Battery pack

Abstract

The utility model discloses a battery pack, which comprises a shell assembly, a battery pack and a battery pack, the multiple cross beams are arranged in the containing cavity and are arranged at intervals in the first direction; the battery cell modules are arranged between any two adjacent cross beams, and each battery cell module comprises a first module and a second module which are mutually stacked in a second direction; the first cold plate is arranged in the containing cavity, the first cold plate is located between the first module and the second module and penetrates through the multiple cross beams, and the first direction is perpendicular to the second direction. The battery pack disclosed by the utility model can meet the required electric quantity requirement, and is compact in structure, high in space utilization rate and high in safety.

Description

Technical Field

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

[0002] In the related art, one of the double-layer modules of the battery pack is supported by a bracket, which makes the internal structure of the battery pack complicated, and the bracket increases the occupied space, resulting in low space utilization and increased weight of the battery pack. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a battery pack that can meet the required power demand and has a compact structure, high space utilization and high safety.

[0004] According to the battery pack of the embodiment of the utility model, it includes: a shell assembly, the shell assembly has a accommodating cavity; a plurality of beams, the plurality of beams are arranged in the accommodating cavity and are arranged at intervals along a first direction; a plurality of battery cell modules, the battery cell module is arranged between any two adjacent beams, the battery cell module includes a first module and a second module stacked on each other in a second direction; a first cold plate, the first cold plate is arranged in the accommodating cavity, the first cold plate is located between the first module and the second module and passes through the plurality of beams, wherein the first direction is perpendicular to the second direction.

[0005] According to the battery pack of the embodiment of the utility model, a plurality of beams are arranged at intervals along the first direction, and a cell module is arranged between any two adjacent beams, which can reduce the space required for the end plate, improve the space utilization of the battery pack, and make full use of the internal volume of the battery pack. The cell module includes a first module and a second module stacked on each other in the second direction, and the first cold plate is located between the first module and the second module and is passed through a plurality of beams, which is conducive to increasing the power of the battery pack, meeting the power demand of the battery pack, achieving the support and heat exchange requirements for the first module or the second module, ensuring the compactness of the internal structure of the battery pack, and improving the thermal management performance and safety performance of the battery pack. At the same time, the first cold plate and the plurality of beams can realize the mutual isolation of the plurality of first modules and the plurality of second modules in the first direction and the second direction, delaying or preventing the influence of thermal runaway of one of the first modules or the second module on other structures, and improving the safety of the battery pack.

[0006] In addition, the battery pack according to the above embodiment of the utility model may also have the following additional technical features:

[0007] According to the battery pack of some embodiments of the present invention, both ends of the first cold plate in the third direction extend beyond both ends of the battery cell module in the third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other.

[0008] According to some embodiments of the present invention, the first module and the second module are adhesively connected to the first cold plate.

[0009] According to some embodiments of the utility model, the battery pack includes a connector, and the accommodating cavity includes: a first cavity, in which the battery cell module is disposed; a second cavity, in which the second cavity is located on one side of the first cavity in the first direction, and the first cavity and the second cavity are separated by the cross beam, and the connector is disposed in the second cavity.

[0010] According to some embodiments of the present utility model, the shell assembly includes: a first shell, and a plurality of the beams are spaced apart on the first shell along the first direction; and a second shell, which is covered on the first shell and defines the accommodating cavity together with the first shell.

[0011] According to some embodiments of the utility model, the plurality of beams include: a first sub-beam and a second sub-beam, the first sub-beam and the second sub-beam are respectively located on both sides of the thickness direction of the first cold plate, and the first sub-beam and the second sub-beam are connected to each other, the first sub-beam and the first module are opposite to each other in the first direction, the second sub-beam and the second module are opposite to each other in the first direction, and an end of the second sub-beam away from the first sub-beam is connected to the first shell.

[0012] According to some embodiments of the present invention, the second sub-crossbeam and the first shell are connected by a first fastener; and / or the second sub-crossbeam and the first shell are adhesively connected.

[0013] According to some embodiments of the utility model, when the second sub-beam and the first shell are connected by a first fastener, a first avoidance hole for avoiding the first fastener is provided on the bottom wall of the first shell, and a groove surrounding the first avoidance hole is provided on the side of the first shell away from the battery cell module, a second seal is provided in the groove, and the first fastener abuts against the second seal.

[0014] A cooling channel is provided on the first cold plate, and an avoidance groove for avoiding the cooling channel is provided on at least one of an end of the first sub-beam facing the first cold plate and an end of the second sub-beam facing the first cold plate; and / or the first sub-beam and the second sub-beam are connected by a second fastener, and a second avoidance hole for avoiding the second fastener is provided on the first cold plate.

[0015] According to some embodiments of the present invention, a third cold plate is provided between the second shell on one side of the second direction facing the battery cell module and the battery cell module.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 is an exploded view of a battery pack according to an embodiment of the utility model;

[0019] Figure 2 is a cross-sectional view of a battery pack according to an embodiment of the utility model;

[0020] Figure 3 is a front view of a battery pack according to an embodiment of the utility model (wherein the second housing is not shown);

[0021] Figure 4 is a front view of a battery pack according to an embodiment of the utility model (wherein the second housing and the battery cell module are not shown);

[0022] Figure 5 yes Figure 4 A cross-sectional view along the direction indicated by line AA;

[0023] Figure 6 It is a schematic structural diagram of the cooperation between the bottom plate, the second sub-beam and the first fastener of the battery pack according to an embodiment of the utility model.

[0024] Reference numerals:

[0025] 100. Battery pack;

[0026] 10. Shell assembly; 11. Accommodating cavity; 111. First cavity; 112. Second cavity;

[0027] 20. cross beam; 21. first sub-cross beam; 22. second sub-cross beam; 23. avoidance groove;

[0028] 30. Battery cell module; 31. First module; 32. Second module;

[0029] 41. first cold plate; 42. second cold plate; 43. third cold plate; 411. cooling channel; 412. second avoidance hole;

[0030] 50. Connectors;

[0031] 61. first shell; 62. second shell; 611. bottom plate; 612. side plate; 613. first avoidance hole; 614. groove;

[0032] 71. first fastener; 72. second fastener; 73. fastener;

[0033] 80. Adhesives;

[0034] 91. A first sealing member; 92. A second sealing member. DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] In the description of the present invention, "first feature" and "second feature" may include one or more such features, "plurality" means two or more, the first feature "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 another feature between them, the first feature "above", "above" and "above" the second feature may include the first feature being directly above and diagonally above the second feature, or may simply mean that the first feature is at a higher level than the second feature.

[0038] A battery pack 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0039] Reference Figure 1-Figure 3 As shown, the battery pack 100 according to the embodiment of the present invention may include: a housing assembly 10 , a plurality of beams 20 and a plurality of battery cell modules 30 .

[0040] Specifically, the shell assembly 10 has a accommodating cavity 11, and a plurality of beams 20 are arranged in the accommodating cavity 11, and the plurality of beams 20 are arranged at intervals along the first direction, and a battery module 30 is provided between any two adjacent beams 20. The battery module 30 can be limited by the beams 20 to ensure that the battery module 30 is reliably fixed in the shell assembly 10, which is beneficial to improving the structural strength and rigidity of the battery pack 100, and the beams 20 can serve as the end plates of the battery module 30, which can eliminate the end plates required for the battery module 30 and reduce the space required for the end plates, thereby improving the space utilization of the battery pack 100 and making full use of the internal volume of the battery pack 100.

[0041] In addition, if Figure 1-Figure 3 As shown, the battery cell module 30 includes a first module 31 and a second module 32. The first module 31 and the second module 32 are stacked on each other in the second direction. The first direction and the second direction are perpendicular, which can meet the requirements of the double-layer module of the battery pack 100 and make full use of the internal space of the battery pack 100, which is beneficial to increase the power of the battery pack 100 and meet the required power requirements of the battery pack 100.

[0042] At the same time, if Figure 2 and Figure 4 As shown, the battery pack 100 also includes a first cold plate 41, which is arranged in the accommodating cavity 11. The first cold plate 41 can be located between the first module 31 and the second module 32, and the first cold plate 41 is penetrated by multiple beams 20. The first cold plate 41 can support the first module 31 or the second module 32 to ensure reliable support. Compared with the related art of supporting the first module or the second module by a bracket, the space occupied by the bracket is reduced, the weight is reduced, and the internal structure of the battery pack 100 is ensured to be compact. The first cold plate 41 can perform heat exchange between the first module 31 and the second module 32 to meet the heat exchange requirements of the battery cell module 30, such as heating or dissipating the battery cell module 30, etc., to ensure the safety of the battery pack 100, which is conducive to improving the thermal management performance and safety performance of the battery pack 100.

[0043] Therefore, the first cold plate 41 and the multiple cross beams 20 can achieve mutual isolation of the multiple first modules 31 and the multiple second modules 32 in the first direction and the second direction, delaying or preventing the impact of thermal runaway of one of the first modules 31 or the second module 32 on other structures, thereby improving the safety of the battery pack 100.

[0044] In the embodiment of the present invention, the number of the cross beams 20 can be flexibly set according to actual conditions. For example, the cross beams 20 can be Figure 1 Three are shown, but there may also be two, four, five, six or more, all of which are within the protection scope of the present utility model.

[0045] In some embodiments, both sides of the crossbeam 20 facing the battery cell module 30 are provided with protective members, and when thermal runaway occurs in the battery pack 100, the protective members can play a protective role to avoid damage to the adjacent battery cell module 30, thereby improving the safety of the battery pack 100. For example, the protective member can be mica paper, and the mica paper can be fixed on the crossbeam 20 by pasting to ensure reliable fixation.

[0046] According to the battery pack 100 of the embodiment of the utility model, a plurality of beams 20 are arranged at intervals along the first direction, and a cell module 30 is provided between any two adjacent beams 20, which can reduce the space occupied by the end plate, improve the space utilization of the battery pack 100, and make full use of the internal volume of the battery pack 100. In addition, the cell module 30 includes a first module 31 and a second module 32 stacked on each other in the second direction, and the first cold plate 41 is located between the first module 31 and the second module 32 and penetrates the plurality of beams 20, which is beneficial to increase the power of the battery pack 100, meet the power demand of the battery pack 100, realize the support and heat exchange demand of the first module 31 or the second module 32, ensure the compactness of the internal structure of the battery pack 100, and improve the thermal management performance and safety performance of the battery pack 100. At the same time, the first cold plate 41 and the multiple cross beams 20 can realize mutual isolation of the multiple first modules 31 and the multiple second modules 32 in the first direction and the second direction, delaying or preventing the impact of thermal runaway of one of the first modules 31 or the second module 32 on other structures, thereby improving the safety of the battery pack 100.

[0047] In some embodiments of the present invention, Figure 2 As shown, both ends of the first cold plate 41 in the third direction extend beyond both ends of the battery cell module 30 in the third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other, which can effectively increase the contact area between the first cold plate 41 and the battery cell module 30, improve the heat dissipation efficiency, and make the isolation of the first module 31 and the second module 32 in the second direction reliable, effectively delay or prevent the influence of thermal runaway of one of the first modules 31 or the second module 32 on other structures, thereby improving the safety of the battery pack 100.

[0048] According to some embodiments of the utility model, the first module 31 and the second module 32 are bonded to the first cold plate 41, which can improve the connection stability between the battery module 30 and the first cold plate 41, thereby improving the structural strength inside the battery pack 100, ensuring that the internal structural space of the battery pack 100 is compactly utilized, and facilitating heat transfer, ensuring that the first module 31 and the second module 32 have a good heat exchange effect with the first cold plate 41. For example, an adhesive is provided between the first module 31 and the second module 32 and the first cold plate 41 to achieve bonding connection, and the adhesive can be a structural adhesive or a thermally conductive structural adhesive.

[0049] In some embodiments of the present invention, Figure 1 , Figure 3 and Figure 4 As shown, the battery pack 100 includes a connector 50, the accommodating cavity 11 includes a first cavity 111 and a second cavity 112, the battery module 30 is arranged in the first cavity 111, the second cavity 112 is located on one side of the first cavity 111 in the first direction, and the first cavity 111 and the second cavity 112 are separated by a crossbeam 20, and the connector 50 is arranged in the second cavity 112, so that the structure of the battery pack 100 is compact, the space utilization rate is improved, and the crossbeam 20 can effectively delay or prevent the battery module 30 from affecting the connector 50 when thermal runaway occurs, thereby ensuring the safety of the battery pack 100. For example, the connector 50 can be an electrical component, a liquid cooling interface, a control unit, etc.

[0050] According to some embodiments of the present invention, Figure 1 and Figure 2 As shown, the shell assembly 10 includes a first shell 61 and a second shell 62, a plurality of beams 20 are spaced apart on the first shell 61 along a first direction, the second shell 62 is covered on the first shell 61, and the second shell 62 and the first shell 61 define a accommodating cavity 11. The shell assembly 10 can protect the battery module 30 to avoid damage caused by exposure of the battery module 30, which is beneficial to extending the service life of the battery pack 100 and facilitates the placement of the battery module 30.

[0051] In some embodiments, Figure 1-Figure 4 As shown, the first shell 61 includes a bottom plate 611 and two side plates 612, the bottom plate 611 extends along the first direction, the two side plates 612 are connected to the bottom plate 611, and the two side plates 612 are respectively located at both ends of the bottom plate 611 in the first direction, so as to form the first shell 61. Both ends of the second shell 62 in the third direction are bent toward one side of the second direction, the second shell 62 is covered on the first shell 61, and the outer edges of the second shell 62 are connected to the first shell 61, so that the first shell 61 and the second shell 62 can define a receiving cavity 11, and the shell assembly 10 has a simple structure, is easy to process and manufacture, and is conducive to reducing production costs.

[0052] In addition, if Figure 1 and Figure 2 As shown, the two ends of the bottom plate 611 in the third direction are flush with the two ends of the battery module 30 in the third direction, ensuring that the battery module 30 is placed securely on the bottom plate 611, and when the internal space of the shell assembly 10 is the same, it can improve the space utilization of the battery pack 100, ensure that the battery module 30 is compact in structure in the shell assembly 10, and effectively increase the power of the battery pack 100 to meet the power requirements of the battery pack 100.

[0053] In some embodiments, Figure 1 and Figure 2 As shown, the first shell 61 and the second shell 62 are connected by a third fastener 73, ensuring that the first shell 61 and the second shell 62 are reliably fixed and easy to disassemble, so as to facilitate maintenance or replacement of the internal structure of the shell assembly 10.

[0054] In some embodiments, Figure 1 and Figure 2 As shown, there are multiple (greater than or equal to two) third fasteners 73, and the multiple third fasteners 73 extend along the circumferential direction of the second shell 62. The multiple third fasteners 73 can realize the connection between the first shell 61 and the second shell 62 in multiple different directions, ensuring that the first shell 61 and the second shell 62 are reliably connected to avoid loosening and other problems.

[0055] According to some embodiments of the present invention, Figure 1 and Figure 2 As shown, a first sealing member 91 is provided between the outer edge of the first shell 61 and the outer edge of the second shell 62. The first sealing member 91 extends along the circumferential direction of the first shell 61. The first sealing member 91 can seal the gap between the first shell 61 and the second shell 62, thereby forming a good sealing effect, preventing liquid or gas from entering the battery pack 100 from the gap between the first shell 61 and the second shell 62, and ensuring the safety of the battery pack 100. For example, the first sealing member 91 can be a silicon foam member.

[0056] In some embodiments of the present invention, the first seal 91 and the first shell 61 are bonded to ensure that the first seal 91 is reliably fixed on the first shell 61, avoiding problems such as movement of the first seal 91 and ensuring reliable sealing.

[0057] In some embodiments, the first housing 61 and the second housing 62 are connected by the third fastener 73, such as Figure 1As shown, the first seal 91 is located on a side of the first shell 61 away from the outer edge of the first shell 61, and the third fastener 73 is located between the first seal 91 and the outer edge of the first shell 61. The third fastener 73 can reliably fix the first shell 61 and the second shell 62, and the third fastener 73 can avoid the first seal 91 to ensure reliable sealing.

[0058] According to some embodiments of the utility model, a reinforcing rib is provided on the side of the side panel 612 facing the accommodating cavity 11, and the structural strength of the side panel 612 can be strengthened by the reinforcing rib, thereby ensuring the structural strength of the shell assembly 10, avoiding the problem that the side panel 612 is deformed by collision and causes damage to the battery cell module 30, and ensuring the safety of the battery pack 100.

[0059] In some embodiments, the side plate 612 and the bottom plate 611 are welded to ensure that the side plate 612 and the bottom plate 611 are reliably connected, and are easy to process and manufacture, which is beneficial to reducing production costs.

[0060] According to some embodiments of the present invention, Figure 3-Figure 5 As shown, the plurality of beams 20 each include a first sub-beam 21 and a second sub-beam 22. The first sub-beam 21 and the second sub-beam 22 are respectively located in the thickness direction of the first cold plate 41 (eg Figure 2 The first sub-beam 21 and the second sub-beam 22 are connected to each other, the first sub-beam 21 and the first module 31 are opposite to each other in the first direction, the second sub-beam 22 and the second module 32 are opposite to each other in the first direction, and the end of the second sub-beam 22 away from the first sub-beam 21 is connected to the first shell 61, ensuring that the first sub-beam 21 and the second sub-beam 22 are reliably fixed on the first shell 61, and the first sub-beam 21 and the second sub-beam 22 can effectively support the first cold plate 41, ensuring that the first cold plate 41 is reliably fixed in the accommodating cavity 11, and the first sub-beam 21 and the second sub-beam 22 have a simple structure, which is convenient for processing and manufacturing.

[0061] In some embodiments, Figure 6 As shown, the second sub-beam 22 and the first shell 61 are connected by a first fastener 71, ensuring that the second sub-beam 22 is reliably fixed on the first shell 61, which is beneficial to improving the overall structural strength of the battery pack 100 and facilitating disassembly. For example, the first fastener 71 can be a bolt or the like.

[0062] In some embodiments, Figure 6As shown, the second sub-beam 22 and the first shell 61 are bonded to ensure that the second sub-beam 22 is reliably fixed on the first shell 61, avoiding problems such as movement of the second sub-beam 22, and achieving sealing performance. For example, an adhesive 80 is provided between the second sub-beam 22 and the first shell 61 to achieve bonding connection.

[0063] In some embodiments, Figure 6 As shown, the second sub-beam 22 and the first shell 61 are connected by the first fastener 71, and the second sub-beam 22 and the first shell 61 are adhesively connected, which can ensure that the second sub-beam 22 is reliably fixed to the first shell 61, and can meet the sealing requirements of the battery pack 100, avoid liquid or gas from entering the interior of the battery pack 100 from the connection, and ensure the safety of the battery pack 100.

[0064] In some embodiments, the second sub-beam 22 and the first housing 61 are connected by the first fastener 71, such as Figure 6 As shown, a first avoidance hole 613 is provided on the bottom wall of the first shell 61. The first avoidance hole 613 is used to avoid the first fastener 71, so that the first fastener 71 can be easily passed through the first avoidance hole 613 to connect with the second sub-beam 22, ensuring a reliable connection.

[0065] In addition, if Figure 6 As shown, a groove 614 is provided on one side of the first shell 61 away from the battery module 30, and the groove 614 is arranged around the first avoidance hole 613. A second sealing member 92 is arranged in the groove 614, and the first fastener 71 abuts against the second sealing member 92. Therefore, when the first fastener 71 abuts against the second sealing member 92, the second sealing member 92 can be compressed between the first fastener 71 and the first shell 61, thereby forming a good sealing effect, preventing liquid or gas from entering the battery pack 100 from the gap between the second sealing member 92 and the first shell 61, and ensuring the safety of the battery pack 100.

[0066] In some embodiments, Figure 5 As shown, there are multiple (greater than or equal to two) first avoidance holes 613, and the multiple first avoidance holes 613 are spaced apart along the third direction. The multiple first avoidance holes 613 can avoid the multiple first fasteners 71, so that the second sub-beam 22 can be fixed to the first shell 61 through the multiple first fasteners 71, ensuring that the second sub-beam 22 is reliably fixed.

[0067] In some embodiments, Figure 5 As shown, a cooling channel 411 is provided on the first cold plate 41 , and the heat exchange requirement between the first cold plate 41 and the battery cell module 30 can be met through the cooling channel 411 , thereby ensuring reliable heat exchange.

[0068] In addition, if Figure 5As shown, at least one of the end of the first sub-beam 21 facing the first cold plate 41 and the end of the second sub-beam 22 facing the first cold plate 41 is provided with an avoidance groove 23, that is, the end of the first sub-beam 21 facing the first cold plate 41 is provided with the avoidance groove 23, or the end of the second sub-beam 22 facing the first cold plate 41 is provided with the avoidance groove 23, or the end of the first sub-beam 21 facing the first cold plate 41 and the end of the second sub-beam 22 facing the first cold plate 41 are both provided with avoidance grooves 23. The avoidance groove 23 can avoid the cooling channel 411, so as to prevent the crossbeam 20 from interfering with or blocking the cooling channel 411, ensure that the cooling channel 411 can smoothly pass through the entire first cold plate 41, ensure that the liquid in the cooling channel 411 flows smoothly, and is beneficial to improving the heat exchange effect of the battery cell module 30.

[0069] In some embodiments, Figure 5 As shown, the first cold plate 41 is provided with a plurality of (greater than or equal to two) interconnected cooling channels 411 , and the plurality of cooling channels are arranged in sequence in the third direction, which can improve the heat exchange effect of the first cold plate 41 on the battery cell module 30 .

[0070] In addition, if Figure 5 As shown, the avoidance grooves 23 correspond one to one with the multiple cooling channels. The multiple cooling channels can be avoided through the multiple avoidance grooves 23, ensuring that the cooling channel 411 can smoothly pass through the entire first cold plate 41, ensuring the smooth flow of liquid in the cooling channel 411, which is beneficial to improving the heat exchange effect of the battery cell module 30.

[0071] In some embodiments, Figure 5 As shown, the first sub-beam 21 and the second sub-beam 22 are connected by the second fastener 72, which ensures that the first sub-beam 21 and the second sub-beam 22 are connected reliably, which is beneficial to improving the overall structural strength of the battery pack 100. For example, the second fastener 72 can be a long bolt or the like.

[0072] In addition, if Figure 5 As shown, a second avoidance hole 412 is provided on the first cold plate 41, and the second avoidance hole 412 is used to avoid the second fastener 72, so as to avoid the first cold plate 41 from interfering with the second fastener 72, and facilitate the second fastener 72 to pass through the second avoidance hole 412 to realize the connection between the first sub-beam 21 and the second sub-beam 22, thereby ensuring a reliable connection.

[0073] In some embodiments of the present invention, Figure 2 , Figure 5 and Figure 6As shown, a second cold plate 42 is provided between the first shell 61 and the battery module 30 on one side facing the battery module 30 in the second direction. The second cold plate 42 can further improve the heat exchange efficiency of the battery module 30, ensure reliable heat exchange of the battery module 30, and help improve the safety of the battery pack 100.

[0074] In some embodiments, Figure 2 , Figure 5 and Figure 6 As shown, the first shell 61 and the second cold plate 42 are an integrated piece, which is easy to manufacture, has a high connection strength, reduces assembly processes, and has high production efficiency.

[0075] In some embodiments, the first shell 61 and the second cold plate 42 are bonded or welded to ensure that the second cold plate 42 is reliably fixed on the first shell 61 and can meet different processing and manufacturing requirements. For example, the first shell 61 and the second cold plate 42 are bonded by structural adhesive.

[0076] According to some embodiments of the present invention, Figure 1 , Figure 4 and Figure 5 As shown, a third cold plate 43 is provided between the second shell 62 and the battery module 30 on one side facing the battery module 30 in the second direction. The third cold plate 43 can further improve the heat exchange efficiency of the battery module 30, ensure reliable heat exchange of the battery module 30, and help improve the safety of the battery pack 100.

[0077] In some embodiments, the battery pack 100 can be applied to a vehicle. A plurality of cross beams 20 are arranged at intervals along a first direction, and a cell module 30 is provided between any two adjacent cross beams 20. This can reduce the space required for the end plate, improve the space utilization of the battery pack 100, and make full use of the internal volume of the battery pack 100. The cell module 30 includes a first module 31 and a second module 32 stacked on each other in a second direction, and the first cold plate 41 is located between the first module 31 and the second module 32 and penetrates the plurality of cross beams 20. This is beneficial to increase the power of the battery pack 100, meet the power demand of the battery pack 100, realize the support and heat exchange requirements of the first module 31 or the second module 32, ensure the compactness of the internal structure of the battery pack 100, and improve the thermal management performance and safety performance of the battery pack 100. At the same time, the first cold plate 41 and the multiple cross beams 20 can realize mutual isolation of the multiple first modules 31 and the multiple second modules 32 in the first direction and the second direction, delaying or preventing the impact of thermal runaway of one of the first modules 31 or the second module 32 on other structures, thereby improving the safety of the battery pack 100.

[0078] In some embodiments, the vehicle may be a new energy vehicle, which can reduce the pressure on natural resources and the ecological environment, and effectively improve and reduce the pollution of the vehicle to the environment. With the popularization and increase of new energy vehicles, users have higher and higher requirements for the driving range of new energy vehicles. The battery pack 100, as the energy storage and power output device of the new energy vehicle, is the power source of the new energy vehicle and the guarantee of its endurance. Therefore, by applying the battery pack 100 of the utility model to the new energy vehicle, it is possible to make full use of the space of the vehicle, effectively improve the power and driving range, meet the power requirements of the vehicle, and ensure that the structural strength of the battery pack 100 is high, the heat exchange effect is good, and the safety of the battery pack 100 is ensured.

[0079] Other structures and operations of the battery pack 100 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0080] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0081] In the description of this specification, the description with reference to the terms "embodiment", "specific embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0082] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that: include: A housing assembly, wherein the housing assembly has a receiving cavity; A plurality of cross beams, wherein the plurality of cross beams are arranged in the accommodating cavity and are spaced apart along a first direction; A plurality of battery core modules, wherein the battery core modules are disposed between any two adjacent beams, and the battery core modules include a first module and a second module stacked on each other in a second direction; A first cold plate is disposed in the accommodating cavity, the first cold plate is located between the first module and the second module and penetrates the plurality of beams, wherein the first direction is perpendicular to the second direction.

2. The battery pack according to claim 1, characterized in that: Both ends of the first cold plate in the third direction extend beyond both ends of the battery cell module in the third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other.

3. The battery pack according to claim 1 or 2, characterized in that: The first module and the second module are bonded to the first cold plate.

4. The battery pack according to claim 1 or 2, characterized in that: The battery pack includes a connector, and the accommodating cavity includes: A first cavity, wherein the battery cell module is disposed in the first cavity; The second cavity is located at one side of the first cavity in the first direction, and the first cavity and the second cavity are separated by the crossbeam, and the connecting member is arranged in the second cavity.

5. The battery pack according to claim 1, characterized in that: The housing assembly comprises: a first shell, a plurality of the beams being arranged at intervals on the first shell along the first direction; The second shell is covered on the first shell and defines the accommodating cavity with the first shell.

6. The battery pack according to claim 5, characterized in that: The plurality of beams each include: A first sub-beam and a second sub-beam, the first sub-beam and the second sub-beam are respectively located on both sides of the first cold plate in the thickness direction, and the first sub-beam and the second sub-beam are connected to each other, the first sub-beam and the first module are opposite to each other in the first direction, the second sub-beam and the second module are opposite to each other in the first direction, and an end of the second sub-beam away from the first sub-beam is connected to the first shell.

7. The battery pack according to claim 6, characterized in that: The second sub-crossbeam and the first shell are connected by a first fastener; And / or, the second sub-crossbeam and the first shell are adhesively connected.

8. The battery pack according to claim 7, characterized in that: When the second sub-beam and the first shell are connected by the first fastener, a first avoidance hole for avoiding the first fastener is provided on the bottom wall of the first shell, and a groove surrounding the first avoidance hole is provided on the side of the first shell away from the battery cell module, a second seal is provided in the groove, and the first fastener abuts against the second seal.

9. The battery pack according to claim 6, characterized in that: A cooling channel is provided on the first cold plate, and an avoidance groove for avoiding the cooling channel is provided on at least one of an end of the first sub-beam facing the first cold plate and an end of the second sub-beam facing the first cold plate; And / or, the first sub-crossbeam and the second sub-crossbeam are connected via a second fastener, and the first cold plate is provided with a second avoidance hole for avoiding the second fastener.

10. The battery pack according to claim 5, characterized in that: A third cold plate is disposed between the second shell on one side of the second direction facing the battery cell module and the battery cell module.

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