending along the first direction X is formed between adjacent columns of battery cells 210. In this embodiment, the battery module 200 includes two columns of battery cells 210 and forms one main air duct 201; in other embodiments, the battery module 200 may include multiple columns of battery cells 210 and form two or more main air ducts 201. In this embodiment, the battery module 200 is fixedly mounted to the back plate 110, therefore the side of the main air duct 201 near the back plate 110 is blocked by the back plate 110. The battery box 100 also includes a wind deflector 160, which blocks the side of the main air duct 201 near the box cover 102. In this embodiment, the wind deflector 160 is a strip-shaped plate extending along the first direction X. Under the blocking effect of the wind deflector 160, the gas flowing into the main air duct 201 is prevented from being discharged from the main air duct 201 along the third direction Z, so that the airflow can be transported to the exhaust port 121 along the first direction X.

[0046] In this embodiment, battery cells 210 in the same column are connected in series via busbar 220, and the ends of two columns of battery cells 210 in the first direction X (in this embodiment, the end furthest from the exhaust vent 121) are electrically connected via connector 230. Each column of battery cells 210 is clamped together by a retaining member 270 to ensure that a column of battery cells 210 does not scatter. In this embodiment, the battery module 200 also includes a signal acquisition component 240, which is located on the side of the battery module 200 where the busbar 220 is located. The signal acquisition component 240 is used to acquire relevant information of the battery module 200, such as voltage, current, and temperature. Furthermore, both the signal acquisition component 240 and the busbar 220 are located on the side of the battery module 200 near the cover 102. An insulating sheet (not shown in the figure) can be provided between the signal acquisition component 240 and the cover 102 of the battery box 100 to prevent the current of the battery module 200 from being transmitted to the battery box 100.

[0047] In this embodiment, the battery box 100 also includes a dustproof net 142, which covers the air inlet 141. When air enters through the air inlet 141, the dustproof net 142 can effectively block dust in the air, preventing dust from affecting the battery module 200 and ensuring the cleanliness inside the battery box 100. Specifically, the dustproof net 142 is attached to the inside of the side panel 140.

[0048] Figure 5 This is a schematic diagram of a battery cell 210 according to one embodiment of this application. Figure 5As shown, in this embodiment, the battery cell 210 is a prismatic battery. The battery cell 210 has two first side surfaces 211 spaced apart in a first direction X and two second side surfaces 212 spaced apart in a second direction Y. The area of ​​the first side surface 211 is larger than the area of ​​the second side surface 212. In other words, the first side surface 211 of the battery cell 210 is the larger side surface, and the second side surface 212 is the smaller side surface. The larger side surfaces of two adjacent battery cells 210 in the same column face each other, and the smaller side surfaces of two adjacent columns of battery cells 210 face each other in the second direction Y. The battery cell 210 has opposing top and bottom surfaces in a third direction Z. The top of the battery cell 210 is close to the cover 102, and the bottom is close to the back plate 110. A terminal post 213 is provided on the top of the battery cell 210, which is used to connect to the busbar 220.

[0049] In this embodiment, when the airflow enters the battery box 100 from the air inlet 141, it can pass through the gap between two adjacent battery cells 210 in the same column along the second direction Y, thereby entering the main air duct 201. The main air duct 201 is connected to the exhaust port, so air can be transported to the exhaust port through the main air duct 201 and further discharged from the battery box 100 through the exhaust port.

[0050] In this embodiment, a separator assembly 250 is provided between two adjacent battery cells 210 in the same column. By providing the separator assembly 250, a gap can be maintained between the battery cells 210. Figure 6 This is a schematic diagram of a partition assembly 250 in one embodiment of this application. Figure 6 As shown, the separator assembly 250 includes a separator body 251 and buffer members 252 disposed on both sides of the separator body 251. The buffer members 252 on both sides of the separator body 251 are respectively used to abut against two adjacent battery cells 210, forming a gap between the separator body 251 and the battery cells 210. In this embodiment, the first side 211 of the battery cell 210 abuts against the buffer member 252 on the separator assembly 250. Since the buffer member 252 protrudes from the surface of the separator body 251, when the buffer member 252 abuts against the first side 211 of the battery cell 210, a gap is formed between the first side 211 of the battery cell 210 and the surface of the separator body 251, allowing gas to flow. The buffer member 252 not only enables the formation of a gap between the battery cell 210 and the separator body 251, but also avoids rigid contact between the separator body 251 and the battery cell 210, preventing damage to the surface of the battery cell 210. In addition, by setting the separator assembly 250 to create gaps between the battery cells 210, a certain amount of expansion space can be reserved when the battery cells 210 expand, thus preventing excessive internal pressure in the battery cells 210. Optionally, the buffer member 252 can be made of sponge, silicone, or rubber.

[0051] In this embodiment, three buffer members 252 are respectively provided on two sides of the partition body 251. The buffer members 252 are strip-shaped and extend along the second direction Y. The three buffer members 252 are spaced apart in the third direction Z, and a channel for gas flow is formed between two adjacent buffer members 252, which extends along the second direction Y. In other embodiments, the shape and position of the buffer members 252 can be adjusted as needed. For example, four buffer members 252 can be provided on each side of the partition body 251, and the four buffer members 252 can be located at the four corners of the partition body 251.

[0052] Figure 7 This is a second schematic diagram of a battery module 200 in one embodiment of this application. For example... Figure 7 As shown, the battery module 200 also includes a heating film 260, which is attached to the side of the battery cell 210 in the Z-direction. Specifically, in this embodiment, the heating film 260 is attached to the bottom of the battery cell 210, that is, the end near the back plate 110 of the battery box 100. The side of the heating film 260 away from the battery cell 210 is adjacent to the heat sink 111 (see...). Figure 2 The inner side of the battery cell 210 is adhered to the battery. It should be understood that the performance of the battery cell 210 is negatively affected at low temperatures. By providing a heating film 260, the heating film 260 can generate heat after being energized, thus heating the battery cell 210 and ensuring battery performance. In this embodiment, the battery module 200 includes two heating films 260, which are respectively attached to the bottom of the two rows of battery cells 210.

[0053] Optionally, the heating film 260 includes a thermally conductive pad and a heating wire embedded in the thermally conductive pad. The heating wire generates heat when energized. Due to its flexibility, the thermally conductive pad can fit well with the bottom of the battery cell 210, eliminating air gaps and ensuring high heat transfer efficiency. Furthermore, the heating film 260 can also fit well with the heat sink 111. When heat dissipation is required for the battery module 200, the heating film 260 can transfer the heat from the battery cell 210 to the heat sink 111 through thermal conduction. The heat sink 111 then transfers the heat to the environment outside the battery box 100, thereby achieving heat dissipation. Optionally, the thermal conductivity of the heating film 260 is 2.0 W / (m·K) or higher, thus ensuring good heat transfer performance.

[0054] Figure 8 This is a schematic diagram showing the arrangement of the battery module 200 and the air guide shroud 150 within the housing 101 in one embodiment of this application. The diagram is designed to clearly illustrate the positional relationship between the main air duct 201 and the air guide shroud 150. Figure 8 Some components of the battery pack are hidden inside; Figure 8 The hollow arrow indicates the direction of airflow. For example... Figure 8As shown, the battery pack also includes an air guide shroud 150. The airflow in the main air duct 201 needs to pass through the air guide shroud 150 to be delivered to the exhaust port 121. The air guide shroud 150 guides the airflow delivered from the main air duct 201. In this embodiment, a fan shroud 123 is also provided inside the battery box 100 (specifically, inside the first end plate 120). One end of the fan shroud 123 is connected to the exhaust port 121, and the other end is connected to the air guide shroud 150. The exhaust fan 122 is disposed in the cavity of the fan shroud 123. The gas delivered from the main air duct 201 to the exhaust port 121 passes through the air guide shroud 150 and the fan shroud 123 in sequence, and is finally delivered out from the exhaust port 121. The fan shroud 123 provides installation space for the exhaust fan 122 and supports and protects the exhaust fan 122. By placing the fan cover 123 inside the battery box 100, the exhaust fan 122 can be prevented from protruding from the outer surface of the battery box 100, making the battery pack structure more compact and aesthetically pleasing.

[0055] Figure 9 This is a first schematic diagram of the air guide shroud 150 in one embodiment of this application; Figure 10 This is a second schematic diagram of the air guide shroud 150 in one embodiment of this application. For example... Figure 9 and Figure 10 As shown, the air guide shroud 150 has a first opening 151 and a second opening 152 opposite to each other in a first direction X. The first opening 151 communicates with the exhaust port 121, and the second opening 152 communicates with the main air duct 201. Specifically, the first opening 151 of the air guide shroud 150 communicates with the exhaust port 121 through the fan housing 123. Because the exhaust port 121 and the main air duct 201 have different sizes and shapes, by setting the air guide shroud 150, the gas flowing out of the main air duct 201 can be smoothly guided and collected to the exhaust port 121, thereby being discharged from the battery box 100. Optionally, the first opening 151 of the air guide shroud 150 can be provided with a sealing element to ensure a sealed connection with the opening of the main air duct 201, and the second opening 152 of the air guide shroud 150 can be provided with a sealing element to ensure a sealed connection with the fan housing 123.

[0056] In summary, this application provides a battery pack, which includes a battery box 100 and a battery module 200 disposed within the battery box 100. The battery module 200 includes multiple battery cells 210, which are arranged in at least two rows within the battery box 100. Multiple battery cells 210 belonging to the same row are spaced apart in a first direction X, and at least two rows of battery cells 210 are spaced apart in a second direction Y. A main air duct 201 extending along the first direction X is formed between adjacent rows of battery cells 210. The battery box 100 has an exhaust port 121 on at least one side in the first direction X, which communicates with the main air duct 201. An exhaust fan 122 is provided at the exhaust port 121. Air inlets 141 are respectively provided on opposite sides of the battery box 100 in the second direction Y. Since the individual battery cells 210 in each row of battery cells 210 are spaced apart along the first direction X, after the exhaust fan 122 is turned on, cold air from outside the battery box 100 enters the battery box 100 through the air inlet 141 and passes through the gaps between the battery cells 210 along the second direction Y. During this process, the air cools the surfaces between the battery cells 210. After passing through the gaps between the battery cells 210, the gas can flow into the main air duct 201 and move along the first direction X to the exhaust port. During its movement along the main air duct 201, the gas can also cool the surfaces between the two rows of battery cells 210. The heated gas finally reaches the exhaust port and is discharged from the battery box 100 under the drive of the exhaust fan 122, thus achieving heat dissipation of the battery pack. It can be seen that the battery pack provided in this embodiment can effectively dissipate heat between the surfaces between the battery cells 210 in the same row, and can also dissipate heat between the surfaces between adjacent rows of battery cells 210, with better heat dissipation effect, thereby reducing the risk of overheating of the battery cells 210 and improving the safety of the battery pack.

[0057] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A battery pack, characterized in that, The battery pack includes a battery box (100) and a battery module (200) disposed within the battery box (100). The battery pack has a first direction (X) and a second direction (Y) at an angle. The battery module (200) includes a plurality of battery cells (210). The battery cells (210) are arranged in at least two columns within the battery box (100). A plurality of battery cells (210) belonging to the same column are spaced apart in the first direction (X). The at least two columns of battery cells (210) are arranged in the second direction (Y). The battery cells (210) are arranged at intervals in the first direction (Y), and a main air duct (201) extending along the first direction (X) is formed between two adjacent columns of battery cells (210). The battery box (100) has an exhaust port (121) on at least one side in the first direction (X), the exhaust port (121) is connected to the main air duct (201), the exhaust port (121) is equipped with an exhaust fan (122), and the battery box (100) has air inlets (141) on opposite sides in the second direction (Y).

2. The battery pack according to claim 1, characterized in that, The battery pack also includes a duct (150) having a first opening (151) and a second opening (152) opposite each other in the first direction (X), the first opening (151) communicating with the exhaust port (121) and the second opening (152) communicating with the main air duct (201).

3. The battery pack according to claim 2, characterized in that, A fan cover (123) is provided inside the battery box (100). One end of the fan cover (123) is connected to the exhaust port (121), and the other end is connected to the first opening (151) of the air guide cover (150). The exhaust fan (122) is located inside the cavity of the fan cover (123).

4. The battery pack according to claim 1, characterized in that, The battery cell (210) is a prismatic battery. The battery cell (210) has two first side surfaces (211) spaced apart in the first direction (X) and two second side surfaces (212) spaced apart in the second direction (Y). The area of ​​the first side surface (211) is larger than the area of ​​the second side surface (212).

5. The battery pack according to claim 1, characterized in that, A separator assembly (250) is provided between two adjacent battery cells (210) in the same column. The separator assembly (250) includes a separator body (251) and buffer members (252) disposed on both sides of the separator body (251). The buffer members (252) on both sides of the separator body (251) are respectively used to abut against two adjacent battery cells (210), and a gap is formed between the separator body (251) and the battery cells (210).

6. The battery pack according to claim 1, characterized in that, The battery box (100) also includes a dustproof net (142) that covers the air inlet (141).

7. The battery pack according to claim 1, characterized in that, The battery module (200) further includes a heating film (260), which is attached to one side of the battery cell (210) in a third direction (Z), which is perpendicular to the first direction (X) and the second direction (Y).

8. The battery pack according to claim 7, characterized in that, The battery box (100) includes a heat sink (111), which has an inner side and an outer side. The inner side of the heat sink (111) is attached to the heating film (260), and the outer side of the heat sink (111) is exposed on the outer surface of the battery box (100). The outer side of the heat sink (111) is provided with a plurality of fins.

9. The battery pack according to any one of claims 1-8, characterized in that, The operating noise of the exhaust fan (122) is less than 35 decibels.

10. The battery pack according to any one of claims 1-8, characterized in that, The battery box (100) includes a box body (101) and a box cover (102). The box body (101) includes a back plate (110), a first end plate (120), a second end plate (130), and two side plates (140). The first end plate (120) and the second end plate (130) are spaced apart in the first direction (X), and the two side plates (140) are spaced apart in the second direction (Y). The vent (121) is located at the first end plate. The plate (120) and the two side plates (140) are respectively provided with air inlets (141); the cover (102) is spaced apart from the back plate (110) in the third direction (Z), and the cover (102) is detachably connected to the end of the first end plate (120), the second end plate (130) and the side plate (140) away from the back plate (110), and the third direction (Z) is perpendicular to the first direction (X) and the second direction (Y).

11. The battery pack according to claim 10, characterized in that, The battery module (200) is mounted on the back plate (110). The side of the main air duct (201) near the back plate (110) is blocked by the back plate (110). The battery box (100) also includes a wind deflector (160), which blocks the side of the main air duct (201) near the box cover (102).

12. The battery pack according to claim 10, characterized in that, The battery box (100) also includes a support foot (131), which is disposed on the second end plate (130).

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