Battery pack

Abstract

The utility model discloses a battery pack. A battery pack comprises a box body, a battery cell and a liquid cooling plate. A mounting cavity is formed in the box body. The battery cell is arranged in the mounting cavity and comprises a battery cell body and a battery cell folding edge, and the battery cell folding edge is arranged on the outer side of the battery cell body in a protruding mode. The liquid cooling plate is arranged on the box body, a plurality of liquid cooling channels are arranged on the liquid cooling plate in a protruding mode, liquid cooling media are contained in the liquid cooling channels, a containing groove is formed between every two adjacent liquid cooling channels, the battery cell folded edges are arranged in the containing grooves, and the battery cell bodies abut against the liquid cooling channels. In the battery pack, no gap exists between the battery cell body and the liquid cooling channel, and heat generated by the battery cell body can be directly conducted to the liquid cooling medium of the liquid cooling channel, so that the liquid cooling effect of the liquid cooling plate is improved, the temperature of the battery cell body is reduced, and the safety of the battery pack is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery equipment, in particular to a battery pack. Background Art

[0002] During the operation of a soft-pack battery cell, heat is generated. The heat generated by the soft-pack battery cell is conducted to a liquid cooling plate to achieve heat dissipation of the soft-pack battery cell. The existing liquid cooling plate has a planar structure. There is a cell edge of aluminum-plastic film on the side of the soft-pack battery cell. The cell edge protrudes relative to the side of the soft-pack battery cell and contacts the liquid cooling plate, so that the soft-pack battery cell cannot directly contact the liquid cooling plate, greatly reducing the heat conduction of the soft-pack battery to the liquid cooling plate and reducing the cooling effect of the liquid cooling plate on the soft-pack battery cell. Summary of the Utility Model

[0003] The main object of the utility model is to provide a battery pack, aiming to solve the technical problem of poor cooling effect of soft-pack battery cells.

[0004] To achieve the above utility model object, the utility model first aspect provides a battery pack.

[0005] The battery pack includes:

[0006] A box body, an installation cavity is provided inside the box body;

[0007] A battery cell, the battery cell is arranged in the installation cavity, the battery cell includes a cell body and a cell edge, and the cell edge protrudes outside the cell body; and

[0008] A liquid cooling plate, the liquid cooling plate is arranged on the box body, a plurality of liquid cooling channels are convexly arranged on the liquid cooling plate, a liquid cooling medium is accommodated in the liquid cooling channels, a accommodation groove is formed between two adjacent liquid cooling channels, the cell edge is arranged in the accommodation groove, and the cell body abuts against the liquid cooling channel.

[0009] In one embodiment, an opening is provided at the bottom of the box body, the opening is communicated with the installation cavity, and the liquid cooling plate seals the opening.

[0010] In one embodiment, a groove is provided on the liquid cooling plate, and a cover plate is covered on the groove to form the liquid cooling channel, and the cell body abuts against the cover plate.

[0011] In one embodiment, the battery pack further includes a first flow guiding member and a second flow guiding member, the first flow guiding member and the second flow guiding member are used for connecting an external pipeline, and both the first flow guiding member and the second flow guiding member are communicated with the liquid cooling channel, and the liquid cooling medium can circulate through the external pipeline, the first flow guiding member, the liquid cooling channel, and the second flow guiding member.

[0012] In one embodiment, a first pipe interface and a first accommodating cavity are provided in the first flow guide member and are in communication with each other. The first pipe interface is used to communicate with an external pipe, and the first accommodating cavity is in communication with a plurality of the liquid cooling channels. The liquid cooling medium can enter the plurality of liquid cooling channels through the first pipe interface and the first accommodating cavity; and / or

[0013] A second pipe interface and a second accommodating cavity are provided in the second flow guide member and are in communication with each other. The second pipe interface is used to communicate with an external pipe, and the second accommodating cavity is in communication with a plurality of liquid cooling channels. The liquid cooling medium in the plurality of liquid cooling channels flows into the external pipe through the second accommodating cavity and the second pipe interface.

[0014] In one embodiment, a first recess is formed on one side of the first flow guide member facing the liquid cooling plate, and the first recess is sealingly connected to one end of the cover plate so that the liquid cooling medium in the first accommodating cavity can flow into the liquid cooling channel; and / or

[0015] A second recess is formed on one side of the second flow guide member facing the liquid cooling plate, and the second recess is sealingly connected to the other end of the cover plate so that the liquid cooling medium in the liquid cooling channel can flow into the second accommodating cavity.

[0016] In one embodiment, the battery pack further includes at least two clamping plate assemblies, the clamping plate assemblies are arranged at intervals in the installation cavity, and the clamping plate assemblies can clamp the battery cells.

[0017] In one embodiment, the clamping plate assembly includes side plates, a first end plate and a second end plate. The first end plate is arranged at one end of the side plate, and the second end plate is arranged at the other end of the side plate. The first end plate and the second end plate extend from the side plate in the same direction. The first end plate, the second end plate and the side plate enclose an installation space, and the battery cell is attached to the side plate and is located in the installation space.

[0018] In one embodiment, the first end plate is a heat conduction structure. The first end plate is arranged in the accommodating groove and is in abutment with the folded edge of the battery cell, and the heat of the battery cell body can be conducted to the liquid cooling plate through the folded edge of the battery cell and the first end plate.

[0019] In one embodiment, the clamping plate assembly further includes a buffer layer. The buffer layer is arranged between the battery cell body and the side plate, and the buffer layer is used to buffer the acting force between the battery cell body and the side plate.

[0020] In one embodiment, an exhaust port is formed in the second end plate, and the exhaust port communicates with the installation space and the installation cavity, so that the gas in the installation space can enter the installation cavity through the exhaust port.

[0021] In one embodiment, the side plate is a heat insulation plate.

[0022] Beneficial effects:

[0023] In the present utility model, the battery cell includes a battery cell body and a battery cell folded edge. The battery cell folded edge protrudes from the outside of the battery cell body. A plurality of liquid cooling channels protrude from the liquid cooling plate. A receiving groove is formed between two adjacent liquid cooling channels. The battery cell folded edge is arranged in the receiving groove, and the battery cell body can be in contact with the liquid cooling channels, so that the heat generated by the battery cell body can be conducted to the liquid cooling medium in the liquid cooling channels. That is, the battery cell folded edge protruding from the outside of the battery cell body is arranged in the receiving groove, so that the battery cell body can be directly in contact with the liquid cooling channels, there is no gap between the battery cell body and the liquid cooling channels, and the heat generated by the battery cell body can be directly conducted to the liquid cooling medium in the liquid cooling channels, thereby improving the liquid cooling effect of the liquid cooling plate, reducing the temperature of the battery cell body, and improving the safety of the battery pack. Description of the drawings

[0024] Figure 1 is an exploded view of a battery pack in an embodiment of the present utility model.

[0025] Figure 2 is a top view of a battery pack in an embodiment of the present utility model.

[0026] Figure 3 is Figure 2 a cross-sectional view along the A-A direction.

[0027] Figure 4 is Figure 3 an enlarged view of part B.

[0028] Figure 5 is a structural schematic diagram of a battery cell in an embodiment of the present utility model.

[0029] Figure 6 is a side view of a battery cell in an embodiment of the present utility model.

[0030] Figure 7 is a structural schematic diagram of a liquid cooling plate, a first flow guiding member and a second flow guiding member in an embodiment of the present utility model.

[0031] Figure 8 is a structural schematic diagram of a liquid cooling plate in an embodiment of the present utility model.

[0032] Figure 9 is Figure 8 an enlarged view of part C.

[0033] Figure 10 It is a schematic structural diagram of the first flow guide member in an embodiment of the present utility model.

[0034] Figure 11 It is a schematic structural diagram of the clamping plate assembly in an embodiment of the present utility model.

[0035] Wherein:

[0036] 100 - box body; 110 - installation cavity; 120 - opening; 130 - box cover;

[0037] 200 - battery cell; 210 - battery cell body; 220 - battery cell hemming;

[0038] 300 - liquid cooling plate; 310 - liquid cooling channel; 311 - accommodating groove; 312 - cover plate; 313 - groove;

[0039] 400 - first flow guide member; 410 - first pipe interface; 420 - first accommodating cavity; 430 - first recessed part;

[0040] 500 - second flow guide member;

[0041] 600 - clamping plate assembly; 610 - side plate; 620 - first end plate; 630 - second end plate; 631 - exhaust port; 640 - buffer layer.

[0042] The realization of the purpose, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific Embodiments

[0043] It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0044] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, "a plurality" means two or more, unless otherwise specifically defined.

[0045] In the description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0046] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0047] As Figure 1 shown, in some embodiments, a battery pack includes a box body 100, an electric core 200, and a liquid cooling plate 300. The box body 100 forms the outer shell of the battery pack and protects the components inside the box body 100. The box body 100 may be of a square structure. The box body 100 may be formed by enclosing six plate-like structures.

[0048] In some embodiments, an installation cavity 110 is provided inside the box body 100. The installation cavity 110 may be a square cavity structure.

[0049] In some embodiments, the electric core 200 is disposed in the installation cavity 110. As Figure 5 and Figure 6 shown, the electric core 200 includes an electric core body 210 and an electric core folded edge 220. The electric core folded edge 220 protrudes from the outer side of the electric core body 210. The electric core folded edge is an important structure in a soft-pack battery. The electric core folded edge mainly includes a single-fold edge and a double-fold edge. In battery encapsulation, the single-fold edge is formed by folding the edge of the battery packaging aluminum foil inward once to form a sealing edge. The double-fold edge is formed by folding the aluminum foil edge twice to form a more compact sealing edge structure.

[0050] As Figure 1As shown, in some embodiments, openings 120 are provided at both the top and bottom of the box body 100. The openings 120 communicate with the installation cavity 110. The battery pack further includes a box cover 130. The box cover 130 is disposed on the top of the box body 100 and seals the opening 120 at the top of the box body 100.

[0051] In some embodiments, the liquid cooling plate 300 is disposed in the box body 100 and seals the opening 120. By sealing the opening 120 at the top of the box body 100 with the box cover 130 and the opening 120 at the bottom of the box body 100 with the liquid cooling plate 300, the installation cavity 110 is sealed.

[0052] In some embodiments, the liquid cooling plate 300 and the box body 100 may be an integrally formed structure to improve the sealing performance of the installation cavity 110 and the structural stability between the liquid cooling plate 300 and the box body 100.

[0053] In other embodiments, the liquid cooling plate 300 and the box body 100 may also be connected by welding or bolt connection.

[0054] As Figures 7 to 9 shown, in some embodiments, a plurality of liquid cooling channels 310 protrude from the liquid cooling plate 300. Each liquid cooling channel 310 cools one battery cell body 210. The plurality of liquid cooling channels 310 can cool the plurality of battery cell bodies 210. A liquid cooling medium is disposed in the liquid cooling channels 310.

[0055] As Figures 2 to 4 、 Figure 8 、 Figure 9 shown, in some embodiments, a receiving groove 311 is formed between two adjacent liquid cooling channels 310. The battery cell folded edge 220 is disposed in the receiving groove 311. The battery cell body 210 abuts against the liquid cooling channel 310 so that the heat generated by the battery cell body 210 can be conducted to the liquid cooling medium in the liquid cooling channel 310. The battery cell folded edge 220 protruding from the outside of the battery cell body 210 is disposed in the receiving groove 311, so that the battery cell body 210 can be in direct contact with the liquid cooling channel 310, there is no gap between the battery cell body 210 and the liquid cooling channel 310, and the heat generated by the battery cell body 210 can be directly conducted to the liquid cooling medium in the liquid cooling channel 310, thereby improving the liquid cooling effect of the liquid cooling plate 300, reducing the temperature of the battery cell body 210, and improving the safety of the battery pack.

[0056] In some embodiments, the liquid cooling channels 310 extend along the length direction of the liquid cooling plate 300. As shown in the appendix Figure 7 shown, the length direction of the liquid cooling plate 300 is the X direction. Specifically, the liquid cooling channels 310 are of a linear structure to adapt to the square-shaped battery cell body 210.

[0057] Specifically, a plurality of battery cell bodies 210 are arranged along the width direction of the liquid cooling plate 300. A plurality of liquid cooling channels 310 are arranged at intervals along the width direction of the liquid cooling plate 300, so that the plurality of liquid cooling channels 310 can correspondingly abut against the plurality of battery cell bodies 210. As shown in the appendix Figure 7 shown, the width direction of the liquid cooling channel 310 is the Y direction.

[0058] Specifically, the plurality of liquid cooling channels 310 are equidistantly arranged at intervals along the width direction of the liquid cooling plate 300 to adapt to the plurality of battery cell bodies 210 with equal widths.

[0059] Specifically, the plurality of liquid cooling channels 310 are arranged in parallel with each other.

[0060] As Figure 9 shown, in some embodiments, the liquid cooling plate 300 is provided with a groove 313 along the length direction. A cover plate 312 is covered on the groove 313 to form the liquid cooling channel 310. The battery cell body 210 abuts against the cover plate 312. The cover plate 312 can be used as the cooling surface of the battery cell body 210.

[0061] It should be noted that by providing the groove 313, the volume of each liquid cooling channel 310 can be increased, and each liquid cooling channel 310 can accommodate more liquid cooling medium, thereby improving the cooling effect of the liquid cooling channel 310.

[0062] Specifically, the cover plate 312 protrudes from the surface of the liquid cooling plate 300 facing the battery cell 200. The cover plate 312 can be used as a reinforcing rib of the liquid cooling plate 300 to enhance the structural strength of the liquid cooling plate 300, so that the liquid cooling plate 300 can meet the strength requirements of being the bottom guard plate of the box body 100. The liquid cooling plate 300 is arranged at the bottom of the box body 100 and seals the opening 120 at the bottom of the box body 100. The liquid cooling plate 300 can be used as the bottom guard plate of the box body 100. In this embodiment, the box body 100 does not need to be additionally provided with a bottom guard plate, which can reduce the number of parts of the battery pack and increase the utilization space of the installation cavity 110. That is, a battery cell body 210 with a larger volume can be installed in the box body 100, improving the power and energy density of the battery pack. In addition, this setting can also reduce the weight of the battery pack and the cost of the battery pack.

[0063] Specifically, the cover plate 312 and the liquid cooling plate 300 can be an integrally formed structure to increase the sealing performance of the liquid cooling channel 310 and prevent the liquid cooling medium in the liquid cooling channel 310 from flowing out.

[0064] As Figure 7 shown, in some embodiments, the battery pack further includes a first guide member 400. One end of the first guide member 400 is connected to the external pipeline and a plurality of liquid cooling channels 310, and the liquid cooling medium can flow into the plurality of liquid cooling channels 310 through the external pipeline and the first guide member 400.

[0065] Specifically, the first flow guide member 400 can be arranged along the width direction of the liquid cooling plate 300 and is arranged at one end of the liquid cooling plate 300, so that the first accommodating cavity 420 in the first flow guide member 400 can communicate with a plurality of liquid cooling channels 310. Specifically, the first flow guide member 400 and the liquid cooling plate 300 can be an integrally formed structure.

[0066] As Figure 10 shown, specifically, a first pipe interface 410 and a first accommodating cavity 420 that are connected to each other are arranged in the first flow guide member 400. The first pipe interface 410 is used to connect to an external pipe. The first accommodating cavity 420 communicates with one end of a plurality of liquid cooling channels 310. The liquid cooling medium can enter the plurality of liquid cooling channels 310 through the first pipe interface 410 and the first accommodating cavity 410. The first pipe interface 410 is specifically arranged on one side of the first flow guide member 400.

[0067] Specifically, a first through hole is formed in the side wall of the box body 100 corresponding to the first pipe interface 410. The first through hole connects the first pipe interface 410 with the external pipe, so that the liquid cooling medium in the external pipe can flow into the first pipe interface 410.

[0068] Specifically, a first recess 430 is formed on the side of the first flow guide member 400 facing the liquid cooling plate 300. The first recess 430 is sealingly connected to one end of the cover plate 312, so that the liquid cooling medium in the first accommodating cavity 420 can flow into the liquid cooling channel 310. A plurality of first recesses 430 can be arranged. The plurality of first recesses 430 are correspondingly arranged at one end of the plurality of cover plates 312.

[0069] As Figure 7 shown, in some embodiments, a battery pack further includes a second flow guide member 500. The second flow guide member 500 is connected to the external pipe and communicates with the other end of the liquid cooling channel 310. The liquid cooling medium in the liquid cooling channel 310 can flow into the external pipe through the first flow guide member 400. It should be noted that the liquid cooling medium can circulate through the external pipe, the first flow guide member 400, the liquid cooling channel 310, and the second flow guide member 500.

[0070] Specifically, the first flow guide member 400 and the liquid cooling plate 300 can be an integrally formed structure.

[0071] Specifically, the first flow guide member 400 and the second flow guide member 500 are arranged in parallel at both ends of the liquid cooling plate 300.

[0072] Specifically, the second flow guide member 500 can be arranged along the width direction of the liquid cooling plate 300 and is arranged at the other end of the liquid cooling plate 300, so that the second accommodating cavity in the second flow guide member 500 can communicate with a plurality of liquid cooling channels 310.

[0073] Specifically, a second pipe interface and a second accommodating cavity that are connected and communicate with each other are provided inside the second flow guide member 500. The second pipe interface is used to communicate with an external pipe. The second accommodating cavity communicates with one ends of a plurality of liquid cooling channels 310. The liquid cooling medium of the plurality of liquid cooling channels 310 can enter the external pipe through the second pipe interface and the second accommodating cavity. Specifically, the second pipe interface is provided on one side of the second flow guide member 500.

[0074] Specifically, a second through hole is formed in the side wall of the box body 100 corresponding to the second pipe interface. The second through hole communicates the second pipe interface with the external pipe, so that the liquid cooling medium can flow into the external pipe through the first pipe interface 410.

[0075] Specifically, a second recessed portion (not shown in the figure) is formed on the side of the second flow guide member 500 facing the liquid cooling plate 300. The structure of the second recessed portion is the same as that of the first recessed portion 430. The second recessed portion is hermetically connected to the other end of the cover plate 312, so that the liquid cooling medium in the second accommodating cavity can flow into the liquid cooling channel 310. A plurality of second recessed portions can be provided. The plurality of second recessed portions are correspondingly arranged at the other ends of the plurality of cover plates 312.

[0076] In some embodiments, a condenser is provided on the external pipe. The liquid cooling medium processed by the condenser flows into the liquid cooling channel 310 through the first flow guide member 400. The liquid cooling medium in the liquid cooling channel 310 exchanges heat with the heat generated by the battery cell body 210 to reduce the temperature of the battery cell body 210. The temperature of the liquid cooling medium after heat exchange treatment rises. The liquid cooling medium with the increased temperature flows into the external pipe through the second flow guide member 500 and is condensed by the condenser to reduce the temperature of the liquid cooling medium. The cooled liquid cooling medium flows into the first flow guide member 400 again, and the liquid cooling medium circulates continuously to exchange heat with the battery cell body 210 continuously to reduce the temperature of the battery cell body 210.

[0077] In some embodiments, a circulation pump is provided on the external pipe. The circulation pump is used to drive the liquid cooling medium to circulate in the external pipe, the first flow guide member 400, the liquid cooling channel 310 and the second flow guide member 500.

[0078] As Figure 1 shown, in some embodiments, the battery pack further includes at least two clamping plate assemblies 600. The clamping plate assemblies 600 are arranged at intervals in the installation cavity 110. The clamping plate assemblies 600 can clamp the battery cells 200. Specifically, the clamping plate assemblies 600 can be clamping plates.

[0079] As Figure 11As shown, in some embodiments, the clamping plate assembly 600 includes side plates 610, a first end plate 620, and a second end plate 630. The first end plate 620 is disposed at one end of the side plate 610, and the second end plate 630 is disposed at the other end of the side plate 610. The first end plate 620 and the second end plate 630 are formed by extending from the side plate 610 in the same direction. The first end plate 620 and the second end plate 630 are bent and disposed on the side plate 610. The first end plate 620, the second end plate 630, and the side plate 610 enclose an installation space. The battery cell 200 is adhesively disposed on the side plate 610 and is located in the installation space. Specifically, the battery cell 200 can be disposed on the side plate 610 by means of adhesion.

[0080] As Figure 4 shown, in some embodiments, the first end plate 620 is a heat-conducting structure. The first end plate 620 is disposed in the receiving groove 311 and abuts against the folded edge 220 of the battery cell. The heat of the battery cell body 210 can be conducted to the liquid cooling plate 300 through the folded edge 220 of the battery cell and the first end plate 620. As Figure 4 shown, the first end plate 620 is disposed at the bottom of the side plate 610. Specifically, the material of the first end plate 620 can be aluminum.

[0081] In some embodiments, the side plate 610 is a heat-insulating structure. The heat-insulating side plate 610 can isolate the heat between each battery cell body 210 and reduce the heat transfer between the battery cell bodies 210. If a fire occurs in one of the battery cell bodies 210, the side plate 610 can reduce the influence of the faulty battery cell body 210 on other normal battery cell bodies 210. Specifically, the heat-insulating structure can be aerogel.

[0082] As Figure 11 shown, in some embodiments, the clamping plate assembly 600 further includes a buffer layer 640. The buffer layer 640 is disposed between the battery cell body 210 and the side plate 610, and the buffer layer 640 is used to buffer the acting force between the battery cell body 210 and the side plate 610. Specifically, along the thickness direction of the battery cell body 210, the buffer layer 640 is disposed between the side of the battery cell body 210 facing the side plate 610 and the side of the side plate 610 facing the battery cell body 210. Specifically, the buffer layer 640 can be foam.

[0083] It should be noted that the battery cell body 210 may undergo slight expansion along the thickness direction during operation, causing the battery cell body 210 to squeeze the buffer layer 640. The buffer layer 640 undergoes elastic deformation under the extrusion of the battery cell body 210, playing a buffering role for the battery cell body 210. That is, the buffer layer 640 can provide an expansion space for the battery cell body 210, preventing the battery cell body 210 from squeezing the side plate 610 after expansion and damaging the structure of the battery cell body 210.

[0084] As Figure 11As shown, in some embodiments, an exhaust port 631 is formed in the second end plate 630. The exhaust port 631 communicates the installation space and the installation cavity 110. The gas in the installation space can enter the installation cavity 110 through the exhaust port 631, which can play a role in directional ejection and improve the safety of the battery pack. Specifically, an explosion-proof valve is provided on the box body 100. When the air pressure in the installation cavity 110 reaches the threshold value, the explosion-proof valve can be opened to discharge the gas in the installation cavity 110 to the outside.

[0085] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A battery pack, characterized in that, Comprising: A box body, within which an installation cavity is provided; A battery cell, which is disposed in the installation cavity. The battery cell includes a battery cell body and a battery cell flange, and the battery cell flange protrudes outside the battery cell body; and A liquid cooling plate, which is disposed on the box body. A plurality of liquid cooling channels protrude on the liquid cooling plate, and a liquid cooling medium is accommodated in the liquid cooling channels. A receiving groove is formed between two adjacent liquid cooling channels. The battery cell flange is disposed in the receiving groove, and the battery cell body abuts against the liquid cooling channel.

2. The battery pack according to claim 1, wherein An opening is provided at the bottom inside the box body, and the opening communicates with the installation cavity. The liquid cooling plate seals the opening.

3. The battery pack according to claim 1, wherein The liquid cooling plate is provided with a groove, and a cover plate is provided on the groove to form the liquid cooling channel. The battery cell body abuts against the cover plate.

4. The battery pack according to claim 3, characterized in that, The battery pack further includes a first flow guiding member and a second flow guiding member. The first flow guiding member and the second flow guiding member are used to connect to an external pipeline, and both the first flow guiding member and the second flow guiding member are connected to the liquid cooling channel. The liquid cooling medium can circulate through the external pipeline, the first flow guiding member, the liquid cooling channel, and the second flow guiding member.

5. The battery pack according to claim 4, wherein A first pipe interface and a first accommodation cavity that are connected are provided inside the first flow guiding member. The first pipe interface is used to connect to an external pipeline, and the first accommodation cavity is connected to one end of a plurality of the liquid cooling channels. The liquid cooling medium can enter the plurality of liquid cooling channels through the first pipe interface and the first accommodation cavity; and / or A second pipe interface and a second accommodation cavity that are connected are provided inside the second flow guiding member. The second pipe interface is used to connect to an external pipeline, and the second accommodation cavity is connected to the other end of a plurality of the liquid cooling channels. The liquid cooling medium in the plurality of liquid cooling channels flows into the external pipeline through the second accommodation cavity and the second pipe interface.

6. The battery pack according to claim 5, characterized in that, A first recessed portion is provided on one side of the first flow guiding member facing the liquid cooling plate, and the first recessed portion is hermetically connected to one end of the cover plate, so that the liquid cooling medium in the first accommodation cavity can flow into the liquid cooling channel; and / or A second recessed portion is provided on one side of the second flow guiding member facing the liquid cooling plate, and the second recessed portion is hermetically connected to the other end of the cover plate, so that the liquid cooling medium in the liquid cooling channel can flow into the second accommodation cavity.

7. The battery pack according to claim 1, characterized in that, The battery pack further includes at least two clamping plate assemblies, which are spaced apart and disposed in the installation cavity, and the clamping plate assemblies can clamp the battery cell.

8. The battery pack according to claim 7, wherein The clamping plate assembly includes a side plate, a first end plate, and a second end plate. The first end plate is disposed at one end of the side plate, and the second end plate is disposed at the other end of the side plate. The first end plate and the second end plate are formed by the side plate extending in the same direction. The first end plate, the second end plate, and the side plate enclose an installation space, and the battery cell is disposed in a fitting manner on the side plate and is located in the installation space.

9. The battery pack according to claim 8, wherein The first end plate is a heat conducting structure. The first end plate is disposed in the receiving groove and abuts against the battery cell flange. The heat of the battery cell body can be conducted to the liquid cooling plate through the battery cell flange and the first end plate.

10. The battery pack according to claim 8, wherein, The clamping plate assembly further includes a buffer layer, the buffer layer is disposed between the battery cell body and the side plate, and the buffer layer is used for buffering the acting force between the battery cell body and the side plate.

11. The battery pack according to claim 8, characterized in that, An exhaust port is formed on the second end plate, the exhaust port communicates with the installation space and the installation cavity, and the gas in the installation space can enter the installation cavity through the exhaust port.

12. The battery pack according to claim 8, wherein, The side plate is a heat insulation plate.

Images