Battery pack and powered device

Abstract

The utility model relates to battery technology field discloses a kind of battery pack and electrical equipment, and battery pack includes liquid cooling plate and frame;Frame includes two first side beam, second side beam and third side beam;Liquid cooling plate is connected to the side of frame along third direction, and inside hollow forms cooling flow channel;Second side beam includes side beam body and flow channel part, and first flow channel and second flow channel are formed inside hollow in flow channel part;Flow channel part side towards liquid cooling plate is equipped with first through-hole and second through-hole;Liquid cooling plate side towards flow channel part is equipped with first communication end and second communication end;Along third direction, first communication end is arranged in first through-hole, and second communication end is arranged in second through-hole.The battery pack provided by the utility model reduces the risk of interface water leakage, and simplifies the pipeline structure of liquid cooling system.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a battery pack and an electrical device. Background Technology

[0002] The battery pack is the "heart" of an electric vehicle, providing power to pure electric vehicles, hybrid vehicles, and other new energy transportation tools. Ensuring its proper functioning is crucial. However, the battery pack generates heat and its temperature rises during charging and discharging. Therefore, a liquid cooling system has become an important component of the battery pack. Existing battery pack under-pack cooling systems have multiple water pipe connections inside the pack housing, which can lead to problems such as leaks at the joints and complex piping. Utility Model Content

[0003] In view of this, the present invention provides a battery pack and electrical equipment to solve the problems of water leakage at the interface of the cooling system of the lower casing of the existing battery pack and the complexity of the piping.

[0004] In a first aspect, the present invention provides a battery pack having a first direction, a second direction and a third direction that are perpendicular to each other, including: a liquid cooling plate and a frame;

[0005] The frame includes two first side beams arranged opposite each other along a first direction, and a second side beam and a third side beam arranged opposite each other along a second direction;

[0006] The liquid cooling plate is connected to one side of the frame along the third direction, and its hollow interior forms a cooling channel. The two first side beams, the second side beam, the third side beam, and the liquid cooling plate together enclose and form a housing space.

[0007] The second side beam includes a side beam body and a flow channel portion extending from the side beam body into the receiving space. The flow channel portion is hollow inside to form a first flow channel and a second flow channel extending in a second direction. The side of the flow channel portion facing the liquid cooling plate is provided with a first through hole communicating with the first flow channel and a second through hole communicating with the second flow channel.

[0008] The liquid cooling plate has a first connecting end and a second connecting end on the side facing the flow channel, which are connected to the cooling flow channel; along the third direction, the first connecting end passes through the first through hole, and the second connecting end passes through the second through hole.

[0009] Beneficial effects: The battery pack provided by this utility model has a flow channel on the second side beam, and a first through hole and a second through hole on the side of the flow channel facing the liquid cooling plate. At the same time, a first connecting end and a second connecting end are provided on the liquid cooling plate. During assembly, the first connecting end passes through the first through hole, and the second connecting end passes through the second through hole. Then, the first connecting end and the second connecting end are welded to the flow channel, thereby connecting the cooling flow channel with the first flow channel and the second flow channel through the first connecting end and the second connecting end. This makes the liquid cooling plate and the second side beam form an integrated structure, and thus integrates the liquid cooling system into the battery pack housing. This eliminates the need for external water pipes and water pipe joints inside the battery pack housing, which not only reduces the safety risk caused by coolant leakage into the housing, but also greatly simplifies the piping structure of the liquid cooling system inside the battery pack housing.

[0010] In one optional embodiment, the side beam body is provided with an inlet and an outlet on the side away from the liquid cooling plate along the second direction. The inlet is connected to the first flow channel, and the outlet is connected to the second flow channel.

[0011] Beneficial effects: By setting the inlet and outlet on the same side of the side beam, when the inlet and outlet are connected to the outside, the external water pipes can be concentrated in one place, thereby reducing the length of the external water pipes to the water pump.

[0012] In one optional embodiment, the side beam body has a third flow channel and a fourth flow channel inside. One end of the third flow channel is connected to the liquid inlet and the other end is connected to the first flow channel. One end of the fourth flow channel is connected to the liquid outlet and the other end is connected to the second flow channel.

[0013] The flow channel section also includes a partition section; partition sections are provided between the first flow channel and the second flow channel, and between the third flow channel and the fourth flow channel for isolation.

[0014] Beneficial effects: By providing partitions between the first and second flow channels and between the third and fourth flow channels to isolate them, the first and second flow channels are set independently, and the third and fourth flow channels are set independently, which reduces the heat exchange of the coolant before and after cooling and ensures the cooling effect of the cooling system.

[0015] In one optional embodiment, the cooling channel includes a first cooling unit, a second cooling unit, and a converging flow path. The first cooling unit and the second cooling unit are independently arranged, and the converging flow path is connected to the first cooling unit and the second cooling unit.

[0016] The first cooling unit includes at least a first flow path and a second flow path extending along the second direction. One end of the first flow path and the second flow path near the flow channel portion along the second direction are both connected to the first flow channel, and the other end of both are connected to the converging flow path.

[0017] The second cooling unit includes at least a third flow path and a fourth flow path extending along the second direction. One end of the third flow path and the fourth flow path near the flow channel in the second direction are connected to the second flow channel, and the other end of the third flow path and the fourth flow path are connected to the collecting flow path.

[0018] Beneficial effects: During the cooling process, the coolant enters from the inlet, flows through the third and first channels, enters the cooling channel through the first connecting end, flows through the first and second channels, and converges at the tail of the battery pack housing. It then flows into the third and fourth channels through the converging channel, flows through the second and fourth channels through the second connecting end, and finally flows out from the outlet. The coolant enters through the first connecting end and simultaneously through at least the first and second channels, and then flows out after converging through the converging channel, which can reduce flow resistance. At the same time, the multiple parallel channel structure can make the cell temperature more uniform.

[0019] In one optional embodiment, the liquid cooling plate includes a flow channel bottom plate and a flow channel cover, the flow channel cover being disposed on the side of the flow channel bottom plate in a third direction near the flow channel portion, the flow channel cover and the flow channel bottom plate together forming a cooling flow channel;

[0020] The flow channel cover is provided with a first connecting end and a second connecting end extending in a third direction.

[0021] Beneficial effects: By setting a first connecting end and a second connecting end extending in a third direction on the flow channel cover, during the assembly process, the first connecting end can be inserted into the first through hole, and the second connecting end can be inserted into the second through hole. Then, the first connecting end and the second connecting end are welded to the flow channel, thereby making the liquid cooling plate and the second side beam form an integrated structure. This integrates the liquid cooling system into the battery pack housing, so that there are no external water pipes or water pipe joints inside the entire battery pack housing. This not only reduces the safety risk caused by coolant leakage into the housing, but also greatly simplifies the piping structure of the liquid cooling system inside the battery pack housing.

[0022] In one optional embodiment, the flow channel includes a base and a first cover and a second cover. The base has a first groove and a second groove that are independently formed. The bottom wall of the first groove has a first through hole and the bottom wall of the second groove has a second through hole. A first connecting end passes through the first through hole and is welded to the bottom wall of the first groove, and a second connecting end passes through the second through hole and is welded to the bottom wall of the second groove.

[0023] Both the first cover and the second cover are welded to the base. The first cover is used to seal the first groove to form the first flow channel, and the second cover is used to seal the second groove to form the second flow channel.

[0024] Beneficial effects: By setting a base and a first cover and a second cover, and setting a first groove and a second groove, as well as a first through hole and a second through hole on the base, during the assembly process, since the first groove and the second groove are both open, operation space is reserved for welding between the first connecting end and the bottom wall of the first groove and between the second connecting end and the bottom wall of the second groove. After the welding is completed, the first cover and the second cover are welded to the base, thereby forming a first flow channel by sealing the first groove with the first cover and forming a second flow channel by sealing the second groove with the second cover, so that the liquid cooling plate and the second side beam form an integrated structure, thereby integrating the liquid cooling system on the battery pack housing.

[0025] In one alternative embodiment, the base is further provided with a third groove and a fourth groove; the first cover body is placed in the third groove, and the second cover body is placed in the fourth groove.

[0026] Beneficial effects: By setting the third and fourth grooves on the base, it is convenient to position the first cover through the third groove and the second cover through the fourth groove during the assembly process, which helps to ensure the welding yield and sealing of the first and second covers with the base.

[0027] In one optional embodiment, the second side beam further includes a mounting portion, which extends from the side beam body along a second direction toward the direction close to the liquid cooling plate. The mounting portion is connected to both sides of the flow channel portion along a first direction. The side of the mounting portion away from the side beam body along the second direction is connected to the liquid cooling plate. The side of the mounting portion away from the flow channel portion along the first direction is connected to the first side beam.

[0028] Beneficial effects: When processing the second side beam, the entire structure of the second side beam, including the side beam body, the flow channel, and the mounting part, can be formed in one process. During assembly, the flow channel and the mounting part can be integrated with the liquid cooling plate, reducing the size of the liquid cooling plate along the second direction and optimizing the space utilization inside the battery pack.

[0029] In one alternative embodiment, the mounting part is provided with a reinforcing rib and a fixing part on one side along the third direction, the fixing part is connected to the reinforcing rib, and the fixing part is used to install and fix components.

[0030] Beneficial effects: The second side beam can be formed with reinforcing ribs and fixing parts in one piece. The fixing parts can be used to install components such as BDU and BMS, thereby reducing the additional manual welding process of the battery pack box. In addition, the reinforcing ribs can improve the overall structural strength of the second side beam.

[0031] Secondly, this utility model also provides an electrical device, including the battery pack described above.

[0032] Beneficial effects: The electrical equipment provided by this utility model, by adopting the above-mentioned battery pack, can integrate the liquid cooling system into the battery pack housing, so that there are no external water pipes or water pipe joints connected inside the entire battery pack housing. This not only reduces the safety risk caused by coolant leakage into the housing, but also greatly simplifies the piping structure of the liquid cooling system inside the battery pack housing; it can also reduce flow resistance, and the multiple parallel flow channel structure can make the cell temperature more uniform; in addition, it can also reduce additional manual welding processes such as battery pack housing. Attached Figure Description

[0033] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0034] Figure 1 This is a perspective view of a battery pack housing according to an embodiment of the present utility model;

[0035] Figure 2 for Figure 1 The top view of the battery pack housing shown;

[0036] Figure 3 for Figure 2 Sectional view of section AA;

[0037] Figure 4 for Figure 3 Sectional view of section BB;

[0038] Figure 5 for Figure 3 A magnified view of a portion of point C in the middle;

[0039] Figure 6 for Figure 2 The top view of the battery pack housing after the concealed flow channel cover is shown.

[0040] Figure 7 This is a perspective view of the second side beam of a battery pack housing according to an embodiment of the present utility model;

[0041] Figure 8 This is a perspective view of the second side beam of a battery pack housing according to an embodiment of the present invention, after the first cover and the second cover are hidden.

[0042] Figure 9 This is an exploded view of the liquid cooling plate of a battery pack housing according to an embodiment of the present invention.

[0043] Explanation of reference numerals in the attached figures:

[0044] 10. Liquid cooling plate;

[0045] 100. Cooling channel; 101. First cooling unit; 102. Second cooling unit; 103. Converging flow path;

[0046] 11. Flow channel bottom plate; 111. First flow path; 112. Second flow path; 113. Third flow path; 114. Fourth flow path;

[0047] 12. Flow channel cover; 121. First connecting end; 122. Second connecting end;

[0048] 20. Frame; 201. First side beam; 202. Second side beam; 203. Third side beam;

[0049] 21. Side beam body; 211. Liquid inlet; 212. Liquid outlet; 213. Third flow channel; 214. Fourth flow channel;

[0050] 22. Flow channel section; 2201. First flow channel; 2202. Second flow channel; 2203. First through hole; 2204. Second through hole; 221. Base; 2211. First groove; 2212. Second groove; 2213. Third groove; 2214. Fourth groove; 222. First cover; 223. Second cover; 224. Partition section;

[0051] 23. Mounting part; 231. Reinforcing rib; 232. Fixing part;

[0052] X—first direction; Y—second direction; Z—third direction. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0054] The following is combined Figures 1 to 9 The following describes embodiments of the present invention.

[0055] According to an embodiment of the present invention, a battery pack is provided, having a first direction X, a second direction Y and a third direction Z that are perpendicular to each other, including: a liquid cooling plate 10 and a frame 20;

[0056] Please see Figure 4As shown, the frame 20 includes two first side beams 201, a second side beam 202, and a third side beam 203; the two first side beams 201 are arranged opposite each other along a first direction X, and the second side beam 202 and the third side beam 203 are arranged opposite each other along a second direction Y.

[0057] Please see Figure 1 As shown, the liquid cooling plate 10 is connected to one side of the frame 20 along the third direction Z; please refer to Figure 5 As shown, the interior of the liquid cooling plate 10 is hollow to form a cooling channel 100, and the two first side beams 201, the second side beam 202, the third side beam 203, and the liquid cooling plate 10 together enclose and form an accommodating space.

[0058] Please see Figure 2 As shown, the second side beam 202 includes a side beam body 21 and a flow channel portion 22 extending from the side beam body 21 in the second direction Y toward the interior of the frame 20; it can be understood that since the flow channel portion 22 extends from the side beam body 21 in the second direction Y toward the accommodating space, the orthogonal projection of the flow channel portion 22 in the third direction Z at least partially covers the liquid cooling plate 10; please refer to Figure 4 As shown, the interior of the flow channel section 22 is hollow, forming a first flow channel 2201 and a second flow channel 2202 extending along the second direction Y; please refer to Figure 8 As shown, the flow channel 22 has a first through hole 2203 communicating with the first flow channel 2201 and a second through hole 2204 communicating with the second flow channel 2202 on the side facing the liquid cooling plate 10.

[0059] Please see Figure 9 As shown, the liquid cooling plate 10 has a first connecting end 121 and a second connecting end 122 on the side facing the flow channel portion 22, which are connected to the cooling flow channel 100; please refer to the diagram. Figure 4 and Figure 5 As shown, along the third direction Z, the first connecting end 121 passes through the first through hole 2203, and the second connecting end 122 passes through the second through hole 2204.

[0060] The battery pack provided by this utility model features a flow channel 22 on the second side beam 202, with a first through hole 2203 and a second through hole 2204 on the side of the flow channel 22 facing the liquid cooling plate 10. A first connecting end 121 and a second connecting end 122 are also provided on the liquid cooling plate 10. During assembly, the first connecting end 121 passes through the first through hole 2203, and the second connecting end 122 passes through the second through hole 2204. Then, the first connecting end 121 and the second connecting end 122 are connected... The cooling channel 100 is welded to the flow channel 22, thereby connecting the cooling flow channel 100 with the first flow channel 2201 and the second flow channel 2202 through the first connecting end 121 and the second connecting end 122, so that the liquid cooling plate 10 and the second side beam 202 form an integrated structure, thereby integrating the liquid cooling system into the battery pack housing, so that there are no external water pipes and water pipe joints connected inside the entire battery pack housing, which not only reduces the safety risk caused by coolant leakage into the housing, but also greatly simplifies the piping structure of the liquid cooling system inside the battery pack housing.

[0061] In some embodiments, see Figure 7 As shown, the side beam body 21 and the flow channel 22 are integrally formed structures; the side beam body 21 is provided with an inlet 211 and an outlet 212 on the side away from the liquid cooling plate 10 along the second direction Y. The inlet 211 is connected to the first flow channel 2201, and the outlet 212 is connected to the second flow channel 2202.

[0062] Furthermore, the liquid inlet 211 and the liquid outlet 212 are welded to the side beam body 21.

[0063] By setting the inlet 211 and outlet 212 on the same side of the side beam body 21, when the inlet 211 and outlet 212 are connected to the outside, the external water pipes can be concentrated in one place, thereby reducing the length of the external water pipes to the water pump.

[0064] In some embodiments, please combine Figure 4 and Figure 5 As shown, the side beam body 21 has a third flow channel 213 and a fourth flow channel 214 inside. One end of the third flow channel 213 is connected to the liquid inlet 211 and the other end is connected to the first flow channel 2201. One end of the fourth flow channel 214 is connected to the liquid outlet 212 and the other end is connected to the second flow channel 2202.

[0065] The flow channel section 22 also includes a partition section 224; the partition section 224 is provided between the first flow channel 2201 and the second flow channel 2202 and between the third flow channel 213 and the fourth flow channel 214 for isolation.

[0066] By providing partitions 224 between the first flow channel 2201 and the second flow channel 2202, and between the third flow channel 213 and the fourth flow channel 214, the first flow channel 2201 and the second flow channel 2202 are set independently of each other, and the third flow channel 213 and the fourth flow channel 214 are set independently of each other. This reduces the heat exchange of the coolant before and after cooling and ensures the cooling effect of the cooling system.

[0067] In some embodiments, see Figure 6 As shown, the cooling channel 100 includes a first cooling unit 101, a second cooling unit 102, and a converging flow path 103. The first cooling unit 101 and the second cooling unit 102 are independently arranged. The converging flow path 103 is connected to the first cooling unit 101 and the second cooling unit 102. The converging flow path 103 is located at the rear of the battery pack housing.

[0068] The first cooling unit 101 includes at least a first flow path 111 and a second flow path 112 extending along the second direction Y. The first flow path 111 and the second flow path 112 are connected in parallel. One end of the first flow path 111 and the second flow path 112 along the second direction Y near the flow channel portion 22 is connected to the first flow channel 2201, and the other end is connected to the converging flow path 103.

[0069] The second cooling unit 102 includes at least a third flow path 113 and a fourth flow path 114 extending along the second direction Y. The third flow path 113 and the fourth flow path 114 are connected in parallel. One end of the third flow path 113 and the fourth flow path 114 along the second direction Y near the flow channel 22 is connected to the second flow channel 2202, and the other end is connected to the collecting flow path 103.

[0070] During the cooling process, the coolant enters from the inlet 211, passes through the third flow channel 213 and the first flow channel 2201, enters the cooling flow channel 100 through the first connecting end 121, flows through the first flow path 111 and the second flow path 112, and converges at the tail of the battery pack housing. It then flows into the third flow path 113 and the fourth flow path 114 through the converging flow path 103, then flows through the second flow channel 2202 and the fourth flow path 214 through the second connecting end 122, and finally flows out from the outlet 212. The coolant enters through the first connecting end 121 and simultaneously through at least the first flow path 111 and the second flow path 112, and then flows out after converging through the converging flow path 103, which can reduce flow resistance. At the same time, the multiple parallel flow channel structure can make the cell temperature more uniform.

[0071] In some embodiments, see Figure 9 As shown, the liquid cooling plate 10 includes a flow channel bottom plate 11 and a flow channel cover 12. The flow channel cover 12 is disposed on the side of the flow channel bottom plate 11 that is close to the flow channel portion 22 along the third direction Z. The flow channel cover 12 and the flow channel bottom plate 11 together form a cooling flow channel 100.

[0072] The flow channel cover 12 is provided with a first connecting end 121 and a second connecting end 122 extending in the third direction Z.

[0073] Furthermore, the flow channel cover 12 is welded to the flow channel base plate 11.

[0074] By providing a first connecting end 121 and a second connecting end 122 extending in the third direction Z on the flow channel cover 12, during the assembly process, the first connecting end 121 can be inserted into the first through hole 2203, and the second connecting end 122 can be inserted into the second through hole 2204. Then, the first connecting end 121 and the second connecting end 122 are welded to the flow channel part 22, thereby making the liquid cooling plate 10 and the second side beam 202 form an integrated structure, and thus integrating the liquid cooling system into the battery pack housing. This eliminates the need for external water pipes and water pipe joints inside the entire battery pack housing, which not only reduces the safety risk caused by coolant leakage into the housing, but also greatly simplifies the piping structure of the liquid cooling system inside the battery pack housing.

[0075] Furthermore, a support rib (not shown) can be provided between the flow channel cover 12 and the flow channel bottom plate 11. The support rib is located within the first flow path 111, the second flow path 112, the third flow path 113 and / or the fourth flow path 114, thereby ensuring the overall structural strength of the liquid cooling plate 10 and the battery pack housing while ensuring the width, depth and / or cross-sectional area of ​​the flow path.

[0076] In some embodiments, see Figure 7 As shown, the flow channel section 22 includes a base 221, a first cover 222, and a second cover 223. Please refer to [link / reference]. Figure 8 As shown, a first groove 2211 and a second groove 2212, which are independently formed, are provided on the base 221. A first through hole 2203 is formed on the bottom wall of the first groove 2211, and a second through hole 2204 is formed on the bottom wall of the second groove 2212. During assembly, please assemble them together. Figure 4 and Figure 5 As shown, the first connecting end 121 passes through the first through hole 2203 and is welded to the bottom wall of the first groove 2211, and the second connecting end 122 passes through the second through hole 2204 and is welded to the bottom wall of the second groove 2212.

[0077] The first cover 222 and the second cover 223 are both welded to the base 221. The first cover 222 is used to cover the first groove 2211 to form the first flow channel 2201, and the second cover 223 is used to cover the second groove 2212 to form the second flow channel 2202.

[0078] By setting a base 221 and a first cover 222 and a second cover 223, and setting a first groove 2211 and a second groove 2212, as well as a first through hole 2203 and a second through hole 2204 on the base 221, during the assembly process, since the first groove 2211 and the second groove 2212 are both open, operation space is reserved for welding between the first connecting end 121 and the bottom wall of the first groove 2211 and between the second connecting end 122 and the bottom wall of the second groove 2212. After the welding is completed, the first cover 222 and the second cover 223 are welded to the base 221, thereby forming a first flow channel 2201 by sealing the first groove 2211 with the first cover 222, and forming a second flow channel 2202 by sealing the second groove 2212 with the second cover 223, so that the liquid cooling plate 10 and the second side beam 202 form an integrated structure, thereby integrating the liquid cooling system on the battery pack housing.

[0079] In some embodiments, see Figure 8 As shown, the base 221 is also provided with a third groove 2213 and a fourth groove 2214; the first cover 222 is built into the third groove 2213 and the second cover 223 is built into the fourth groove 2214.

[0080] By providing a third groove 2213 and a fourth groove 2214 on the base 221, it is convenient to position the first cover 222 through the third groove 2213 and the second cover 223 through the fourth groove 2214 during the assembly process. This helps to ensure the welding yield and sealing performance between the first cover 222 and the second cover 223 and the base 221.

[0081] In some embodiments, please combine Figure 2 and Figure 7 As shown, the second side beam 202 also includes a mounting part 23, which is formed by the side beam body 21 extending along the second direction Y toward the direction close to the liquid cooling plate 10. The mounting part 23 is connected to both sides of the flow channel part 22 along the first direction X. The side of the mounting part 23 away from the side beam body 21 along the second direction Y is connected to the liquid cooling plate 10. The side beam body 21, the flow channel part 22 and the mounting part 23 are integrally formed. The side of the mounting part 23 away from the flow channel part 22 along the first direction X is connected to the first side beam 201.

[0082] Furthermore, the mounting part 23 is welded to the first side beam 201 on the side away from the flow channel part 22 along the first direction X; the mounting part 23 is welded to the liquid cooling plate 10 on the side away from the side beam body 21 along the second direction Y.

[0083] When processing the second side beam 202, the second side beam 202 integral structure, including the side beam body 21, the flow channel 22 and the mounting part 23, can be formed in one process. During the assembly process, the flow channel 22 and the mounting part 23 can be integrated with the liquid cooling plate 10, which reduces the size of the liquid cooling plate 10 along the second direction Y and optimizes the space utilization inside the battery pack.

[0084] In some embodiments, please combine Figure 2 and Figure 7 As shown, the mounting part 23 is provided with a reinforcing rib 231 and a fixing part 232 on one side along the third direction Z. The fixing part 232 is connected to the reinforcing rib 231 and is used to install and fix components.

[0085] The second side beam 202 can be formed in one piece with reinforcing ribs 231 and fixing parts 232. The fixing parts 232 can be used to install components such as BDU and BMS, thereby reducing the additional manual welding process of the battery pack box. In addition, the reinforcing ribs 231 can improve the overall structural strength of the second side beam 202.

[0086] According to an embodiment of the present invention, another aspect provides an electrical device including the battery pack described above.

[0087] Furthermore, the liquid cooling plate 10 and the frame 20 together enclose a receiving compartment (not shown in the figure), and the battery cell is built into the receiving compartment.

[0088] The electrical equipment provided by this utility model, by adopting the aforementioned battery pack, can integrate the liquid cooling system into the battery pack housing, eliminating the need for external water pipes and pipe joints inside the battery pack housing. This not only reduces the safety risk caused by coolant leakage into the housing but also greatly simplifies the piping structure of the liquid cooling system inside the battery pack housing. It also reduces flow resistance, and the multiple parallel flow channels ensure more even cell temperatures. Furthermore, it reduces additional manual welding processes for the battery pack housing.

[0089] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A battery pack having a first direction (X), a second direction (Y), and a third direction (Z) perpendicular to each other two by two, characterized in that, include: Liquid cooling plate (10) and frame (20); The frame (20) includes two first side beams (201) arranged opposite each other along the first direction (X) and a second side beam (202) and a third side beam (203) arranged opposite each other along the second direction (Y); The liquid cooling plate (10) is connected to one side of the frame (20) along the third direction (Z), and has a hollow interior forming a cooling channel (100). The two first side beams (201), the second side beam (202), the third side beam (203), and the liquid cooling plate (10) together enclose and form an accommodating space. The second side beam (202) includes a side beam body (21) and a flow channel portion (22) extending from the side beam body (21) into the accommodating space; the flow channel portion (22) is hollow inside to form a first flow channel (2201) and a second flow channel (2202) extending along the second direction (Y); the flow channel portion (22) has a first through hole (2203) communicating with the first flow channel (2201) and a second through hole (2204) communicating with the second flow channel (2202) on the side facing the liquid cooling plate (10); The liquid cooling plate (10) has a first connecting end (121) and a second connecting end (122) on the side facing the flow channel (22) that are connected to the cooling flow channel (100); along the third direction (Z), the first connecting end (121) passes through the first through hole (2203), and the second connecting end (122) passes through the second through hole (2204).

2. The battery pack of claim 1, wherein, The side beam body (21) is provided with an inlet (211) and an outlet (212) on the side away from the liquid cooling plate (10) along the second direction (Y). The inlet (211) is connected to the first flow channel (2201), and the outlet (212) is connected to the second flow channel (2202).

3. The battery pack of claim 2, wherein, The side beam body (21) has a third flow channel (213) and a fourth flow channel (214) inside. One end of the third flow channel (213) is connected to the liquid inlet (211) and the other end is connected to the first flow channel (2201). One end of the fourth flow channel (214) is connected to the liquid outlet (212) and the other end is connected to the second flow channel (2202). The flow channel (22) further includes a partition (224); the partition (224) is provided between the first flow channel (2201) and the second flow channel (2202) and between the third flow channel (213) and the fourth flow channel (214) for isolation.

4. The battery pack of claim 1, wherein, The cooling channel (100) includes a first cooling unit (101), a second cooling unit (102), and a converging flow path (103). The first cooling unit (101) and the second cooling unit (102) are independently arranged, and the converging flow path (103) is connected to the first cooling unit (101) and the second cooling unit (102). The first cooling unit (101) includes at least a first flow path (111) and a second flow path (112) extending along the second direction (Y). The first flow path (111) and the second flow path (112) are connected to the first flow channel (2201) at one end along the second direction (Y) near the flow channel portion (22), and the other end is connected to the collecting flow path (103). The second cooling unit (102) includes at least a third flow path (113) and a fourth flow path (114) extending along the second direction (Y). The third flow path (113) and the fourth flow path (114) are connected to the second flow channel (2202) at one end along the second direction (Y) near the flow channel portion (22), and the other end is connected to the collecting flow path (103).

5. The battery pack of claim 1, wherein, The liquid cooling plate (10) includes a flow channel bottom plate (11) and a flow channel cover (12). The flow channel cover (12) is disposed on the side of the flow channel bottom plate (11) along the third direction (Z) close to the flow channel portion (22). The flow channel cover (12) and the flow channel bottom plate (11) together form the cooling flow channel (100). The flow channel cover (12) is provided with a first connecting end (121) and a second connecting end (122) extending along the third direction (Z).

6. The battery pack of claim 2, wherein, The flow channel (22) includes a base (221), a first cover (222), and a second cover (223). The base (221) has a first groove (2211) and a second groove (2212) that are independently arranged. The bottom wall of the first groove (2211) has a first through hole (2203), and the bottom wall of the second groove (2212) has a second through hole (2204). The first connecting end (121) passes through the first through hole (2203) and is welded to the bottom wall of the first groove (2211). The second connecting end (122) passes through the second through hole (2204) and is welded to the bottom wall of the second groove (2212). The first cover (222) and the second cover (223) are both welded to the base (221). The first cover (222) is used to cover the first groove (2211) to form the first flow channel (2201), and the second cover (223) is used to cover the second groove (2212) to form the second flow channel (2202).

7. The battery pack of claim 6, wherein, The base (221) is also provided with a third groove (2213) and a fourth groove (2214); the first cover (222) is built into the third groove (2213), and the second cover (223) is built into the fourth groove (2214).

8. The battery pack of any one of claims 1-7, wherein, The second edge beam (202) further comprises a mounting portion (23) extending from the edge beam body (21) in the second direction (Y) towards the liquid cooling plate (10), the mounting portion (23) being connected to both sides of the flow channel portion (22) in the first direction (X); one side of the mounting portion (23) away from the edge beam body (21) in the second direction (Y) is connected to the liquid cooling plate (10); one side of the mounting portion (23) away from the flow channel portion (22) in the first direction (X) is connected to the first edge beam (201).

9. The battery pack of claim 8, wherein, One side of the mounting portion (23) in the third direction (Z) is provided with a reinforcing rib (231) and a fixing portion (232), the fixing portion (232) being connected to the reinforcing rib (231), and the fixing portion (232) being used for mounting and fixing components.

10. An electric device, characterized by A battery pack comprising any one of the above claims 1 to 9.

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