Soft package battery and electric equipment

Abstract

The utility model discloses a soft package battery and electric equipment, the soft package battery comprises a shell and a plurality of battery cells arranged in the shell, and the shell comprises first side plates oppositely arranged in the X direction and second side plates oppositely arranged in the Y direction perpendicular to the X direction. Wherein a radiator is arranged in the shell 22, and a plurality of battery cells are respectively arranged on two sides of the radiator; a plurality of first radiating fins are arranged in the radiator, and a first radiating channel is formed between every two adjacent first radiating fins; the first side plate is provided with an opening communicated with the first heat dissipation channel; a plurality of second heat dissipation fins are arranged outside the second side plate, and a second heat dissipation channel is formed between every two adjacent second heat dissipation fins; and the extension direction of the second heat dissipation channel and the extension direction of the first heat dissipation channel form an included angle, so that the heat of the battery can be conducted and dissipated inside and outside the battery and in different directions, and the local heat of the battery is prevented from being too high.

Description

Technical Field

[0001] This application relates to the field of new energy technology, and in particular to a soft-pack battery and an electrical device incorporating the soft-pack battery. Background Technology

[0002] Heat dissipation in battery modules has always been a major concern in the industry, especially in high-power applications, which not only have significant heat dissipation requirements but also demand high heat dissipation efficiency. A well-designed heat dissipation structure can not only improve battery performance and lifespan but also ensure its safe operation. Utility Model Content

[0003] In view of this, the purpose of this application is to provide a pouch battery and an electrical device equipped with a pouch battery, which has a good heat dissipation structure and can achieve high heat dissipation efficiency.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] A pouch battery includes a casing and a plurality of battery cells disposed within the casing. The casing includes a first side plate arranged opposite each other in an X direction and a second side plate arranged opposite each other in a Y direction perpendicular to the X direction. A heat sink is disposed within the casing, and the plurality of battery cells are disposed on both sides of the heat sink. The heat sink has a plurality of first heat dissipation fins, with adjacent first heat dissipation fins forming a first heat dissipation channel. The first side plate has an opening communicating with the first heat dissipation channel. The second side plate has a plurality of second heat dissipation fins disposed outside, with adjacent second heat dissipation fins forming a second heat dissipation channel. The extending direction of the second heat dissipation channel is arranged at an angle to the extending direction of the first heat dissipation channel.

[0006] Optionally, in the above-mentioned pouch battery, multiple first heat dissipation fins are arranged side by side along the Z direction, and the plane of each first heat dissipation fin is parallel to the XY plane.

[0007] Optionally, in the above-mentioned pouch battery, multiple second heat dissipation fins are arranged side by side along the X direction, and the plane of each second heat dissipation fin is parallel to the YZ plane.

[0008] Optionally, in the above-mentioned pouch battery, the battery cell includes a first battery cell group and a second battery cell group arranged side by side in the Y direction; the heat sink has a plurality of first heat dissipation fins arranged side by side near the inner side of the first battery cell group to form a first heat dissipation fin group; the heat sink has a plurality of first heat dissipation fins arranged side by side near the inner side of the second battery cell group to form a second heat dissipation fin group; there is a ventilation gap greater than zero between the first heat dissipation fin group and the second heat dissipation fin group.

[0009] Optionally, in the above-mentioned pouch battery, at least some of the battery cells are arranged side-by-side along the X direction. Specifically: the side of the battery cell closest to the heat sink is a first arc-shaped side; the outer surface of the heat sink's side plate has multiple first grooves arranged side-by-side along the X direction, adapted to the first arc-shaped side, with thermally conductive adhesive disposed between the first grooves and the first arc-shaped side; and / or, the side of the battery cell closest to the second side plate is a second arc-shaped side; the inner wall of the second side plate has multiple second grooves arranged side-by-side along the X direction, adapted to the second arc-shaped side, with thermally conductive adhesive disposed between the second grooves and the second arc-shaped side.

[0010] Optionally, in the above-mentioned pouch battery, the side plate of the heat sink is provided with a plurality of third grooves arranged side by side along the X direction on the side away from the cell.

[0011] Optionally, in the above-mentioned pouch battery, the openings of the two oppositely arranged first side plates are respectively an air inlet and an air outlet; taking the center plane between the two first side plates as the dividing plane, the top cover of the pouch battery is divided into a first top surface area near the air outlet and a second top surface area near the air inlet; the area of ​​the first top surface area covered by the top heat dissipation fins is greater than the area of ​​the second top surface area covered by the top heat dissipation fins.

[0012] Optionally, in the above-mentioned soft-pack battery, a vertical guide rail is also provided on the outside of the soft second side plate, which can abut against the inner wall of the battery compartment; the protrusion height of the vertical guide rail on the second side plate is greater than the protrusion height of the second heat dissipation fins on the second side plate.

[0013] Optionally, in the above-mentioned soft-pack battery, a plurality of second heat dissipation fins are respectively provided on both sides of the vertical guide rail; the bottom of the vertical guide rail facing the inner wall of the battery compartment is provided with a gradually thinning oblique cut surface.

[0014] Optionally, in the above-mentioned soft-pack battery, a boss is provided on the Z-direction side of the outer side of the second side plate, and the protrusion height of the boss on the second side plate is greater than the protrusion height of the second heat dissipation fin on the second side plate.

[0015] Optionally, in the above-mentioned pouch battery, the boss includes:

[0016] The root is connected to the outer side of the second side plate and also to the first side plate;

[0017] The plate portion is located on the side of the root portion away from the second side plate and is connected to the root portion;

[0018] The end is located on the side of the root away from the second side plate and connected to the root; and the end includes a first end located at the top Z direction of the plate and a second end located at the bottom Z direction of the plate, the first end being connected to the top cover of the pouch battery and the second end being connected to the bottom plate of the pouch battery.

[0019] Optionally, in the above-mentioned soft-pack battery, a pad is provided at the bottom corner of the outer casing; the side of the pad is closer to the side wall of the battery compartment than the side of the outer casing; and the lower part of the side of the pad is provided with a chamfer.

[0020] An electrical device includes a body and a battery, wherein the body is provided with a battery compartment for mounting the battery. The battery includes a pouch cell as described above; a reserved gap is provided between the inner wall of the battery compartment and the pouch cell to form a heat dissipation channel.

[0021] As can be seen from the above technical solutions, the soft-pack battery and electrical device provided in this application not only have a heat sink installed between adjacent cell groups inside the battery, where the first heat dissipation fins and first heat dissipation channel in the heat sink can directly and promptly dissipate heat and cool the battery interior, preventing heat accumulation; but also have a heat dissipation structure, namely a second heat dissipation fin and a second heat dissipation channel, installed on the outer surface of the battery casing. The second heat dissipation fins and second heat dissipation channel can promptly dissipate heat and cool the cells that are far from the heat sink but close to the battery casing, preventing heat accumulation. Therefore, it is evident that the soft-pack battery provided in this application has good heat dissipation performance for both the inner and outer cells.

[0022] Furthermore, since the extension direction of the first heat dissipation channel formed by the first heat dissipation fins in the internal heat sink of the battery is arranged at an angle to the extension direction of the second heat dissipation channel formed by the second heat dissipation fins on the outside of the battery, the heat of the battery can be conducted and dissipated in different directions, thus avoiding excessive local heat in the battery. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is an isometric view of a pouch battery provided in an embodiment of this application.

[0025] Figure 2 This is a front view of a pouch battery provided in an embodiment of this application.

[0026] Figure 3 The image shows a left view of a pouch battery provided in an embodiment of this application.

[0027] Figure 4 This is an exploded view of the external structure of a pouch battery provided in an embodiment of this application.

[0028] Figure 5 This is a schematic diagram of the internal partial structure of a heat sink located inside a pouch battery, provided as an embodiment of this application.

[0029] in:

[0030] 1-First side panel, 10-Opening,

[0031] 2-Second side plate, 20-Second groove, 21-Second heat dissipation fin, 22-Boss structure.

[0032] 3-Padded block, 31-Beveled angle,

[0033] 4-Radiator, 40-Ventilation gap, 41-First heat dissipation fin,

[0034] 401 - First groove, 402 - Third groove

[0035] 411 - First heat dissipation fin assembly, 412 - Second heat dissipation fin assembly

[0036] 5-Vertical guide rail, 51-Beveled surface,

[0037] 6-Top cover, 61-Top heat dissipation fins,

[0038] 7-Base plate. Detailed Implementation

[0039] 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. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] Please see Figure 1 This application provides a pouch battery, which refers to a battery cell whose internal cells are pouch cells. A pouch cell is a cell unit that uses an aluminum-plastic composite film as its outer shell to encapsulate its internal structure. It is generally a lithium-ion cell, and its internal structure includes a positive electrode, a negative electrode, a separator, and an electrolyte. Furthermore, the outer shell of a pouch battery is generally made of a rigid material, such as... Figure 1As shown, the outer casing of the pouch battery includes a first side plate 1 arranged opposite to each other in the X direction, and a second side plate 2 arranged opposite to each other in the Y direction perpendicular to the X direction. The first side plate 1 is the large surface of the battery, the second side plate 2 is the side surface of the battery, the X direction is the direction perpendicular to the large surface of the battery, the Y direction is the direction perpendicular to the side surface of the battery, and the Z direction is the vertical direction from the top to the bottom of the battery. The X, Y, and Z directions are perpendicular to each other.

[0041] In specific implementation, a heat sink 4 is provided inside the outer casing of the soft-pack battery, and multiple battery cells are respectively provided on both sides of the heat sink 4; multiple first heat dissipation fins 41 are provided in the heat sink 4, and a first heat dissipation channel is formed between adjacent first heat dissipation fins 41; the first side plate 1 is provided with an opening 10 corresponding to and communicating with the first heat dissipation channel; multiple second heat dissipation fins 21 are provided outside the second side plate 2, and a second heat dissipation channel is formed between adjacent second heat dissipation fins 21; the extension direction of the second heat dissipation channel is arranged at an angle to the extension direction of the first heat dissipation channel. For example, multiple first heat dissipation fins 41 are arranged side by side along the Z direction, and the plane of each first heat dissipation fin 41 is parallel to the XY plane (i.e., the plane formed by the "X direction" and the "Y direction"); multiple second heat dissipation fins 21 are arranged side by side along the X direction, and the plane of each second heat dissipation fin 21 is parallel to the YZ plane (i.e., the plane formed by the "Y direction" and the "Z direction"). Thus, the first heat dissipation fin 41 and the second heat dissipation fin 21 are perpendicular to each other, and the extension direction of the second heat dissipation channel is perpendicular to the extension direction of the first heat dissipation channel. However, this is not a limitation. In other embodiments, the plane containing the first heat dissipation fin 41 can be tilted relative to the XY plane, and / or the plane containing the second heat dissipation fin 21 can be tilted relative to the YZ plane, thereby setting the angle between the extension direction of the second heat dissipation channel and the extension direction of the first heat dissipation channel to other degrees, such as 30°, 45°, 60°, 70°, 80°, 85°, or any other angle value within the range of 0 to 90°. It is necessary to ensure that the inlet and outlet of the first heat dissipation channel formed between adjacent first heat dissipation fins 41 are respectively connected to the openings 10 on the first side plates 1 on both sides of the battery.

[0042] As can be seen, the soft-pack battery provided in this application not only has a heat sink 4 installed between adjacent cell groups inside the battery, through which the first heat dissipation fins 41 and the first heat dissipation channel in the heat sink 4 can directly dissipate heat and cool down the inside of the battery in a timely manner, avoiding heat accumulation; but also has a heat dissipation structure, namely a second heat dissipation fin 21 and a second heat dissipation channel, installed on the outer surface of the battery casing. The second heat dissipation fins 21 and the second heat dissipation channel can promptly dissipate heat and cool down the cells that are far from the heat sink 4 but close to the battery casing, avoiding heat accumulation. Therefore, it is evident that both the inner and outer cells of the soft-pack battery provided in this application have good heat dissipation performance.

[0043] Furthermore, assuming that the extension direction of the first heat dissipation channel formed by the first heat dissipation fin 41 in the internal heat sink 4 of the battery is M, and the extension direction of the second heat dissipation channel formed by the second heat dissipation fin 21 on the outside of the battery is N, then the airflow direction in the first heat dissipation channel is M, and the airflow direction in the second heat dissipation channel is N. Since the extension directions of the first heat dissipation channel and the second heat dissipation channel are arranged at an angle, that is, M and N are arranged at an angle, that is, the angle between M and N is greater than zero, so that the heat of the battery can be conducted and dissipated in different directions, avoiding excessive local heat in the battery.

[0044] For example, taking the extension directions of the first heat dissipation channel and the second heat dissipation channel as perpendicular to each other (i.e., M and N are perpendicular to each other), assuming that the plane of the first heat dissipation fin 41 in the heat sink 4 inside the battery is perpendicular to the first side plate 1, and the plane of the second heat dissipation fin 21 on the outside of the battery is parallel to the first side plate 1, when the airflow direction in the second heat dissipation channel formed by the second heat dissipation fin 21 is transmitted from top to bottom, the temperature of the bottom of the battery cell is relatively higher than the temperature of the top of the battery cell because the airflow gradually absorbs heat and the temperature gradually increases during the transmission process. At this time, if the airflow direction in the heat sink 4 is from the front opening 10 of the battery to the rear opening 10 (i.e., ... Figure 1 The airflow is transmitted in the L direction (as shown in the image), so that the opening 10 of the first side plate 1 located on the front side of the battery is the inlet and the airflow temperature at the inlet is relatively low. Therefore, the heat dissipation efficiency of the battery cell (including the bottom of the battery cell near this location) is high, which can effectively prevent the accumulation of heat in the battery cell at the bottom location. Alternatively, in other embodiments, the airflow direction in the heat sink 4 may be from the rear opening 10 of the battery to the front opening 10 (i.e., in the direction of L). Figure 1 The airflow is transmitted in the opposite direction to the L direction in the battery, so the opening 10 of the first side plate at the rear of the battery is the inlet and the airflow temperature at the inlet is low. Therefore, the heat dissipation efficiency of the battery cell (including the bottom of the battery cell near this location) is high, which can effectively prevent the accumulation of heat in the bottom location of the battery cell. It can be seen that in the soft pack battery provided in this application embodiment, the first heat dissipation fins 41 and the second heat dissipation fins 21 arranged at an angle can achieve a good heat dissipation effect on the entire battery cell, avoiding the accumulation of heat in the center and bottom of the battery.

[0045] Please see Figure 2In some embodiments, the cells in the aforementioned pouch battery include a first cell group and a second cell group arranged side by side in the Y direction; a plurality of first heat dissipation fins 41 are arranged side by side on the inner side of the first cell group (i.e., the side of the side plate inside the pouch battery adjacent to the first cell group), forming a first heat dissipation fin group 411; a plurality of first heat dissipation fins 41 are arranged side by side on the inner side of the second cell group (i.e., the side of the side plate inside the pouch battery adjacent to the second cell group), forming a second heat dissipation fin group 412; there is a ventilation gap 40 greater than zero between the first heat dissipation fin group 411 and the second heat dissipation fin group 412, so that the interior of the heat dissipation 4 has a sufficiently large space to meet the large ventilation requirements and achieve a high heat dissipation efficiency. In specific implementation, the length of the first heat dissipation fin 41 in the first heat dissipation fin group 411 and the ventilation gap 40 between the first heat dissipation fin group 411 and the second heat dissipation fin group 412 in the Y direction can be specifically designed according to comprehensive factors such as the battery, its power and heat dissipation requirements, and the working environment. For example, please refer to... Figure 2 In some products, assuming that the lengths of the first heat dissipation fin 41 and the ventilation gap 40 between the first heat dissipation fin group 411 and the second heat dissipation fin group 412 in the Y direction are a, b, and c respectively, then the value of a can be any value within the range of 5mm to 20mm, the value of b can be any value within the range of 5mm to 20mm, and the value of c can be any value within the range of 5mm to 20mm. For example, a = b = 13.0mm or 13.4mm or 13.6mm, and c = 12.5mm or 12.8mm or 13.0mm.

[0046] In some embodiments, the battery cells in the first and second battery cell groups are arranged side-by-side along the X direction, with the side of each cell near the heat sink 4 forming a first arc-shaped side and the side of each cell near the second side plate 2 forming a second arc-shaped side. Correspondingly, please refer to... Figure 4The outer surface of the side plate of the heat sink 4 has multiple first grooves 401 arranged side-by-side along the X direction to adapt to the first arc-shaped side surfaces of multiple battery cells. Thermally conductive adhesive is provided between each first groove 401 and the first arc-shaped side surface. The inner wall of the second side plate 2 has multiple second grooves 20 arranged side-by-side along the X direction to adapt to the second arc-shaped side surfaces of multiple battery cells. Thermally conductive adhesive is provided between each second groove 20 and the second arc-shaped side surface. The aforementioned first and second arc-shaped side surfaces can avoid the formation of sharp corner structures with concentrated heat on the surface of the battery cells and avoid the risk of localized high temperatures in the battery cells. Moreover, the aforementioned first grooves 401 and second grooves 20 can limit and conduct heat to each battery cell, thereby ensuring that the position of each battery cell is fixed and does not wobble or shift, and ensuring that a reserved gap is maintained between adjacent battery cells so that heat dissipation can be uniform around each battery cell, avoiding the risk of heat accumulation in individual battery cells or certain areas.

[0047] Further, please see Figure 5 In some embodiments, a plurality of third grooves 402 are arranged side by side along the X direction on the side of the heat sink 4 away from the battery cell. These third grooves 402 increase the structural strength of the heat sink 4's side plate and increase the surface area inside the heat sink that comes into contact with the airflow, thereby improving heat dissipation efficiency. Furthermore, the root of each first heat dissipation fin 41 is adapted to the curved structure formed by the plurality of third grooves 402. Thus, when the first heat dissipation fin 41 is impacted or compressed by an external force in the X direction, the convex ridge structure formed between adjacent third grooves 402 (i.e., the sidewall of the third groove 402) can support the first heat dissipation fin 41, preventing root connection failure and improving the connection stability of the first heat dissipation fin 41 on the side plate of the heat sink 4.

[0048] In the aforementioned pouch battery, the openings 10 of the two oppositely arranged first side plates 1 are respectively the air inlet and the air outlet, that is, the front and rear sides of the battery are the air inlet side and the air outlet side (or the front and rear sides of the battery are the air outlet side and the air inlet side). Since the temperature on the air outlet side of the battery is relatively higher than that on the air inlet side, in some embodiments: the center plane between the two first side plates 1 is used as the dividing plane (i.e.,... Figure 1 In the section AA (the dividing surface), the top cover 6 of the soft-pack battery is divided into a first top surface area near the air outlet side and a second top surface area near the air inlet side. The area of ​​the first top surface area covered by the top heat dissipation fins 61 is larger than the area of ​​the second top surface area covered by the top heat dissipation fins 61. Specifically, as shown... Figure 1 As shown in the diagram, the side protruding from the center of the top cover 6 is the air outlet side, i.e. Figure 1 The opening 10 marked in the middle is the air outlet; correspondingly, the relatively flat side of the center area of ​​the top cover 6 is the air inlet side. Figure 1The side opposite to the battery side where the opening 10 is marked is the air intake side. Alternatively, in other embodiments, the side of the top cover 6 that protrudes from the center area can also be the air intake side, i.e. Figure 1 The opening 10 marked in the middle is the air inlet; correspondingly, the relatively flat side of the center area of ​​the top cover 6 is the air outlet. Figure 1 The side opposite to the battery side where the opening 10 marked in the middle is located is the air outlet side.

[0049] This application embodiment also provides an electrical device, which includes a body and the aforementioned pouch battery. The body is provided with a battery compartment for installing the pouch battery. The opening and inner cavity of the battery compartment have X-direction dimensions at least partially located and Y-direction dimensions at least partially located in any XY section that are slightly larger than the dimensions of the pouch battery at the same location. This is to provide a reserved gap between the inner wall of the battery compartment and the pouch battery that can form a heat dissipation channel, ensuring that the periphery of the pouch battery can be ventilated and cooled through the reserved gap.

[0050] Please see Figure 1 and Figure 3 In some embodiments, protrusions 22 are respectively provided on the outer surfaces of the front and rear ends of the second side plate 2. These protrusions 22 can provide positioning and protection for the peripheral corners of the soft-pack battery. Specifically, the protrusion height of the protrusion 22 on the second side plate 2 is greater than the protrusion height of the second heat dissipation fins 21 on the second side plate 2. Moreover, preferably, the main body of the protrusion 22 is a plate-shaped structure with a weight-reducing effect. See [link to details] for more information. Figure 4 The outer side surface of the second side plate 2 has protrusions 22 on its Z-direction sides at both ends. The protrusion height of the protrusions 22 on the second side plate 2 is greater than that of the second heat dissipation fins 21 on the second side plate 2. The protrusions 22 include a root 221, a plate 222, and an end 223. The root 221 is integrally connected to the outer side surface of the second side plate 2 and is connected to the first side plate 1 by fasteners. The plate 222 is located on the side of the root 221 away from the second side plate 2 and is connected to the root 221. The end 223 is located on the side of the root 221 away from the second side plate 2 and is connected to the root 221. The end 223 includes a first end located at the top Z-direction of the plate 222 and a second end located at the bottom Z-direction of the plate 222. The first end is connected to the top cover 6 of the soft-pack battery, and the second end is connected to the bottom plate 7 of the soft-pack battery. It can be seen that the plate structure (i.e. plate portion 222) in the boss 22 can achieve the effect of weight reduction. At the same time, the root portion 221 can ensure the fastening connection strength between the second side plate 2 and the first side plate 1, and the end portion 223 can ensure the fastening connection strength between the second side plate 2 and the top cover 6 and the bottom plate 7.

[0051] Correspondingly, the inner wall of the battery compartment is a non-planar surface adapted to the outer contour of the second side panel 2. Because a reserved gap is provided between the inner wall of the battery compartment and the pouch battery to form a heat dissipation channel, there is a gap greater than zero between the inner wall of the battery compartment and the second side panel 2. Based on this, to improve the positioning effect of the pouch battery within the battery compartment, a vertical guide rail 5 is also provided on the outside of the second side panel 2 of the pouch battery, capable of abutting against the inner wall of the battery compartment. Multiple second heat dissipation fins 21 are provided on both sides of the vertical guide rail 5, and the protrusion height of the vertical guide rail 5 on the second side panel 2 is greater than the protrusion height of the second heat dissipation fins 21 on the second side panel 2, but less than the protrusion height of the boss 22 on the second side panel 2. Therefore, when the pouch battery is installed into the battery compartment, it can abut against the inner wall of the battery compartment via the vertical guide rail 5. Furthermore, the vertical guide rail 5 not only improves the structural strength of the second side panel 2 and ensures the fitting accuracy between the battery and the side wall of the battery compartment, but also directly transfers heat to the battery compartment, resulting in high heat dissipation efficiency.

[0052] Furthermore, in some embodiments, the bottom of the vertical guide rail 5 is provided with a gradually thinning beveled surface 51 facing the inner wall of the battery compartment. It can be seen that when the battery is installed into the battery compartment, the beveled surface 51 serves as a guide; and after the battery is fully installed into the battery compartment, the beveled surface 51 and the bottom of the battery compartment side wall form an airflow channel communicating with the second heat dissipation channel, thereby facilitating uniform heat dissipation around the battery.

[0053] Please see Figure 2 and Figure 3 In some embodiments, a pad 3 is provided at the bottom corner of the pouch battery casing. Furthermore, the bottom surface of the pad 3 is closer to the bottom wall of the battery compartment than the bottom surface of the battery casing, and the side surface of the pad 3 is closer to the side wall of the battery compartment than the side surface of the battery casing. Further, in some embodiments, the lower part of the side surface of the pad 3 has a chamfered angle. Specifically, this chamfered angle refers to the angle t of the lower part of the outer side surface of the pad 3 relative to the vertical plane being greater than zero. The value of t is preferably set to any value within the range of 10° to 45°, such as 10°, 12°, 15°, 17°, 20°, 30°, 32°, or 45°. This chamfered angle facilitates weight reduction and allows an airflow channel to be formed between the pad 3 and the side wall of the battery compartment, communicating with the second heat dissipation channel. This creates interconnected airflow channels at the bottom and around the battery, connecting the airflow channels at the front, back, left, right, and sides of the battery, resulting in a uniform airflow effect and preventing localized overheating of the battery.

[0054] In practice, the electrical device can be an electric vehicle, home appliance, smart device, drone, charging device, etc. This application does not specifically limit the type of electrical device; it can be any device capable of using the pouch battery.

[0055] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed.

[0056] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0057] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pouch battery, comprising a casing and a plurality of cells disposed within the casing, the casing comprising a first side plate (1) arranged opposite to each other in an X direction, and a second side plate (2) arranged opposite to each other in a Y direction perpendicular to the X direction, characterized in that: The outer casing is provided with a heat sink (4), and multiple battery cells are provided on both sides of the heat sink (4); multiple first heat dissipation fins (41) are provided in the heat sink (4), and a first heat dissipation channel is formed between adjacent first heat dissipation fins (41); the first side plate (1) is provided with an opening (10) communicating with the first heat dissipation channel. The second side plate (2) is provided with a plurality of second heat dissipation fins (21), and a second heat dissipation channel is formed between adjacent second heat dissipation fins (21); the extension direction of the second heat dissipation channel is arranged at an angle to the extension direction of the first heat dissipation channel.

2. The soft-pack battery according to claim 1, characterized in that, Multiple first heat dissipation fins (41) are arranged side by side along the Z direction perpendicular to the XY plane, and the plane of each first heat dissipation fin (41) is parallel to the XY plane.

3. The soft-pack battery according to claim 1, characterized in that, Multiple second heat dissipation fins (21) are arranged side by side along the X direction, and the plane of each second heat dissipation fin (21) is parallel to the YZ plane.

4. The soft-pack battery according to claim 1, characterized in that, The battery cells include a first battery cell group and a second battery cell group arranged side by side in the Y direction; The radiator (4) has multiple first heat dissipation fins (41) arranged side by side near the inner side of the first battery cell assembly, forming a first heat dissipation fin assembly (411). The radiator (4) has multiple first heat dissipation fins (41) arranged side by side near the inner side of the second battery cell assembly, forming a second heat dissipation fin assembly (412). There is a ventilation gap (40) greater than zero between the first heat dissipation fin group (411) and the second heat dissipation fin group (412).

5. The soft-pack battery according to claim 4, characterized in that, At least some of the said cells are arranged side by side along the X direction, wherein: The side of the battery cell near the heat sink (4) is a first arc-shaped side; the outer surface of the side plate of the heat sink (4) is provided with a plurality of first grooves (401) that are adapted to the first arc-shaped side along the X direction, and thermally conductive adhesive is provided between the first grooves (401) and the first arc-shaped side. And / or, the side of the battery cell near the second side plate (2) is a second arc-shaped side; the inner wall of the second side plate (2) is provided with a plurality of second grooves (20) adapted to the second arc-shaped side along the X direction, and thermally conductive adhesive is provided between the second groove (20) and the second arc-shaped side.

6. The soft-pack battery according to claim 1, characterized in that, The side plate of the heat sink (4) is provided with a plurality of third grooves (402) arranged side by side along the X direction on the side away from the battery cell.

7. The soft-pack battery according to claim 1, characterized in that, The openings (10) of the two oppositely arranged first side plates (1) are respectively an air inlet and an air outlet; Using the central plane between the two first side plates (1) as the dividing plane, the top cover (6) of the soft-pack battery is divided into a first top surface area near the air outlet and a second top surface area near the air inlet; The area of ​​the first top surface region covered by the top heat dissipation fins (61) is greater than the area of ​​the second top surface region covered by the top heat dissipation fins (61).

8. The soft-pack battery according to claim 1, characterized in that, The second side plate (2) is also provided with a vertical guide rail (5) that can abut against the inner wall of the battery compartment; The vertical guide rail (5) protrudes higher on the second side plate (2) than the second heat dissipation fin (21) protrudes higher on the second side plate (2).

9. The soft-pack battery according to claim 8, characterized in that, Multiple second heat dissipation fins (21) are respectively provided on both sides of the vertical guide rail (5); The bottom of the vertical guide rail (5) is provided with a gradually thinning oblique cut surface (51) on the side facing the inner wall of the battery compartment.

10. The soft-pack battery according to claim 1, characterized in that, A boss (22) is provided on the Z-direction side of the outer side of the second side plate (2), and the protrusion height of the boss (22) on the second side plate (2) is greater than the protrusion height of the second heat dissipation fin (21) on the second side plate (2).

11. The soft-pack battery according to claim 10, characterized in that, The boss (22) includes: The root (221) is connected to the outer side of the second side plate (2) and to the first side plate (1); The plate portion (222) is located on the side of the root portion (221) away from the second side plate (2) and is connected to the root portion (221); The end (223) is located on the side of the root (221) away from the second side plate (2) and is connected to the root (221); and the end (223) includes a first end located at the top Z direction of the plate (222) and a second end located at the bottom Z direction of the plate (222), the first end being connected to the top cover (6) of the soft pack battery and the second end being connected to the bottom plate (7) of the soft pack battery.

12. The soft-pack battery according to claim 1, characterized in that, A pad (3) is provided at the bottom corner of the outer shell; The side of the pad (3) is closer to the side wall of the battery compartment than the side of the outer shell; and the lower part of the side of the pad (3) is provided with a chamfer.

13. An electrical device, comprising a body and a battery, wherein the body is provided with a battery compartment for mounting the battery, characterized in that: The battery includes the pouch cell according to any one of claims 1 to 12; A reserved gap is provided between the inner wall of the battery compartment and the soft-pack battery to form a heat dissipation channel.

Images