Battery pack and electric equipment with same

Abstract

The utility model discloses a battery pack and electric equipment with the battery pack, and the battery pack comprises a shell which defines an accommodating cavity; the plurality of battery modules are arranged in the accommodating cavity, each battery module comprises a plurality of battery monomers arranged along a first direction, the plurality of battery modules are arranged along a second direction, and the second direction is perpendicular to the first direction; the cooling module is arranged between the two adjacent battery modules, first matching parts are arranged at the two ends of the cooling module in the first direction, and the first matching parts are matched with the battery monomers at the two ends of the battery module in the first direction and used for applying acting force facing each other to the two battery monomers. According to the battery pack disclosed by the embodiment of the utility model, the first matching part is arranged on the cooling module, so that the cooling module plays a role of a pulling plate, the pulling plate does not need to be independently arranged or the number of the pulling plates in the battery pack can be reduced, the space in the battery pack is convenient to release, and a larger space is reserved for the battery monomers.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and more specifically, to a battery pack and an electrical device. Background Art

[0002] With the development of new energy vehicles, the demand for battery capacity in vehicles is increasing. How to increase the battery capacity has become a major pain point. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a battery pack. By providing a first mating portion on the cooling module, the cooling module can not only cool the battery cells, but also tension a plurality of battery cells in a first direction, so that the cooling module functions as a tensioning plate. In this way, it is not necessary to separately provide a tensioning plate or the number of tensioning plates in the battery pack can be reduced, which is convenient for reducing the number of components in the battery pack, releasing the space inside the battery pack, and reserving a larger space for the battery cells.

[0004] The utility model also provides an electrical device having the above battery pack.

[0005] The battery pack according to the first aspect embodiment of the utility model includes: a housing that defines an accommodation cavity; a plurality of battery modules disposed in the accommodation cavity, the battery modules including a plurality of battery cells arranged in a first direction, and the plurality of battery modules are arranged in a second direction perpendicular to the first direction; at least one cooling module disposed between two adjacent battery modules for cooling the battery cells, wherein the cooling module is provided with first mating portions at both ends in the first direction, and the first mating portions cooperate with the battery cells at both ends of the battery module in the first direction to apply a force towards each other to these two battery cells.

[0006] By providing a first mating portion on the cooling module, the battery pack according to the embodiment of the utility model enables the cooling module to not only cool the battery cells, but also tension a plurality of battery cells in the first direction, so that the cooling module functions as a tensioning plate. In this way, it is not necessary to separately provide a tensioning plate or the number of tensioning plates in the battery pack can be reduced, which is convenient for reducing the number of components in the battery pack, releasing the space inside the battery pack, and reserving a larger space for the battery cells.

[0007] In addition, the battery pack according to the above embodiment of the utility model may further have the following additional technical features:

[0008] According to some embodiments of the present utility model, the cooling module includes: a heat exchange plate having a heat exchange flow channel for placing a heat exchange medium, and the heat exchange plate exchanges heat with the battery module; a heat pipe, the heat pipe exchanges heat with the battery module and is stacked with the heat exchange plate.

[0009] According to some alternative embodiments of the present utility model, a liquid inlet interface and a liquid outlet interface are provided on the first side wall of the housing, the liquid inlet interface is communicated with the inlet of the heat exchange flow channel, and the liquid outlet interface is communicated with the outlet of the heat exchange flow channel.

[0010] According to some alternative embodiments of the present utility model, first engaging portions are provided at both ends of the heat pipe in the first direction, and the first engaging portions of the heat pipe cooperate with the battery cells of the battery module adjacent thereto; and / or, first engaging portions are provided at both ends of the heat exchange plate in the first direction, and the first engaging portions of the heat exchange plate cooperate with the battery cells of the battery module adjacent thereto.

[0011] According to some alternative embodiments of the present utility model, the battery pack includes three battery modules, a cooling module is provided between every two adjacent battery modules, the battery module in the middle exchanges heat with the heat exchange plate on both end faces in the second direction, and the battery modules on both sides exchange heat with the corresponding heat pipes.

[0012] According to some embodiments of the present utility model, at least one heat conductive pad is provided between adjacent battery modules and the cooling module, and a glue coating space for filling a heat conductive glue layer is defined among the heat conductive pad, the battery module and the cooling module.

[0013] According to some embodiments of the present utility model, the battery pack further includes a pulling plate. In the second direction, the pulling plate and the cooling module are located on both sides of the battery module. Second engaging portions are provided at both ends of the pulling plate in the first direction, and the second engaging portions cooperate with the battery cells at both ends of the battery module in the first direction to apply a force towards each other to these two battery cells.

[0014] According to some embodiments of the present utility model, the battery pack further includes a detection module, and the detection module is at least used to collect voltage and temperature data of the battery module. The detection module includes: a plurality of first acquisition components, the plurality of first acquisition components are arranged in one-to-one correspondence with the plurality of battery modules, each first acquisition component extends along the first direction, the first acquisition component is located at one end of the battery module in the third direction and is electrically connected to a plurality of battery cells of the corresponding battery module; a plurality of second acquisition components, the plurality of second acquisition components are arranged in one-to-one correspondence with the plurality of battery modules, the second acquisition component extends along the first direction, the second acquisition component is located at the other end of the battery module in the third direction and is electrically connected to the plurality of battery cells, and the second acquisition component communicates with the first acquisition component, and the third direction is perpendicular to the first direction and the second direction respectively.

[0015] According to some alternative embodiments of the present utility model, the plurality of second acquisition components are connected by wires, and an external interface is provided on one of the second acquisition components.

[0016] According to some specific embodiments of the present utility model, the first acquisition component includes a plurality of first circuit boards arranged in sequence, and each first circuit board is communicatively connected to the second acquisition component; and / or, the second acquisition component is a plurality of second circuit boards arranged in sequence, and the plurality of second circuit boards are electrically connected by wires.

[0017] In some embodiments, the first circuit board is a flexible circuit board or a printed circuit board, and the second circuit board is a printed circuit board.

[0018] According to some alternative embodiments of the present utility model, an avoidance opening is provided on the first side wall of the housing for avoiding the external interface.

[0019] According to an embodiment of the second aspect of the present utility model, an electrical device is provided, and the electrical device includes the battery pack according to the embodiment of the first aspect of the present utility model.

[0020] According to the electrical device of the embodiment of the present utility model, by using the battery pack according to the embodiment of the first aspect of the present utility model, a first matching portion is provided on the cooling module, so that while the cooling module cools the battery cells, it can also tension a plurality of battery cells along the first direction, enabling the cooling module to function as a tensioning plate. In this way, there is no need to separately provide a tensioning plate or the number of tensioning plates in the battery pack can be reduced, which is convenient for reducing the number of components in the battery pack, facilitating the release of the space inside the battery pack, and reserving a larger space for the battery cells.

[0021] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. Brief Description of the Drawings

[0022] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the following description of embodiments in conjunction with the accompanying drawings, wherein:

[0023] Figure 1 is a schematic structural diagram of a battery pack according to an embodiment of the present utility model;

[0024] Figure 2 is an exploded structural diagram of the battery pack according to an embodiment of the present utility model;

[0025] Figure 3 is a schematic partial structural diagram of the battery pack according to an embodiment of the present utility model;

[0026] Figure 4 is an exploded partial structural diagram of the battery pack according to an embodiment of the present utility model;

[0027] Figure 5 is a schematic partial structural diagram of the battery pack according to an embodiment of the present utility model;

[0028] Figure 6 is a schematic partial structural diagram of the battery pack according to an embodiment of the present utility model;

[0029] Figure 7 is a schematic partial structural diagram of the detection module according to an embodiment of the present utility model;

[0030] Figure 8 is a schematic structural diagram of a first electrical connection piece, a second electrical connection piece and a third electrical connection piece according to an embodiment of the present utility model.

[0031] Reference Numerals: Battery pack 1, housing 10, box body 101, lower support plate 102, accommodation cavity 103, first side wall 11, liquid inlet interface 121, liquid outlet interface 122, end plate 15,

[0032] Battery module 20, battery cell 21, cooling module 30, heat exchange plate 301, temperature equalizing plate 302, first fitting portion 31, first docking portion 321, second docking portion 322,

[0033] Thermal pad 41, pull plate 42, second fitting portion 421, first pipeline 46, second pipeline 47, separation pad 48,

[0034] First acquisition member 51, first circuit board 511, second acquisition member 52, second circuit board 521, external interface 522,

[0035] First electrical connection piece 61, second electrical connection piece 62, third electrical connection piece 63, positive electrode post 64, negative electrode post 65, fuse 66, plastic bracket 71. Detailed implementation manners

[0036] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0037] The battery pack 1 according to an embodiment of the present utility model will be described below with reference to the accompanying drawings.

[0038] As Figures 1 - 4 shown, the battery pack 1 according to an embodiment of the present utility model includes a housing 10, a plurality of battery modules 20, and at least one cooling module 30.

[0039] The housing 10 defines a receiving cavity 103. The battery modules 20 are disposed in the receiving cavity 103. The battery modules 20 include a plurality of battery cells 21 arranged in a first direction. The plurality of battery modules 20 are arranged in a second direction perpendicular to the first direction. The cooling module 30 is disposed between two adjacent battery modules 20 for cooling the battery cells 21.

[0040] Specifically, heat is generated during the charging and discharging process of the battery cells 21, but the working efficiency of the battery cells 21 at high temperatures is relatively low. The cooling module 30 is used to cool the battery cells 21 so that the battery cells 21 are at an appropriate temperature, thereby facilitating the improvement of the charging and discharging efficiency of the battery cells 21.

[0041] Wherein, first engaging portions 31 are provided at both ends of the cooling module 30 in the first direction. The first engaging portions 31 cooperate with the battery cells 21 at both ends of the battery module 20 in the first direction to apply a force towards each other to these two battery cells 21, thereby being able to tension the plurality of battery cells 21 in the first direction so that the plurality of battery cells 21 form a battery module 20, so as to utilize the cooling module 30 to bear the expansion force of the battery cells 21 in the first direction.

[0042] Compared with installing the plurality of battery cells 21 one by one into the receiving cavity 103, the step of tensioning the plurality of battery cells 21 and then installing the battery module 20 into the receiving cavity 103 is simpler.

[0043] In the prior art, it is necessary to separately provide a plurality of tension plates 42 to tension a plurality of battery cells 21. In the present application, by providing a first mating portion 31 on the cooling module 30, while the cooling module 30 cools the battery cells 21, it can also tension the plurality of battery cells 21 in the first direction, enabling the cooling module 30 to function as the tension plate 42. In this way, it is not necessary to separately provide the tension plate 42 or the number of tension plates 42 in the battery pack 1 can be reduced, which is convenient for reducing the number of components in the battery pack 1, convenient for releasing the space in the battery pack 1, reserving a larger space for the battery cells 21, and thus facilitating the increase of the capacity of the battery pack 1.

[0044] Therefore, for the battery pack 1 according to the embodiment of the present invention, by providing the first mating portion 31 on the cooling module 30, while the cooling module 30 cools the battery cells 21, it can also tension the plurality of battery cells 21 in the first direction, enabling the cooling module 30 to function as the tension plate 42. In this way, it is not necessary to separately provide the tension plate 42 or the number of tension plates 42 in the battery pack 1 can be reduced, which is convenient for reducing the number of components in the battery pack 1, convenient for releasing the space in the battery pack 1, and reserving a larger space for the battery cells 21.

[0045] Next, the battery pack 1 according to specific embodiments of the present invention will be described with reference to the drawings.

[0046] In some specific embodiments of the present invention, as Figures 1 - 4 shown, the battery pack 1 includes a housing 10, a plurality of battery modules 20, and at least one cooling module 30.

[0047] In some embodiments of the present invention, as Figure 4 、 Figure 5 shown, the cooling module 30 includes a heat exchange plate 301 and a temperature equalizing plate 302. The heat exchange plate 301 has a heat exchange flow channel for placing a heat exchange medium. The heat exchange plate 301 exchanges heat with the battery module 20. When the heat exchange medium flows in the heat exchange flow channel, the heat exchange medium can drive the heat on the battery module 20, thereby cooling the battery cells 21.

[0048] The temperature equalizing plate 302 is stacked with the heat exchange plate 301 and exchanges heat with the battery module 20 to use the temperature equalizing plate 302 to uniformly transfer the heat generated by the battery cells 21 to the heat exchange plate 301, thereby realizing uniform heat exchange of the battery module 20 and facilitating the improvement of the heat exchange efficiency of the cooling module 30.

[0049] In some alternative embodiments of the present invention, as Figure 1 、 Figure 5As shown, a liquid inlet interface 121 and a liquid outlet interface 122 are provided on the first side wall 11 of the housing 10. The liquid inlet interface 121 is communicated with the inlet of the heat exchange flow channel, and the liquid outlet interface 122 is communicated with the outlet of the heat exchange flow channel. The heat exchange medium enters the heat exchange flow channel through the liquid inlet interface 121, and the heat exchange medium in the heat exchange flow channel flows out from the liquid outlet interface 122, so as to realize the flow of the heat exchange medium in the heat exchange flow channel, and further use the heat exchange medium to take away the heat on the heat exchange plate 301 to cool the battery cell 21.

[0050] In some embodiments, as Figure 4 、 Figure 5 shown, the battery pack 1 includes a first cooling module and a second cooling module. The first cooling module and the second cooling module are arranged along the second direction. The first cooling module includes a first heat exchange plate and a first temperature equalizing plate, and the second cooling module includes a second heat exchange plate and a second temperature equalizing plate.

[0051] The heat exchange plate 301 includes a first docking portion 321 and a second docking portion 322. The first docking portion 321 defines the inlet of the heat exchange flow channel, and the second docking portion 322 defines the outlet of the heat exchange flow channel. The liquid inlet interface 121 is docked with the first docking portion 321 of the first heat exchange plate and the first docking portion 321 of the second heat exchange plate through the first pipeline 46, and the liquid outlet interface 122 is docked with the second docking portion 322 of the first heat exchange plate and the second docking portion 322 of the second heat exchange plate through the second pipeline 47, so as to realize the flow of the heat exchange medium in the heat exchange flow channel of the first heat exchange plate and the flow of the heat exchange medium in the heat exchange flow channel of the second heat exchange plate.

[0052] In some alternative embodiments of the present invention, as Figure 4 shown, the temperature equalizing plate 302 is provided with first mating portions 31 at both ends in the first direction. The first mating portions 31 of the temperature equalizing plate 302 cooperate with the battery cells 21 of the adjacent battery module 20 to tension a plurality of battery cells 21 in the adjacent battery module 20 along the first direction, so that the plurality of battery cells 21 form a whole, and the temperature equalizing plate 302 is used to bear the expansion force of the battery cells 21 along the first direction.

[0053] In some embodiments, as Figure 2 、 Figure 4 shown, the second direction extends along the up and down direction (it should be understood that the above direction definition is only for facilitating the description of the drawings and will not limit the actual installation position and direction of the battery pack 1). The battery pack 1 includes a first battery module, a second battery module and a third battery module. The battery pack 1 further includes a first cooling module and a second cooling module. The first cooling module is located between the first battery module and the second battery module, and the second cooling module is located between the second battery module and the third battery module.

[0054] The first cooling module includes a first heat pipe plate which is located below the first battery module. The second cooling module includes a second heat pipe plate which is located above the third battery module.

[0055] In some embodiments, first mating portions 31 are provided on both the first heat pipe plate and the second heat pipe plate.

[0056] Wherein, the first mating portions 31 are respectively provided at two ends of the first heat pipe plate in the first direction. The first mating portions 31 are formed as flanges, and the first mating portions 31 of the first heat pipe plate extend upward to be in contact with the side walls of the battery cells 21 at two ends of the first battery module in the first direction, so as to apply a tensile force to the plurality of battery cells 21.

[0057] The first mating portions 31 are respectively provided at two ends of the second heat pipe plate in the first direction. The first mating portions 31 are formed as flanges, and the first mating portions 31 of the second heat pipe plate extend downward to be in contact with the side walls of the battery cells 21 at two ends of the third battery module in the first direction, so as to apply a tensile force to the plurality of battery cells 21.

[0058] In some other embodiments, it may be that only the first heat pipe plate is provided with the first mating portions 31, and the second heat pipe plate is not provided with the first mating portions 31. In still some other examples, the second heat pipe plate is provided with the first mating portions 31, and the first heat pipe plate is not provided with the first mating portions 31.

[0059] In some alternative embodiments of the present utility model, as Figure 4 shown, the heat exchange plate 301 is provided with the first mating portions 31 at two ends in the first direction. The first mating portions 31 of the heat exchange plate 301 cooperate with the battery cells 21 of the adjacent battery module 20 to tension the plurality of battery cells 21 in the adjacent battery module 20 in the first direction, so that the plurality of battery cells 21 form a whole, and the heat exchange plate 301 is used to bear the expansion force of the battery cells 21 in the first direction.

[0060] In some embodiments, the second direction extends in the up - down direction. The battery pack 1 includes a first battery module, a second battery module and a third battery module. The battery pack 1 further includes a first cooling module and a second cooling module. The first cooling module is located between the first battery module and the second battery module, and the second cooling module is located between the second battery module and the third battery module.

[0061] The first cooling module includes a first heat exchange plate which is located above the second battery module. The second cooling module includes a second heat exchange plate which is located below the second battery module.

[0062] In some examples, first mating portions 31 are provided on both the first heat exchange plate and the second heat exchange plate.

[0063] Specifically, at both ends of the first heat exchange plate in the first direction, first mating portions 31 are respectively provided. The first mating portions 31 are formed as flanges, and the first mating portions 31 of the first heat exchange plate extend downward to be in contact with the upper sidewalls of the battery cells 21 at both ends of the second battery module in the first direction, thereby applying a tensile force to the plurality of battery cells 21.

[0064] At both ends of the second heat exchange plate in the first direction, first mating portions 31 are respectively provided. The first mating portions 31 are formed as flanges, and the first mating portions 31 of the second heat exchange plate extend upward to be in contact with the lower sidewalls of the battery cells 21 at both ends of the third battery module in the first direction, thereby applying a tensile force to the plurality of battery cells 21.

[0065] In some other examples, the first heat exchange plate is provided with the first mating portions 31, and the second heat exchange plate is not provided with the first mating portions 31. In still some other examples, the second heat exchange plate is provided with the first mating portions 31, and the first heat exchange plate is not provided with the first mating portions 31.

[0066] In some alternative embodiments of the present invention, as Figure 2 、 Figure 4 shown, the battery pack 1 includes three battery modules 20. A cooling module 30 is provided between every two adjacent battery modules 20. The battery module 20 located in the middle exchanges heat with the heat exchange plates 301 on both end faces in the second direction, and the battery modules 20 located on both sides exchange heat with the corresponding temperature equalizing plates 302. This facilitates balancing the cooling efficiency of the two cooling modules 30 for the three battery modules 20 and avoids the situation where the cooling efficiency of one of the three battery modules 20 by one of the two cooling modules 30 is too low.

[0067] Specifically, the heat exchange plate 301 has heat exchange channels. Therefore, the surface of the heat exchange plate 301 for exchanging heat with the battery module 20 is uneven, and the heat exchange efficiency between the heat exchange plate 301 and the battery module 20 is relatively low. The surface of the temperature equalizing plate 302 for exchanging heat with the battery module 20 is a flat surface, and the heat exchange efficiency between the temperature equalizing plate 302 and the battery module 20 is relatively high.

[0068] Therefore, by using two heat exchange plates 301 to cool the battery module 20 in the middle layer and using one temperature equalizing plate 302 to cool the corresponding one battery module 20, it is convenient to balance the cooling efficiency of the two cooling modules 30 for the three battery modules 20.

[0069] In some embodiments, as Figure 2As shown, the second direction extends in the up and down direction. The battery pack 1 includes a first battery module, a second battery module, and a third battery module. The battery pack 1 further includes a first cooling module and a second cooling module. The first cooling module is located between the first battery module and the second battery module, and the second cooling module is located between the second battery module and the third battery module. The first cooling module includes a first heat exchange plate and a first temperature equalizing plate, and the second cooling module includes a second heat exchange plate and a second temperature equalizing plate.

[0070] From top to bottom are the first battery module, the first temperature equalizing plate, the first heat exchange plate, the second battery module, the second heat exchange plate, the second temperature equalizing plate, and the third cooling module 30.

[0071] The battery cells 21 in the second battery module are cooled by the first heat exchange plate and the second heat exchange plate. The battery cells 21 in the first battery module are cooled by the first temperature equalizing plate, and the battery cells 21 in the third cooling module 30 are cooled by the second temperature equalizing plate to balance the cooling efficiency of the two cooling modules 30 for the three battery modules 20.

[0072] In some embodiments of the present utility model, as Figure 6 shown, at least one heat conducting pad 41 is provided between adjacent battery modules 20 and cooling modules 30. A glue application space for filling a heat conducting glue layer is defined among the heat conducting pad 41, the battery module 20, and the cooling module 30. The heat conducting glue layer is used to glue the adjacent battery module 20 and cooling module 30 together. At the same time, both the cooling module 30 and the battery module 20 perform heat exchange with the heat conducting glue layer and the heat conducting pad 41 so that the cooling module 30 can cool the battery module 20.

[0073] Among them, a heat conducting pad 41 is provided between the battery module 20 and the cooling module 30 to enable the heat conducting glue layer to be evenly distributed between the battery module 20 and the cooling module 30, avoiding the situation where the heat conducting glue layer is thicker in some areas and thinner in some areas.

[0074] In some embodiments, as Figure 5 shown, the heat exchange plate 301 includes a first docking portion 321 and a second docking portion 322. The first docking portion 321 defines the inlet of the heat exchange flow channel, and the second docking portion 322 defines the outlet of the heat exchange flow channel. Because the first docking portion 321 and the second docking portion 322 are provided, part of the energy of the heat exchange medium will be lost when it is in the first docking portion 321 and the second docking portion 322.

[0075] Among them, the heat exchange efficiency of the heat conducting pad 41 is higher than that of the heat conducting glue layer. By providing the heat conducting pad 41 between the battery module 20 and the cooling module 30, the energy loss at the first docking portion 321 and the second docking portion 322 is compensated, and the heat exchange efficiency between the cooling module 30 and the battery module 20 is improved.

[0076] In addition, the first docking portion 321 and the second docking portion 322 can be used to support the battery cell 21.

[0077] In some examples, a heat insulating cotton is provided between the battery module 20 and the inner wall of the accommodation cavity 103. The heat insulating cotton can wrap the first docking portion 321 and the second docking portion 322 to reduce the energy loss at the first docking portion 321 and the second docking portion 322.

[0078] In some embodiments of the present utility model, such as Figure 4 、 Figure 5 shown, the battery pack 1 further includes a pull plate 42. In the second direction, the pull plate 42 and the cooling module 30 are located on both sides of the battery module 20. Second engaging portions 421 are provided at both ends of the pull plate 42 in the first direction. The second engaging portions 421 cooperate with the battery cells 21 at both ends of the battery module 20 in the first direction to apply a force towards each other to these two battery cells 21, so as to be able to tighten the plurality of battery cells 21 in the first direction, so that the plurality of battery cells 21 form a battery module 20, and the pull plate 42 is used to bear the expansion force of the battery cells 21 in the first direction.

[0079] In some embodiments, such as Figure 2 shown, the second direction extends in the up and down direction. The battery pack 1 includes a first battery module, a second battery module and a third battery module. The battery pack 1 further includes a first cooling module and a second cooling module. The first cooling module is located between the first battery module and the second battery module, and the second cooling module is located between the second battery module and the third battery module.

[0080] The first cooling module is provided with a first engaging portion 31. The first engaging portion 31 on the first cooling module extends upward. The first cooling module tightens the plurality of battery cells 21 in the first battery module from below. The second cooling module is provided with a first engaging portion 31. The first engaging portion 31 on the second cooling module extends upward. The second cooling module tightens the plurality of battery cells 21 in the second battery module from below.

[0081] The pull plate 42 is located above the first battery module. One second engaging portion 421 is provided at each end of the pull plate 42 in the first direction. The second engaging portion is formed as a flanging and the second engaging portion 421 extends downward. The pull plate 42 tightens the plurality of battery cells 21 in the first battery module from above.

[0082] In some alternative embodiments of the present utility model, such as Figure 4 、 Figure 5As shown, the battery pack 1 further includes end plates 15. One end plate 15 is provided at each of the two ends of each battery module 20 in the first direction. A plurality of battery cells 21 in each battery module 20 are located between the two end plates 15. The first engaging portion 31 is fixed to the corresponding end plate 15 to apply a force towards each other to these two end plates 15, and then apply a tension force to the plurality of battery cells 21 through the end plates 15, so as to utilize the cooling module 30 to bear the expansion force of the battery cells 21 in the first direction.

[0083] The second engaging portion 421 is fixed to the corresponding end plate 15 to apply a force towards each other to these two end plates 15, and then apply a tension force to the plurality of battery cells 21 through the end plates 15, so as to utilize the tension plate 42 to bear the expansion force of the battery cells 21 in the first direction.

[0084] In some embodiments, the first fastener passes through the first engaging portion 31 and the corresponding end plate 15 in the first direction to detachably fix the first engaging portion 31 and the end plate 15 together. The second fastener passes through the second engaging portion 421 and the corresponding end plate 15 in the first direction to detachably fix the second engaging portion 421 and the end plate 15 together.

[0085] In other embodiments, the first engaging portion 31 and the corresponding end plate 15 are fixed together by welding, and the second engaging portion 421 and the corresponding end plate 15 are fixed together by welding.

[0086] In some specific embodiments of the present utility model, as Figure 2 shown, the housing 10 includes a box body 101 and a lower support plate 102. The box body 101 and the lower support plate 102 define an accommodation cavity 103. The box body 101 and the lower support plate 102 are detachably connected together. The battery pack 1 includes a first battery module, a second battery module, and a third battery module. The battery pack 1 further includes a first cooling module and a second cooling module. The first cooling module is located between the first battery module and the second battery module, and the second cooling module is located between the second battery module and the third battery module.

[0087] The first battery module and the first cooling module are fixedly connected together through a thermal conductive adhesive layer. The second battery module and the second cooling module are fixedly connected together through a thermal conductive adhesive layer. The third battery module is fixed on the lower support plate 102 through an adhesive layer.

[0088] Wherein, by removing the thermal conductive adhesive layer and the adhesive layer, the separate first battery module, second battery module, and third battery module can be obtained, and the separate first cooling module and second cooling module can be obtained, which is convenient for subsequent separate replacement of the first battery module, second battery module, and third battery module, and separate replacement of the first cooling module and second cooling module.

[0089] In some embodiments, asFigure 6 As shown, a spacer 48 is provided between the third battery module and the lower support plate 102. A glue application space for filling the connection glue layer is defined among the spacer 48, the third battery module, and the lower support plate 102, so that the connection glue layer can be evenly distributed between the third battery module and the lower support plate 102, avoiding the situation where the connection glue layer is thicker in some areas and thinner in some areas.

[0090] In some embodiments of the present invention, as Figure 2 , Figure 7 shown, the battery pack 1 further includes a detection module. The detection module is at least used to collect voltage and temperature data of the battery module 20 to monitor the situation of the battery module 20, and then promptly detect when a battery module 20 has an abnormality, which is convenient for improving the safety of using the battery pack 1.

[0091] The detection module includes a plurality of first acquisition components 51 and a plurality of second acquisition components 52.

[0092] The plurality of first acquisition components 51 are arranged in one-to-one correspondence with the plurality of battery modules 20. Each first acquisition component 51 extends along the first direction to cover a plurality of battery cells 21 in the battery module 20. The first acquisition component 51 is located at one end of the battery module 20 in the third direction and is electrically connected to the plurality of battery cells 21 of the corresponding battery module 20.

[0093] The plurality of second acquisition components 52 are arranged in one-to-one correspondence with the plurality of battery modules 20. The second acquisition component 52 extends along the first direction to cover a plurality of battery cells 21 in the battery module 20. The second acquisition component 52 is located at the other end of the battery module 20 in the third direction and is electrically connected to the plurality of battery cells 21. The second acquisition component 52 communicates with the first acquisition component 51, and the third direction is perpendicular to the first direction and the second direction respectively.

[0094] Briefly speaking, a first acquisition component 51 is provided at one end of each battery module 20 in the third direction, and a second acquisition component 52 is provided at the other end. The second acquisition component 52 can obtain the information collected by the first acquisition component 51. By analyzing the total information collected by the second acquisition component 52, the voltage and temperature data of the corresponding battery module 20 can be obtained. In this way, multiple battery modules 20 can be monitored separately, so that when an abnormal situation occurs, it can be quickly determined which one of the multiple battery modules 20 has a problem, which is convenient for quick repair and improving the safety of use.

[0095] Among them, the temperature and voltage of the battery module 20 can be monitored while assembling the battery pack 1. In this way, when an abnormal battery module 20 is installed in the accommodation cavity 103, it can be promptly detected, avoiding the need for re-disassembly after assembly.

[0096] In some embodiments, the first acquisition member 51 is electrically connected to the outer casing of the battery cell 21, and the second acquisition member 52 is electrically connected to the outer casing of the battery cell 21 to enable communication between the first acquisition member 51 and the second acquisition member 52.

[0097] In some alternative embodiments of the present utility model, as Figure 7 shown, the plurality of second acquisition members 52 are connected by wires, and an external interface 522 is provided on one of the second acquisition members 52. The external interface 522 is used to output the total information collected by the plurality of second acquisition members 52 outward, so as to monitor the voltage and temperature of the battery module 20 through the information output by the external interface 522.

[0098] In some embodiments, the plurality of second acquisition members 52 are disposed on the same side of the corresponding battery module 20, which facilitates connecting the plurality of second acquisition members 52 by wires and reduces the complexity of wire connection.

[0099] In some specific embodiments of the present utility model, as Figure 7 shown, the first acquisition member 51 includes a plurality of first circuit boards 511 arranged in a row, and each first circuit board 511 is communicatively connected to the second acquisition member 52. This facilitates shortening the length of the first circuit board 511 in the first direction. Compared with a single longer first circuit board 511, it is easier to implement and has a lower cost to provide a plurality of shorter first circuit boards 511.

[0100] In some embodiments, the first circuit board 511 is a flexible circuit board or a printed circuit board.

[0101] In some specific embodiments of the present utility model, the second acquisition member 52 is a plurality of second circuit boards 521 arranged in a row, and the plurality of second circuit boards 521 are electrically connected by wires. This facilitates shortening the length of the second circuit board 521 in the first direction. Compared with a single longer second circuit board 521, it is easier to implement and has a lower cost to provide a plurality of shorter second circuit boards 521.

[0102] In some embodiments, the second circuit board 521 is a printed circuit board.

[0103] Among them, due to process limitations, the length of the printed circuit board cannot be set too large. The present invention overcomes the process limitations by providing two second circuit boards 521 without using an overly long printed circuit board.

[0104] In some specific embodiments of the present utility model, the first side wall 11 of the housing 10 has an avoidance opening for avoiding the external interface 522, so as to facilitate the docking of external parts with the external interface 522, so that the total information collected by the second acquisition member 52 can be obtained without disassembling the battery pack 1.

[0105] In some embodiments of the present utility model, as Figure 8 shown, the battery pack 1 further includes a plurality of first electrical connection pieces 61. The first electrical connection pieces 61 are used to connect the positive and negative electrodes of two adjacent battery cells 21 within the battery module 20, so as to connect the plurality of battery cells 21 within the battery module 20 in series.

[0106] The battery pack 1 further includes a plurality of second electrical connection pieces 62. The second electrical connection pieces 62 are used to connect the positive and negative electrodes of two adjacent battery modules 20, so as to connect the plurality of battery modules 20 in series to form an integral battery. The battery formed by the plurality of battery modules 20 has a positive electrode and a negative electrode.

[0107] The battery pack 1 further includes two third electrical connection pieces 63. One end of one of the third electrical connection pieces 63 is connected to the positive electrode of the battery, and the other end is connected to the positive electrode terminal 64 of the battery pack 1. One end of the other third electrical connection piece 63 is connected to the positive electrode of the battery, and the other end is connected to the negative electrode terminal 65 of the battery pack 1.

[0108] Wherein, the positive electrode terminal 64 and the negative electrode terminal 65 are provided on the first side wall 11 of the housing 10 to achieve charging and discharging of the battery pack 1.

[0109] In summary, the positive electrode terminal 64 and the negative electrode terminal 65 are provided on the first side wall 11 of the housing 10, the external interface 522 is provided on the first side wall 11 of the housing 10, the liquid inlet interface 121 and the liquid outlet interface 122 are provided on the first side wall 11 of the housing 10. By integrating the parts of the battery pack 1 that need to cooperate with external parts on the first side wall 11 of the housing 10, the space utilization rate is improved, and the use of the battery pack 1 is facilitated.

[0110] In some embodiments, a fuse 66 is provided on the third electrical connection piece 63 connecting the positive electrode terminal. When the current in the battery is abnormal, the fuse 66 is blown to disconnect the circuit.

[0111] In some embodiments of the present utility model, as Figure 2 shown, the battery pack 1 further includes a plurality of plastic brackets 71. The plastic brackets 71 are provided in the accommodation cavity 103. The plastic brackets 71 define a placement cavity, and the battery module 20 is provided in the corresponding placement cavity, so as to use the plastic brackets 71 to provide heat insulation and insulation protection for the battery module 20.

[0112] In some embodiments of the present utility model, the housing 10 is made of a phase change material or a polypropylene material to meet the requirements of high strength and high flame retardancy of the battery pack 1.

[0113] The electrical equipment according to the embodiments of the present utility model is described below. The electrical equipment according to the embodiments of the present utility model includes the battery pack 1 according to the above embodiments of the present utility model.

[0114] The electrical equipment according to the embodiment of the present utility model utilizes the battery pack 1 according to the above embodiment of the present utility model, and a first mating portion 31 is provided on the cooling module 30. While the cooling module 30 cools the battery cells 21, it can also tension a plurality of battery cells 21 in the first direction, enabling the cooling module 30 to function as the tension plate 42. In this way, there is no need to separately provide the tension plate 42 or the number of tension plates 42 in the battery pack 1 can be reduced, which is convenient for reducing the number of components of the battery pack 1, facilitating the release of the space inside the battery pack 1, and reserving a larger space for the battery cells 21.

[0115] The other configurations and operations of the electrical equipment according to the embodiment of the present utility model are known to those of ordinary skill in the art and will not be described in detail here.

[0116] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present utility model. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more. In the description of the present utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween.

[0117] In the description of the present utility model, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature.

[0118] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0119] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0120] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that: include: A housing (10), wherein the housing (10) defines a receiving chamber (103); a plurality of battery modules (20), the battery modules (20) being arranged in the accommodating cavity (103), the battery modules (20) comprising a plurality of battery cells (21) arranged along a first direction, the plurality of battery modules (20) being arranged along a second direction, the second direction being perpendicular to the first direction; at least one cooling module (30), the cooling module (30) being arranged between two adjacent battery modules (20) and being used for cooling the battery cells (21), The cooling module (30) is provided with first matching parts (31) at both ends in the first direction, and the first matching parts (31) match with the battery cells (21) at both ends of the battery module (20) in the first direction, so as to apply a force acting on the two battery cells (21) toward each other.

2. The battery pack according to claim 1, characterized in that: The cooling module (30) comprises: A heat exchange plate (301), the heat exchange plate (301) having a heat exchange flow channel for placing a heat exchange medium, the heat exchange plate (301) exchanging heat with the battery module (20); A temperature averaging plate (302), the temperature averaging plate (302) performs heat exchange with the battery module (20) and is stacked with the heat exchange plate (301).

3. The battery pack according to claim 2, characterized in that: A liquid inlet interface (121) and a liquid outlet interface (122) are provided on the first side wall (11) of the shell (10); the liquid inlet interface (121) is connected to the inlet of the heat exchange channel, and the liquid outlet interface (122) is connected to the outlet of the heat exchange channel.

4. The battery pack according to claim 2, characterized in that: The temperature averaging plate (302) is provided with the first matching parts (31) at both ends in the first direction, and the first matching parts (31) of the temperature averaging plate (302) match with the battery cells (21) of the battery modules (20) adjacent thereto; And\or, the heat exchange plate (301) is provided with the first matching portion (31) at both ends in the first direction, and the first matching portion (31) of the heat exchange plate (301) matches with the battery cell (21) of the battery module (20) adjacent thereto.

5. The battery pack according to claim 2, characterized in that: The battery module (20) comprises three battery modules (20), wherein the cooling module (30) is arranged between each two adjacent battery modules (20), the battery module (20) located in the middle performs heat exchange with the heat exchange plate (301) at both end surfaces in the second direction, and the battery modules (20) located on both sides perform heat exchange with the corresponding temperature averaging plates (302).

6. The battery pack according to claim 1, characterized in that: At least one thermally conductive pad (41) is provided between adjacent battery modules (20) and cooling modules (30), and a coating space for filling a thermally conductive adhesive layer is defined between the thermally conductive pad (41), the battery module (20) and the cooling module (30).

7. The battery pack according to claim 1, characterized in that: The invention also comprises a pulling plate (42), wherein in the second direction, the pulling plate (42) and the cooling module (30) are located on both sides of the battery module (20), and the pulling plate (42) is provided with second matching parts (421) at both ends along the first direction, and the second matching parts (421) match with the battery cells (21) at both ends of the battery module (20) in the first direction, and are used to apply a force toward each other to the two battery cells (21).

8. The battery pack according to claim 1, characterized in that: It also includes a detection module, which is used at least to collect voltage and temperature data of the battery module (20), and the detection module includes: a plurality of first collecting members (51), the plurality of first collecting members (51) being arranged in one-to-one correspondence with the plurality of battery modules (20), each of the first collecting members (51) extending along the first direction, the first collecting member (51) being located at one end of the battery module (20) in the third direction and being electrically connected to the plurality of battery cells (21) of the corresponding battery module (20); A plurality of second collecting members (52) are arranged one by one with the plurality of battery modules (20); the second collecting members (52) extend along the first direction; the second collecting members (52) are located at the other end of the battery module (20) in a third direction and are electrically connected to the plurality of battery cells (21); the second collecting members (52) communicate with the first collecting members (51); and the third direction is arranged perpendicular to the first direction and the second direction respectively.

9. The battery pack according to claim 8, characterized in that: A plurality of the second collecting components (52) are connected via wires, and one of the second collecting components (52) is provided with an external interface (522).

10. The battery pack according to claim 9, characterized in that: The first collecting component (51) comprises a plurality of first circuit boards (511) arranged in an array, each of the first circuit boards (511) being communicatively connected to the second collecting component (52); and / or the second collecting component (52) comprises a plurality of second circuit boards (521) arranged in an array, the plurality of second circuit boards (521) being electrically connected via wires.

11. The battery pack according to claim 10, characterized in that: The first circuit board (511) is a flexible circuit board or a printed circuit board, and the second circuit board (521) is a printed circuit board.

12. The battery pack according to claim 9, characterized in that: The first side wall (11) of the housing (10) is provided with an escape opening for escaping the external interface (522).

13. An electrical equipment, characterized in that: A battery pack comprising any one of claims 1-12.

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