Battery pack

Abstract

The utility model provides a battery pack, which comprises at least one battery pack, an integrated busbar and a first liquid cooling plate, the battery pack comprises a plurality of batteries, and the output ends of the plurality of batteries are positioned on the same side of the battery pack; the integrated busbar comprises at least one connecting piece, and the connecting piece is connected with the output ends of two adjacent batteries in the battery pack; the first liquid cooling plate is arranged on one side, deviating from the battery pack, of the connector; wherein the first liquid cooling plate is internally provided with a first liquid cooling flow channel, and the first liquid cooling flow channel is arranged opposite to the connecting piece; in the embodiment of the utility model, the first liquid cooling plate opposite to the output end of the battery is arranged in the battery pack, so that the first liquid cooling runner positioned in the first liquid cooling plate can perform heat dissipation on the connecting piece connected with the output end of the battery, and therefore, when the battery pack is in a quick charging working condition, heat dissipation and cooling on the connecting piece can be realized; therefore, the influence of heating of the connecting piece on the battery pack is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, concretely relates to a battery pack. BACKGROUND

[0002] In the related art, the battery pack uses a liquid cooling plate for heat dissipation and cooling, and the liquid cooling plate is usually arranged at the bottom of the battery pack. When the battery pack is in a fast charging condition, the aluminum bars connected to the batteries in the battery pack will generate a large amount of heat, and the liquid cooling plate arranged at the bottom of the battery pack cannot effectively dissipate and cool the aluminum bars. SUMMARY

[0003] The embodiments of the utility model provide a battery pack, which can solve the technical problem that the aluminum bars cannot be effectively cooled when the battery pack is in a fast charging condition.

[0004] In a first aspect, the embodiments of the utility model provide a battery pack, which comprises:

[0005] At least one battery pack comprising a plurality of batteries, the output ends of the plurality of batteries being located on the same side of the battery pack;

[0006] An integrated busbar comprising at least one connecting piece, the connecting piece connecting the output ends of two adjacent batteries in the battery pack; and

[0007] A first liquid cooling plate arranged on the side of the connecting piece away from the battery pack;

[0008] The first liquid cooling plate is provided with a first liquid cooling flow channel, and the first liquid cooling flow channel is arranged opposite to the connecting piece.

[0009] In an embodiment, the plurality of batteries in one battery pack are arranged along a first direction, and the output ends of the plurality of batteries are located on one side of the battery pack in a second direction, the second direction intersecting the first direction;

[0010] The integrated busbar comprises a connecting piece group, the connecting piece group comprising a plurality of connecting pieces arranged along the first direction, the connecting pieces being located on one side of the battery pack in the second direction and connecting the output ends of two adjacent batteries;

[0011] The first liquid cooling flow channel comprises at least one first flow channel, the first flow channel extending along the first direction and being arranged on the side of the connecting piece group away from the battery pack.

[0012] In an embodiment, the first flow channel comprises at least two first sub-flow channels, the first sub-flow channels extending along the first direction, and two adjacent first sub-flow channels being arranged apart in a third direction, the third direction being perpendicular to the first direction and the second direction.

[0013] In an embodiment, the first flow channel further comprises at least a second sub-flow channel, the second sub-flow channel is arranged between and in communication with two adjacent first sub-flow channels.

[0014] In an embodiment, a size of the first flow channel in a third direction is defined as L, the third direction is perpendicular to the first direction and the second direction; wherein L satisfies: 50mm≤L≤70mm.

[0015] In an embodiment, the battery pack further comprises a second liquid cooling plate, the second liquid cooling plate is arranged on a side of the battery pack away from the first liquid cooling plate in the second direction.

[0016] In an embodiment, the battery pack further comprises at least two third liquid cooling plates, the third liquid cooling plates extend along the first direction, two third liquid cooling plates are arranged on two sides of the battery pack in a third direction, the third direction is perpendicular to the first direction and the second direction.

[0017] In an embodiment, a plurality of battery groups are arranged in the third direction.

[0018] Wherein, one battery group is arranged between two adjacent third liquid cooling plates.

[0019] In an embodiment, two adjacent third liquid cooling plates are in communication with each other.

[0020] In an embodiment, the battery pack further comprises:

[0021] a second liquid cooling plate arranged on a side of the battery pack away from the first liquid cooling plate in the second direction; and

[0022] at least two third liquid cooling plates, the third liquid cooling plates extend along the first direction, two third liquid cooling plates are arranged on two sides of the battery pack in a third direction, the third direction is perpendicular to the first direction and the second direction.

[0023] In an embodiment, the first liquid cooling plate comprises a first liquid inlet end and a first liquid outlet end in communication with the first liquid cooling flow channel;

[0024] The second liquid cooling plate is provided with a second liquid cooling flow channel, the second liquid cooling plate comprises a second liquid inlet end and a second liquid outlet end in communication with the second liquid cooling flow channel;

[0025] Wherein, the first liquid inlet end, the second liquid outlet end, the second liquid inlet end and the second liquid outlet end are located on the same side of the battery group in the first direction.

[0026] In an embodiment, the third liquid cooling plate is provided with a third liquid cooling flow channel, the third liquid cooling plate comprises a third liquid inlet end and a third liquid outlet end in communication with the third liquid cooling flow channel;

[0027] The third liquid inlet end and the third liquid outlet end are located on a side of the battery pack away from the first liquid inlet end in the first direction.

[0028] In an embodiment, the battery further comprises a pressure relief valve, the pressure relief valve of the battery is located on the same side of the battery as the output end of the battery.

[0029] The first liquid cooling plate is provided with a slot at a position opposite the pressure relief valve of the battery.

[0030] The embodiment of the utility model has the advantages of:

[0031] In the embodiment of the utility model, by setting the first liquid cooling plate opposite the output end of the battery in the battery pack, the first liquid cooling channel in the first liquid cooling plate can cool the connecting piece connected to the output end of the battery, so that the connecting piece can be cooled in the fast charging condition of the battery pack, thereby reducing the influence of the heat of the connecting piece on the battery pack. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the drawings needed in the embodiment description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0033] Figure 1 It is the three-dimensional schematic view of the battery pack provided by the embodiment of the utility model;

[0034] Figure 2 It is the three-dimensional schematic view of the battery pack provided by the embodiment of the utility model;

[0035] Figure 3 It is the cross-sectional view of the first liquid cooling plate provided by the embodiment of the utility model;

[0036] Figure 4 It is the three-dimensional schematic view of the battery pack from another perspective provided by the embodiment of the utility model;

[0037] Figure 5 It is the three-dimensional schematic view of the battery pack from another perspective provided by the embodiment of the utility model;

[0038] Figure 6 It is the cross-sectional view of the second liquid cooling plate provided by the embodiment of the utility model;

[0039] Figure 7 It is the cross-sectional view of the third liquid cooling plate provided by the embodiment of the utility model;

[0040] Figure 8It is the explosion schematic diagram of the battery pack provided by the embodiment of the utility model.

[0041] Mark explanation:

[0042] 1, battery pack; 11, battery; 110, output end; 111, pressure relief valve; 2, integrated busbar; 21, connecting piece group; 211, connecting piece; 3, first liquid cooling plate; 31, first liquid cooling channel; 32, first liquid inlet; 33, first liquid outlet; 311, first channel; 3111, first sub channel; 3112, second sub channel; 4, second liquid cooling plate; 41, second liquid cooling channel; 411, third sub channel; 42, second liquid inlet; 43, second liquid outlet; 5, third liquid cooling plate; 501, liquid cooling plate body; 502, plugging part; 503, connecting part; 51, third liquid cooling channel; 511, liquid inlet channel; 5111, liquid inlet sub channel; 512, liquid outlet channel; 5121, liquid outlet sub channel; 513, first cavity; 514, second cavity; 515, third cavity; 52, third liquid inlet; 53, third liquid outlet; 6, slotted; 7, liquid inlet pipe section; 8, liquid outlet pipe section; 9, cover plate; 10, bottom plate; 12, side plate; 13, end plate; 14, heat preservation piece. Specific implementation

[0043] The technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model. In addition, it should be understood that the specific implementation described herein is only used to illustrate and explain the utility model, and is not used to limit the utility model. In the utility model, the orientation words such as 'up' and 'down' generally refer to the up and down of the device in the actual use or working state, and the specific direction of the drawing in the drawing; and 'inner' and 'outer' are relative to the outline of the device.

[0044] The application provides a battery pack, Figures 1 to 8 for some embodiments of the application. Among them, as shown in the direction mark in the drawing, the X direction in the drawing is the first direction, the Y direction is the third direction, and the Z direction is the second direction, the first direction and the second direction intersect, and the first direction and the second direction are perpendicular to the third direction; For the convenience of understanding, the first direction X, the second direction Z and the third direction Y are described in the following.

[0045] Please refer to Figures 1 to 2In some embodiments of the present application, the battery pack comprises at least one battery group 1 and an integrated busbar 2, the battery group 1 comprises a plurality of batteries 11, and the output ends 110 of the plurality of batteries 11 are located on the same side of the battery group 1; the integrated busbar 2 comprises at least one connecting piece 211, and the connecting piece 211 connects the output ends 110 of two adjacent batteries 11 in the battery group 1; that is, in this embodiment, the connecting piece 211 connects the output ends 110 of two adjacent batteries 11 to realize electrical connection between the two adjacent batteries 11, and the connecting piece 211 will be in a serious heating condition when the battery pack is in a fast charging working condition.

[0046] In some embodiments of the present application, the battery pack comprises a first liquid cooling plate 3, and the first liquid cooling plate 3 is arranged on the side of the connecting piece 211 away from the battery group 1; wherein the first liquid cooling plate 3 is provided with a first liquid cooling flow channel 31, and the first liquid cooling flow channel 31 is arranged opposite to the connecting piece 211; that is, the first liquid cooling flow channel 31 on the first liquid cooling plate 3 can cool and heat dissipate the connecting piece 211.

[0047] In the technical solution of the present application, by arranging the first liquid cooling plate 3 opposite to the output end 110 of the battery 11 in the battery pack, the first liquid cooling flow channel 31 in the first liquid cooling plate 3 can cool and heat dissipate the connecting piece 211 connecting the output end 110 of the battery 11, so that the heat dissipation of the connecting piece 211 can be realized when the battery pack is in a fast charging working condition, thereby reducing the influence of the heating of the connecting piece 211 on the battery pack.

[0048] Wherein, the arrangement mode of the plurality of batteries 11 in the battery group 1 can be that the plurality of batteries 11 are arranged in a single direction, such as the plurality of batteries 11 are arranged in the first direction X or the plurality of batteries 11 are arranged in the third direction Y; or the plurality of batteries 11 can be arranged in an array on a certain plane, such as the plurality of batteries 11 are arranged in an array on the plane of the first direction X and the third direction Y.

[0049] It should be noted that the arrangement mode of the plurality of batteries 11 in the battery group 1 is not limited, as long as the first liquid cooling flow channel 31 on the first liquid cooling plate 3 is opposite to the connecting piece 211 and can cool and heat dissipate the connecting piece 211 after the first liquid cooling plate 3 is assembled with the battery group 1.

[0050] And the first liquid cooling flow channel 31 can also cool and heat dissipate the battery 11 while cooling and heat dissipating the connecting piece 211.

[0051] In some embodiments of the present application, the plurality of batteries 11 in one battery group 1 are arranged in the first direction X, and the output ends 110 of the plurality of batteries 11 are located on one side of the battery group 1 in the second direction Z; wherein each battery 11 comprises two output ends 110, one of which is a positive output end and the other is a negative output end.

[0052] The integrated busbar 2 comprises a connector group 21, the connector group 21 comprises a plurality of connectors 211 arranged in the first direction X, the connectors 211 are located on one side of the battery pack 1 in the second direction Z and connect the output terminals 110 of two adjacent batteries 11; that is, the connectors 211 can connect the positive output terminals and the negative output terminals of two adjacent batteries 11.

[0053] It can be understood that although the plurality of batteries 11 are arranged in the first direction X, the two output terminals 110 located on one battery 11 can be arranged at intervals in the first direction X or can be arranged at intervals in the third direction Y. Please refer to Figure 2 In some embodiments of the present application, the two output terminals 110 located on one battery 11 are arranged at intervals in the third direction Y.

[0054] In some embodiments of the present application, the first liquid cooling channel 31 comprises at least one first channel 311, the first channel 311 extends in the first direction X and is arranged on the side of the connector group 21 away from the battery pack 1; wherein the extension direction of the first channel 311 is the same as the arrangement direction of the plurality of batteries 11 in the battery pack 1, so that the first channel 311 can simultaneously cool the plurality of connectors 211 connecting the plurality of batteries 11 in the battery pack 1, thereby improving the heat dissipation efficiency of the first channel 311.

[0055] Among them, the first liquid cooling plate 3 is located on one side of the battery pack 1 in the second direction Z.

[0056] Please refer to Figures 1 to 3 In some embodiments of the present application, the first channel 311 comprises at least two first sub-channels 3111, the first sub-channels 3111 extend in the first direction X, and adjacent two first sub-channels 3111 are arranged at intervals in the third direction Y; such arrangement is because the size of the connector 211 in the third direction Y is large, and the size of the first channel 311 in the third direction Y needs to match the size of the connector 211 in the third direction Y, thereby cooling the connector 211; arranging the first channel 311 into at least two first sub-channels 3111 can enhance the structural strength of the first liquid cooling plate 3, thereby reducing the risk of deformation of the first liquid cooling plate 3 at the first channel 311.

[0057] Among them, the number of first sub-channels 3111 can be two, three or more, which is not limited here.

[0058] In addition, adjacent two first sub-channels 3111 in the third direction Y can be connected to each other or can not be connected to each other.

[0059] In some embodiments of the present application, the first flow channel 311 further comprises at least one second sub-flow channel 3112, which is arranged between and in communication with two adjacent first sub-flow channels 3111; in this way, the contact area between the first flow channel 311 and the connecting piece 211 is increased while ensuring the structural strength of the first liquid cooling plate 3, so as to increase the size of the first flow channel 311 and reduce the flow resistance of the cooling liquid in the first flow channel 311, thereby improving the heat dissipation efficiency of the connecting piece 211.

[0060] In some embodiments of the present application, one first flow channel 311 comprises two first sub-flow channels 3111, which are on the same side of the first direction X as the liquid inlet side, and on the other side of the first direction X as the liquid outlet side; in this way, the cooling liquid can flow in the first flow channel 311.

[0061] Please refer to Figure 3 In some embodiments of the present application, the size of the first flow channel 311 in the third direction Y is defined as L; wherein L satisfies: 50mm≤L≤70mm; setting the value of L in this interval range can ensure the heat dissipation efficiency of the connecting piece 211 by the first liquid cooling plate 3. If L is less than 50mm, the first flow channel 311 may not completely cover the connecting piece 211 in the third direction Y, which may result in poor heat dissipation efficiency of the connecting piece 211 by the first liquid cooling plate 3; if L is greater than 70mm, the structural strength of the first liquid cooling plate 3 may be too weak.

[0062] The value of L can be 50mm, 50.5mm, 51mm, 51.5mm, 52mm, 52.5mm, 53mm, 53.5mm, 54mm, 54.5mm, 55mm, 55.5mm, 56mm, 56.5mm, 57mm, 57.5mm, 58mm, 58.5mm, 59mm, 59.5mm, 60mm, 60.5mm, 61mm, 61.5mm, 62mm, 62.5mm, 63mm, 63.5mm, 64mm, 64.5mm, 65mm, 65.5mm, 66mm, 66.5mm, 67mm, 67.5mm, 68mm, 68.5mm, 69mm, 69.5mm, 70mm. The value of L is not limited to the listed values, and other values not listed in this range are also applicable.

[0063] In some embodiments of the present application, the battery pack further comprises a second liquid cooling plate 4, which is arranged on the side of the battery group 1 away from the first liquid cooling plate 3 in the second direction Z; that is, in this embodiment, the structure of the first liquid cooling plate 3 and the second liquid cooling plate 4 is arranged so that the two sides of the battery group 1 in the second direction Z can be cooled at the same time, so as to avoid the temperature of the battery 11 in the battery group 1 and the temperature of the connecting piece 211 being too high during use of the battery pack.

[0064] It can be understood that, on the basis of the embodiments of the battery pack comprising the first liquid cooling plate 3 and the second liquid cooling plate 4 in the present application, the first liquid cooling plate 3 and the second liquid cooling plate 4 can be in communication with each other or not in communication with each other. This is not limited.

[0065] In some embodiments of the present application, the battery pack further comprises at least two third liquid cooling plates 5, which extend along the first direction X, and the two third liquid cooling plates 5 are arranged on the two sides of the battery group 1 in the third direction Y; in this embodiment, the structure of the first liquid cooling plate 3 and the third liquid cooling plate 5 is arranged so that the one side of the battery group 1 in the second direction Z and the two sides of the battery group 1 in the third direction Y can be cooled at the same time, so as to avoid the temperature of the battery 11 in the battery group 1 and the temperature of the connecting piece 211 being too high during use of the battery pack.

[0066] It can be understood that, on the basis of the embodiments of the battery pack comprising the first liquid cooling plate 3 and the at least two third liquid cooling plates 5 in the present application, the first liquid cooling plate 3 and the at least two third liquid cooling plates 5 can not be in communication with each other; or the first liquid cooling plate 3 and the at least two third liquid cooling plates 5 can be partially in communication, such as the first liquid cooling plate 3 being in communication with one of the two third liquid cooling plates 5, or the two third liquid cooling plates 5 being in communication with each other and not in communication with the first liquid cooling plate 3; or the first liquid cooling plate 3 and the at least two third liquid cooling plates 5 can be in communication with each other. This is not limited.

[0067] In some embodiments of the present application, a plurality of battery groups 1 are arranged, and the plurality of battery groups 1 are arranged in the third direction Y; wherein one battery group 1 is arranged between two adjacent third liquid cooling plates 5; in this way, the two sides of one battery group 1 in the third direction Y are both cooled by two third liquid cooling plates 5, so as to improve the cooling efficiency of each battery group 1 in the battery pack.

[0068] Among them, since the battery group 1 is arranged in a plurality, a plurality of first liquid cooling channels 31 are arranged on the first liquid cooling plate 3, and the plurality of first liquid cooling channels 31 are arranged in the third direction Y to correspond to the connecting piece group 21 in each battery group 1, so as to ensure that the plurality of connecting pieces 211 in the battery pack can be cooled.

[0069] In some embodiments of the present application, two adjacent first liquid cooling channels 31 are in communication with each other.

[0070] In some embodiments of the present application, the battery pack further comprises a second liquid cooling plate 4 and at least two third liquid cooling plates 5, the second liquid cooling plate 4 is arranged on the side of the battery group 1 away from the first liquid cooling plate 3 in the second direction Z; the third liquid cooling plate 5 extends along the first direction X, and two third liquid cooling plates 5 are arranged on the two sides of the battery group 1 in the third direction Y respectively; in this embodiment, through the structural arrangement of the first liquid cooling plate 3, the second liquid cooling plate 4 and the third liquid cooling plate 5, the heat dissipation of the two sides of the battery group 1 in the second direction Z and the two sides of the battery group 1 in the third direction Y can be realized at the same time, so as to avoid the temperature of the battery 11 in the battery group 1 and the temperature of the connecting piece 211 being too high during use of the battery pack.

[0071] It can be understood that, on the basis of the embodiments of the battery pack comprising the first liquid cooling plate 3, the second liquid cooling plate 4 and the at least two third liquid cooling plates 5 in the present application, the first liquid cooling plate 3, the second liquid cooling plate 4 and the at least two third liquid cooling plates 5 can be not in communication with each other; or some of the first liquid cooling plate 3, the second liquid cooling plate 4 and the at least two third liquid cooling plates 5 are in communication, such as the first liquid cooling plate 3 and the second liquid cooling plate 4 are in communication, or the two third liquid cooling plates 5 are in communication with each other and not in communication with the first liquid cooling plate 3 and the second liquid cooling plate 4; or all of the first liquid cooling plate 3, the second liquid cooling plate 4 and the at least two third liquid cooling plates 5 are in communication. This is not limited here.

[0072] In some embodiments of the present application, a plurality of battery groups 1 are arranged, and the plurality of battery groups 1 are arranged in the third direction Y; wherein one battery group 1 is arranged between two adjacent third liquid cooling plates 5; in this way, the two third liquid cooling plates 5 are arranged on the two sides of one battery group 1 in the third direction Y to dissipate heat of the battery group 1, so as to improve the heat dissipation efficiency of each battery group 1 in the battery pack.

[0073] Among them, since the battery group 1 is arranged in a plurality, a plurality of first liquid cooling channels 31 are arranged on the first liquid cooling plate 3, and the plurality of first liquid cooling channels 31 are arranged in the third direction Y to correspond to the connecting piece group 21 in each battery group 1, so as to ensure that the plurality of connecting pieces 211 in the battery pack can be cooled.

[0074] In some embodiments of the present application, two adjacent first liquid cooling channels 31 are in communication with each other.

[0075] Please refer to Figure 4In some embodiments of the present application, two adjacent third liquid cooling plates 5 are in communication with each other; in this way, the circulation of the cooling liquid on the plurality of third liquid cooling plates 5 can be completed by providing one liquid inlet end and one liquid outlet end between the plurality of third liquid cooling plates 5, thereby reducing the number of components in the battery pack.

[0076] Please refer to Figure 5 In some embodiments of the present application, the first liquid cooling plate 3 comprises a first liquid inlet end 32 and a first liquid outlet end 33 in communication with the first liquid cooling channel 31; the second liquid cooling plate 4 is provided with a second liquid cooling channel 41, and the second liquid cooling plate 4 comprises a second liquid inlet end 42 and a second liquid outlet end 43 in communication with the second liquid cooling channel 41; wherein the first liquid inlet end 32, the first liquid outlet end 33, the second liquid inlet end 42 and the second liquid outlet end 43 are located on the same side of the battery pack 1 in the first direction X; in this way, the pipelines in communication with the first liquid inlet end 32, the second liquid outlet end 43, the second liquid inlet end 42 and the second liquid outlet end 43 are located on the same side of the battery pack, thereby reducing the length of the pipelines in communication with the first liquid inlet end 32, the second liquid outlet end 43, the second liquid inlet end 42 and the second liquid outlet end 43.

[0077] Wherein, the positions of the first liquid inlet end 32 and the first liquid outlet end 33 can be interchanged on the first liquid cooling plate 3, and the positions of the second liquid inlet end 42 and the second liquid outlet end 43 can be interchanged on the second liquid cooling plate 4.

[0078] The first liquid inlet end 32 and the first liquid outlet end 33 are in communication with the plurality of first flow channels 311.

[0079] In some embodiments of the present application, the third liquid cooling plate 5 is provided with a third liquid cooling channel 51, and the third liquid cooling plate 5 comprises a third liquid inlet end 52 and a third liquid outlet end 53 in communication with the third liquid cooling channel 51; the third liquid inlet end 52 and the third liquid outlet end 53 are located on the side of the battery pack 1 in the first direction X away from the first liquid inlet end 32; in this way, the first liquid inlet end 32, the second liquid outlet end 43 on the first liquid cooling plate 3 and the second liquid inlet end 42, the second liquid outlet end 43 of the second liquid cooling plate 4 are opposite to the third liquid inlet end 52, the third liquid outlet end 53 of the third liquid cooling plate 5 in the first direction X, thereby improving the temperature uniformity of the battery pack.

[0080] Wherein, the positions of the third liquid inlet end 52 and the third liquid outlet end 53 can be interchanged on the third liquid cooling plate 5.

[0081] In some embodiments of the present application, the battery 11 further comprises a pressure relief valve 111, the pressure relief valve 111 of the battery 11 is located on the same side of the battery 11 as the output end 110 of the battery 11; the first liquid cooling plate 3 is provided with a slot 6 at a position opposite to the pressure relief valve 111 of the battery 11; in this embodiment, the slot 6 is provided to avoid the structure of the first liquid cooling plate 3 interfering with the pressure relief of the battery 11, and also to reduce the weight of the first liquid cooling plate 3.

[0082] Referring to Figure 6 In some embodiments of the present application, the second liquid cooling flow channel 41 comprises a plurality of third sub-flow channels 411 spaced apart in the third direction Y, the third sub-flow channels 411 extend along the first direction X, and adjacent two third sub-flow channels 411 communicate with each other; wherein the plurality of third sub-flow channels 411 all communicate with the second liquid inlet end 42 and the second liquid outlet end 43 to realize the circulation of the cooling liquid in the second liquid cooling plate 4, and also effectively reduce the temperature difference between the plurality of batteries 11.

[0083] Referring to Figure 7 In some embodiments of the present application, the third liquid cooling flow channel 51 in the third liquid cooling plate 5 comprises a liquid inlet flow channel 511 and a liquid outlet flow channel 512 spaced apart in the second direction Z, and a first cavity 513 communicating the liquid inlet flow channel 511 and the liquid outlet flow channel 512, the liquid inlet flow channel 511 and the liquid outlet flow channel 512 both extend along the first direction X, and at least part of the orthographic projection of the liquid inlet flow channel 511 and the liquid outlet flow channel 512 in the second direction Y falls on the battery 11; that is, in this embodiment, the liquid inlet flow channel 511 and the liquid outlet flow channel 512 are arranged to enable the cooling liquid to flow through each battery 11 in the battery pack 1 twice, thereby improving the cooling effect on the plurality of batteries 11 in the battery pack 1.

[0084] Wherein the third liquid inlet end 52 communicates the liquid inlet flow channel 511, and the third liquid outlet end 53 communicates the liquid outlet flow channel 512, and in the third liquid cooling plate 5, the flow path of the cooling liquid is as follows: third liquid inlet end 52-liquid inlet flow channel 511-first cavity 513-liquid outlet flow channel 512-third liquid outlet end 53.

[0085] It should be noted that the specific flow channel form of the liquid inlet flow channel 511 and the liquid outlet flow channel 512 is not limited, which can be formed as one flow channel or a plurality of sub-flow channels; in an embodiment of the present application, the liquid inlet flow channel 511 comprises a plurality of liquid inlet sub-flow channels 5111 arranged in parallel in the second direction Z, and the liquid outlet flow channel 512 comprises a plurality of liquid outlet sub-flow channels 5121 arranged in parallel in the second direction Z, and the number of the liquid inlet sub-flow channels 5111 and the liquid outlet sub-flow channels 5121 is not limited, which can be adjusted according to the height of the actual third liquid cooling plate 5 in the second direction Z.

[0086] In some embodiments of the present application, the third liquid cooling plate 5 comprises a liquid cooling plate body 501, a blocking part 502 and a connecting part 503, the liquid cooling plate body 501 extends along the first direction X, the blocking part 502 and the connecting part 503 are respectively arranged at opposite ends of the liquid cooling plate body 501 in the first direction X, the liquid inlet flow channel 511 and the liquid outlet flow channel 512 are arranged in the liquid cooling plate body 501, the first cavity 513 is arranged in the blocking part 502, the second cavity 514 and the third cavity 515 are arranged in the connecting part 503, the second cavity 514 is in communication with the third liquid inlet end 52, and the third cavity 515 is in communication with the third liquid outlet end 53.

[0087] In some embodiments of the present application, the battery pack further comprises a plurality of liquid inlet pipe sections 7 and a plurality of liquid outlet pipe sections 8, the liquid inlet pipe sections 7 are in communication with the third liquid inlet ends 52 of two adjacent third liquid cooling plates 5, and the liquid outlet pipe sections 8 are in communication with the third liquid outlet ends 53 of two adjacent third liquid cooling plates 5, so as to realize the communication between the plurality of third liquid cooling plates 5.

[0088] Please refer to Figure 8 In some embodiments of the present application, the cover plate 9 is arranged on the side of the first liquid cooling plate 3 away from the battery pack 1, the side plate 12 is arranged on the side of the second liquid cooling plate 4 away from the battery pack 1, the bottom plate 10 is arranged on the side of the third liquid cooling plate 5 away from the battery pack 1, and the end plate 13 is arranged on the opposite sides of the battery pack 1 in the first direction X, so as to protect the plurality of batteries 11 in the battery pack.

[0089] In some embodiments of the present application, the battery pack further comprises a heat preservation member 14, which can achieve good heat preservation and heat insulation effects on the batteries 11. In an embodiment, the heat preservation member 14 is arranged on the two sides of the battery pack 1 in the first direction X; in another embodiment, the heat preservation member 14 is arranged between the third liquid cooling plate 5 and the bottom plate 10; in still another embodiment, the heat preservation member 14 is arranged between the second liquid cooling plate 4 and the side plate 12.

[0090] In some embodiments of the present application, the heat preservation member 14 arranged on the two sides of the battery pack 1 in the first direction X is a plastic heat insulation sheet, the heat preservation member 14 arranged between the third liquid cooling plate 5 and the bottom plate 10 is foam, and the heat preservation member 14 arranged between the second liquid cooling plate 4 and the side plate 12 is foaming glue.

[0091] The embodiments of the present application are described in detail above, and the principle and implementation mode of the present application are described by applying specific examples; the above embodiment description is only used to help understand the method and core idea of the present application; meanwhile, for those skilled in the art, the specific implementation mode and application range will be changed according to the idea of the present application, and the content of the specification should not be understood as a limitation of the present application.

Claims

1. A battery pack, characterized in that: include: at least one battery pack comprising a plurality of batteries, wherein output terminals of the plurality of batteries are located on a same side of the battery pack; An integrated busbar, comprising at least one connector, the connector connecting output terminals of two adjacent batteries in the battery pack; and a first liquid cooling plate, disposed on a side of the connecting member facing away from the battery pack; Wherein, a first liquid cooling channel is provided in the first liquid cooling plate, and the first liquid cooling channel is arranged opposite to the connecting member.

2. The battery pack according to claim 1, wherein: The plurality of batteries in one battery pack are arranged along a first direction, and the output ends of the plurality of batteries are all located on one side of the battery pack in a second direction, where the second direction intersects the first direction; The integrated busbar includes a connector group, the connector group includes a plurality of connectors arranged along the first direction, the connector is located on one side of the battery group in the second direction and connects the output ends of two adjacent batteries; The first liquid-cooling channel includes at least one first channel, which extends along the first direction and is disposed on a side of the connector assembly facing away from the battery assembly.

3. The battery pack according to claim 2, wherein: The first flow channel includes at least two first sub-flow channels, the first sub-flow channels extend along the first direction, and two adjacent first sub-flow channels are spaced apart in a third direction, which is perpendicular to the first direction and the second direction.

4. The battery pack according to claim 3, wherein: The first flow channel further includes at least one second sub-flow channel, and the second sub-flow channel is arranged between two adjacent first sub-flow channels and communicates with the two adjacent first sub-flow channels.

5. The battery pack according to claim 2, wherein: The dimension of the first flow channel in the third direction is defined as L, and the third direction is perpendicular to the first direction and the second direction; wherein L satisfies: 50 mm ≤ L ≤ 70 mm.

6. The battery pack according to claim 2, characterized in that: The battery pack further includes a second liquid cooling plate, which is disposed on a side of the battery pack facing away from the first liquid cooling plate in the second direction.

7. The battery pack according to claim 2, characterized in that: The battery pack further includes at least two third liquid cooling plates, which extend along the first direction. The two third liquid cooling plates are respectively arranged on both sides of the battery pack in a third direction, and the third direction is perpendicular to the first direction and the second direction.

8. The battery pack according to claim 7, characterized in that: There are multiple battery packs, and the multiple battery packs are arranged in the third direction; Wherein, one battery pack is arranged between two adjacent third liquid cooling plates.

9. The battery pack according to claim 8, characterized in that: Two adjacent third liquid cooling plates are connected to each other.

10. The battery pack according to claim 2, wherein: The battery pack further includes: a second liquid cooling plate, disposed on a side of the battery pack facing away from the first liquid cooling plate in the second direction; and At least two third liquid cooling plates extend along the first direction, and the two third liquid cooling plates are respectively arranged on both sides of the battery pack in a third direction, and the third direction is perpendicular to the first direction and the second direction.

11. The battery pack according to claim 10, characterized in that: The first liquid cooling plate includes a first liquid inlet end and a first liquid outlet end connected to the first liquid cooling channel; A second liquid cooling channel is provided in the second liquid cooling plate, and the second liquid cooling plate includes a second liquid inlet end and a second liquid outlet end connected to the second liquid cooling channel; The first liquid inlet, the second liquid outlet, the second liquid inlet and the second liquid outlet are all located on the same side of the battery pack in the first direction.

12. The battery pack according to claim 11, wherein: A third liquid cooling channel is provided in the third liquid cooling plate, and the third liquid cooling plate includes a third liquid inlet and a third liquid outlet connected to the third liquid cooling channel; The third liquid inlet and the third liquid outlet are located on a side of the battery pack that is away from the first liquid inlet in the first direction.

13. The battery pack according to any one of claims 1 to 12, characterized in that: The battery further includes a pressure relief valve, wherein the pressure relief valve and the output terminal of the battery are located on the same side of the battery; The first liquid cooling plate is provided with a slot at a position opposite to the pressure relief valve of the battery.

Images