Battery pack and electric equipment

Abstract

The utility model relates to the technical field of battery packs, and particularly discloses a battery pack and electric equipment.The battery pack has a first direction and a second direction which intersect with each other and comprises a box body, a main flow plate and a splitter plate, and the main flow plate and the splitter plate are arranged in the box body; the main flow plate extends in the first direction, a main flow channel is formed in the main flow plate, the splitter plates are arranged on the two sides, located in the first direction, of the main flow plate and fixedly connected with the main flow plate, the other ends of the splitter plates are fixedly connected with the box body, and the main flow channel communicates with the splitter channels. Mounting grids are formed between the adjacent splitter plates in the first direction, and the battery cells are arranged in the mounting grids. According to the scheme, the entering temperature of the cooling medium in each splitter plate tends to be consistent, the flowing path of the cooling medium is short, the heat exchange consistency and the heat exchange efficiency of different battery cells can be greatly improved, and the performance of the battery pack is improved. And the occupied space is saved while the heat exchange efficiency is well improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery packs, and particularly to a battery pack and an electrical device. Background Art

[0002] A battery pack is a core component of a new energy vehicle. Multiple battery cells are integrated in the battery pack, and heat is generated during the charging and discharging processes of the battery cells. Therefore, the cooling structure of the battery pack has always been the focus of the design of the battery pack.

[0003] In the existing related technologies, the cooling structure of the battery pack is generally immersion cooling or a cooling plate with a flow channel inside is arranged in the battery pack to contact the battery cells for temperature reduction. Among them, in the immersion cooling scheme, the requirement for sealing is relatively strict, which will affect the service life and use and maintenance of the battery pack. In the cooling plate scheme, currently, the cooling plate is mostly arranged on the bottom surface of the battery pack, and the contact area between the cooling plate and the battery cells is insufficient, and the cooling path is too long, resulting in low cooling efficiency and large cooling temperature differences among the battery cells at different positions.

[0004] In some improved schemes, multiple cooling plates are arranged and the cooling plates are arranged between adjacent battery cells to increase the contact area and thus improve the cooling efficiency. However, the arrangement of multiple cooling plates disperses the battery cells, reducing the connection stability between the battery cells, and further affecting the use stability of the battery pack. For this reason, the designer has to add a reinforcement structure to reinforce the cooling plate to improve the restrictive effect of the cooling plate on the battery cells. This further leads to a bloated system structure of the battery pack and low space utilization rate inside the battery pack. Summary of the Utility Model

[0005] The present application provides a battery pack and an electrical device to solve the technical problems of low space utilization rate and insufficient cooling efficiency of the cooling structure inside the battery pack in the existing related technologies.

[0006] In a first aspect, an embodiment of the present application provides a battery pack having intersecting first and second directions, including:

[0007] A box body having an accommodation cavity;

[0008] A main flow board disposed in the accommodation cavity and extending along the first direction, a main liquid inlet channel and a main liquid outlet channel communicating with each other are formed in the main flow board, and a main liquid inlet and a main liquid outlet respectively communicating with the main liquid inlet channel and the main liquid outlet channel are arranged on the main flow board;

[0009] Multiple shunt boards disposed in the accommodation cavity and extending along the second direction, a shunt liquid inlet channel and a shunt liquid outlet channel communicating with each other are formed in the shunt board, and a shunt liquid inlet and a shunt liquid outlet respectively communicating with the shunt liquid inlet channel and the shunt liquid outlet channel are arranged on the shunt board;

[0010] Among them, the flow dividing plates are arranged on both sides of the main flow plate in the first direction. A plurality of the flow dividing plates on the same side of the main flow plate are arranged at intervals in the first direction. Two ends of each flow dividing plate in the second direction are fixedly connected to the main flow plate and the box body respectively. The liquid inlet and the liquid outlet are communicated with the main liquid inlet channel and the main liquid outlet channel respectively;

[0011] It further includes battery cells. Installation grids are formed between the flow dividing plates adjacent in the first direction, and the battery cells are arranged in the installation grids.

[0012] Technical effects of implementing the above technical solutions: First, the cooling medium enters from the main liquid inlet channel and flows out from the main liquid outlet channel, forming a circulation channel in the main flow plate. When the cooling medium flows through the main liquid inlet channel, it will also flow through the liquid inlet channel and the liquid outlet channel, forming a circulation channel in the flow dividing plate. Among them, the cooling medium participates less in heat exchange when flowing through the main liquid inlet channel, that is, the temperature of the cooling medium in the main liquid inlet channel is basically the same. Then, the cooling medium in the main liquid inlet channel enters the flow dividing plate to cool each battery cell. The circulation path of the cooling medium received by each corresponding battery cell is a circulation channel in a flow dividing plate. Generally speaking, the inlet temperature of the cooling medium in each flow dividing plate tends to be the same, which makes the initial temperature of the cooling medium received by each battery cell tend to be the same. Moreover, the cooling path corresponding to each battery cell is only a circulation channel in a flow dividing plate, and the flow path of the cooling medium is short. The above settings greatly improve the consistency and efficiency of heat exchange of different battery cells and improve the performance of the battery pack. Second, the main flow plate and the flow dividing plates can form a plurality of installation grids, which play a role in supporting and fixing the battery cells. And a main flow plate can be connected to two flow dividing plates at the same time. The main flow plate cools part of the end of the battery cell close to the main flow plate, which can better improve the heat exchange efficiency while saving space occupancy.

[0013] As an optional example of the embodiment of the present application, there is also a third direction. The first direction, the second direction and the third direction intersect pairwise. Each flow dividing plate includes a first flow dividing plate and a second flow dividing plate detachably connected in the third direction. The liquid inlet channel and the liquid outlet channel are respectively arranged in the first flow dividing plate and the second flow dividing plate, and the liquid inlet channel and the liquid outlet channel are communicated.

[0014] Technical effects of implementing the above technical solution: The flow distribution plate is designed in a split form. First, it is beneficial for the assembly of the battery cells. Specifically, when assembling the battery pack, the main flow plate can be fixed inside the box first, then the second flow distribution plate below can be installed, and then the battery cells can be assembled. At this time, the height of the battery cells in the third direction is higher than the height of the second flow distribution plate. The integrated pressing plate is used to simultaneously contact and press the surfaces of multiple battery cells to achieve an efficient process of leveling and fixing the battery cells. Finally, the upper half of the flow distribution plate is installed. If the height of the integrated flow distribution plate in the third direction is similar to the height of the battery cells in the traditional technology, it is difficult for the integrated pressing plate to fully press the battery cells at the same time, reducing the assembly quality and efficiency. The split design of the second flow distribution plate is also beneficial for the production, manufacturing, disassembly, and maintenance of the flow distribution plate.

[0015] As an optional example of the embodiment of the present application, a protruding portion is provided on the inner wall of the box facing the battery cells. One end of the first flow distribution plate close to the inner wall of the box is provided with a first connecting member, and the first connecting member is bolted to the protruding portion.

[0016] As an optional example of the embodiment of the present application, one end of the second flow distribution plate close to the inner wall of the box is provided with a second connecting member, and the second connecting member is bolted to the protruding portion.

[0017] Technical effects of implementing the above technical solution: The flow distribution plate realizes the detachable function between the flow distribution plate and the box through the threaded connection of the first connecting member and the second connecting member on the set protruding portion. Welding operations are not required, which improves the installation convenience while ensuring the connection reliability, and is also convenient for later inspection and maintenance.

[0018] As an optional example of the embodiment of the present application, a first clamping member is provided between the first flow distribution plates located on both sides of the main flow plate along the second direction. One side surface of the first clamping member facing the main flow plate is provided with a first clamping portion, and a first limiting portion engaged with the first clamping portion is provided on the main flow plate. The first clamping portion and the first limiting portion are engaged with each other to limit the movement of the flow distribution plate along the first direction.

[0019] As an optional example of the embodiment of the present application, a second clamping member is provided between the second flow distribution plates located on both sides of the main flow plate along the second direction. One side surface of the second clamping member facing the main flow plate is provided with a second clamping portion, and a second limiting portion engaged with the second clamping portion is provided on the main flow plate. The second clamping portion and the second limiting portion are engaged with each other to limit the movement of the flow distribution plate along the first direction.

[0020] Technical effects of implementing the above technical solution: The specific structure of the connection between the flow distribution plate and the main flow plate is disclosed. On the one hand, the cooperation between the first clamping member and the second clamping member and the first limiting portion and the second limiting portion respectively can realize the accurate alignment and installation process of the first flow distribution plate and the second flow distribution plate with the main flow plate, effectively reducing the workload while improving the installation accuracy. On the other hand, after the first flow distribution plate and the second flow distribution plate are connected to the box body, the position of the main flow plate can be effectively limited, further ensuring the reliability of the main flow plate and the flow distribution plate, and forming a more reliable supporting and fixing effect on the battery cells.

[0021] As an optional example of the embodiment of the present application, a liquid inlet joint is provided on one side of the first flow distribution plate facing the main flow plate. The liquid inlet joint is inserted into the main flow plate so that the liquid inlet channel communicates with the main liquid inlet channel. The inlet of the liquid inlet joint forms the liquid inlet. A liquid outlet joint is provided on one side of the second flow distribution plate facing the main flow plate. The liquid outlet joint is inserted into the main flow plate so that the liquid outlet channel communicates with the main liquid outlet channel. The outlet of the liquid outlet joint forms the liquid outlet.

[0022] As an optional example of the embodiment of the present application, the main liquid inlet and the main liquid outlet are located at the same end of the main flow plate in the first direction.

[0023] As an optional example of the embodiment of the present application, an insertion interface is provided on the inner wall of the box body along the first direction. One end of the main flow plate close to the insertion interface is embedded in the insertion interface and is hermetically connected to the insertion interface. The other end of the main flow plate is fixedly connected to the inner wall of the box body.

[0024] Realizing the technical effects of the above technical solution, the end of the main flow plate is embedded in the insertion interface. Therefore, this end of the main flow plate is limited by the insertion interface in the second direction, further ensuring the reliability of the connection between the main flow plate and the box body, and making the supporting and fixing effect on the battery cells more effective.

[0025] As an optional example of the embodiment of the present application, the insertion interface penetrates through the box body along the first direction. The battery pack further includes a plug-in module detachably connected to the box body. A liquid injection channel and a return channel are provided on the plug-in module. The liquid injection channel and the return channel of the plug-in module are respectively hermetically communicated with the main liquid inlet channel and the main liquid outlet channel.

[0026] As an optional example of the embodiment of the present application, a clamping groove for the plug-in module to be clamped and matched is provided on one side of the box body facing away from the main flow plate in the first direction. The plug-in module is bolted and fixed in the clamping groove.

[0027] Technical effects of implementing the above technical solution: The design of the plug-in module makes it very convenient for the main board to communicate with the outside world. When processing the battery pack, simply fixing the plug-in module in the clamping groove can make the liquid injection channel and the reflux channel be hermetically connected to the main liquid inlet channel and the main liquid outlet channel respectively, facilitating the connection between the main board and the outside world, with simple installation and a simple and compact structure.

[0028] As an optional example of the embodiment of the present application, the sub-liquid inlet channel and the sub-liquid outlet channel are in an arc transition, and a chamfer is provided at one end of the flow distribution plate away from the main board.

[0029] On the other hand, the embodiment of the present application also provides an electrical device, including: the battery pack described above.

[0030] One of the technical solutions in the above technical solution has the following advantages or beneficial effects:

[0031] 1. First, the cooling medium enters from the main liquid inlet channel and flows out from the main liquid outlet channel, forming a circulation channel in the main board. While the cooling medium flows through the main liquid inlet channel, it will also flow through the sub-liquid inlet channel and the sub-liquid outlet channel, forming a circulation channel in the flow distribution plate. Among them, the cooling medium participates less in heat exchange when flowing through the main liquid inlet channel, that is, the temperature of the cooling medium in the main liquid inlet channel is basically the same. Then, the cooling medium in the main liquid inlet channel enters the flow distribution plate to cool each battery cell. The circulation path of the cooling medium received by each corresponding battery cell is a circulation channel in a flow distribution plate. In summary, the inlet temperature of the cooling medium in each flow distribution plate tends to be the same, which makes the initial temperature of the cooling medium received by each battery cell tend to be the same. Moreover, the cooling path corresponding to each battery cell is only a circulation channel in a flow distribution plate, and the flow path of the cooling medium is short. The above settings greatly improve the consistency and efficiency of heat exchange between different battery cells, and improve the performance of the battery pack. Second, the main board and the flow distribution plate can form multiple installation grids to support and fix the battery cells. And one main board can connect two flow distribution plates at the same time. The main board partially cools one end of the battery cell close to the main board, which can better improve the heat exchange efficiency while saving space occupancy.

[0032] 2. The flow distribution plate adopts a split design, which is beneficial for the assembly of the battery cells in two aspects. Specifically, when assembling the battery pack, the main flow plate can be fixed in the box first, and then the second flow distribution plate below can be installed. After that, the battery cells are assembled. At this time, the height of the battery cells in the third direction is higher than that of the second flow distribution plate. By using an integrated pressing plate to simultaneously contact and press the surfaces of multiple battery cells, an efficient process of leveling and fixing the battery cells can be achieved. Finally, the upper half of the flow distribution plate is installed. If the height of the integrated flow distribution plate in the third direction is similar to that of the battery cells as in the traditional technology, it is difficult for the integrated pressing plate to fully press the battery cells simultaneously, reducing the assembly quality and efficiency. The split design of the second flow distribution plate is also beneficial for the production, manufacturing, disassembly, and maintenance of the flow distribution plate. Description of the Drawings

[0033] The following, in conjunction with the drawings, through a detailed description of the specific embodiments of the present application, will make the technical solutions and other beneficial effects of the present application obvious.

[0034] Figure 1 is the overall structure diagram of the battery pack provided in Embodiment 1 of the present application;

[0035] Figure 2 is the exploded structure diagram of the battery pack provided in Embodiment 1 of the present application;

[0036] Figure 3 is the exploded structure diagram mainly used to show the connection position relationship among the main flow plate, the flow distribution plate, and the battery cells provided in Embodiment 1 of the present application;

[0037] Figure 4 is the schematic diagram mainly used to show the structure of the main flow plate provided in Embodiment 1 of the present application;

[0038] Figure 5 is the schematic diagram mainly used to show the structure of the flow distribution plate provided in Embodiment 1 of the present application;

[0039] Figure 6 is provided in Embodiment 1 of the present application Figure 5 partial enlarged view of part A;

[0040] Figure 7 is provided in Embodiment 1 of the present application Figure 5 partial enlarged view of part B;

[0041] Figure 8 is the exploded structure diagram mainly used to show the structure of the plug-in module provided in Embodiment 1 of the present application;

[0042] Figure 9 is the exploded structure diagram from another perspective mainly used to show the structure of the plug-in module provided in Embodiment 1 of the present application;

[0043] Figure 10It is a cross-sectional view mainly used to show the structure of the plug-in module provided in Embodiment 1 of the present application.

[0044] Reference numerals: 1, box body; 11, bottom box; 12, cover plate; 1a, accommodating cavity; 1b, insertion opening; 1c, clamping groove;

[0045] 2, main flow board; 21, main liquid inlet channel; 2a, main liquid inlet; 22, main liquid outlet channel; 2b, main liquid outlet; 23, first limiting part; 24, second limiting part; 25, partition board;

[0046] 3, shunt board; 31, sub-liquid inlet channel; 3a, sub-liquid inlet; 32, sub-liquid outlet channel; 3b, sub-liquid outlet; 301, first shunt board; 3011, first connecting piece; 3012, sub-liquid inlet joint; 302, second shunt board; 3021, second connecting piece; 3022, sub-liquid outlet joint; 303, connection port;

[0047] 4, battery cell; 5, installation grid; 6, convex part;

[0048] 7, first clamping piece; 71, first clamping part; 8, second clamping piece; 81, second clamping part;

[0049] 10, plug-in module; 101, liquid injection channel; 1011, plug-in entrance; 102, return channel; 1021, plug-in exit; 103, isolation board;

[0050] X, first direction; Y, second direction; Z, third direction. Detailed implementation manners

[0051] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0052] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the term "and / or" in this article is only a description of the associated relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after without special instructions.

[0053] The following will further describe the present application in conjunction with the attached Figure 1-10 description.

[0054] First aspect

[0055] Reference Figures 1-3 Figures 1-3 , an embodiment of the present application provides a battery pack having intersecting first direction X, second direction Y, and third direction Z. Specifically, in an optional example, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other in pairs.

[0056] Optionally, the first direction X may be the length direction of the battery pack, the second direction Y may be the width direction of the battery pack, and the third direction Z may be the height direction of the battery pack.

[0057] The battery pack includes a box body 1, the box body 1 includes a bottom box 11 and a cover plate 12, and a receiving cavity 1a is provided in the box body 1. Specifically, in an optional example, the bottom box 11 has a receiving cavity 1a that is open along the third direction Z, and the cover plate 12 is covered on the bottom box 11 along the third direction Z to close the receiving cavity 1a.

[0058] Reference Figure 3 Figure 3 , the battery pack further includes a main flow plate 2, a flow dividing plate 3, and a battery cell 4 disposed in the receiving cavity 1a. Among them, the main flow plate 2 is fixedly disposed in the receiving cavity 1a and extends along the first direction X. There are a plurality of flow dividing plates 3, and each flow dividing plate 3 extends along the second direction Y. The flow dividing plates 3 are connected to both sides of the main flow plate 2 in the second direction Y, and the flow dividing plates 3 on the same side of the main flow plate 2 are arranged at intervals along the first direction X.

[0059] An installation grid 5 is formed between the flow dividing plates 3 adjacent to each other along the first direction X, and the battery cell 4 is disposed in the installation grid 5. In an optional example, one battery cell 4 is disposed in one installation grid 5. It should be noted that the battery cell 4 refers to a battery monomer.

[0060] Reference Figure 3 and Figure 4 Figure 4 , a main liquid inlet channel 21 and a main liquid outlet channel 22 that communicate with each other are formed in the main flow plate 2, and a main liquid inlet port 2a and a main liquid outlet port 2b that communicate with the main liquid inlet channel 21 and the main liquid outlet channel 22 respectively are provided on the main flow plate 2.

[0061] Specifically, in an optional example, a main flow channel is formed on the main flow plate 2 along the first direction X, and the other end of the main flow channel does not penetrate the main flow plate 2, that is, the other end of the main flow channel is closed. At least one partition plate 25 is disposed in the main flow channel along the first direction X, and the partition plate 25 divides the main flow channel into a main liquid inlet flow channel and a main liquid outlet flow channel that are adjacent to each other in the third direction Z. There is a gap between the other end of the partition plate 25 and the closed position, so as to facilitate the communication between the main liquid inlet flow channel and the main liquid outlet flow channel. The cooling medium enters the main liquid inlet channel 21 from the main liquid inlet port 2a, then enters the main liquid outlet channel 22 from the gap at the end of the main liquid inlet channel 21, and finally flows out from the main liquid outlet port 2b.

[0062] Reference Figures 3-6, a diversion plate 3 is provided with a communicating inlet channel 31 and an outlet channel 32. The diversion plate 3 is provided with an inlet port 3a and an outlet port 3b that are respectively and communicatively connected to the inlet channel 31 and the outlet channel 32. Each diversion plate 3 is fixedly connected to the main flow plate 2 and the box body 1 at both ends in the second direction Y. The inlet port 3a and the outlet port 3b are respectively communicatively connected to the main inlet channel 21 and the main outlet channel 22.

[0063] Specifically, in an example, a side surface of the first diversion plate 301 facing the main flow plate 2 is provided with an inlet joint 3012. The inlet joint 3012 is inserted into the main flow plate 2 so that the inlet channel 31 is communicatively connected to the main inlet channel 21. The inlet of the inlet joint 3012 forms the inlet port 3a. A side surface of the second diversion plate 302 facing the main flow plate 2 is provided with an outlet joint 3022. The outlet joint 3022 is inserted into the main flow plate 2 so that the outlet channel 32 is communicatively connected to the main outlet channel 22. The outlet of the outlet joint 3022 forms the outlet port 3b.

[0064] In an alternative example, the inlet joint 3012 and the outlet joint 3022 respectively protrude from the side surfaces of the first diversion plate 301 and the second diversion plate 302 close to the main flow plate.

[0065] The above settings result in the following: First, the cooling medium enters from the main inlet channel 21 and flows out from the main outlet channel 22, forming a circulation channel in the main flow plate 2. While the cooling medium flows through the main inlet channel 21, it will also flow through the inlet channel 31 and the outlet channel 32, forming a circulation channel in the diversion plate 3. Among them, the cooling medium participates less in heat exchange when flowing through the main inlet channel 21. That is, the temperature of the cooling medium in the main inlet channel 21 is basically the same. Then, the cooling medium in the main inlet channel 21 enters the diversion plate 3 to cool each battery cell 4. The circulation path of the cooling medium received by each corresponding battery cell 4 is a circulation channel in a diversion plate 3. In summary, the inlet temperature of the cooling medium in each diversion plate 3 is the same, which makes the initial temperature of the cooling medium received by each battery cell 4 the same. Moreover, the cooling path corresponding to each battery cell 4 is only a circulation channel in a diversion plate 3, and the flow path of the cooling medium is short. The above settings greatly improve the heat exchange consistency and efficiency of different battery cells 4, improving the performance of the battery pack. Second, the main flow plate 2 and the diversion plate 3 can form multiple installation grids 5, which play a role in supporting and fixing the battery cells 4. And one main flow plate 2 can be connected to two diversion plates 3 at the same time. The main flow plate 2 cools part of the end of the battery cell 4 close to the main flow plate 2, which can better improve the heat exchange efficiency while saving space occupancy.

[0066] Refer to Figure 3 , Figure 5 and Figure 7, each flow dividing plate 3 includes a first flow dividing plate 301 and a second flow dividing plate 302 detachably connected in the third direction Z. The liquid inlet channel 31 and the liquid outlet channel 32 are respectively arranged in the first flow dividing plate 301 and the second flow dividing plate 302, and the liquid inlet channel 31 and the liquid outlet channel 32 are communicated.

[0067] Specifically, in an example, a connection port 303 is provided on a side surface of the second flow dividing plate 302 facing the first flow dividing plate 301. The connection port 303 is inserted into the second flow dividing plate 302 so that the liquid inlet channel 31 and the liquid outlet channel 32 are communicated.

[0068] The above settings enable the flow dividing plate 3 to adopt a split design, which is beneficial to the assembly of the battery cell 4. Specifically, when assembling the battery pack, the main flow plate 2 can be fixed in the box body 1 first, then the second flow dividing plate 302 below can be installed, and then the battery cell 4 can be assembled. At this time, the height of the battery cell 4 in the third direction Z is higher than the height of the second flow dividing plate 302. The integrated pressing plate is used to simultaneously contact and press the surfaces of multiple battery cells 4 to achieve an efficient process of leveling and fixing the battery cell 4. Finally, the upper half of the flow dividing plate 3 is installed; if the integrated flow dividing plate 3 in the traditional technology has a height similar to that of the battery cell 4 in the third direction Z, it is difficult for the integrated pressing plate to fully press the battery cell 4 at the same time, reducing the assembly quality and efficiency; the split design of the second flow dividing plate 302 is also beneficial to the production, manufacture, disassembly and maintenance of the flow dividing plate 3.

[0069] It should be noted that the liquid inlet channel 31 and the liquid outlet channel 32 are in an arc transition, and a chamfer is provided at one end of the flow dividing plate 3 away from the main flow plate 2. This setting is more convenient for the smooth flow of the cooling medium, and can effectively save materials and reduce production costs.

[0070] Refer to Figure 3 、 Figure 5 and Figure 7 , as an optional embodiment of the present application, a convex portion 6 is provided on the inner wall of the box body 1 facing the battery cell 4. A first connecting member 3011 is provided at one end of the first flow dividing plate 301 close to the inner wall of the box body 1, and the first connecting member 3011 is bolted to the convex portion 6. A second connecting member 3021 is provided at one end of the second flow dividing plate 302 close to the inner wall of the box body 1, and the second connecting member 3021 is bolted to the convex portion 6.

[0071] Specifically, in an optional example, the protruding portion 6 is a flat connecting plate. A plurality of threaded holes are provided through the protruding portion 6 along the third direction Z. The first connecting member 3011 and the second connecting member 3021 are respectively arranged in a flat plate shape and are integrally connected to the first flow dividing plate 301 and the second flow dividing plate 302 correspondingly. Through holes are provided on both the first connecting member 3011 and the second connecting member 3021. During installation, bolts pass through the through holes and threaded holes on the first connecting member 3011 and the second connecting member 3021 at the same time, and the bolts are threadedly connected to the threaded holes. Nuts are provided at the other ends of the bolts for locking.

[0072] The above settings enable the flow dividing plate 3 to be detachably connected to the box body 1 through the threaded connection of the first connecting member 3011 and the second connecting member 3021 to the protruding portion 6, without welding operation, improving the installation convenience while ensuring the connection reliability, and also facilitating the later maintenance.

[0073] Refer to Figures 3-6 As an optional embodiment of the present application, a first clamping member 7 is provided between the first flow dividing plates 301 located on both sides of the main flow plate 2 along the second direction Y. A first clamping portion 71 is provided on a side surface of the first clamping member 7 facing the main flow plate 2. A first limiting portion 23 is provided on the main flow plate 2 and is in clamping cooperation with the first clamping portion 71. The first clamping portion 71 and the first limiting portion 23 are in clamping cooperation to limit the movement of the flow dividing plate 3 along the first direction X. A second clamping member 8 is provided between the second flow dividing plates 302 located on both sides of the main flow plate 2 along the second direction Y. A second clamping portion 81 is provided on a side surface of the second clamping member 8 facing the main flow plate 2. A second limiting portion 24 is provided on the main flow plate 2 and is in clamping cooperation with the second clamping portion 81. The second clamping portion 81 and the second limiting portion 24 are in clamping cooperation to limit the movement of the flow dividing plate 3 along the first direction X.

[0074] Specifically, in an example, both the first clamping member 7 and the second clamping member 8 are arranged in a U-shaped structure. Both the first clamping portion 71 and the second clamping portion 81 are arranged in a strip-shaped protruding structure. Both the first limiting portion 23 and the second limiting portion 24 are arranged in a sunken groove structure. During installation, the first clamping member 7 is clamped from the third direction Z from top to bottom to the outside of the main flow plate 2 and the first clamping portion 71 is clamped into the first limiting portion 23; the second clamping member 8 is clamped from the third direction Z from bottom to top to the outside of the main flow plate 2 and the second clamping portion 81 is clamped into the second limiting portion 24. And the liquid inlet 3a is communicated with the main liquid inlet channel 21, and the liquid outlet 3b is communicated with the main liquid outlet channel 22.

[0075] The above settings disclose the specific structure of the connection between the flow dividing plate 3 and the main flow plate 2. On the one hand, the cooperation of the first clamping member 7 and the second clamping member 8 with the first limiting portion 23 and the second limiting portion 24 respectively can realize the accurate alignment and installation process of the first flow dividing plate 301 and the second flow dividing plate 302 with the main flow plate 2, effectively reducing the workload while improving the installation accuracy. On the other hand, after the first flow dividing plate 301 and the second flow dividing plate 302 are connected to the box body 1, the position of the main flow plate 2 can be effectively limited, further ensuring the reliability of the main flow plate 2 and the flow dividing plate 3, and forming a more reliable supporting and fixing effect on the battery cell 4.

[0076] Referring to Figure 3 , as an optional example of the embodiment of the present application, the main liquid inlet 2a and the main liquid outlet 2b are located at the same end of the main flow plate 2 in the first direction X. An insertion port 1b is provided on the inner wall of the box body 1 along the first direction X. One end of the main flow plate 2 close to the insertion port 1b is embedded in the insertion port 1b and is hermetically connected to the insertion port 1b, and the other end of the main flow plate 2 is fixedly connected to the inner wall of the box body 1.

[0077] The above settings make the end of the main flow plate 2 embedded in the insertion port 1b. Therefore, the end of the main flow plate 2 is limited by the insertion port 1b in the second direction Y, further ensuring the reliability of the connection between the main flow plate 2 and the box body 1, and making the supporting and fixing effect on the battery cell 4 more effective.

[0078] Referring to Figure 3 、 Figures 8-10 , as an optional example of the embodiment of the present application, the insertion port 1b penetrates through the box body 1 along the first direction X. The battery pack further includes a plug-in module 10 detachably connected to the box body 1. The plug-in module 10 is provided with a liquid injection channel 101 and a return channel 102. The liquid injection channel 101 and the return channel 102 of the plug-in module 10 are hermetically communicated with the main liquid inlet channel 21 and the main liquid outlet channel 22 respectively. A clamping groove 1c for the plug-in module 10 to be clamped and fitted is provided on one side of the box body 1 facing away from the main flow plate 2 in the first direction X. The plug-in module 10 is bolted and fixed in the clamping groove 1c.

[0079] Specifically, in an optional example, the plug-in module 10 is in a cross shape, and a plug-in inlet 1011 and a plug-in outlet 1021 are sequentially arranged in the second direction Y. The liquid injection channel 101 and the return channel 102 are arranged inside the plug-in module 10. The plug-in inlet 1011 and the plug-in outlet 1021 are respectively communicated with the liquid injection channel 101 and the return channel 102. A partition plate 103 is provided at the middle position of the plug-in module 10. The partition plate 103 is used to separate the liquid injection channel 101 and the return channel 102. When the plug-in module 10 is inserted into the clamping groove 1c, the partition plate 103 is in close contact with the partition plate 25 to achieve sealing, and the end of the main flow plate 2 and the plug-in module 10 are also sealed. At this time, the liquid injection channel 101 is communicated with the main liquid inlet channel 21, and the return channel 102 is communicated with the main liquid outlet channel 22.

[0080] With the above settings, the design of the plug-in module 10 makes it very convenient for the main board 2 to communicate with the outside world. When processing the battery pack, simply fixing the plug-in module 10 in the clamping groove 1c can make the liquid injection channel 101 and the reflux channel 102 be hermetically connected to the main liquid inlet channel 21 and the main liquid outlet channel 22 respectively, facilitating the connection between the main board 2 and the outside world. The installation is simple and the structure is simple and compact.

[0081] On the other hand, the embodiment of the present application also provides an electrical device, including: the battery pack described above. The electrical device includes, but is not limited to, automobiles, power tools, industrial machines, etc.

[0082] As described above, only some embodiments of the present application are provided, and there is no limitation in any form to this application. The protection scope of the embodiments of the present application is not limited thereto. Any simple modifications, equivalent changes, and decorations that can be easily thought of by those skilled in the technical field of the present application within the technical scope disclosed by the embodiments of the present application should be covered within the protection scope of the embodiments of the present application.

Claims

1. A battery pack having a first direction (X) and a second direction (Y) intersecting each other, characterized in that: include: A box body (1) having a containing cavity (1a); A main flow plate (2) is fixedly arranged in the accommodating cavity (1a) and extends along the first direction (X), wherein a main liquid inlet channel (21) and a main liquid outlet channel (22) which are in communication with each other are provided in the main flow plate (2), and a main liquid inlet port (2a) and a main liquid outlet port (2b) which are in communication with the main liquid inlet channel (21) and the main liquid outlet channel (22) are provided on the main flow plate (2); A plurality of flow dividers (3) are arranged in the accommodating cavity (1a) and extend along the second direction (Y), wherein the flow dividers (3) are provided with a liquid inlet channel (31) and a liquid outlet channel (32) that are interconnected, and the flow dividers (3) are provided with a liquid inlet port (3a) and a liquid outlet port (3b) that are respectively connected to the liquid inlet channel (31) and the liquid outlet channel (32); The diverter plate (3) is arranged on both sides of the mainstream plate (2) in the first direction (X), and a plurality of diverter plates (3) located on the same side of the mainstream plate (2) are arranged at intervals along the first direction (X). Both ends of each diverter plate (3) located in the second direction (Y) are respectively fixedly connected to the mainstream plate (2) and the box body (1), and the branch liquid inlet (3a) and the branch liquid outlet (3b) are respectively connected to the main liquid inlet channel (21) and the main liquid outlet channel (22); It also comprises an electric core (4), wherein an installation grid (5) is formed between the diverter plates (3) adjacent to each other along the first direction (X), and the electric core (4) is arranged in the installation grid (5).

2. The battery pack according to claim 1, characterized in that: It also has a third direction (Z), and the first direction (X), the second direction (Y) and the third direction (Z) intersect each other, and is characterized in that each of the diverter plates (3) includes a first diverter plate (301) and a second diverter plate (302) that are detachably connected in the third direction (Z), the liquid inlet channel (31) and the liquid outlet channel (32) are respectively arranged in the first diverter plate (301) and the second diverter plate (302), and the liquid inlet channel (31) and the liquid outlet channel (32) are connected.

3. The battery pack according to claim 2, characterized in that: The inner wall of the box body (1) is provided with a protrusion (6) facing the battery core (4), and the first diverter plate (301) is provided with a first connecting piece (3011) at one end close to the inner wall of the box body (1), and the first connecting piece (3011) is bolted to the protrusion (6).

4. The battery pack according to claim 3, characterized in that: A second connecting piece (3021) is provided at one end of the second diverter plate (302) close to the inner wall of the box body (1), and the second connecting piece (3021) is bolted to the raised portion (6).

5. The battery pack according to claim 2 or 4, characterized in that: A first clamping member (7) is provided between the first diverter plates (301) located on both sides of the mainstream plate (2) along the second direction (Y); a first clamping portion (71) is provided on a side of the first clamping member (7) facing the mainstream plate (2); a first limiting portion (23) is provided on the mainstream plate (2) and is engaged with the first clamping portion (71); the first clamping portion (71) is engaged with the first limiting portion (23) to limit the movement of the diverter plate (3) along the first direction (X).

6. The battery pack according to claim 5, characterized in that: A second clamping member (8) is provided between the second diverter plates (302) located on both sides of the mainstream plate (2) along the second direction (Y); a second clamping portion (81) is provided on the side of the second clamping member (8) facing the mainstream plate (2); a second limiting portion (24) is provided on the mainstream plate (2) to be clamped with the second clamping portion (81); the second clamping portion (81) is clamped with the second limiting portion (24) to limit the movement of the diverter plate (3) along the first direction (X).

7. The battery pack according to claim 6, characterized in that: A branch liquid inlet joint (3012) is provided on a side of the first diverter plate (301) facing the mainstream plate (2); the branch liquid inlet joint (3012) is plugged into the mainstream plate (2) so that the branch liquid inlet channel (31) is in communication with the main liquid inlet channel (21); the inlet of the branch liquid inlet joint (3012) forms the branch liquid inlet port (3a); a branch liquid outlet joint (3022) is provided on a side of the second diverter plate (302) facing the mainstream plate (2); the branch liquid outlet joint (3022) is plugged into the mainstream plate (2) so that the branch liquid outlet channel (32) is in communication with the main liquid outlet channel (22); the outlet of the branch liquid outlet joint (3022) forms the branch liquid outlet port (3b).

8. The battery pack according to claim 1, wherein: The main liquid inlet (2a) and the main liquid outlet (2b) are located at the same end of the main flow plate (2) in the first direction (X).

9. The battery pack according to claim 1 or 8, characterized in that: The inner wall of the box body (1) is provided with an insertion port (1b) along the first direction (X); one end of the mainstream plate (2) close to the insertion port (1b) is embedded in the insertion port (1b) and is sealed to the insertion port (1b); the other end of the mainstream plate (2) is fixedly connected to the inner wall of the box body (1).

10. The battery pack according to claim 9, characterized in that: The plug-in port (1b) penetrates the box (1) along the first direction (X); the battery pack further comprises a plug-in module (10) detachably connected to the box (1); the plug-in module (10) is provided with a liquid injection channel (101) and a return channel (102); the liquid injection channel (101) and the return channel (102) of the plug-in module (10) are respectively sealed and connected to the main liquid inlet channel (21) and the main liquid outlet channel (22).

11. The battery pack according to claim 10, characterized in that: The box body (1) is provided with a snap-in groove (1c) on a side facing away from the mainstream board (2) in the first direction (X) for the plug-in module (10) to snap-in and fit with. The plug-in module (10) is bolted into the snap-in groove (1c).

12. The battery pack according to claim 1, wherein: The liquid inlet channel (31) and the liquid outlet channel (32) are in an arc-shaped transition, and a chamfer is provided at one end of the flow dividing plate (3) away from the main flow plate (2).

13. An electrical equipment, characterized in that: include: A battery pack as claimed in any one of claims 1 to 12.

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