Battery pack and electric equipment
By designing multiple vents and heat dissipation channels in the battery pack and optimizing the airflow path using fans and heat-conducting plates, the problem of insufficient heat dissipation capacity and balance of the battery pack was solved, achieving efficient and balanced heat dissipation and high energy density.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN GUORUIXIE CHUANG ENERGY STORAGE TECH CO LTD
- Filing Date
- 2025-05-07
- Publication Date
- 2026-05-12
AI Technical Summary
Existing battery packs have poor heat dissipation capacity and heat dissipation uniformity, which affects their working performance.
Multiple ventilation openings and heat dissipation channels are designed in the battery pack. Fans drive airflow through the gaps between battery cells and ventilation openings. Combined with ventilation heat conduction plates and air guides, the airflow path is optimized to form multiple air channels to achieve efficient and balanced heat dissipation.
The heat dissipation capacity of the battery pack and the heat dissipation balance between individual cells have been improved, ensuring higher energy density and longer range within a compact internal space.
Smart Images
Figure CN224232716U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of power battery heat dissipation technology, specifically to a battery pack and electrical equipment. Background Technology
[0002] With the development and increasing popularity of new energy sources, higher and higher requirements are being placed on the performance of power batteries. Power batteries are usually composed of one or more battery packs, each battery pack containing one or more battery modules, and each battery module consisting of multiple battery cells connected in series or parallel.
[0003] The heat dissipation capacity of a battery pack directly affects its performance. Since each battery pack contains a large number of individual cells, this undoubtedly places higher demands on its heat dissipation capacity and heat dissipation balance. However, the heat dissipation capacity and heat dissipation balance of existing battery packs are relatively poor. Utility Model Content
[0004] In view of the above problems, embodiments of this application provide a battery pack and electrical equipment that can improve the heat dissipation capacity of the battery pack and the heat dissipation balance among individual battery cells.
[0005] According to one aspect of the embodiments of this application, a battery pack is provided, including: a housing, a first battery module, a second battery module, and a fan; a first vent is provided at the middle position of one side of the housing along a first direction, and a plurality of second vents and a plurality of third vents are provided on both sides along a second direction, wherein the first direction is perpendicular to the second direction; the first battery module and the second battery module are both disposed in the housing and electrically connected to each other, the first battery module is located between the first vent and the second vent along the second direction, and the second battery module is located between the first vent and the third vent along the second direction; the first battery module includes a plurality of first battery cells arranged along the first direction, the plurality of first battery cells are electrically connected to each other, and adjacent first battery cells are connected to each other. The first battery module has a first gap between the individual battery cells, and the first gap is connected to a second vent in a one-to-one correspondence. The second battery module includes a plurality of second battery cells arranged along a first direction. The plurality of second battery cells are electrically connected to each other. There is a second gap between two adjacent second battery cells, and the second gap is connected to a third vent in a one-to-one correspondence. A heat dissipation channel is formed in the area between the first battery module and the second battery module inside the housing. The heat dissipation channel is connected to the first vent, the first gap, and the second gap, respectively. A fan is provided at the first vent. The fan is used to drive airflow through the second vent, the third vent, the first gap, the second gap, the heat dissipation channel, and the first vent to enter and exit the housing, so as to dissipate heat from the first battery module and the second battery module.
[0006] In one alternative embodiment, a ventilation and heat-conducting plate is disposed in the first gap. The ventilation and heat-conducting plate includes opposing first and second bonding walls, which are respectively bonded to the outer sidewalls facing each other between two adjacent first battery cells. The ventilation and heat-conducting plate also includes a plurality of heat dissipation teeth formed between the first and second bonding walls. The first and second bonding walls are used to absorb heat from the first battery cells and transfer it to the heat dissipation teeth. The plurality of heat dissipation teeth are spaced apart from each other so that a heat exchange channel is formed between the plurality of heat dissipation teeth and the heat dissipation channel. A fan is used to drive airflow through the heat exchange channel and absorb heat from the first bonding wall, the second bonding wall and the heat dissipation teeth.
[0007] In one alternative approach, in the first direction, a duct is provided at a position between the first vent and the first battery module and the second battery module, the duct being used to guide the airflow within the heat dissipation channel.
[0008] In one alternative embodiment, the fan is an exhaust fan; the end of the air guide shroud connected to the heat dissipation channel is the inlet, and the end connected to the first vent is the outlet; the cross-sectional area of the inlet is smaller than the cross-sectional area of the outlet; the air guide shroud is provided with an expansion section between the inlet and the outlet, and the cross-sectional area inside the expansion section gradually increases from the end closer to the inlet to the end closer to the outlet; the fan drives the external airflow to enter the housing from the second vent and the second vent, and enters the heat dissipation channel through the first gap and the second gap, and then flows through the expansion section to reduce the flow rate before being discharged from the first vent.
[0009] In one alternative approach, the cross-sectional area of the inlet is smaller than the cross-sectional area of the heat dissipation channel.
[0010] In one alternative approach, the air deflector is constructed by assembling multiple panels.
[0011] In one alternative embodiment, a first air guide plate is connected between the top of the first battery module and the top of the second battery module, and the top of the air guide shroud is connected to the first air guide plate. The air guide shroud and the first air guide plate cooperate to guide the airflow in the heat dissipation channel.
[0012] In one alternative approach, in the first direction, a second air guide plate is provided at a position between the inner wall of the housing on the side opposite to the first vent and the first battery module and the second battery module. The top of the second air guide plate is connected to the first air guide plate. The air guide shroud, the first air guide plate and the second air guide plate work together to guide the airflow in the heat dissipation channel.
[0013] In one alternative embodiment, the second vent is a strip extending along a third direction, which is perpendicular to both the first and second directions; along the third direction, the size of the first vent is adapted to the size of the first gap.
[0014] According to another aspect of the embodiments of this application, an electrical device is provided, including the battery pack of any of the above.
[0015] In the battery pack provided in this application embodiment, a first vent is formed on one side of the casing along a first direction, and a second vent and a third vent are formed on both sides along a second direction, respectively. A first battery module is disposed between the first and second vents along the second direction, and a second battery module is disposed between the first and third vents along the second direction, thereby forming a heat dissipation channel between the first and second battery modules. The first battery cells in the first battery module and the second battery cells in the second battery module are arranged at intervals along the first direction, such that a first gap corresponding to and communicating with a second vent is formed between adjacent first battery cells, and a second gap corresponding to and communicating with a third vent is formed between adjacent second battery cells. Based on this, the first vent, heat dissipation channel, each first gap, and each second vent form multiple first air ducts for heat dissipation of each first battery cell. The first vent, heat dissipation channel, each second gap, and each third vent form multiple second air ducts for heat dissipation of each second battery cell. Since the heat dissipation channel and the first vent are shared in the first and second air ducts, the internal layout of the battery pack can be more compact, ensuring that the battery pack has a higher energy density within a given volume. A fan located at the first vent drives airflow through these air ducts inside and outside the casing, achieving efficient heat dissipation of each first and second battery cell. Furthermore, the airflow can pass over the sides of each first and second battery cell, resulting in more balanced heat dissipation among the battery cells.
[0016] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description
[0017] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:
[0018] Figure 1 A perspective view of the battery pack provided in an embodiment of this application;
[0019] Figure 2 An exploded view of the battery pack provided in an embodiment of this application;
[0020] Figure 3 A schematic diagram of wind direction from a top-down view of the battery pack provided in an embodiment of this application;
[0021] Figure 4 Exploded views of two adjacent first battery cells provided in this application embodiment;
[0022] Figure 5 A side view of two adjacent first battery cells provided in an embodiment of this application;
[0023] Figure 6 This is an internal structural diagram of the battery pack provided in an embodiment of this application;
[0024] Figure 7 for Figure 3 Enlarged view at point A.
[0025] The reference numerals in the detailed embodiments are as follows:
[0026] 100. Battery pack;
[0027] 110. Housing; 111. First vent; 112. Second vent; 113. Third vent; 114. Heat dissipation channel;
[0028] 120. First battery module; 121. First battery cell; 122. First gap; 123. Ventilation and heat conduction plate; 1231. First bonding wall; 1232. Second bonding wall; 1233. Heat dissipation teeth; 1234. Heat exchange channel;
[0029] 130. Second battery module; 131. Second battery cell; 132. Second gap;
[0030] 140. Fan;
[0031] 150. Air guide shroud; 151. Inlet; 152. Outlet; 153. Expansion section;
[0032] 161. First air guide plate; 162. Second air guide plate. Detailed Implementation
[0033] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.
[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.
[0035] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.
[0036] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0037] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A exists, A and B exist simultaneously, and B exists. In addition, the character " / " in this document generally indicates that the related objects before and after it have an "or" relationship.
[0038] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).
[0039] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.
[0040] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.
[0041] In order to improve the overall heat dissipation performance of the battery pack and the heat dissipation balance among the individual battery cells in the battery pack, this application optimizes the layout of the individual battery cells and air ducts in the battery pack based on air cooling, so as to achieve efficient and balanced heat dissipation while ensuring the compactness of the internal space.
[0042] First, according to one aspect of the embodiments of this application, a battery pack is provided, for details please refer to Figure 1 and Figure 2 , Figure 1 The diagram shows the three-dimensional structure of the battery pack provided in an embodiment of this application. Figure 2 The exploded structure of the battery pack is shown in the figure. As shown, the battery pack 100 includes: a housing 110, a first battery module 120, a second battery module 130, and a fan 140.
[0043] Among them, the housing 110 can be as follows Figure 2 The battery pack 100 shown is constructed by assembling multiple plates, or it can be formed by a single housing and cover plate. The housing 110 can be made of a metal material with good thermal conductivity, so that the battery pack 100 can dissipate some heat through the housing 110. A first vent 111 is provided at the middle position of one side of the housing 110 along the first direction (indicated by the double arrow X in the figure), and multiple second vents 112 and multiple third vents 113 are respectively provided on both sides along the second direction (indicated by the double arrow Y in the figure).
[0044] The first battery module 120 and the second battery module 130 are both disposed within the housing 110 and are electrically connected to each other. The first battery module 120 is located between the first vent 111 and the second vent 112 along the direction indicated by the double arrow Y, and the second battery module 130 is located between the first vent 111 and the third vent 113 along the direction indicated by the double arrow Y.
[0045] The first battery module 120 includes a plurality of first battery cells 121 arranged in the direction indicated by the double arrow X. The plurality of first battery cells 121 are electrically connected to each other, and a first gap 122 is provided between adjacent two first battery cells 121. The first gap 122 is connected to a second vent 112 in a one-to-one correspondence. Similarly, the second battery module 130 includes a plurality of second battery cells 131 arranged in the direction indicated by the double arrow X. The plurality of second battery cells 131 are electrically connected to each other, and a second gap 132 is provided between adjacent two second battery cells 131. The second gap 132 is connected to a third vent 113 in a one-to-one correspondence.
[0046] A heat dissipation channel 114 is formed in the area between the first battery module 120 and the second battery module 130 inside the housing 110. The heat dissipation channel 114 is connected to the first vent 111, the first gap 122 and the second gap 132 respectively.
[0047] Fan 140 is located at the first ventilation opening 111; it can be either an exhaust fan or a draft fan. Figure 2 In the specific embodiment shown, the fan 140 is disposed inside the first vent 111 and mounted on the inner wall of the housing 110 surrounding the first vent 111. In other embodiments, the fan 140 may also be disposed outside the first vent 111 or embedded in the first vent 111.
[0048] For example, please refer to the following: Figure 3 The diagram shows the wind direction from a top-down perspective. The dashed arrows in the diagram represent airflow. External air enters the first gap 122 and the second gap 132 from the second vent 112 and the third vent 113 on both sides, respectively. When the air flows through the first gap 122 and the second gap 132, it absorbs the heat from the first battery cell 121 and the second battery cell 131. Then, the air enters the middle heat dissipation channel 114 from the first gap 122 and the second gap 132 and flows along the heat dissipation channel 114 towards the first vent 111. During the process of flowing through the heat dissipation channel 114, the air continues to absorb the heat from the first battery cell 121 and the second battery cell 131. Finally, the air is exhausted from the first vent 111 by the fan 140. This process continues, thereby achieving efficient and balanced heat dissipation for each of the first battery cells 121 and the second battery cell 131.
[0049] If fan 140 is an exhaust fan, then the airflow direction is the same as... Figure 3 The directions shown are exactly opposite, but the specific heat dissipation principle is the same, so I won't go into details here.
[0050] In summary, in the battery pack 100 provided in this application embodiment, a first ventilation opening 111 is formed on one side of the housing 110 along a first direction, and a second ventilation opening 112 and a third ventilation opening 113 are formed on both sides along a second direction. A first battery module 120 is disposed between the first ventilation opening 111 and the second ventilation opening 112 along the second direction, and a second battery module 130 is disposed between the first ventilation opening 111 and the third ventilation opening 113 along the second direction, so that a heat dissipation channel 114 is formed between the first battery module 120 and the second battery module 130. Each first battery cell 121 in the first battery module 120 and each second battery cell 131 in the second battery module 130 are arranged at intervals along the first direction, so that a first gap 122 corresponding to and communicating with the second ventilation opening 112 is formed between two adjacent first battery cells 121, and a second gap 132 corresponding to and communicating with the third ventilation opening 113 is formed between two adjacent second battery cells 131. Based on this, the first vent 111, heat dissipation channel 114, each first gap 122, and each second vent 112 form multiple first air ducts for heat dissipation of each first battery cell 121, and the first vent 111, heat dissipation channel 114, each second gap 132, and each third vent 113 form multiple second air ducts for heat dissipation of each second battery cell 131. Since the heat dissipation channel 114 and the first vent 111 are shared in the first and second air ducts, the internal layout of the battery pack 100 can be made more compact, ensuring that the battery pack 100 can have a higher energy density within a certain volume. By driving the airflow through these air ducts via a fan 140 located at the first vent 111, the airflow is made to flow inside and outside the housing 110, achieving efficient heat dissipation of each first battery cell 121 and second battery cell 131. Furthermore, the airflow can flow through the sides of each first battery cell 121 and second battery cell 131, which makes the heat dissipation between the battery cells more balanced.
[0051] To further improve the heat dissipation of the battery cells, this application proposes an implementation method, which can be found in the following details. Figure 4 and Figure 5 The figure shows the explosion structure at two adjacent first battery cells 121. Figure 5 The figure shows a side view of two adjacent first battery cells 121. As shown, a ventilation and heat-conducting plate 123 is disposed in the first gap 122. The ventilation and heat-conducting plate 123 includes a first bonding wall 1231 and a second bonding wall 1232 facing each other. The first bonding wall 1231 and the second bonding wall 1232 are respectively bonded to the outer side walls facing each other between the two adjacent first battery cells 121. In addition, the ventilation and heat-conducting plate 123 also includes a plurality of heat dissipation teeth 1233 formed between the first bonding wall 1231 and the second bonding wall 1232.
[0052] With this configuration, the heat generated by the two adjacent first battery cells 121 will first be transferred to the first bonding wall 1231 and the second bonding wall 1232, and then the heat on the first bonding wall 1231 and the second bonding wall 1232 will be transferred to the heat dissipation teeth 1233.
[0053] Multiple heat dissipation fins 1233 are spaced apart to form a heat exchange channel 1234 connecting the second vent 112 and the heat dissipation channel 114. In other words, the heat dissipation fins 1233 divide the first gap 122 into multiple heat exchange channels 1234. This allows the air driven by the fan 140 to simultaneously contact and absorb heat from the first bonding wall 1231, the second bonding wall 1232, and the heat dissipation fins 1233 when the air passes through the heat exchange channel 1234. Compared to the air directly contacting the sidewall of the first battery cell 121 for heat absorption, this effectively increases the air contact area, thereby improving heat dissipation efficiency.
[0054] It is understandable that the ventilation and heat conduction plate 123 can be set in the second gap 132 in the same way, and the principle of improving heat dissipation efficiency is the same, so it will not be elaborated further.
[0055] To ensure airflow follows the intended path for optimal heat dissipation, please refer to [the relevant documentation / reference]. Figure 2 and further combine Figure 6 , Figure 6 The internal structure of the battery pack 100 is shown in the figure. In the direction indicated by the double arrow X, a guide shroud 150 is provided between the first vent 111 and the first battery module 120 and the second battery module 130. The guide shroud 150 is used to guide the airflow in the heat dissipation channel 114 so that the airflow can flow accurately between the heat dissipation channel 114 and the first vent 111, thereby ensuring the stability of the airflow velocity and providing a guarantee for efficient heat dissipation.
[0056] Based on this, in order to reduce noise, such as Figure 2 and Figure 3 As shown, fan 140 is an exhaust fan, used to drive air within the heat dissipation channel 114 to be exhausted from the first vent 111. (See also...) Figure 7 Shown Figure 3 In the enlarged structure at point A, the inlet 151 of the air guide shroud 150 connects to the heat dissipation channel 114, and the outlet 152 connects to the first vent 111. The cross-sectional area of the inlet 151 is smaller than the cross-sectional area of the outlet 152. This can also be equated to... Figure 7The width L1 at the inlet 151 is smaller than the width L2 at the outlet 152. The air guide shroud 150 has an expansion section 153 between the inlet 151 and the outlet 152. The cross-sectional area of the expansion section 153 gradually increases from the end closer to the inlet 151 to the end closer to the outlet 152, which reduces the airflow velocity after passing through the expansion section 153. On the one hand, this avoids a strong collision between the discharged dynamic air velocity and the original static air outside, which would generate significant noise. On the other hand, it prevents the discharged airflow velocity from suddenly expanding outside the first vent 111, forming a low-pressure vortex, and causing hot air to be drawn back.
[0057] Furthermore, in order to ensure airflow speed, such as Figure 7 As shown, the cross-sectional area of the inlet 151 is smaller than that of the heat dissipation channel 114. This can also be equated to the width L1 of the inlet 151 being smaller than the width L3 of the heat dissipation channel 114. This arrangement increases the airflow velocity when the air enters the inlet 151 from the heat dissipation channel 114, thereby accelerating the airflow velocity in the first gap 122, the second gap 132, and the heat dissipation channel 114 to a certain extent, ensuring heat dissipation efficiency.
[0058] Considering that the design of the expansion section 153 results in an irregular shape for the air guide shroud 150, which increases the difficulty of manufacturing the air guide shroud 150, the following measures are taken to facilitate its production: Figure 2 As shown, the air guide shroud 150 can be assembled from multiple plates. Each plate can be set to a relatively simple shape to reduce the processing difficulty. The air guide shroud 150 can ultimately be formed by bending and assembling multiple plates.
[0059] To ensure the accuracy of airflow direction in heat dissipation channel 114, such as Figure 2 As shown, a first air guide plate 161 can be connected between the top of the first battery module 120 and the top of the second battery module 130. The top of the air guide shroud 150 is connected to the first air guide plate 161. The air guide shroud 150 and the first air guide plate 161 cooperate to guide the airflow in the heat dissipation channel 114. Specifically, by covering the top of the heat dissipation channel 114 with the first air guide plate 161, the airflow in the heat dissipation channel 114 can be prevented from flowing upward and affecting the heat dissipation efficiency. By connecting the top of the air guide shroud 150 to the first air guide plate 161, the stability of the air guide shroud 150 can be ensured, and the airflow can flow better between the inside of the first air guide plate 161 and the inside of the air guide shroud 150, thereby ensuring the air-cooling performance of the battery pack 100.
[0060] Furthermore, such as Figure 2As shown, a second air guide plate 162 can be provided at the position between the inner wall of the housing 110 away from the first vent 111 and the first battery module 120 and the second battery module 130. The top of the second air guide plate 162 is also connected to the first air guide plate 161. The air guide shroud 150, the first air guide plate 161 and the second air guide plate 162 work together to guide the airflow in the heat dissipation channel 114. Specifically, the air guide shroud 150, the first air guide plate 161, the second air guide plate 162, the side wall of the first battery module 120 facing the heat dissipation channel 114, the side wall of the second battery module 130 facing the heat dissipation channel 114 and the bottom wall of the housing 110 together form a heat dissipation channel 114 that extends to the first vent 111 in the direction indicated by the double arrow X and has good sealing properties. This allows for good guidance of the airflow in the heat dissipation channel 114 to ensure the accuracy of the airflow direction and guarantee heat dissipation efficiency.
[0061] Similarly, considering that the second air guide plate 162 needs to block the end of the heat dissipation channel 114 away from the first vent 111, the shape of the second air guide plate 162 is also relatively complex. In order to better process and manufacture, such as Figure 2 As shown, the second air guide plate 162 can also be formed by assembling multiple plates.
[0062] To maximize airflow and ensure heat dissipation while maintaining a compact layout, such as Figure 6 As shown, the second vent 112 is a strip extending in a third direction (in the direction indicated by the double arrow Z in the figure). The size of the second vent 112 is adapted to the size of the first gap 122 in the direction indicated by the double arrow Z. It should be noted that the adaptation here does not mean that the size of the second vent 112 and the first gap 122 in the direction indicated by the double arrow Z must be exactly equal. Rather, the size of the two can be exactly equal or within a certain range of difference, as long as it ensures that there is a large airflow that flows smoothly between the outside, the second vent 112 and the first gap 122.
[0063] According to another aspect of the embodiments of this application, an electrical device is also provided, which includes the battery pack 100 in any of the above embodiments. Specifically, the electrical device may be an electric vehicle, a robot, a drone, etc., and is not limited here.
[0064] The electrical device provided in this application embodiment, by adopting the battery pack 100 in the above embodiment, can have a longer battery life and battery heat dissipation capability while ensuring that the electrical device has a small size.
[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way.
Claims
1. A battery pack, characterized in that, include: The casing, the first battery module, the second battery module, and the fan; The housing has a first ventilation opening at the middle position on one side along the first direction, and multiple second ventilation openings and multiple third ventilation openings on both sides along the second direction, wherein the first direction is perpendicular to the second direction; The first battery module and the second battery module are both disposed inside the housing and are electrically connected to each other. The first battery module is located between the first vent and the second vent along the second direction, and the second battery module is located between the first vent and the third vent along the second direction. The first battery module includes a plurality of first battery cells arranged along the first direction. The plurality of first battery cells are electrically connected to each other. There is a first gap between two adjacent first battery cells. The first gap is connected to the second vent in a one-to-one correspondence. The second battery module includes a plurality of second battery cells arranged along the first direction. The plurality of second battery cells are electrically connected to each other. There is a second gap between two adjacent second battery cells. The second gap is connected to the third vent in a one-to-one correspondence. A heat dissipation channel is formed in the area between the first battery module and the second battery module inside the housing. The heat dissipation channel is connected to the first vent, the first gap and the second gap respectively. The fan is located at the first vent, and the fan is used to drive airflow through the second vent, the third vent, the first gap, the second gap, the heat dissipation channel and the first vent to enter and exit the housing, so as to dissipate heat from the first battery module and the second battery module.
2. The battery pack according to claim 1, characterized in that, A ventilation and heat-conducting plate is provided in the first gap. The ventilation and heat-conducting plate includes a first bonding wall and a second bonding wall that are opposite to each other. The first bonding wall and the second bonding wall are respectively bonded to the outer side walls facing each other between two adjacent first battery cells. The ventilation and heat-conducting plate also includes a plurality of heat dissipation teeth formed between the first bonding wall and the second bonding wall; The first and second bonding walls are used to absorb the heat of the first battery cell and transfer it to the heat dissipation teeth; The plurality of heat dissipation teeth are spaced apart from each other to form a heat exchange channel between the plurality of heat dissipation teeth and the heat dissipation channel. The fan is used to drive airflow through the heat exchange channel and absorb heat from the first bonding wall, the second bonding wall and the heat dissipation teeth.
3. The battery pack according to claim 1, characterized in that, In the first direction, a wind guide shroud is provided at the position between the first vent and the first battery module and the second battery module, and the wind guide shroud is used to guide the airflow in the heat dissipation channel.
4. The battery pack according to claim 3, characterized in that, The fan is an exhaust fan; The end of the air guide shroud that is connected to the heat dissipation channel is the inlet, and the end that is connected to the first vent is the outlet; The cross-sectional area of the inlet is smaller than the cross-sectional area of the outlet; The air guide shroud has an expansion section between the inlet and the outlet. The cross-sectional area inside the expansion section gradually increases from the end closer to the inlet to the end closer to the outlet. The fan drives the external airflow to enter the housing from the second vent and the second vent, and then enters the heat dissipation channel through the first gap and the second gap. After flowing through the expansion section to reduce the flow rate, it is discharged from the first vent.
5. The battery pack according to claim 4, characterized in that, The cross-sectional area of the inlet is smaller than the cross-sectional area of the heat dissipation channel.
6. The battery pack according to claim 4, characterized in that, The air guide cover is composed of multiple panels assembled together.
7. The battery pack according to claim 3, characterized in that, A first air guide plate is connected between the top of the first battery module and the top of the second battery module. The top of the air guide shroud is connected to the first air guide plate. The air guide shroud and the first air guide plate cooperate to guide the airflow in the heat dissipation channel.
8. The battery pack according to claim 7, characterized in that, In the first direction, a second air guide plate is provided on the inner wall of the housing opposite to the first vent, between the first battery module and the second battery module. The top of the second air guide plate is connected to the first air guide plate. The air guide shroud, the first air guide plate and the second air guide plate work together to guide the airflow in the heat dissipation channel.
9. The battery pack according to any one of claims 1-8, characterized in that, The second ventilation opening is a strip extending along a third direction, which is perpendicular to both the first and second directions; Along the third direction, the size of the first vent is adapted to the size of the first gap.
10. An electrical appliance, characterized in that, The battery pack includes any one of claims 1-9.