Battery pack and vehicle

Abstract

The invention 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 as well as a water-cooling substrate, a plurality of electric connecting pieces and a plurality of battery cells which are mounted in the mounting shell, the water-cooling substrate is provided with a water inlet, a water outlet and a flow channel arranged in the water-cooling substrate, and the flow channel is communicated with the water inlet and the water outlet; the electric connecting pieces are attached to the surface of the water-cooling substrate through the first insulating heat-conducting layer, are arranged at intervals and are used for performing electric connection in the battery pack. According to the battery pack and the vehicle disclosed by the invention, sufficient heat dissipation of the electric connecting pieces among the battery cells can be realized.

Description

Technical Field

[0001] The present disclosure relates to the field of battery technology, and in particular to a battery pack and a vehicle. Background Art

[0002] As an efficient heat dissipation solution, liquid cooling is often used in the battery system of electric vehicles. The core component of the liquid cooling solution is the water cooling plate. The water cooling plate is often arranged at the bottom or top of the power battery. The power battery transfers the excess heat generated during work to the coolant in the flow channel inside the water cooling plate through contact with the surface of the water cooling plate, and is finally taken away by the coolant to achieve heat dissipation of the battery. The power battery pack of an electric vehicle is composed of several single cells connected by electrical connectors. The electrical connectors between the cells are often difficult to obtain sufficient heat dissipation, and the temperature is easy to rise, which leads to large energy loss and reduced conductivity. Summary of the invention

[0003] In view of this, the embodiments of the present disclosure provide a battery pack and a vehicle that can achieve sufficient heat dissipation of the electrical connectors between the battery 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 mounted inside the mounting shell, a plurality of electrical connectors, and a plurality of battery cells;

[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 connected to the water inlet and the water outlet;

[0006] The electrical connector is attached to the surface of the water-cooled substrate via a first insulating heat-conducting layer. The plurality of electrical connectors are arranged at intervals, and the electrical connectors are used for electrical connection in the battery pack.

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

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

[0009] In a possible implementation manner, the electrical connector is located between the battery core and the water-cooling substrate.

[0010] In a possible implementation, the surface of the water-cooling substrate has a plurality of embedding grooves arranged at intervals, and the shape of the embedding grooves is adapted to the shape of the electrical connector so that the electrical connector can be embedded in the embedding grooves.

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

[0012] In a possible implementation, the electrical connector is U-shaped, the transverse portion in the middle of the electrical connector is attached to the surface of the water-cooled substrate through the first insulating heat-conductive layer and is located between the battery core and the water-cooled substrate, and the plurality of battery cores are arranged in sequence between the vertical portions at both ends of the electrical connector.

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

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

[0015] A second aspect provides a vehicle, comprising a battery pack as described in any one of the first aspects.

[0016] In the solution disclosed in the present disclosure, a plurality of electrical connectors for electrical connection in the battery pack are attached to the surface of the water-cooled substrate, so that the coolant entering the flow channel arranged inside the water-cooled substrate from the water inlet and flowing out from the water outlet can directly take away the excess heat generated by these electrical connectors, so that the electrical connectors connecting each single cell can obtain sufficient heat dissipation and reduce the temperature of these electrical connectors. When the cross-sectional area of ​​the electrical connectors is the same, the electrical connectors can have a stronger current carrying capacity, thereby reducing energy loss and avoiding the reduction of conductive performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 is a schematic diagram of a disassembled structure of a battery pack provided by an embodiment of the present disclosure;

[0019] Figure 2 It is a schematic diagram of a connection structure between a water-cooling base plate and an electrical connector provided by an embodiment of the present disclosure;

[0020] Figure 3 It is a schematic diagram of the positions of flow channels and embedding grooves of a water-cooled substrate provided in an embodiment of the present disclosure.

[0021] Description of Reference Numerals

[0022] 1. Water-cooled base plate; 11. Water inlet; 12. Water outlet; 13. Flow channel; 14. Embedding groove; 2. Electrical connector; 22. Horizontal part; 23. Vertical part; 24. Extension part; 3. Battery cell; 4. Second insulating heat-conducting layer; 5. Mounting shell; 51. Crossbeam; 6. Mounting hole. DETAILED DESCRIPTION

[0023] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

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

[0025] like Figure 1 The figure shows the schematic diagram of the disassembled structure of the battery pack. Figure 2 The figure shows a schematic diagram of the connection structure between the water-cooled substrate 1 and the electrical connector 2. Figure 3 It is a schematic diagram showing the positions of the flow channel 13 and the embedding groove 14 of the water-cooling substrate 1 .

[0026] refer to Figure 1 As shown, the battery pack includes a mounting shell 5 and a water-cooled substrate 1, a plurality of electrical connectors 2, and a plurality of battery cells 3 mounted inside the mounting shell 5. The mounting shell 5 is used to provide support and protection for the internal water-cooled substrate 1, the plurality of electrical connectors 2, the plurality of battery cells 3, and the like. The mounting shell 5 can be fully enclosed, semi-enclosed, or partially enclosed. Figure 1 As shown in the frame type, the present embodiment does not limit the specific structure of the mounting shell 5, and it only needs to provide support for the internal components.

[0027] Continue to refer Figure 1 and Figure 2 As shown, the water-cooled substrate 1 is fixedly installed inside the mounting shell 5 . For example, two symmetrical sides of the water-cooled substrate 1 may be fixed to the mounting shell 5 , or all four sides of the water-cooled substrate 1 may be fixed to the mounting shell 5 .

[0028] The fixing method between the water-cooling substrate 1 and the mounting shell 5 may be a detachable fixing or a non-detachable fixing.

[0029] In one example, by providing matching fixing structures around the water-cooling substrate 1 and at corresponding positions of the mounting shell 5 , the water-cooling substrate 1 and the mounting shell 5 are detachably fixedly connected via the fixing structures.

[0030] For example, the fixing structure may be a plurality of pairs of bolts and nuts and a plurality of matching mounting holes 6 around the water-cooling base plate 1 and at corresponding positions of the mounting shell 5, the nut at the first end of the first bolt abuts against the water-cooling base plate 1, the second end of the first bolt passes through the mounting holes 6 at corresponding positions on the water-cooling base plate 1 and the mounting shell 5 in sequence, and then the first nut is screwed on the second end of the first bolt and abuts against the mounting shell 5, so that the water-cooling base plate 1 and the mounting shell 5 are fixedly connected 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 having a pin cap abutting against the water-cooled substrate 1, and the second end of the pin passing through the water-cooled substrate 1 is riveted to the mounting shell 5, thereby fixing the water-cooled substrate 1 and the mounting shell 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 of the mounting shell 5, wherein the first end of the screw has a screw cap 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 shell 5, thereby fixing the water-cooled substrate 1 and the mounting shell 5 together, wherein the mounting hole of the mounting shell 5 is a screw hole.

[0033] Another assembly method of the water-cooling substrate 1 and the mounting shell 5 may be that the water-cooling substrate 1 and the mounting shell 5 are non-detachably fixedly connected by a welding process or an adhesive process.

[0034] For example, glue is applied around one side of the water-cooling substrate 1 to bond the water-cooling substrate 1 and the mounting shell 5 to the mounting shell 5 .

[0035] The present embodiment does not limit the specific fixing method of the water-cooling substrate 1 and the mounting shell 5 , as long as a stable connection between the water-cooling substrate 1 and the mounting shell 5 is achieved.

[0036] by Figure 1 As shown in the example, the mounting housing 5 may be frame-shaped. In order to increase the strength of the mounting housing 5, the middle portion of the mounting housing 5 may have a crossbeam 51. The water-cooling substrate 1 may be mounted on the lower side of the crossbeam 51, and the module composed of the battery cells 3 may be arranged on the upper side of the water-cooling substrate 1. In this way, the module composed of the battery cells 3 may be two parts, which are respectively located on both sides of the crossbeam 51. It should be noted that the "upper side" and "lower side" in this embodiment are the same as Figure 1 The orientation shown in corresponds to .

[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, and the flow channel 13 is connected to both the water inlet 11 and the water outlet 12. The coolant can enter the flow channel 13 inside the water-cooled substrate 1 from the water inlet 11 and then flow out from the water outlet 12. The heat transferred from the outside to the water-cooled substrate 1 can be taken away by the flowing coolant, thereby achieving the cooling of the external components contacting the water-cooled substrate 1.

[0038] The above introduces the assembly method between the water-cooling substrate 1 and the mounting shell 5 and the structural features of the water-cooling substrate 1. The following introduces the assembly method between the water-cooling substrate 1 and multiple electrical connectors 2 and the positional relationship between the water-cooling substrate 1, multiple electrical connectors 2 and multiple battery cells 3.

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

[0040] Among them, since the function of the electrical connector 2 is to make electrical connections in the battery pack, and the material used to make the water-cooled substrate 1 is often also conductive. Therefore, in order to avoid leakage of the electrical connector 2 and potential safety hazards, the electrical connector 2 and the water-cooled substrate 1 are in contact through a first insulating heat-conducting layer, which can avoid leakage of the electrical connector 2 on the one hand, and ensure the transfer of heat between the electrical connector 2 and the water-cooled substrate 1 on the other hand. For example, the first insulating heat-conducting layer can be a heat-conducting silicone sheet, or a heat-conducting silicone cloth and other materials.

[0041] In one example, in order to avoid confusion in circuit control, series connection and parallel connection are cross-connected, so the plurality of electrical connectors 2 are arranged at intervals.

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

[0043] The present embodiment does not limit the type of the electrical connector 2 , as long as it can achieve the functions of current transmission and connecting electrical components in the battery pack.

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

[0045] As can be seen from the above, a plurality of electrical connectors 2 for electrical connection in the battery pack are attached to the surface of the water-cooled substrate 1. Therefore, the coolant that enters the flow channel 13 arranged inside the water-cooled substrate 1 from the water inlet 11 and flows out from the water outlet 12 can directly take away the excess heat generated by these electrical connectors 2, so that the electrical connectors 2 connecting each single cell 3 can obtain sufficient heat dissipation and reduce the temperature of these electrical connectors 2. When the cross-sectional area of ​​the electrical connectors 2 is the same, the electrical connectors 2 can have a stronger current carrying capacity, thereby reducing energy loss and avoiding a reduction in conductive performance.

[0046] In one example, in order to further reduce the energy loss of the battery pack and avoid the reduction of the conductive performance, the battery pack also includes a second insulating thermal conductive layer 4, and multiple battery cells 3 are arranged on the surface of the water-cooled substrate 1, and the second insulating thermal conductive layer 4 is located between the battery cells 3 and the water-cooled substrate 1. Among them, the second insulating thermal conductive layer 4 has a similar function to the first insulating thermal conductive layer. While ensuring that the heat of the battery cells 3 is transferred to the water-cooled substrate 1, the battery cells 3 are isolated from the water-cooled substrate 1 to avoid leakage. For example, the second insulating thermal conductive layer can be a thermally conductive silicone sheet, or it can be a thermally conductive silicone cloth and other materials.

[0047] The battery cell 3 may be a cylindrical battery cell, a soft-pack battery cell or a square battery cell according to the structure. In this embodiment, the structural type of the battery cell 3 is not illustrated.

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

[0049] As an example, continue to refer to Figure 2 As shown, the plurality of battery cells 3 and the plurality of electrical connectors 2 are configured to be located together on the same surface of the water-cooled substrate 1 , so that the electrical connection between the plurality of battery cells 3 and the plurality of electrical connectors 2 is convenient.

[0050] In an example, the plurality of battery cells 3 and the second insulating heat-conducting layer 4 as well as the second insulating heat-conducting layer 4 and the water-cooling substrate 1 are fixedly connected.

[0051] In order to avoid indirect contact or disconnection between the battery cell 3 and the water-cooling substrate 1 to cause leakage.

[0052] Correspondingly, the multiple battery cells 3 and the second insulating heat-conducting layer 4 may be fixedly connected by glue, and the second insulating heat-conducting layer 4 and the water-cooling substrate 1 may also be fixedly connected by glue.

[0053] Alternatively, the projection of the battery core 3 on the second insulating heat-conducting layer 4 cannot completely cover the second insulating heat-conducting layer 4, the battery core 3 and the second insulating heat-conducting layer 4 can be fixedly connected by glue, and the second insulating heat-conducting layer 4 and the water-cooled substrate 1 can be fixedly connected by glue or by screws, first bolts, etc.

[0054] In one example, the projection of the battery cell module composed of the battery cells 3 on the second insulating thermal conductive layer 4 is completely located within the second insulating thermal conductive layer 4, and the coverage area is smaller than the second insulating thermal conductive layer 4. The second insulating thermal conductive layer 4 and the water-cooled substrate 1 can be fixedly connected by bolts, nuts, pins, etc.

[0055] For example, the cell module composed of multiple cells 3 is projected at the center of the second insulating heat-conducting layer 4, and the projection of the cell module composed of multiple cells 3 on the second insulating heat-conducting layer 4 is a first rectangle of 10cm×15cm, and the second insulating heat-conducting layer 4 is a second rectangle of 12cm×18cm, and the long side of the first rectangle is parallel to the long side of the second rectangle. The second insulating heat-conducting layer 4 has multiple second bolt holes on both sides of the part symmetrically located outside the first rectangle and inside the second rectangle and on the water-cooling substrate 2, respectively, and the nut located at the first end of the second bolt abuts against the second insulating heat-conducting layer 4, and the second end of the second bolt passes through the second bolt holes of the second insulating heat-conducting layer 4 and the water-cooling substrate 2 in turn, and then is screwed on the second end of the second bolt through the second nut, and abuts against the water-cooling substrate 2, so that the water-cooling substrate 1 and the second insulating heat-conducting layer 4 are fixedly connected together. Among them, the second bolt and the second nut can be made of insulating materials, such as nylon or epoxy resin.

[0056] As described above, there will be no open space or indirect contact between the battery cell 3 and the water-cooling substrate 1, so as to avoid leakage.

[0057] In another example, in order to achieve fixed connection between multiple battery cells 3 and the second insulating heat-conducting layer 4 and the second insulating heat-conducting layer 4 and the water-cooling substrate 1, the second insulating heat-conducting layer 4 can be a first heat-conducting structural adhesive. Compared with the previous example, this example directly fixes the battery cells 3 and the water-cooling substrate 1 through the second insulating heat-conducting layer 4, which can not only avoid the reduction of the effect of heat transfer between the fixed battery cells 3 and the water-cooling substrate 1, but also reduce the number of components and avoid the unstable fixation that may be caused by the connection between too many components.

[0058] In one example, reference Figure 1As shown, the electrical connector 2 is located between the battery cell 3 and the water-cooled substrate 1. For example, a module composed of multiple battery cells 3, multiple electrical connectors 2 arranged side by side, and the water-cooled substrate 1 are stacked in sequence, and the battery cell 3 and the water-cooled substrate 1 are fixedly connected through the second insulating heat-conducting layer 4. Since the electrical connector 2 has a fixed thickness, it can play a supporting role and ensure that there is a stable thickness interval between the battery cell 3 and the water-cooled substrate 1. Then, the second insulating 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. Thereby, the second insulating heat-conducting layer 4 can be prevented from 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 heat-conducting layer 4 to the battery cell 3 and the water-cooled substrate 1.

[0059] In one example, continue to refer to Figure 3 As shown, the surface of the water-cooling base plate 1 has a plurality of embedding grooves 14 arranged at intervals, and the shape of the embedding grooves 14 matches the shape of the electrical connector 2 so that the electrical connector 2 can be embedded in the embedding grooves 14 .

[0060] Among them, reference Figure 3 As shown, the shape of the portion of the electrical connector 2 attached to the surface of the water-cooled substrate 1 can be a straight bar, then the shape of the embedded groove 14 is also a straight bar; or, the shape of the portion of the electrical connector 2 attached to the surface of the water-cooled substrate 1 can be S-shaped, then the shape of the embedded groove 14 is also S-shaped; or, the shape of the portion of the electrical connector 2 attached to the surface of the water-cooled substrate 1 can be serpentine, then the shape of the embedded groove 14 is also serpentine.

[0061] As described above, since a part of the electrical connector 2 is embedded in the surface of the water-cooled substrate 1, the thickness of the interval between the battery cell 3 and the water-cooled substrate 1 can be reduced without changing the thickness of the electrical connector 2. In this way, while ensuring the minimum thickness of the second insulating heat-conducting layer 4 and the bonding performance of the second insulating heat-conducting layer 4 to the battery cell 3 and the water-cooled substrate 1, the thickness of the second insulating heat-conducting layer 4 is reduced, the distance between the battery cell 3 and the water-cooled substrate 1 is reduced, the thermal resistance is reduced, and the speed of heat transfer from the battery cell 3 to the second insulating heat-conducting layer 4 is increased, so that the temperature can be better reduced.

[0062] In one example, the cross-sectional shape of the embedding groove 14 is a dovetail shape, so that the electrical connector 2 can be easily embedded in the embedding groove 14 .

[0063] In one example, at least a portion of the flow channel 13 is located between the intervals of the embedding grooves 14. The flow channel 13 may be entirely located between the intervals of the embedding grooves 14, or a portion of the flow channel 13 may be located between the intervals of the embedding grooves 14.

[0064] For example Figure 3As shown, the flow channel 13 is serpentine in the water-cooled substrate 1, the water inlet 11 and the water outlet 12 are respectively connected to the head or tail of the serpentine, multiple straight parts of the serpentine and each embedded groove 14 are spaced apart from each other, and the curved part of the serpentine is used to connect the two ends of the multiple straight parts, so that a part of the flow channel 13 is located between the intervals of the embedded grooves 14.

[0065] Alternatively, the water-cooled substrate 1 has multiple flow channels 13, multiple water inlets 11 and multiple water outlets 12, and the flow channels 13, the water inlets 11 and the water outlets 12 correspond to each other, each flow channel 13 and each embedded groove 14 are arranged at intervals from each other, and the water inlet 11 and the water outlet 12 are respectively connected to the two ends of the corresponding flow channel 13. If the length of each flow channel 13 is greater than the length of each embedded groove 14, then the flow channel 13 can be partially located between the intervals of the embedded groove 14; if the length of each flow channel 13 is less than or equal to the length of each embedded groove 14, then the flow channel 13 can be completely located between the intervals of the embedded groove 14.

[0066] As described above, since the flow channel 13 is located between the intervals of each embedding groove 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 coolant in the flow channel 13 and the battery cell 3 and the distance between the coolant 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 coolant and the electrical connector 2 and the battery cell 3 can be improved, so that the temperature can be better reduced.

[0067] In one example, the water inlet 11 and the water outlet 12 may be located at different positions from each other, for example, the water inlet 11 and the water outlet 12 may be located at opposite sides of the water-cooled substrate 2; the water inlet 11 and the water outlet 12 may also be located relatively close to each other, for example, the water inlet 11 and the water outlet 12 may be located at the same side of the water-cooled substrate 2, so that it is convenient to connect the water inlet 11 and the water outlet 12 to the cooling liquid supply source. In addition, the water inlet 11 and the water outlet 12 may be located on the same surface of the water-cooled substrate 2, or on different surfaces of the water-cooled substrate 2.

[0068] In one example, the electrical connector 2 is U-shaped, and the horizontal portion 22 in the middle of the electrical connector 2 is attached to the surface of the water-cooled substrate 1 through a first insulating heat-conducting layer and is located between the battery cell 3 and the water-cooled substrate 1, and multiple battery cells 3 are arranged in sequence between the vertical portions 23 at both ends of the electrical connector 2.

[0069] For example Figure 1 And refer to Figure 2 As shown, a module composed of multiple battery cells 3, a horizontal portion 22 of multiple electrical connectors 2 arranged side by side and a water-cooled substrate 1 are stacked in sequence, and the vertical portion 23 of each electrical connector 2 is located on both sides of the module.

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

[0071] In one example, as shown in reference 2, the free ends of the two vertical portions 23 of the electrical connector 2 have extension portions 24, and the two extension portions 24 extend in directions away from each other. The directions in which the extension portions 24 extend are allowed to have a certain deviation, for example, a deviation of less than 3° in the horizontal direction or the vertical direction.

[0072] In this way, it is convenient for external electrical components to be electrically connected to the inside of the battery pack through the extension portion 24 of the electrical connector 2 .

[0073] In one example, the first insulating heat-conducting layer is a second heat-conducting structural adhesive, and the electrical connector 2 and the water-cooling substrate 1 are fixedly connected by the second heat-conducting structural adhesive. Figure 1 As shown, the second thermally conductive structural adhesive of the first insulating thermally conductive layer and the first thermally conductive structural adhesive of the second insulating thermally conductive layer 4 can be applied simultaneously or separately.

[0074] In this way, the battery cell 3 and the water-cooled substrate 1 are directly fixed by the first insulating heat-conducting layer, which can not only avoid the reduction of the heat transfer effect between the battery cell 3 and the water-cooled substrate 1, but also reduce the number of components and avoid the unstable fixation that may be caused by the connection between too many components.

[0075] In the disclosed embodiment, a plurality of electrical connectors 2 for electrical connection in the battery pack are attached to the surface of the water-cooled substrate 1. Therefore, the coolant that enters the flow channel 13 arranged inside the water-cooled substrate 1 from the water inlet 11 and flows out from the water outlet 12 can directly take away the excess heat generated by these electrical connectors 2, so that the electrical connectors 2 connecting each single cell 3 can obtain sufficient heat dissipation and reduce the temperature of these electrical connectors 2. When the cross-sectional area of ​​the electrical connectors 2 is the same, the electrical connectors 2 can have a stronger current carrying capacity, thereby reducing energy loss and avoiding a reduction in conductive performance.

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

[0077] In the disclosed embodiment, a plurality of electrical connectors 2 for electrical connection in the battery pack are attached to the surface of the water-cooled substrate 1. Therefore, the coolant that enters the flow channel 13 arranged inside the water-cooled substrate 1 from the water inlet 11 and flows out from the water outlet 12 can directly take away the excess heat generated by these electrical connectors 2, so that the electrical connectors 2 connecting each single cell 3 can obtain sufficient heat dissipation and reduce the temperature of these electrical connectors 2. When the cross-sectional area of ​​the electrical connectors 2 is the same, the electrical connectors 2 can have a stronger current carrying capacity, thereby reducing energy loss and avoiding a reduction in conductive performance.

[0078] It should be noted that the terms "first", "second", etc. in the specification 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 interchangeable 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", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0079] The above are only preferred embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. A battery pack, characterized in that: The battery pack comprises a mounting shell (5), a water-cooling base plate (1) mounted inside the mounting shell (5), a plurality of electrical connectors (2), and a plurality of battery cells (3); The water-cooling substrate (1) comprises a water inlet (11), a water outlet (12), and a flow channel (13) arranged inside the water-cooling substrate (1), wherein the flow channel (13) is connected to both the water inlet (11) and the water outlet (12); The electrical connector (2) is attached to the surface of the water-cooled substrate (1) via a first insulating heat-conducting layer, the plurality of electrical connectors (2) are arranged at intervals, and the electrical connectors (2) are used to perform electrical connections within the battery pack.

2. The battery pack according to claim 1, characterized in that: The battery pack further comprises a second insulating heat-conducting layer (4); the plurality of battery cells (3) are arranged on the surface of the water-cooling substrate (1); and the second insulating heat-conducting layer (4) is located between the battery cells (3) and the water-cooling substrate (1).

3. The battery pack according to claim 2, characterized in that: The second insulating heat-conducting layer (4) is a first heat-conducting structural adhesive, and the battery core (3) and the water-cooling substrate (1) are fixedly connected via the first heat-conducting structural adhesive.

4. The battery pack according to claim 3, characterized in that: The electrical connector (2) is located between the battery core (3) and the water-cooling substrate (1).

5. The battery pack according to claim 4, characterized in that: The surface of the water-cooling substrate (1) has a plurality of embedding grooves (14) arranged at intervals, and the shape of the embedding grooves (14) is adapted to the shape of the electrical connector (2) so that the electrical connector (2) can be embedded in the embedding grooves (14).

6. The battery pack according to claim 5, characterized in that: At least a portion of the flow channel (13) is located between the intervals of the embedding grooves (14).

7. The battery pack according to claim 2, characterized in that: The electrical connector (2) is U-shaped, a transverse portion (22) in the middle of the electrical connector (2) is attached to the surface of the water-cooled substrate (1) through the first insulating heat-conducting layer and is located between the battery core (3) and the water-cooled substrate (1), and a plurality of the battery cores (3) are sequentially arranged between the vertical portions (23) at both ends of the electrical connector (2).

8. The battery pack according to claim 7, characterized in that: The free ends of the two vertical portions (23) of the electrical connector (2) are provided with extension portions (24), and the two extension portions (24) extend in directions away from each other.

9. The battery pack according to claim 1, characterized in that: The first insulating heat-conducting layer is a second heat-conducting structural adhesive, and the electrical connector (2) and the water-cooling substrate (1) are fixedly connected via the second heat-conducting structural adhesive.

10. A vehicle, characterized in that: The vehicle comprises the battery pack according to any one of claims 1 to 9.

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