Battery box and battery pack

Abstract

The battery box comprises a box body, the box body is provided with an air inlet, an air outlet, an air duct and a containing space, the containing space is used for installing a battery module, the air duct is located at the bottom of the containing space, the air duct communicates with the air inlet and the air outlet, and the box body comprises a first side plate; the first side plate is located between the containing space and the air channel, a plurality of air guide plates are arranged on the side face, located on the air channel, of the first side plate, and an air guide channel is formed between any adjacent air guide plates. By arranging the multiple air deflectors in the air duct, the air volume is uniform, the heat dissipation effect is improved, and the technical effects of being easy to machine are achieved.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and in particular relates to a battery box and a battery pack. Background Art

[0002] As battery range increases and battery charge levels rise, excessive heat accumulates within the battery pack during operation, affecting the lifespan. A cooling system must be designed into the battery pack to reduce the cell temperature. Cooling methods primarily include liquid cooling, direct cooling, immersion cooling, and air cooling. Liquid cooling, direct cooling, and immersion cooling are the most expensive. However, air cooling requires integral air ducts within the battery box, which concentrate airflow and reduce heat dissipation. Increasing the number of air ducts increases processing complexity and costs. Utility Model Content

[0003] The embodiments of the present application provide a battery box and a battery pack, and multiple air guide plates are arranged in the air duct to uniform the air volume, improve the heat dissipation effect, and achieve the technical effect of easy processing.

[0004] In a first aspect, an embodiment of the present application provides a battery box, comprising:

[0005] The box body is provided with an air inlet, an air outlet, an air duct and a receiving space. The receiving space is used to install the battery module. The air duct is located at the bottom of the receiving space and connects the air inlet and the air outlet.

[0006] The box body includes a first side plate, which is located between the receiving space and the air duct. The first side plate is located on a side of the air duct and is provided with multiple air guide plates, and an air guide channel is formed between any adjacent air guide plates.

[0007] Optionally, the first side panel is further provided with a plurality of heat dissipation fins on one side of the air duct. The heat dissipation fins are closer to the air outlet than the air guide plate. A heat dissipation channel is formed between adjacent heat dissipation fins, and the heat dissipation channel is connected to the air guide channel.

[0008] Optionally, the heat dissipation fins extend along the length direction of the box body, and a plurality of the heat dissipation fins are arranged in parallel and at intervals along the width direction of the box body.

[0009] Optionally, the air guide plate is arranged at an angle, and along the width direction of the box body, one end of the air guide plate is close to one side of the box body, and the other end is close to the other side opposite to the box body.

[0010] Optionally, the box body further includes a second side panel enclosing the air duct, the second side panel is vertically connected to the first side panel, and the second side panel is arranged parallel to and spaced apart from the air guide plate.

[0011] Optionally, the air inlet and the air outlet are respectively arranged on two opposite side walls of the box body.

[0012] Optionally, an air inlet channel and an air outlet channel are provided in the box body, the air inlet channel is connected to the air inlet and the air duct, the air inlet channel is used to install a fan assembly, and the air outlet channel is connected to the air outlet and the air duct.

[0013] Optionally, along the height direction of the box body, the air inlet channel and the air outlet channel are located above the air duct.

[0014] Optionally, the box body includes a third side panel surrounding the air outlet channel, the third side panel is located between the air outlet channel and the receiving space, and the third side panel is smoothly transitioned to the side of the first side panel facing away from the air inlet.

[0015] Optionally, a partition is provided in the air outlet channel, and the partition divides the air outlet sub-channels into a plurality of independent air outlet sub-channels, and the air outlet sub-channels are respectively connected to the air duct.

[0016] Optionally, the box body further includes a bottom plate that encloses the air duct, and the bottom plate is spaced apart from the first side plate.

[0017] Optionally, an air guide portion is provided on the bottom plate, the air guide portion is located on the air inlet side of the air duct, and the air guide portion is arranged opposite to the air outlet side of the air inlet channel.

[0018] Optionally, the side surface of the air guide portion opposite to the air inlet channel is inclined.

[0019] Optionally, a side surface of the air guide portion opposite to the air inlet channel is a curved surface.

[0020] In a second aspect, an embodiment of the present application further provides a battery pack, comprising:

[0021] The battery box described above;

[0022] A battery module is installed in the receiving space, and the battery module is located above the air duct;

[0023] The fan assembly is installed in the box body, and the fan assembly is arranged opposite to the air inlet.

[0024] The battery box and battery pack provided in the embodiments of the present application include a box body, the box body is provided with an air inlet, an air outlet, an air duct and a receiving space, the air duct is located in the receiving space, the receiving space is used to install the battery module, the air duct connects the air inlet and the air outlet, the receiving space and the air duct are separated by a first side panel, the first side panel is located on one side of the air duct and is provided with multiple air guide plates, and an air guide channel is formed between adjacent air guide plates, the cold air entering the air inlet is dispersed by the air guide plates and evenly distributed in the air duct, the heat generated by the battery module is transferred to the first side panel, and the cold air in the air duct takes away the heat of the first side panel and is discharged from the air outlet to realize air cooling of the battery module, the air guide plate has a simple structure, is easy to process, and has a good heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0026] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings. In the following description, the same reference numerals represent the same parts.

[0027] Figure 1 A schematic diagram of the three-dimensional structure of the battery pack provided in an embodiment of the present application.

[0028] Figure 2 A top view of the battery pack provided in an embodiment of the present application.

[0029] Figure 3 for Figure 2 Middle AA section view.

[0030] Figure 4 for Figure 3 A partial enlarged view of point B in the middle.

[0031] Figure 5 Schematic diagram of an explosion of the battery pack provided in an embodiment of the present application.

[0032] Figure 6 A three-dimensional schematic diagram of the box structure of the battery box provided in an embodiment of the present application.

[0033] Figure 7 A schematic structural diagram of the bottom plate of the battery box provided in an embodiment of the present application.

[0034] The reference numerals in the figures are:

[0035] 10. Battery pack; 100. Battery box; 110. Box body; 120. Air inlet; 121. Air inlet channel; 130. Air outlet; 131. Air outlet channel; 132. Partition; 133. Air outlet sub-channel; 140. Air duct; 141. First side panel; 142. Air guide plate; 143. Air guide channel; 144. Heat dissipation fins; 145. Heat dissipation channel; 146. Second side panel; 147. Bottom panel; 148. Air guide portion; 149. Third side panel; 150. Accommodation space; 152. Concave space; 160. Top cover; 170. Sealing frame; 180. Box body; 181. Groove; 190. Grille; 200. Battery module; 300. Fan assembly. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0037] See also Figure 1 、 Figure 2 、 Figure 3 and Figure 5 The embodiment of the present application provides a battery box 100, which is applied to a battery pack 10 and is used to install a battery module 200. The battery module 200 includes a cylindrical battery or a blade battery. The battery box 100 includes a box body 110. The box body 110 has a cubic structure. The box body 110 is provided with an air inlet 120, an air outlet 130, an air duct 140 and a receiving space 150. The receiving space 150 is independently provided with the air inlet 120, the air outlet 130 and the air duct 140. The receiving space 150 is used to install the battery module 200. The air duct 140 is located at the bottom of the receiving space 150, and the air duct 140 connects the air inlet 120 and the air outlet 130. Among them, the box body 110 includes a first side panel 141, which is located between the receiving space 150 and the air duct 140. The first side panel 141 is located on one side of the receiving space 150 for installing the battery module 200. The first side plate 141 is located on one side of the air duct 140 and is provided with a plurality of air guide plates 142 , and an air guide channel 143 is formed between any adjacent air guide plates 142 . The air guide channel 143 connects the air inlet 120 and the air outlet 130 .

[0038] In this embodiment, the air deflector 142 disperses the cold air entering the air inlet 120, maximizing its dispersion and evenly distributing it throughout the air duct 140. This ensures that the entire area of ​​the first side panel 141 is exposed to the cold air, resulting in a consistent cooling effect at any location within the battery module, improving the cooling efficiency. The air deflector 142 can be fabricated on the first side panel 141 through injection molding, which is a simple and convenient process.

[0039] In some embodiments, see Figure 3 and Figure 7 The box body 110 includes a bottom plate 147 that encloses the air duct 140 , and the bottom plate 147 is spaced apart from the first side plate 141 .

[0040] For example, see Figure 1 、 Figure 3 、 Figure 5 、 Figure 6 and Figure 7 The box body 110 includes a bottom plate 147, a box body 180, a top cover 160, and a sealing frame 170. The box body 180 is provided with a groove 181, and the top cover 160 is sealed to the box body 180 through the sealing frame 170. The top cover 160 blocks the opening of the groove 181. The top cover 160 and the box body 110 enclose a receiving space 150. The box body 180 includes a first side plate 141, which is arranged near the bottom of the box body 180 and is located below the receiving space 150. The first side plate 141 and part of the side wall of the box body 180 enclose a concave space 152. The side of the box body 180 is provided with an air inlet 120 and an air outlet 130. The concave space 152 connects the air inlet 120 and the air outlet 130. The bottom plate 147 blocks the concave space 152 to form an air duct 140. The bottom plate 147 is integrally welded to the housing 180 via friction welding. This ensures a good seal between the housing 110 and the housing 180. The housing 180 is integrally formed using injection molding and can also be welded, making it easy to manufacture. The air deflector 142 can be fabricated during the manufacturing of the housing 180. The bottom plate 147 is then assembled with the housing 180 to complete the fabrication of the air duct 140. This process is simple and easy to operate.

[0041] In some embodiments, see Figure 6 The first side panel 141 is located on one side of the air duct 140 and is further provided with a plurality of heat dissipation fins 144. The heat dissipation fins 144 are made of a heat conductive material with good thermal conductivity. The heat dissipation fins 144 can be integrally formed with the first side panel 141. The heat dissipation fins 144 are arranged perpendicular to the first side panel 141, and the heat dissipation fins 144 are fixedly connected to the first side panel 141. The heat dissipation fins 144 are closer to the air outlet 130 than the air guide plate 142, and a heat dissipation channel 145 is formed between adjacent heat dissipation fins 144, and the heat dissipation channel 145 is connected to the air guide channel 143.

[0042] In the embodiment of the present application, the heat generated by the battery module 200 is transferred to the heat dissipation fins 144 via the first side plate 141. The cold air entering through the air inlet 120 is directed in different directions by the air guide plate 142. The cold air passes over each heat dissipation fin 144, removing the heat from the heat dissipation fin 144 and being discharged through the air outlet 130. This achieves cooling of the battery module 200. The heat dissipation fins 144 have good thermal conductivity, which improves the cooling effect of the battery module 200.

[0043] In some embodiments, see Figure 6 , the heat dissipation fins 144 extend along the length direction of the box body 110, and along the width direction of the box body 110, multiple heat dissipation fins 144 are arranged in parallel and spaced apart. The heat dissipation fins 144 are in the shape of long strips, and the spacing between any adjacent heat dissipation fins 144 is the same. The distance between any adjacent heat dissipation fins 144 is S1, and the value of S1 is 5mm. The distance between the heat dissipation fins 144 on the side close to the box body 110 and the side wall of the box body 110 is S2, and the value of S2 is 11mm. The heat dissipation fins 144 are highly dense and cover the entire first side plate 141, which not only plays a role in heat dissipation, but also plays a role in increasing the structural strength of the first side plate 141. Reduce the probability of the first side plate 141 being deformed due to bearing the weight of the battery module 200, ensure the space size of the air duct 140, and stabilize the heat dissipation performance.

[0044] In some embodiments, see Figure 6 , the air guide plate 142 is arranged at an angle, and along the width direction of the box body 110, one end of the air guide plate 142 is close to one side of the box body 110, and the other end is close to the other side opposite to the box body 110. The air guide plate 142 is in the shape of a long strip, and the air guide plate 142 is arranged perpendicular to the first side plate 141. Exemplarily, four air guide plates 142 are provided, and the air guide plates 142 are arranged in parallel and spaced apart. The vertical distance between any adjacent air guide plates 142 is the same. For example, the vertical distance between adjacent air guide plates 142 is L1, and the value of L1 is 36 mm. The air guide plate 142 extends from one side of the air inlet 120 to one side of the air outlet 130, and the air guide plate 142 is arranged at an angle. The inclined air guide plate 142 guides the cold air to the heat dissipation fins 144 along the inclined direction.

[0045] In the embodiment of the present application, the air guide plate 142 is tilted to disperse the gathered cold air and guide it in different directions, thereby evenly distributing the cold air in the air duct 140 and improving the heat dissipation effect.

[0046] In some embodiments, see Figure 6The box body 110 also includes a second side panel 146 that forms the air duct 140. The second side panel 146 is perpendicularly connected to the first side panel 141 and is spaced apart from and parallel to the air guide plate 142. When the air guide plate 142 is tilted, the second side panel 146 is also tilted. The second side panel 146 and the air guide plate 142 have the same tilt direction, and an air guide channel 143 is formed between the second side panel 146 and a nearby air guide plate 142. The distance between the second side panel 146 and a nearby air guide plate 142 is L2, and the value of L2 is 31 mm.

[0047] In the embodiment of the present application, a portion of the side wall of the air duct 140 and the air guide plate 142 form an air guide channel 143, which increases the number of air guide channels 143, improves the air guide effect, reduces the number of components, and has a compact structure.

[0048] In some embodiments, see Figure 6 The air inlet 120 and the air outlet 130 are respectively arranged on two opposite side walls of the box body 110. Exemplarily, the box body 110 has a first side wall and a second side wall arranged opposite to each other, the first side wall is close to the air inlet side of the air guide channel 143, and the second side wall is close to the air outlet side of the heat dissipation channel 145. The air inlet 120 is opened on the first side wall, and a grille 190 is provided on the first side wall, and the grille 190 is arranged in alignment with the air inlet 120. The air outlet 130 is opened on the second side wall, and a grille 190 is provided on the second side wall, and the grille 190 is arranged in alignment with the air outlet 130. The grille 190 is detachably fixedly connected to the box body 110, which is convenient for installation and disassembly and maintenance.

[0049] In some embodiments, see Figure 6 The box body 110 is provided with an air inlet channel 121 and an air outlet channel 131. The air inlet channel 121 connects the air inlet 120 and the air duct 140, and is used to install the fan assembly 300. The air outlet channel 131 connects the air outlet 130 and the air duct 140.

[0050] In some embodiments, see Figure 3 Along the height direction of the box body 110 , the air inlet channel 121 and the air outlet channel 131 are located above the air duct 140 .

[0051] Exemplarily, air duct 140 has an air inlet side and an air outlet side. The air inlet side is located below air inlet channel 121, and the air outlet side is located below air outlet channel 131. Air inlet channel 121 and air outlet channel 131 are independently provided from receiving space 150. Cool air generated by fan assembly 300 located within air inlet channel 121 enters air duct 140 from air inlet channel 121, enters air outlet channel 131 after passing through air duct 140, and flows out from air outlet 130.

[0052] In the embodiment of the present application, the air inlet channel 121, the air outlet channel 131 and the air duct 140 are arranged vertically, which increases the length of the circulation path of the cold air within a limited space and improves the heat dissipation effect.

[0053] In some embodiments, see Figure 6 A plurality of partitions 132 are provided in the air outlet channel 131 , and the partitions 132 are fixedly connected to the box body 110 . The partitions 132 divide the air outlet channel 131 into a plurality of air outlet sub-channels 133 , and each air outlet sub-channel 133 is respectively connected to the air duct 140 .

[0054] In some embodiments, see Figure 6 The box body 110 includes a third side panel 149 that encloses the air outlet channel 131. The third side panel 149 is located between the air outlet channel 131 and the receiving space 150. The third side panel 149 is smoothly connected to the side of the first side panel 141 that faces away from the air inlet. For example, the third side panel 149 is smoothly connected to the first side panel 141 via an arc-shaped panel. The smooth transition between the third side panel 149 and the first side panel 141 facilitates the flow of cold air from the air duct 140 to the air outlet channel 131, reduces wind loss, and improves heat dissipation.

[0055] In some embodiments, see Figure 4 and Figure 7 The bottom plate 147 is provided with an air guide 148, which is located on the air inlet side of the air duct 140. The air guide 148 is located opposite the air outlet side of the air inlet channel 121 and is used to guide the cold air from the air outlet channel 131 into the air duct 140. The air guide 148 is elongated and located at the end of the bottom plate 147. The air guide 148 extends along the width of the box body 110, and the side of the air guide 148 facing away from the air duct 140 is in contact with the inner wall of the box body 110. The air guide 148 and the bottom plate 147 can be integrally formed using an injection molding process.

[0056] In the embodiment of the present application, air inlet duct 121 and air duct 140 are arranged perpendicularly. Cold air enters air duct 140 from air inlet duct 121 and acts perpendicularly on bottom plate 147, resulting in high wind resistance and loss, which is not conducive to the circulation of cold air. By providing air guide 148 to guide cold air from air outlet duct 131 into air duct 140, wind loss is reduced and the cooling effect is improved.

[0057] In some embodiments, see Figure 3 、 Figure 4 and Figure 7 The side of the air guide 148 that faces the air inlet passage 121 is inclined. The cross-section of the air guide 148, perpendicular to its extension, is triangular. The side of the air guide 148 that faces the air inlet passage 121 is closer to one end of the air inlet passage 121 than the other end is to the sidewall of the cabinet body 110.

[0058] In the embodiment of the present application, one side surface of the air guide portion 148 is inclined, and the inclined surface is used to change the flow direction of the fluid and reduce the air volume loss.

[0059] In some embodiments, see Figure 7 The side of the air guide portion 148 opposite the air inlet channel 121 is an arc. The arc curves away from the air guide plate 142. The radius of the arc is 30 mm. The central angle corresponding to the arc length is less than 45°. The height of the air guide portion 148 is H, which is 20 mm.

[0060] In the embodiment of the present application, the side surface of the air guide portion 148 opposite to the air inlet channel 121 is an arc surface, so that the cold air flowing out of the air inlet channel 121 smoothly transitions into the air duct 140, reducing cold loss and improving the cooling effect.

[0061] See also Figure 1 、 Figure 2 、 Figure 3 and Figure 5 The present application also provides a battery pack 10, comprising any of the above-described battery boxes 100, a battery module 200, and a fan assembly 300. The battery module 200 is installed in the receiving space 150, and the battery module 200 is located above the air duct 140. The fan assembly 300 is installed in the box body 110, and the fan assembly 300 is arranged opposite the air inlet 120. Exemplarily, the fan assembly 300 is a fan.

[0062] In this embodiment of the present application, the cold air generated by the fan assembly 300 passes through the air duct 140, cools the battery module 200, and is then discharged from the air outlet 130 of the battery box 100, thereby achieving air cooling of the battery pack. The battery pack of this embodiment has the same technical effects as the battery box 100 described above and will not be further described.

[0063] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0064] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more features.

[0065] The above is a detailed introduction to the battery box and battery pack provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for technical personnel in this field, based on the ideas of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A battery box (100), characterized in that: include: The box body (110) is provided with an air inlet (120), an air outlet (130), an air duct (140) and a receiving space (150), wherein the receiving space (150) is used to install the battery module (200), the air duct (140) is located at the bottom of the receiving space (150), and the air duct (140) is connected to the air inlet (120) and the air outlet (130), wherein: The box body (110) includes a first side plate (141), the first side plate (141) is located between the receiving space (150) and the air duct (140), and the first side plate (141) is located on a side of the air duct (140) and is provided with a plurality of air guide plates (142), and an air guide channel (143) is formed between any adjacent air guide plates (142).

2. The battery box (100) according to claim 1, characterized in that The first side plate (141) is located on one side of the air duct (140) and is further provided with a plurality of heat dissipation fins (144); the heat dissipation fins (144) are closer to the air outlet (130) than the air guide plate (142); a heat dissipation channel (145) is formed between adjacent heat dissipation fins (144); and the heat dissipation channel (145) is connected to the air guide channel (143).

3. The battery box (100) according to claim 2, characterized in that: The heat dissipation fins (144) extend along the length direction of the box body (110), and along the width direction of the box body (110), a plurality of the heat dissipation fins (144) are arranged in parallel and at intervals.

4. The battery box (100) according to claim 1, characterized in that The air guide plate (142) is tilted and arranged along the width direction of the box body (110), with one end of the air guide plate (142) close to one side of the box body (110) and the other end close to the other side opposite to the box body (110).

5. The battery box (100) according to claim 4, characterized in that: The box body (110) further includes a second side plate (146) surrounding the air duct (140), wherein the second side plate (146) is vertically connected to the first side plate (141), and the second side plate (146) is arranged parallel to and spaced apart from the air guide plate (142).

6. The battery box (100) according to any one of claims 1 to 5, characterized in that: The air inlet (120) and the air outlet (130) are respectively and correspondingly arranged on two opposite side walls of the box body (110).

7. The battery box (100) according to claim 6, characterized in that: An air inlet channel (121) and an air outlet channel (131) are provided in the box body (110); the air inlet channel (121) is connected to the air inlet (120) and the air duct (140); the air inlet channel (121) is used to install a fan assembly (300); and the air outlet channel (131) is connected to the air outlet (130) and the air duct (140).

8. The battery box (100) according to claim 7, characterized in that: Along the height direction of the box body (110), the air inlet channel (121) and the air outlet channel (131) are located above the air duct (140).

9. The battery box (100) according to claim 8, characterized in that: The box body (110) includes a third side panel (149) surrounding the air outlet channel (131), the third side panel (149) is located between the air outlet channel (131) and the receiving space (150), and the third side panel (149) is smoothly transitionally connected to the side of the first side panel (141) facing away from the air inlet (120).

10. The battery box (100) according to claim 8, characterized in that: A partition (132) is provided in the air outlet channel (131), and the partition (132) divides a plurality of independent air outlet sub-channels (133), and the air outlet sub-channels (133) are respectively communicated with the air duct (140).

11. The battery box (100) according to claim 8, characterized in that: The box body (110) further includes a bottom plate (147) that encloses the air duct (140), and the bottom plate (147) is spaced apart from the first side plate (141).

12. The battery box (100) according to claim 11, characterized in that: An air guide portion (148) is provided on the bottom plate (147), and the air guide portion (148) is located on the air inlet side of the air duct (140). The air guide portion (148) is arranged opposite to the air outlet side of the air inlet channel (121).

13. The battery box (100) according to claim 12, characterized in that: The side surface of the air guide portion (148) opposite to the air inlet channel (121) is inclined.

14. The battery box (100) according to claim 12, characterized in that: A side surface of the air guide portion (148) opposite to the air inlet channel (121) is an arc surface.

15. A battery pack, characterized in that: include: The battery box (100) according to any one of claims 1 to 14; A battery module (200) is installed in the receiving space (150), and the battery module (200) is located above the air duct (140); The fan assembly (300) is installed in the box body (110), and the fan assembly (300) is arranged opposite to the air inlet (120).

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