Battery pack and vehicle

Abstract

The present disclosure relates to a battery pack and a vehicle, and belongs to the technical field of batteries. The battery pack and the vehicle comprise a mounting shell, a water-cooling base plate, a plurality of electrical connectors and a plurality of battery cells mounted in the mounting shell. The water-cooling base plate has a water inlet, a water outlet and a flow channel arranged in the water-cooling base plate. The flow channel is in communication with the water inlet and the water outlet. Each electrical connector is attached to the surface of the water-cooling base plate through a first insulating and heat-conducting layer. The plurality of electrical connectors are arranged at intervals. The electrical connectors are used for electrical connection in the battery pack. The battery pack and the vehicle of the present disclosure can provide sufficient heat dissipation for the electrical connectors between the battery cells.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of batteries, in particular to a battery pack and a vehicle. BACKGROUND

[0002] As an efficient heat dissipation solution, the liquid cooling solution is often used in the battery system of an electric vehicle. The core component of the liquid cooling solution is a water-cooling plate. The water-cooling plate is often arranged at the bottom or top of the power battery, and the power battery transmits the excess heat generated during work to the cooling liquid in the flow channel inside the water-cooling plate through the contact with the surface of the water-cooling plate, and finally the cooling liquid takes away the heat to achieve the heat dissipation of the battery. The electric connection elements between the plurality of single cells in the power battery pack of the electric vehicle are often difficult to be sufficiently cooled, and the temperature is easy to rise, thereby causing large energy loss and reduced electrical conductivity. SUMMARY

[0003] In view of this, the battery pack and the vehicle provided by the embodiments of the present disclosure can sufficiently cool the electric connection elements between the plurality of single cells. The technical solution is as follows.

[0004] In a first aspect, a battery pack is provided, the battery pack comprising a mounting shell, a water-cooling substrate, a plurality of electric connection elements and a plurality of single cells mounted in the mounting shell;

[0005] The water-cooling substrate has a water inlet, a water outlet and a flow channel arranged inside the water-cooling substrate, and the flow channel is in communication with the water inlet and the water outlet.

[0006] The electric connection elements are attached to the surface of the water-cooling substrate through a first insulating and heat-conducting layer, the plurality of electric connection elements are arranged at intervals, and the electric connection elements are used for electrical connection in the battery pack.

[0007] In a possible implementation, the battery pack further comprises a second insulating and heat-conducting layer, the plurality of single cells are arranged on the surface of the water-cooling substrate, and the second insulating and heat-conducting layer is located between the single cells and the water-cooling substrate.

[0008] In a possible implementation, the second insulating and heat-conducting layer is a first heat-conducting structural adhesive, and the single cells and the water-cooling substrate are fixedly connected through the first heat-conducting structural adhesive.

[0009] In a possible implementation, the electric connection elements are located between the single cells and the water-cooling substrate.

[0010] In a possible implementation, the surface of the water-cooling substrate has a plurality of embedded grooves arranged at intervals, the shape of the embedded grooves is matched with the shape of the electric connection elements, so that the electric connection elements are embedded in the embedded grooves.

[0011] In a possible implementation, at least a part of the flow channel is located between intervals of the embedding grooves.

[0012] In a possible implementation, the electric connector is U-shaped, a transverse part of a middle part of the electric connector is attached to a surface of the water-cooled substrate through the first insulating and heat-conducting layer and is located between the electric core and the water-cooled substrate, and a plurality of electric cores are arranged between vertical parts at two ends of the electric connector in sequence.

[0013] In a possible implementation, free ends of the two vertical parts of the electric connector have extension parts, and the two extension parts extend in directions away from each other.

[0014] In a possible implementation, the first insulating and heat-conducting layer is a second heat-conducting structural adhesive, and the electric connector and the water-cooled substrate are fixedly connected through the second heat-conducting structural adhesive.

[0015] The second aspect provides a vehicle, which comprises the battery pack according to any one of the first aspect.

[0016] In the scheme shown in the present disclosure, a plurality of electric connectors for electrical connection in the battery pack are attached to a surface of a water-cooled substrate, so that the flow channel arranged inside the water-cooled substrate from the water inlet and the cooling liquid flowing out of the water outlet can directly take away the excess heat generated on the electric connectors, so that the electric connectors connecting the single electric cores can be sufficiently cooled and the temperature of the electric connectors is reduced. In the case of the same cross-sectional area of the electric connectors, the electric connectors can have a stronger current-carrying capacity, so that the energy loss can be reduced and the reduction of the electrical conductivity can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative effort.

[0018] Figure 1 is a split structure schematic diagram of a battery pack provided by the embodiments of the present disclosure;

[0019] Figure 2 is a connection structure schematic diagram of a water-cooled substrate and an electric connector provided by the embodiments of the present disclosure;

[0020] Figure 3 is a position schematic diagram of a flow channel and an embedding groove of a water-cooled substrate provided by the embodiments of the present disclosure.

[0021] Explanation of reference signs

[0022] 1, water-cooled base plate; 11, water inlet; 12, water outlet; 13, flow channel; 14, embedded groove; 2, electrical connector; 22, horizontal part; 23, vertical part; 24, extension; 3, electrical core; 4, second insulating and heat-conducting layer; 5, mounting shell; 51, crossbeam; 6, mounting hole. DETAILED DESCRIPTION

[0023] To make the objectives, technical solutions, and advantages of the present disclosure clearer, the following will further describe the embodiments of the present disclosure in detail with reference to the drawings.

[0024] The present embodiment specifically relates to a battery pack, and the structural features of the battery pack will be introduced below.

[0025] As Figure 1 shown is a split structure schematic diagram of the battery pack, as Figure 2 shown is a connection structure schematic diagram of the water-cooled base plate 1 and the electrical connector 2, as Figure 3 shown is a position schematic diagram of the flow channel 13 and the embedded groove 14 of the water-cooled base plate 1.

[0026] Referring to Figure 1 , the battery pack includes a mounting shell 5 and a water-cooled base plate 1, a plurality of electrical connectors 2, and a plurality of electrical cores 3 mounted inside the mounting shell 5. The mounting shell 5 is used to provide support and protection for the internal components such as the water-cooled base plate 1, the plurality of electrical connectors 2, and the plurality of electrical cores 3. The mounting shell 5 can be fully enclosed, semi-enclosed, or in the form of a frame as Figure 1 shown. The present embodiment does not limit the specific structure of the mounting shell 5, as long as it can provide support for the internal components.

[0027] Continuing to refer to Figure 1 and Figure 2 , the water-cooled base plate 1 is fixedly mounted inside the mounting shell 5. For example, the water-cooled base plate 1 can be fixed on both sides of the mounting shell 5 symmetrically, or the water-cooled base plate 1 can be fixed on all four sides of the mounting shell 5.

[0028] The fixing manner between the water-cooled base plate 1 and the mounting shell 5 can be detachable fixing or non-detachable fixing.

[0029] In one example, the water-cooled base plate 1 and the mounting shell 5 are detachably fixed and connected through the fixing structure by having matching fixing structures on all four sides of the water-cooled base plate 1 and the corresponding positions of the mounting shell 5.

[0030] For example, the fixing structure can be multiple pairs of bolts and nuts and multiple matching mounting holes 6 around the water-cooled substrate 1 and at corresponding positions on the mounting housing 5. The nut at the first end of the first bolt abuts against the water-cooled substrate 1, and the second end of the first bolt passes through the mounting holes 6 at corresponding positions on the water-cooled substrate 1 and the mounting housing 5 in sequence. Then, the first nut is screwed onto the second end of the first bolt and abuts against the mounting housing 5, thereby fixing the water-cooled substrate 1 and the mounting housing 5 together.

[0031] In one example, the fixing structure may be a plurality of pins and a plurality of mounting holes 6 around the water-cooled substrate 1. The first end of the pin has a pin cap that abuts against the water-cooled substrate 1, and the second end of the pin passes through the water-cooled substrate 1 and is riveted to the mounting housing 5, thereby fixing the water-cooled substrate 1 and the mounting housing 5 together.

[0032] In another example, the fixing structure may be a plurality of screws and a plurality of matching mounting holes 6 around the water-cooled substrate 1 and at corresponding positions on the mounting housing 5. The first end of the screw has a screw head that abuts against the water-cooled substrate 1, and the second end of the screw passes through the mounting hole 6 of the water-cooled substrate 1 and is screwed into the mounting hole of the mounting housing 5, thereby fixing the water-cooled substrate 1 and the mounting housing 5 together. The mounting hole of the mounting housing 5 is a screw hole.

[0033] Another way to assemble the water-cooled substrate 1 and the mounting housing 5 is to achieve a non-removable fixed connection between the water-cooled substrate 1 and the mounting housing 5 through welding or adhesive bonding.

[0034] For example, apply adhesive around one side of the water-cooled substrate 1 to bond the water-cooled substrate 1 to the mounting housing 5.

[0035] This embodiment does not limit the specific fixing method between the water-cooled substrate 1 and the mounting housing 5, as long as a stable connection between the water-cooled substrate 1 and the mounting housing 5 can be achieved.

[0036] by Figure 1 Taking the example shown, the mounting housing 5 can be frame-shaped. To increase the strength of the mounting housing 5, a crossbeam 51 can be provided in the middle of the mounting housing 5. The water-cooled substrate 1 can be mounted on the lower side of the crossbeam 51, and the module composed of the battery cells 3 can be arranged on the upper side of the water-cooled substrate 1. In this way, the module composed of the battery cells 3 can be two parts, located on both sides of the crossbeam 51 respectively. It should be noted that in this embodiment, "upper side" and "lower side" are the same as... Figure 1 The directions shown correspond to those shown.

[0037] refer to Figure 3As shown, the water-cooled substrate 1 has a water inlet 11, a water outlet 12, and a flow channel 13 arranged inside the water-cooled substrate 1, which is in communication with the water inlet 11 and the water outlet 12. The cooling liquid can enter the flow channel 13 inside the water-cooled substrate 1 from the water inlet 11 and then flow out of the water outlet 12. The heat transferred to the water-cooled substrate 1 from the outside can be taken away by the flowing cooling liquid, thereby achieving the cooling of the external devices in contact with the water-cooled substrate 1.

[0038] The above describes the assembly mode between the water-cooled substrate 1 and the mounting shell 5 and the structural features of the water-cooled substrate 1. The assembly mode between the water-cooled substrate 1 and the plurality of electrical connectors 2 and the positional relationship among the water-cooled substrate 1, the plurality of electrical connectors 2, and the plurality of battery cells 3 are described below.

[0039] Reference Figure 2 As shown, the electrical connector 2 is attached to the surface of the water-cooled substrate 1 through the first insulating and heat-conducting layer.

[0040] The electrical connector 2 is used for electrical connection in the battery pack. The material of the water-cooled substrate 1 is also often electrically conductive. Therefore, in order to avoid electric leakage of the electrical connector 2 and potential safety hazards, the first insulating and heat-conducting layer is used to contact the electrical connector 2 and the water-cooled substrate 1. On the one hand, it can avoid electric leakage of the electrical connector 2, and on the other hand, it can ensure the heat transfer between the electrical connector 2 and the water-cooled substrate 1. For example, the first insulating and heat-conducting layer can be a heat-conducting silicone sheet or a heat-conducting silicone cloth.

[0041] In an example, in order to avoid confusion of circuit control, the series connection and the parallel connection are crossed together. Therefore, the plurality of electrical connectors 2 are arranged at intervals.

[0042] In an example, the electrical connector 2 is used for electrical connection in the battery pack. For example, the electrical connector 2 can be a copper bar, an aluminum bar, or a copper-aluminum composite bar.

[0043] The type of the electrical connector 2 is not limited in the embodiment, which can realize the functions of current transmission and electrical component connection in the battery pack.

[0044] In an example, the electrical connector 2 can be connected to the input pole or the output pole of at least one battery cell 3. For example, one electrical connector 2 can be connected to the input pole or the output pole of one battery cell 3, or connected to the input pole or the output pole of two battery cells 3, or connected to the input pole of one battery cell 3 and the output pole of another battery cell 3, or connected to the input pole or the output pole of more different battery cells 3 at the same time, so as to realize the series connection or the parallel connection among the battery cells 3.

[0045] As described above, multiple electrical connectors 2 used for electrical connection within the battery pack are attached to the surface of the water-cooled substrate 1. Therefore, the coolant entering the flow channels 13 arranged inside the water-cooled substrate 1 from the inlet 11 and flowing out from the outlet 12 can directly carry away the excess heat generated on these electrical connectors 2, ensuring sufficient heat dissipation and reducing the temperature of the electrical connectors 2 connecting each individual battery cell 3. With the same cross-sectional area, the electrical connectors 2 can have a strong current-carrying capacity, thus reducing energy loss and preventing a decrease in conductivity.

[0046] In one example, to further reduce energy loss in the battery pack and prevent a decrease in conductivity, the battery pack also includes a second insulating and thermally conductive layer 4. Multiple battery cells 3 are disposed on the surface of a water-cooled substrate 1, and the second insulating and thermally conductive layer 4 is located between the battery cells 3 and the water-cooled substrate 1. The second insulating and thermally conductive layer 4 has a similar function to the first insulating and thermally conductive layer: while ensuring that the heat from the battery cells 3 is transferred to the water-cooled substrate 1, it isolates the battery cells 3 from the water-cooled substrate 1 to prevent leakage. For example, the second insulating and thermally conductive layer can be a thermally conductive silicone sheet or a thermally conductive silicone cloth, etc.

[0047] The battery cell 3 can be classified as a cylindrical battery cell, a pouch battery cell, or a square battery cell according to its structure. In this embodiment, the structural type of the battery cell 3 is not exemplified.

[0048] In one example, the multiple battery cells 3 and the multiple electrical connectors 2 may be located on two opposite surfaces of the water-cooled substrate 1, or they may be located on the same surface of the water-cooled substrate 1 as shown in Figure 1. Alternatively, the multiple battery cells 3 and / or the multiple electrical connectors 2 may be divided into two parts, which are located on two opposite surfaces of the water-cooled substrate 1, respectively.

[0049] Here, as an example, we will continue to refer to... Figure 2 As shown, multiple battery cells 3 and multiple electrical connectors 2 are configured to be located on the same surface of the water-cooled substrate 1, which facilitates the electrical connection between the multiple battery cells 3 and the multiple electrical connectors 2.

[0050] In one example, multiple battery cells 3 are fixedly connected to the second insulating and thermally conductive layer 4 and the second insulating and thermally conductive layer 4 is fixedly connected to the water-cooled substrate 1.

[0051] In order to avoid leakage caused by indirect contact or open circuit between the battery cell 3 and the water-cooled substrate 1.

[0052] Correspondingly, the multiple battery cells 3 can be fixedly connected to the second insulating and thermally conductive layer 4 by adhesive, and the second insulating and thermally conductive layer 4 can also be fixedly connected to the water-cooled substrate 1 by adhesive.

[0053] Or can be, the projection of the battery cell 3 on the second insulating heat-conducting layer 4 can not completely cover the second insulating heat-conducting layer 4, the battery cell 3 and the second insulating heat-conducting layer 4 can be fixedly connected through glue, and the second insulating heat-conducting layer 4 and the water-cooled base plate 1 can be fixedly connected through glue or screws, first bolts and the like.

[0054] In an example, the projection of the battery cell module composed of the battery cell 3 on the second insulating heat-conducting layer 4 is completely located in the second insulating heat-conducting layer 4, and the covered range is smaller than the second insulating heat-conducting layer 4, and the second insulating heat-conducting layer 4 and the water-cooled base plate 1 can be fixedly connected through bolts, nuts, pins and the like.

[0055] For example, the projection of the battery cell module composed of the plurality of battery cells 3 is located at the center of the second insulating heat-conducting layer 4, and the projection of the battery cell module composed of the plurality of battery cells 3 on the second insulating heat-conducting layer 4 is a first rectangle of 10 cm x 15 cm, and the second insulating heat-conducting layer 4 is a second rectangle of 12 cm x 18 cm, and the long side of the first rectangle is parallel to the long side of the second rectangle. The portions of the second insulating heat-conducting layer 4 located outside the first rectangle and located inside the second rectangle and the water-cooled base plate 2 have a plurality of second bolt holes on the symmetrical sides thereof, respectively, the nut at the first end of the second bolt abuts against the second insulating heat-conducting layer 4, the second end of the second bolt passes through the second bolt holes of the second insulating heat-conducting layer 4 and the water-cooled base plate 2 in turn, and then the second nut is screwed on the second end of the second bolt and abuts against the water-cooled base plate 2, so as to fix the water-cooled base plate 1 and the second insulating heat-conducting layer 4 together. The second bolt and the second nut can be made of an insulating material, such as nylon or epoxy resin.

[0056] As described above, the battery cell 3 and the water-cooled base plate 1 will not be in open space or indirect contact, so as to avoid the situation of electric leakage.

[0057] In another example, in order to realize the fixed connection between the plurality of battery cells 3 and the second insulating heat-conducting layer 4 and the fixed connection between the second insulating heat-conducting layer 4 and the water-cooled base plate 1, correspondingly, the second insulating heat-conducting layer 4 can be a first heat-conducting structural adhesive. Compared with the previous example, this example directly realizes the fixation of the battery cell 3 and the water-cooled base plate 1 through the second insulating heat-conducting layer 4, which not only can avoid the reduction of the heat transfer effect between the fixed battery cell 3 and the water-cooled base plate 1, but also can reduce the number of parts and avoid the unstable fixation between too many parts.

[0058] In an example, referring to Figure 1As shown, the electrical connector 2 is located between the battery cell 3 and the water-cooled substrate 1. For example, a plurality of battery cells 3 are arranged in a module, a plurality of electrical connectors 2 are arranged side by side, and the water-cooled substrate 1 is arranged between the plurality of electrical connectors 2. The battery cell 3 and the water-cooled substrate 1 are sequentially arranged and fixedly connected through the second insulating and heat-conducting layer 4. Since the electrical connector 2 has a fixed thickness, it can play a supporting role to ensure that the battery cell 3 and the water-cooled substrate 1 have a stable thickness interval. Therefore, the second insulating and heat-conducting layer 4 accommodated in the interval between the battery cell 3 and the water-cooled substrate 1 can also have a stable minimum thickness. Thus, the second insulating and heat-conducting layer 4 can avoid being thinned after being squeezed by the battery cell 3 and the water-cooled substrate 1, so as to ensure the bonding performance of the second insulating and heat-conducting layer 4 to the battery cell 3 and the water-cooled substrate 1.

[0059] In one example, continuing to refer to Figure 3 As shown, the surface of the water-cooled substrate 1 has a plurality of spaced- apart embedded grooves 14, and the shape of the embedded groove 14 is matched with the shape of the electrical connector 2, so that the electrical connector 2 is embedded in the embedded groove 14.

[0060] In one example, continuing to refer to Figure 3 As shown, the shape of the part of the electrical connector 2 attached to the surface of the water-cooled substrate 1 can be a straight strip shape, and the shape of the embedded groove 14 is also a straight strip shape. Alternatively, the shape of the part of the electrical connector 2 attached to the surface of the water-cooled substrate 1 can be an S shape, and the shape of the embedded groove 14 is also an S shape. Alternatively, the shape of the part of the electrical connector 2 attached to the surface of the water-cooled substrate 1 can be a snake shape, and the shape of the embedded groove 14 is also a snake shape.

[0061] As shown, the surface of the water-cooled substrate 1 has a plurality of spaced- apart embedded grooves 14, and the shape of the embedded groove 14 is matched with the shape of the electrical connector 2, so that the electrical connector 2 is embedded in the embedded groove 14.

[0062] In one example, the cross-sectional shape of the embedded groove 14 is dovetail-shaped. In this way, the electrical connector 2 can be easily embedded in the embedded groove 14.

[0063] In one example, at least a part of the flow channel 13 is located between the intervals of each embedded groove 14. In one example, the flow channel 13 is located between the intervals of each embedded groove 14. In another example, a part of the flow channel 13 is located between the intervals of each embedded groove 14.

[0064] For example Figure 3As shown, the flow channel 13 is in a serpentine shape in the water-cooling base plate 1, the water inlet 11 and the water outlet 12 are respectively connected to the head or tail of the serpentine shape, the straight portions of the serpentine shape are arranged between the embedding grooves 14, and the curved portions of the serpentine shape are used to connect the two ends of the straight portions, so that a part of the flow channel 13 is located between the intervals of the embedding grooves 14.

[0065] Alternatively, the water-cooling base plate 1 has a plurality of flow channels 13, a plurality of water inlets 11 and a plurality of water outlets 12, and the flow channels 13, the water inlets 11 and the water outlets 12 are one-to-one corresponding, each flow channel 13 is arranged between the embedding grooves 14, and the water inlets 11 and the water outlets 12 are respectively connected to the two ends of the corresponding flow channels 13. If the length of each flow channel 13 is greater than the length of each embedding groove 14, then the flow channel 13 can be located between the intervals of the embedding grooves 14; if the length of each flow channel 13 is less than or equal to the length of each embedding groove 14, then the flow channel 13 can be completely located between the intervals of the embedding grooves 14.

[0066] From the above, since the flow channel 13 is located between the intervals of the embedding grooves 14, on the one hand, the distance between the flow channel 13 and the battery cell 3 can be relatively small, and on the other hand, the distance between the flow channel 13 and the adjacent embedding groove 14 is also relatively small. In this way, the distance between the cooling liquid in the flow channel 13 and the battery cell 3 and the distance between the cooling liquid in the flow channel 13 and the electrical connector 2 in the embedding groove 14 are relatively small, so that the heat transfer efficiency between the cooling liquid and the electrical connector 2 and the battery cell 3 can be improved, thereby better cooling can be achieved.

[0067] In an example, the positions of the water inlets 11 and the water outlets 12 can be relatively far away from each other, for example, the water inlets 11 and the water outlets 12 can be respectively located on opposite sides of the water-cooling base plate 2; the positions of the water inlets 11 and the water outlets 12 can also be relatively close, for example, the water inlets 11 and the water outlets 12 are located on the same side of the water-cooling base plate 2, so as to facilitate the communication of the water inlets 11 and the water outlets 12 with the cooling liquid supply source. In addition, the water inlets 11 and the water outlets 12 can be located on the same surface of the water-cooling base plate 2 or on different surfaces of the water-cooling base plate 2.

[0068] In an example, the electrical connector 2 is in a U shape, the transverse portion 22 at the middle of the electrical connector 2 is attached to the surface of the water-cooling base plate 1 through the first insulating and heat-conducting layer and is located between the battery cell 3 and the water-cooling base plate 1, and a plurality of battery cells 3 are arranged between the vertical portions 23 at the two ends of the electrical connector 2 in sequence.

[0069] For example Figure 1 And referring to Figure 2 As shown, the module composed of a plurality of battery cells 3, the transverse portions 22 of the plurality of electrical connectors 2 arranged side by side and the water-cooling base plate 1 are sequentially stacked, and the vertical portions 23 of each electrical connector 2 are respectively located on both sides of the module.

[0070] From the above, the vertical part 23 of each electrical connector 2 can be located outside the module of the battery cell 3, and can jointly protect the module with the mounting shell 5 to improve the strength of the battery pack.

[0071] In one example, continuing to refer to 2, the free end of the two vertical parts 23 of the electrical connector 2 has an extension 24, and the two extensions 24 extend in directions away from each other. Among them, the direction in which the extension 24 extends allows a certain deviation, for example, a deviation of less than 3° in the horizontal direction or the vertical direction.

[0072] In this way, the electrical components outside the battery pack can be conveniently electrically connected to the inside of the battery pack through the extension 24 of the electrical connector 2.

[0073] In one example, the first insulating and heat-conducting layer is a second heat-conducting structural adhesive, and the electrical connector 2 and the water-cooled base plate 1 are fixedly connected through the second heat-conducting structural adhesive. For example Figure 1 As shown, the second heat-conducting structural adhesive of the first insulating and heat-conducting layer and the first heat-conducting structural adhesive of the second insulating and heat-conducting layer 4 can be coated at the same time, or can be coated separately.

[0074] In this way, the first insulating and heat-conducting layer directly fixes the battery cell 3 and the water-cooled base plate 1, which not only avoids the reduction of heat transfer effect between the fixed battery cell 3 and the water-cooled base plate 1, but also reduces the number of parts, and avoids the instability of the connection between too many parts.

[0075] In the embodiments of the present disclosure, the plurality of electrical connectors 2 for electrical connection in the battery pack are attached to the surface of the water-cooled base plate 1, so that the cooling liquid flowing into the flow channel 13 inside the water-cooled base plate 1 from the water inlet 11 and flowing out of the water outlet 12 can directly take away the excess heat generated on these electrical connectors 2, so that the electrical connectors 2 connecting the single battery cells 3 can be sufficiently cooled and the temperature of these electrical connectors 2 can be reduced. In the case where the cross-sectional area of the electrical connector 2 is the same, the electrical connector 2 can have a stronger current-carrying capacity, thereby reducing energy loss and avoiding reduction of electrical conductivity.

[0076] The present disclosure also provides a vehicle comprising any of the above battery packs, wherein the battery pack is mounted on the frame of the vehicle through the mounting shell, and the battery pack is used to provide the required electrical energy for the vehicle.

[0077] In the embodiments of the present disclosure, the plurality of electrical connectors 2 for electrical connection within the battery pack are attached to the surface of the water-cooled substrate 1, so that the cooling liquid flowing into the flow channel 13 inside the water-cooled substrate 1 from the water inlet 11 and flowing out of the water outlet 12 can directly take away the excess heat generated on the electrical connectors 2, so that the electrical connectors 2 connecting the single battery cells 3 can be sufficiently cooled and the temperature of the electrical connectors 2 can be reduced. In the case that the cross-sectional area of the electrical connectors 2 is the same, the electrical connectors 2 can have stronger current-carrying capacity, so that the energy loss can be reduced and the reduction of the electrical conductivity can be avoided.

[0078] It should be noted that the terms "first", "second" and the like in the description and claims of the present disclosure are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be exchanged under appropriate circumstances, so that the embodiments of the present disclosure can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second" and the like are generally of a kind and do not limit the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in an "or" relationship.

[0079] The above is only the preferred embodiment of the present disclosure, and is not intended to limit the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A battery pack, characterized by, The battery pack comprises a mounting shell (5) and a water-cooling base plate (1), a plurality of electrical connectors (2) and a plurality of battery cells (3) mounted inside the mounting shell (5); The water-cooling base plate (1) has a water inlet (11), a water outlet (12) and a flow channel (13) arranged inside the water-cooling base plate (1), the flow channel (13) being in communication with the water inlet (11) and the water outlet (12); The electrical connectors (2) are attached to the surface of the water-cooling base plate (1) through a first insulating and heat-conducting layer, the plurality of electrical connectors (2) being arranged at intervals, and the electrical connectors (2) being used for electrical connection in the battery pack; The battery pack further comprises a second insulating and heat-conducting layer (4), the plurality of battery cells (3) being arranged on the surface of the water-cooling base plate (1), and the second insulating and heat-conducting layer (4) being located between the battery cells (3) and the water-cooling base plate (1); The second insulating and heat-conducting layer (4) is a first heat-conducting structural adhesive, and the battery cells (3) and the water-cooling base plate (1) are fixedly connected through the first heat-conducting structural adhesive; The electrical connectors (2) are located between the battery cells (3) and the water-cooling base plate (1); The electrical connectors (2) are U-shaped, the horizontal part (22) of the middle part of the electrical connectors (2) being attached to the surface of the water-cooling base plate (1) through the first insulating and heat-conducting layer and being located between the battery cells (3) and the water-cooling base plate (1), and a plurality of the battery cells (3) being arranged between the vertical parts (23) of the two ends of the electrical connectors (2) in sequence; A plurality of the battery cells (3) form a module, and the vertical parts (23) of the electrical connectors (2) can be located outside the module, and the mounting shell (5) and the module jointly protect the module, thereby improving the strength of the battery pack.

2. The battery pack of claim 1, wherein, The surface of the water-cooling base plate (1) has a plurality of embedded grooves (14) arranged at intervals, the shape of the embedded grooves (14) being adapted to the shape of the electrical connectors (2) so that the electrical connectors (2) are embedded in the embedded grooves (14).

3. The battery pack of claim 2, wherein, At least a part of the flow channel (13) is located between the intervals of the embedded grooves (14).

4. The battery pack of claim 1, wherein, The free ends of the two vertical parts (23) of the electrical connectors (2) have extension parts (24), and the two extension parts (24) extend in directions away from each other.

5. The battery pack of claim 1, wherein, The first insulating and heat-conducting layer is a second heat-conducting structural adhesive, and the electrical connectors (2) and the water-cooling base plate (1) are fixedly connected through the second heat-conducting structural adhesive.

6. A vehicle characterized by comprising: The vehicle comprises the battery pack according to any one of claims 1 to 5.

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