A battery pack

Abstract

The present invention provides a battery pack, belonging to the field of battery technology. The battery pack includes a box body and a plurality of batteries; the box body includes a first shell, a second shell and a plurality of partitions, the plurality of partitions are arranged between the first shell and the second shell, so as to define a liquid inlet cavity, a receiving cavity and a liquid outlet cavity which are sequentially connected along a second direction inside the box body; a plurality of batteries are arranged in the receiving cavity, a battery is accommodated in a diversion cavity, the outer wall of the battery and the inner wall of the diversion cavity define a diversion channel, the liquid inlet end of the diversion channel is connected to the liquid inlet cavity, and the liquid outlet end of the diversion channel is connected to the liquid outlet cavity; along the second direction, one side of the box body is provided with a liquid inlet connected to the liquid inlet cavity, and the other side of the box body is provided with a liquid outlet connected to the liquid outlet cavity. The battery pack provided by the present invention can cool the surface of the battery to improve the efficiency, uniformity and cooling quality of the battery cooling.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a battery pack. Background Art

[0002] Currently, air cooling and liquid cooling are commonly used for thermal management of lithium battery packs. The cooling medium for air cooling is air, which has a small heat capacity and thermal conductivity, and cannot be used for cooling battery packs under high-rate charge and discharge.

[0003] Liquid cooling methods are usually cold plate cooling and immersion cooling. Cold plate cooling often uses a liquid cold plate at the bottom to cool the battery pack, and thermal conductive glue is used between the liquid cold plate and the bottom of the battery cell. This method is indirect heat exchange, and there are problems such as large thermal resistance and low heat exchange efficiency. Especially for power battery packs, which have high charge and discharge rates, when using traditional bottom water cooling, there is a large temperature difference between the top and bottom of the battery cell.

[0004] At present, the immersion liquid-cooled battery pack usually includes a box, a cover, a battery pack in the inner cavity of the box, and a coolant. The box is generally made of aluminum alloy. The cover and the box are sealed with a sealing ring or sealant. Multiple bolts are used around the cover to fasten and seal the cover and the box. The battery pack with this structure is heavy and has low specific energy. The coolant flows unevenly inside the battery pack, resulting in a large temperature difference between the batteries. At the same time, the gasket or sealant is prone to aging, and there is a risk of battery pack leakage. Summary of the invention

[0005] In view of this, an object of the present invention is to overcome the deficiencies in the prior art and provide a battery pack.

[0006] The present invention provides the following technical solution: a battery pack having a first direction, a second direction and a third direction perpendicular to each other, comprising:

[0007] A box body, comprising a first shell, a second shell and a plurality of partitions, wherein the plurality of partitions are arranged between the first shell and the second shell to define a liquid inlet cavity, a receiving cavity and a liquid outlet cavity which are sequentially connected along the second direction inside the box body;

[0008] The partition is adjacent to one side of the first shell and defines a flow guide cavity with the first shell, the partition is adjacent to one side of the second shell and defines a flow guide cavity with the second shell, a flow guide cavity is defined between two adjacent partitions, and a plurality of the flow guide cavities are arranged along the first direction;

[0009] A plurality of batteries are arranged in the accommodating cavity, one of the batteries is accommodated in one of the diversion cavities, the outer wall of the battery and the inner wall of the diversion cavity define a diversion channel, the liquid inlet end of the diversion channel is communicated with the liquid inlet cavity, and the liquid outlet end of the diversion channel is communicated with the liquid outlet cavity;

[0010] Along the second direction, a liquid inlet communicating with the liquid inlet cavity is provided on one side of the box body, and a liquid outlet communicating with the liquid outlet cavity is provided on the other side of the box body.

[0011] Further, the box body includes a first outer shell, a second outer shell and a plurality of partitions;

[0012] A plurality of said partitions are arranged between said first shell and said second shell;

[0013] The partition is adjacent to one side of the first shell and defines a guide cavity with the first shell. The partition is adjacent to one side of the second shell and defines a guide cavity with the second shell. A guide cavity is defined between two adjacent partitions.

[0014] Further, the partition includes a connecting frame and a connecting plate arranged in the connecting frame;

[0015] Along the third direction, the connection frame includes a first frame plate and a second frame plate that are arranged opposite to each other, one end of the connection plate is connected to the first frame plate, and the other end of the connection plate is connected to the second frame plate;

[0016] Along the second direction, the connection frame includes a third frame plate and a fourth frame plate, one end of the connection plate is spaced apart from the third frame plate to form a first guide port, and the other end of the connection plate is spaced apart from the fourth frame plate to form a second guide port;

[0017] The first frame plate, the third frame plate, the second frame plate and the fourth frame plate are sequentially connected end to end to form the connection frame;

[0018] A plurality of the first flow guide ports are connected to form the liquid inlet cavity, and a plurality of the second flow guide ports are connected to form the liquid outlet cavity.

[0019] Further, a first limiting plate is provided on one side of the connecting plate close to the third frame plate, one end of the first limiting plate is connected to the second frame plate, and a gap is provided between the other end of the first limiting plate and the first frame plate to form a liquid inlet gap between the first limiting plate and the first frame plate;

[0020] A second limiting plate is provided on one side of the connecting plate close to the fourth frame plate, one end of the second limiting plate is connected to the first frame plate, and a gap is provided between the other end of the second limiting plate and the second frame plate to form a liquid outlet gap between the second limiting plate and the second frame plate.

[0021] Further, a first boss is provided on a side of the first frame plate facing the second frame plate, and the first boss is adjacent to a side of the second limiting plate facing the first limiting plate;

[0022] A second boss is disposed on a side of the second frame plate facing the first frame plate, and the second boss is adjacent to a side of the first limiting plate facing the second limiting plate.

[0023] Further, along the first direction, two opposite sides of the connecting plate are respectively provided with first flow guiding structures;

[0024] The first guide structure includes a first protrusion, a second protrusion, a plurality of first guide strips, and a plurality of second guide strips;

[0025] Along the second direction, the first protrusion is adjacent to the side of the first limiting plate facing the second limiting plate, one end of the plurality of first guide strips is connected to the first protrusion, and the other end of the plurality of first guide strips is spaced from the second protrusion, the second protrusion is adjacent to the side of the second limiting plate facing the first limiting plate, one end of the plurality of second guide strips is connected to the second protrusion, and the other end of the plurality of second guide strips is spaced from the first protrusion;

[0026] Along the third direction, a plurality of the first guide bars and a plurality of the second guide bars are alternately arranged.

[0027] Further, along the first direction, a first installation groove is defined on one side of the first housing facing the second housing;

[0028] A first baffle, a second baffle and a second flow-guiding structure are provided at the bottom of the first mounting groove, the first baffle is adjacent to the liquid inlet cavity, the second baffle is adjacent to the liquid outlet cavity, and the second flow-guiding structure is provided between the first baffle and the second baffle;

[0029] The second guide structure includes a third protrusion, a fourth protrusion, a plurality of third guide strips and a plurality of fourth guide strips;

[0030] Along the second direction, the third protrusion is adjacent to the side of the first baffle plate facing the second baffle plate, one end of the plurality of third guide strips is connected to the third protrusion, and the other end of the plurality of third guide strips is spaced from the second baffle plate, the fourth protrusion is adjacent to the side of the second baffle plate facing the first baffle plate, one end of the plurality of fourth guide strips is connected to the fourth protrusion, and the other end of the plurality of fourth guide strips is spaced from the first baffle plate;

[0031] Along the third direction, the plurality of third guide bars and the plurality of fourth guide bars are alternately arranged.

[0032] Further, a first power connector is provided on a side of the first housing facing away from the second housing, and the first power connector is provided on a side of the first baffle facing away from the second baffle;

[0033] A first reserved hole is provided at the bottom of the first installation groove, and the first power connector is communicated with the liquid inlet cavity through the first reserved hole.

[0034] Further, along the first direction, a second installation groove is defined on a side of the second housing facing the first housing;

[0035] Along the second direction, a third baffle, a fourth baffle and a third flow-guiding structure are provided at the bottom of the second mounting groove, the third baffle is adjacent to the liquid inlet cavity, the fourth baffle is adjacent to the liquid outlet cavity, and the third flow-guiding structure is arranged between the third baffle and the fourth baffle;

[0036] The third guide structure includes a fifth protrusion, a sixth protrusion, a plurality of fifth guide strips and a plurality of sixth guide strips;

[0037] Along the second direction, the fifth protrusion is adjacent to a side of the third baffle plate facing the fourth baffle plate, one end of a plurality of the fifth guide strips is connected to the fifth protrusion, and the other end of the plurality of the fifth guide strips is spaced from the fourth baffle plate, the sixth protrusion is adjacent to a side of the fourth baffle plate facing the third baffle plate, one end of a plurality of the sixth guide strips is connected to the sixth protrusion, and the other end of the plurality of the sixth guide strips is spaced from the third baffle plate;

[0038] Along the third direction, the plurality of fifth guide bars and the plurality of sixth guide bars are alternately arranged.

[0039] Furthermore, a second power connector is provided on a side of the second housing facing away from the first housing;

[0040] A second reserved hole is provided at the bottom of the second installation groove, and the second power connector is communicated with the liquid inlet cavity through the second reserved hole.

[0041] Furthermore, a first elastic sealing pad is provided between the first housing and the battery, and along the first direction, the first elastic sealing pad overlaps with the first flow-guiding structure;

[0042] A second elastic sealing pad is provided between the partition and the battery, and along the first direction, the second elastic sealing pad overlaps with the second flow-guiding structure;

[0043] A third elastic sealing pad is provided between the second housing and the battery, and along the first direction, the third elastic sealing pad overlaps with the third flow guiding structure.

[0044] The embodiments of the present invention have the following advantages: the battery pack provided by the present invention can allow the cooling liquid entering the liquid inlet cavity to enter the liquid inlet cavity from the bottom of the liquid inlet cavity, and as the cooling liquid is continuously injected, the liquid level in the liquid inlet cavity gradually rises along the third direction to ensure that the cooling liquid can fill the liquid inlet cavity. When the liquid level in the liquid inlet cavity rises to the liquid inlet end of the guide channel, the cooling liquid in the liquid inlet cavity enters the guide channel through the liquid inlet end. Since the liquid inlet end is close to the upper end of the liquid inlet cavity, the cooling liquid entering the guide channel flows from top to bottom along the third direction through the surface of the battery, and cools the surface of the battery to improve the efficiency, uniformity and cooling quality of the battery.

[0045] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0047] Figure 1 A schematic structural diagram of a battery pack provided by some embodiments of the present invention from one perspective is shown;

[0048] Figure 2 An exploded view of a battery pack provided by some embodiments of the present invention is shown;

[0049] Figure 3 A schematic structural diagram showing a first housing in a battery pack provided by some embodiments of the present invention from one perspective is shown;

[0050] Figure 4 A schematic structural diagram showing a perspective of a separator in a battery pack provided by some embodiments of the present invention;

[0051] Figure 5 A schematic structural diagram showing a second housing in a battery pack from one perspective provided by some embodiments of the present invention is shown;

[0052] Figure 6 A schematic diagram showing a perspective of the flow direction of cooling liquid inside a box of a battery pack provided by some embodiments of the present invention;

[0053] Figure 7A schematic diagram showing a perspective of the flow direction of a coolant in a flow guide cavity of a battery pack provided by some embodiments of the present invention;

[0054] Figure 8 A schematic structural diagram showing another perspective of a battery pack provided by some embodiments of the present invention;

[0055] Fig. 9 A schematic structural diagram showing another perspective of a battery pack provided by some embodiments of the present invention;

[0056] Fig.10 A schematic structural diagram showing other viewing angles of a battery pack provided by some embodiments of the present invention;

[0057] Fig.11 Shows Fig.10 Cross-sectional view of the middle AA section;

[0058] Fig.12 A structural schematic diagram of a first elastic sealing gasket in a battery pack provided by some embodiments of the present invention is shown from one perspective.

[0059] Description of main component symbols:

[0060] 10-box; 100-liquid inlet chamber; 200-accommodation chamber; 300-liquid outlet chamber; 210-flow guide chamber; 110-liquid inlet; 310-liquid outlet; 20-battery; 400-flow guide channel; 500-first shell; 600-second shell; 700-partition plate; 710-connection frame; 720-connection plate; 711-first frame plate; 712-second frame plate; 713-third frame plate; 714-fourth frame plate; 730-first flow guide port; 740-second flow guide port; 721 - first limiting plate; 722 - liquid inlet notch; 723 - second limiting plate; 724 - liquid outlet notch; 715 - first boss; 716 - second boss; 750 - first guide structure; 751 - first protrusion; 752 - second protrusion; 753 - first guide strip; 754 - second guide strip; 510 - first mounting groove; 520 - first baffle; 530 - second baffle; 540 - second guide structure; 541 - third protrusion; 542 - fourth protrusion; 543 - third guide strip; 5 44-fourth guide bar; 550-first power connector; 560-first reserved hole; 610-second mounting slot; 620-third baffle; 630-fourth baffle; 640-third guide structure; 641-fifth protrusion; 642-sixth protrusion; 643-fifth guide bar; 644-sixth guide bar; 650-second power connector; 660-second reserved hole; 201-positive pole; 202-negative pole; 800-first connecting copper bar; 900-second connecting copper bar; 1000 -third connecting copper bar; 1100-first elastic sealing pad; 1200-second elastic sealing pad; 1300-third elastic sealing pad; 570-first groove wall; 580-second groove wall; 670-third groove wall; 680-fourth groove wall; 590-first notch; 713a-first convex portion; 713b-second notch; 714a-second convex portion; 714b-third notch; 690-third convex portion; 1400-first pressure plate; 1500-second pressure plate; 1600-fastener.

[0061] X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0062] Embodiments of the present invention are described in detail below, examples of which 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.

[0063] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0064] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0066] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of the template are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0067] like Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, some embodiments of the present invention provide a battery pack, which is mainly used in mobile devices, electric vehicles, home appliances, energy storage devices, etc., to reduce the temperature difference of the battery 20 during the cooling process and improve the uniformity and cooling quality of the battery 20.

[0068] Please refer to Figure 2 As shown, the battery pack has a first direction X, a second direction Y and a third direction Z which are perpendicular to each other.

[0069] The battery pack includes a case 10 and a plurality of batteries 20 .

[0070] The housing 10 includes a first outer shell 500 , a second outer shell 600 and a plurality of partitions 700 .

[0071] It is understandable that the number of the partitions 700 can be any value of two or more than two, and can be specifically set according to actual conditions.

[0072] Among them, the plurality of partitions 700 are arranged between the first shell 500 and the second shell 600. It can be understood that the first shell 500, the plurality of partitions 700 and the second shell 600 are sequentially connected along the first direction to form the box body 10.

[0073] It should be noted that, by arranging a plurality of baffles 700 between the first shell 500 and the second shell 600, the interior of the housing 10 is defined as a liquid inlet chamber 100, a receiving chamber 200 and a liquid outlet chamber 300 which are sequentially connected along the second direction through the first shell 500, the second shell 600 and the plurality of baffles 700. It can be understood that the liquid inlet chamber 100 is connected with the liquid outlet chamber 300 through the receiving chamber 200, that is, the coolant entering the housing 10 first passes through the liquid inlet chamber 100, and enters the receiving chamber 200 through the liquid inlet chamber 100, and then enters the liquid outlet chamber 300 from the receiving chamber 200.

[0074] Specifically, the partition 700 is connected to the first housing 500 at one side adjacent to the first housing 500, and a flow guiding cavity 210 is defined between the first housing 500 and the partition 700, and a battery 20 is disposed in the flow guiding cavity 210. It can be understood that the battery 20 is disposed between the first housing 500 and the partition 700 adjacent to the first housing 500, so that the battery 20 is limited in the first direction by the first housing 500 and the partition 700, so as to improve the stability of the battery 20 in the first direction. In addition, there is a gap between the first housing 500 and the battery 20, and there is a gap between the partition 700 adjacent to the first housing 500 and the battery 20, so that a flow guiding channel 400 is defined by the outer wall of the battery 20, the inner wall of the first housing 500, and the partition 700 adjacent to the first housing 500 toward the side of the first housing 500.

[0075] Secondly, the partition 700 is connected to the second shell 600 at one side adjacent to the second shell 600, and a flow guide cavity 210 is defined between the second shell 600 and the partition 700, and a battery 20 is arranged in the flow guide cavity 210. It can be understood that the battery 20 is arranged between the second shell 600 and the partition 700 adjacent to the second shell 600, so that the battery 20 is limited along the first direction by the second shell 600 and the partition 700, so as to improve the stability of the battery 20 in the first direction. In addition, there is a gap between the second shell 600 and the battery 20, and there is a gap between the partition 700 adjacent to the second shell 600 and the battery 20, so as to define a flow guide channel 400 through the outer wall of the battery 20, the inner wall of the second shell 600, and the partition 700 adjacent to the second shell 600 toward the side of the second shell 600.

[0076] In addition, two adjacent partitions 700 are connected, and a flow guiding cavity 210 is defined between the two adjacent partitions 700, and a battery 20 is arranged in the flow guiding cavity 210. It can be understood that the battery 20 is arranged between the two adjacent partitions 700, so that the battery 20 is limited along the first direction by the two adjacent partitions 700, so as to improve the stability of the battery 20 in the first direction. In addition, there is a gap between the side of the partition 700 facing the battery 20 and the outer wall of the battery 20, so that a flow guiding channel 400 is defined by the two adjacent partitions 700 facing the side of the battery 20 and the outer wall of the battery 20.

[0077] It should be noted that a plurality of guide chambers 210 are arranged in sequence along the first direction, and the inlet of the guide chamber 210 is adjacent to the liquid inlet chamber 100, and the inlet of the guide chamber 210 is communicated with the liquid inlet chamber 100, so that the coolant entering the liquid inlet chamber 100 can enter the guide chamber 210 through the inlet. Secondly, the outlet of the guide chamber 210 is adjacent to the liquid outlet chamber 300, and the outlet of the guide chamber 210 is communicated with the liquid outlet chamber 300, so that the coolant entering the guide chamber 210 can enter the liquid outlet chamber 300 through the outlet. It can be understood that the accommodating chamber 200 includes a plurality of guide chambers 210 arranged in sequence along the first direction.

[0078] In this embodiment, the number of the guide cavities 210 can be specifically set according to actual conditions.

[0079] Along the second direction, one side of the housing 10 is provided with a liquid inlet 110 communicating with the liquid inlet cavity 100, so that external coolant can enter the liquid inlet cavity 100 through the liquid inlet 110. It can be understood that, along the second direction, the liquid inlet 110 is located on the side of the liquid inlet cavity 100 away from the liquid outlet cavity 300.

[0080] In addition, along the second direction, a liquid outlet 310 communicating with the liquid outlet cavity 300 is provided on a side of the box body 10 away from the liquid inlet 110 , so that the liquid entering the liquid outlet cavity 300 can be discharged through the liquid outlet 310 .

[0081] A plurality of batteries 20 are disposed in the accommodating cavity 200 , so that the batteries 20 are cooled by the cooling liquid entering into the accommodating cavity 200 .

[0082] Specifically, one of the batteries 20 is accommodated in one of the diversion chambers 210, and there is a gap between the outer wall of the battery 20 and the inner wall of the diversion chamber 210, so as to define a diversion channel 400 between the outer wall of the battery 20 and the inner wall of the diversion chamber 210, and the liquid inlet end of the diversion channel 400 is connected to the liquid inlet chamber 100, and the liquid outlet end of the diversion channel 400 is connected to the liquid outlet chamber 300.

[0083] It is understandable that the external cooling liquid enters the liquid inlet cavity 100 through the liquid inlet port 110, and the liquid entering the liquid inlet cavity 100 enters the diversion channel 400 through the liquid inlet end of the diversion channel 400. The cooling liquid entering the diversion channel 400 contacts the surface of the battery 20, and can form heat conduction with the heat generated by the battery 20, and take away part of the heat generated by the battery 20 with the cooling liquid, thereby avoiding the temperature increase of the battery 20 to ensure the temperature stability of the battery 20. The cooling liquid flowing through the diversion channel 400 enters the liquid outlet cavity 300 through the liquid outlet end of the diversion channel 400, and the liquid entering the liquid outlet cavity 300 is discharged through the liquid outlet port 310 to form a cooling and lowering of the battery 20 accommodated in the accommodating cavity 200.

[0084] It should be noted that, along the second direction, the liquid inlet 110 is arranged at the lower end of one side of the box body 10, and the storage liquid outlet 310 is arranged at the upper end of the other side of the box body 10, and the liquid inlet 110 and the liquid outlet 310 are respectively arranged along the diagonal corners of the box body 10; along the third direction, the liquid inlet end of the guide channel 400 is close to the upper end of the liquid inlet cavity 100, and the liquid outlet end of the guide channel 400 is close to the lower end of the liquid outlet cavity 300.

[0085] Specifically, the coolant that enters the liquid inlet cavity 100 through the liquid inlet port 110 enters the liquid inlet cavity 100 from the bottom of the liquid inlet cavity 100, and as the coolant is continuously injected, the liquid level in the liquid inlet cavity 100 gradually rises along the third direction to ensure that the coolant can fill the liquid inlet cavity 100. When the liquid level in the liquid inlet cavity 100 rises to the liquid inlet end of the guide channel 400, the coolant in the liquid inlet cavity 100 enters the guide channel 400 through the liquid inlet end. Since the liquid inlet end is close to the upper end of the liquid inlet cavity 100, the coolant that enters the guide channel 400 flows from top to bottom along the third direction through the surface of the battery 20, and cools the surface of the battery 20 to improve the uniformity and cooling quality of the battery 20. Secondly, the coolant flowing through the battery 20 enters the liquid outlet cavity 300 through the liquid outlet end of the guide channel 400, and the liquid level of the coolant in the liquid outlet cavity 300 gradually increases along the third direction to ensure that the coolant can fill the liquid outlet cavity 300, so that the coolant entering the interior of the box body 10 can completely fill the liquid inlet cavity 100, the accommodating cavity 200 and the liquid outlet cavity 300, thereby ensuring the stability of the coolant during the flow process in the liquid inlet cavity 100, the accommodating cavity 200 and the liquid outlet cavity 300, avoiding the occurrence of flow blind spots, thereby further ensuring the uniformity and cooling quality of the battery 20 in the accommodating cavity 200.

[0086] It can be understood that in the battery pack provided by the present application, the coolant entering the guide channel 400 through the liquid inlet 110 can directly contact the surface of the battery 20, thereby further improving the cooling uniformity and cooling efficiency of the battery 20.

[0087] like Figure 2 and Figure 4 As shown, in some embodiments of the present invention, the partition 700 includes a connection frame 710 and a connection plate 720 disposed in the connection frame 710 .

[0088] The shape of the connection frame 710 may be any one of polygonal, circular, elliptical, and irregular shapes, or a combination of two or more.

[0089] In this embodiment, the connection frame 710 is taken as a square frame as an example for detailed description as follows.

[0090] Along the third direction, the connection frame 710 includes a first frame plate 711 and a second frame plate 712 that are arranged opposite to each other, the first frame plate 711 is parallel to the second frame plate 712, one end of the connection plate 720 is connected to the side of the first frame plate 711 facing the second frame plate 712, and the other end of the connection plate 720 is connected to the end of the second frame plate 712 facing the first frame plate 711. The connection plate 720 is perpendicular to the first frame plate 711 and the second frame plate 712, so that the space inside the connection frame 710 is divided into two accommodating spaces by the connection plate 720, so that part of the battery 20 can be accommodated through the accommodating space, so as to improve the utilization rate of the partition 700, improve the space utilization rate inside the battery pack, and thus improve the energy density inside the battery pack.

[0091] Along the second direction, the connection frame 710 includes a third frame plate 713 and a fourth frame plate 714, the third frame plate 713 is parallel to the fourth frame plate 714, one end of the connection plate 720 close to the third frame plate 713 is spaced from the third frame plate 713 to form a first guide port 730, and one end of the connection plate 720 close to the fourth frame plate 714 is spaced from the fourth frame plate 714 to form a second guide port 740. In addition, the connection plate 720 is perpendicular to the third frame plate 713 and the fourth frame plate 714.

[0092] Specifically, a plurality of the first flow guide ports 730 are connected to form the liquid inlet cavity 100 , and a plurality of the second flow guide ports 740 are connected to form the liquid outlet cavity 300 .

[0093] In this embodiment, the first frame plate 711 , the third frame plate 713 , the second frame plate 712 , and the fourth frame plate 714 are sequentially connected end to end to form the connection frame 710 .

[0094] like Figure 1 and Figure 4 As shown, in some embodiments of the present invention, a first limiting plate 721 is provided on one side of the connecting plate 720 close to the third frame plate 713 , the first limiting plate 721 is perpendicular to the connecting plate 720 , and the length direction of the first limiting plate 721 is parallel to the third direction.

[0095] Among them, one end of the first limiting plate 721 close to the second frame plate 712 is connected to the second frame plate 712, and there is a gap between the end of the first limiting plate 721 close to the first frame plate 711 and the first frame plate 711, so as to form a liquid inlet gap 722 between the first limiting plate 721 and the first frame plate 711, so that the coolant flowing through the first guide port 730 can enter the side of the first limiting plate 721 away from the third frame plate 713 through the liquid inlet gap 722, that is, the liquid inlet cavity 100 is connected with the guide cavity 210 through the liquid inlet gap 722.

[0096] In addition, a second limiting plate 723 is provided on the side of the connecting plate 720 close to the fourth frame plate 714, and the second limiting plate 723 is perpendicular to the connecting plate 720. An end of the second limiting plate 723 close to the first frame plate 711 is connected to the first frame plate 711, and an end of the second limiting plate 723 close to the second frame plate 712 is spaced from the second frame plate 712 to form a liquid outlet gap 724 between the second limiting plate 723 and the second frame plate 712, so that the cooling liquid flowing between the first limiting plate 721 and the second limiting plate 723 can enter the side of the second limiting plate 723 facing the fourth frame plate 714 through the liquid outlet gap 724, that is, the liquid outlet cavity 300 is connected with the guide cavity 210 through the liquid outlet gap 724.

[0097] It can be understood that the first limiting plate 721 is parallel to the second limiting plate 723 .

[0098] It should be noted that along the first direction, a first limiting plate 721 is provided on two opposite sides of the connecting plate 720, and a second limiting plate 723 is provided on two opposite sides of the connecting plate 720, so as to limit the battery 20 in the second direction by the first limiting plate 721 and the second limiting plate 723 arranged on the same side of the connecting plate 720, so as to improve the stability of the battery 20 in the second direction.

[0099] like Figure 4 and Fig.11 As shown, in some embodiments of the present invention, a first boss 715 is provided on the side of the first frame plate 711 facing the second frame plate 712, and the first boss 715 is adjacent to the side of the second limiting plate 723 facing the first limiting plate 721, so as to provide support and limiting effect on the side of the battery 20 facing the first frame plate 711 through the first boss 715, so that a gap is formed between the side of the battery 20 facing the first frame plate 711 and the first frame plate 711, so that the coolant flowing through the guide channel 400 can contact the side of the battery 20 facing the first frame plate 711 through the gap between the battery 20 and the first frame plate 711, thereby cooling the side of the battery 20 facing the first frame plate 711 through the coolant.

[0100] It should be noted that, along the first direction, first bosses 715 are respectively provided on two opposite sides of the connecting plate 720 , so as to provide support and limit functions for the batteries 20 disposed on two opposite sides of the connecting plate 720 through the first bosses 715 .

[0101] In addition, a second boss 716 is provided on the side of the second frame plate 712 facing the first frame plate 711, and the second boss 716 is adjacent to the side of the first limiting plate 721 facing the second limiting plate 723, so as to provide support and limiting effect on the side of the battery 20 facing the second frame plate 712 through the second boss 716, so that a gap is formed between the side of the battery 20 facing the second frame plate 712 and the second frame plate 712, so that the coolant flowing through the guide channel 400 can contact the side of the battery 20 facing the second frame plate 712 through the gap between the battery 20 and the second frame plate 712, thereby cooling the side of the battery 20 facing the second frame plate 712 by the coolant.

[0102] It should be noted that, along the first direction, the second bosses 716 are respectively provided on two opposite sides of the connecting plate 720 , so as to provide support and limit functions for the batteries 20 disposed on the two opposite sides of the connecting plate 720 through the second bosses 716 .

[0103] like Figure 4 As shown, in some embodiments of the present invention, along the first direction, two opposite sides of the connecting plate 720 are respectively provided with first guide structures 750 .

[0104] The first guide structure 750 includes a first protrusion 751, a second protrusion 752, a plurality of first guide strips 753 and a plurality of second guide strips 754. The number of the first guide strips 753 and the second guide strips 754 can be set according to actual conditions and is not specifically limited in this embodiment.

[0105] Along the second direction, the first protrusion 751 is adjacent to the side of the first limiting plate 721 facing the second limiting plate 723. Specifically, the length direction of the first protrusion 751 is parallel to the third direction, and along the third direction, one end of the first protrusion 751 close to the second frame plate 712 is connected to the second frame plate 712, and there is a gap between one end of the first protrusion 751 close to the first frame plate 711 and the first frame plate 711.

[0106] Along the second direction, one end of the plurality of first guide bars 753 close to the first protrusion 751 is connected to the first protrusion 751, one end of the plurality of first guide bars 753 close to the second protrusion 752 is spaced from the second protrusion 752, and each first guide bar 753 is parallel to the second direction.

[0107] In addition, the second protrusion 752 is adjacent to the side of the second limiting plate 723 facing the first limiting plate 721. Specifically, the length of the second protrusion 752 is parallel to the third direction, and along the third direction, one end of the second protrusion 752 close to the first frame plate 711 is connected to the first frame plate 711, and there is a gap between one end of the second protrusion 752 close to the second frame plate 712 and the second frame plate 712.

[0108] Along the second direction, one end of the plurality of second guide bars 754 close to the second protrusion 752 is connected to the second protrusion 752, one end of the plurality of second guide bars 754 close to the first protrusion 751 is spaced from the first protrusion 751, and each second guide bar 754 is parallel to the second direction.

[0109] Along the third direction, a plurality of the first guide bars 753 and a plurality of the second guide bars 754 are alternately arranged to form a meandering guide channel 400 on the side of the separator 700 and the battery 20 facing the separator 700 .

[0110] It should be noted that the spacing between two adjacent first guide bars 753 and the spacing between two adjacent second guide bars 754 can be specifically set according to actual conditions.

[0111] In this embodiment, the plurality of first guide bars 753 and the plurality of second guide bars 754 are arranged at equal intervals along the third direction to improve the uniformity of cooling the two sides of the battery 20 along the first direction when the coolant flows through the guide channel 400 .

[0112] like Figure 2 and Figure 3 As shown, in some embodiments of the present invention, along the first direction, a first mounting groove 510 is defined on a side of the first housing 500 facing the second housing 600 , so that a portion of the battery 20 can be received in the first mounting groove 510 .

[0113] Among them, the bottom of the first installation groove 510 is provided with a first baffle 520, a second baffle 530 and a second guide structure 540, the first baffle 520 is adjacent to the liquid inlet chamber 100, the second baffle 530 is adjacent to the liquid outlet chamber 300, the first baffle 520 is parallel to the second baffle 530, and the first baffle 520 and the second baffle 530 are respectively perpendicular to the second direction.

[0114] Along the second direction, the side of the first baffle plate 520 toward the second baffle plate 530 abuts against one end of the battery 20, and the side of the second baffle plate 530 toward the first baffle plate 520 abuts against the other side of the battery 20, so that the first baffle plate 520 and the second baffle plate 530 limit the battery 20 in the second direction to improve the stability of the battery 20 in the second direction.

[0115] In addition, the second guide structure 540 is arranged between the first baffle 520 and the second baffle 530, so as to provide a guide effect for the coolant entering between the first shell 500 and the battery 20 through the second guide structure 540, so as to improve the cooling efficiency, cooling quality and cooling uniformity of the coolant on the battery 20.

[0116] Specifically, the second guide structure 540 includes a third protrusion 541, a fourth protrusion 542, a plurality of third guide strips 543 and a plurality of fourth guide strips 544. The number of the third guide strips 543 and the fourth guide strips 544 can be specifically set according to actual conditions.

[0117] Along the second direction, the third protrusion 541 is adjacent to the side of the first baffle 520 facing the second baffle 530. Specifically, the length direction of the third protrusion 541 is parallel to the third direction. Along the third direction, the first mounting groove 510 has a first groove wall 570 and a second groove wall 580 that are oppositely arranged. One end of the third protrusion 541 close to the second groove wall 580 is connected to the second groove wall 580, and there is a gap between one end of the third protrusion 541 close to the first groove wall 570 and the first groove wall 570.

[0118] Along the second direction, one end of the plurality of third guide bars 543 close to the third protrusion 541 is connected to the third protrusion 541 , one end of the plurality of third guide bars 543 close to the fourth protrusion 542 is spaced from the fourth protrusion 542 , and each third guide bar 543 is parallel to the second direction.

[0119] In addition, the fourth protrusion 542 is adjacent to the side of the second baffle 530 facing the first baffle 520. Specifically, the length direction of the fourth protrusion 542 is parallel to the third direction, and along the third direction, one end of the fourth protrusion 542 close to the first groove wall 570 is connected to the first groove wall 570, and one end of the fourth protrusion 542 close to the second groove wall 580 is spaced from the second groove wall 580.

[0120] Along the second direction, one end of the plurality of fourth guide bars 544 close to the fourth protrusion 542 is connected to the fourth protrusion 542 , one end of the plurality of fourth guide bars 544 close to the third protrusion 541 is spaced from the third protrusion 541 , and each fourth guide bar 544 is parallel to the second direction.

[0121] Along the third direction, the plurality of third guide bars 543 and the plurality of fourth guide bars 544 are alternately arranged at intervals to form a meandering guide channel 400 on the first housing 500 and the side of the battery 20 facing the first housing 500 .

[0122] In this embodiment, the plurality of third guide bars 543 and the plurality of fourth guide bars 544 are arranged at equal intervals along the third direction to improve the uniformity of cooling the two sides of the battery 20 along the first direction when the coolant flows through the guide channel 400 .

[0123] like Figure 5 As shown, in some embodiments of the present invention, along the first direction, a second mounting groove 610 is defined on a side of the second housing 600 facing the first housing 500 , so that a portion of the battery 20 can be received in the second mounting groove 610 .

[0124] Among them, the bottom of the second installation groove 610 is provided with a third baffle 620, a fourth baffle 630 and a third guide structure 640, the third baffle 620 is adjacent to the liquid inlet chamber 100, the fourth baffle 630 is adjacent to the liquid outlet chamber 300, the third baffle 620 is parallel to the fourth baffle 630, and the third baffle 620 and the fourth baffle 630 are respectively perpendicular to the second direction.

[0125] Along the second direction, the side of the third baffle 620 toward the fourth baffle 630 abuts against one end of the battery 20, and the side of the fourth baffle 630 toward the third baffle 620 abuts against the other side of the battery 20, so that the battery 20 is limited in the second direction by the third baffle 620 and the fourth baffle 630 to improve the stability of the battery 20 in the second direction.

[0126] In addition, the third guide structure 640 is arranged between the third baffle 620 and the fourth baffle 630, so as to provide a guide effect on the coolant entering between the second shell 600 and the battery 20 through the third guide structure 640, so as to improve the cooling efficiency, cooling quality and cooling uniformity of the coolant on the battery 20.

[0127] Specifically, the third guide structure 640 includes a fifth protrusion 641, a sixth protrusion 642, a plurality of fifth guide bars 643 and a plurality of sixth guide bars 644. The number of the fifth guide bars 643 and the sixth guide bars 644 can be specifically set according to actual conditions.

[0128] Along the second direction, the fifth protrusion 641 is adjacent to the side of the third baffle 620 facing the fourth baffle 630. Specifically, the length direction of the fifth protrusion 641 is parallel to the third direction. Along the third direction, the second mounting groove 610 has a third groove wall 670 and a fourth groove wall 680 that are oppositely arranged. One end of the fifth protrusion 641 close to the fourth groove wall 680 is connected to the fourth groove wall 680, and one end of the fifth protrusion 641 close to the third groove wall 670 is spaced from the third groove wall 670.

[0129] Along the second direction, one end of the plurality of fifth guide bars 643 close to the fifth protrusion 641 is connected to the fifth protrusion 641 , one end of the plurality of fifth guide bars 643 close to the sixth protrusion 642 is spaced from the sixth protrusion 642 , and each fifth guide bar 643 is parallel to the second direction.

[0130] In addition, the sixth protrusion 642 is adjacent to the side of the fourth baffle 630 facing the third baffle 620. Specifically, the length direction of the sixth protrusion 642 is parallel to the third direction, and along the third direction, one end of the sixth protrusion 642 close to the third groove wall 670 is connected to the third groove wall 670, and one end of the sixth protrusion 642 close to the fourth groove wall 680 is spaced from the fourth groove wall 680.

[0131] Along the second direction, one end of the plurality of sixth guide bars 644 close to the sixth protrusion 642 is connected to the sixth protrusion 642 , one end of the plurality of sixth guide bars 644 close to the fifth protrusion 641 is spaced from the fifth protrusion 641 , and each sixth guide bar 644 is parallel to the second direction.

[0132] Along the third direction, the plurality of fifth guide bars 643 and the plurality of sixth guide bars 644 are alternately arranged at intervals to form a meandering guide channel 400 on the second housing 600 and the side of the battery 20 facing the second housing 600 .

[0133] In this embodiment, the plurality of fifth guide bars 643 and the plurality of sixth guide bars 644 are arranged at equal intervals along the third direction to improve the uniformity of cooling the two sides of the battery 20 along the first direction when the coolant flows through the guide channel 400 .

[0134] like Figures 3 to 5 As shown, in some embodiments of the present invention, along the second direction, two opposite sides of the first housing 500 are respectively provided with first notches 590, and the opening of the first notch 590 faces the opening of the first mounting groove 510; the third frame plate 713 is provided with a first convex portion 713a on the side facing the first housing 500, and a second notch 713b is provided on the side facing the second housing 600, and the first convex portion 713a can be adapted to a second notch 713b to form a sealed connection structure. In addition, the fourth frame plate 714 is provided with a second convex portion 714a on the side facing the first housing 500, and a third notch 714b is provided on the side facing the second housing 600.

[0135] Between two adjacent partitions 700 , the second protrusion 714 a can be matched with a second notch 713 b to form a sealed connection structure.

[0136] Between the partition 700 adjacent to the first shell 500 and the first shell 500, the first notch 590 adjacent to the third frame plate 713 is adapted to a first protrusion 713a, and the first notch 590 adjacent to the fourth frame plate 714 is adapted to a second protrusion 714a, so as to form a sealed connection structure between the first shell 500 and the partition 700 adjacent to the first shell 500.

[0137] Along the second direction, two opposite sides of the second housing 600 are respectively provided with third protrusions 690 protruding toward the first housing 500 .

[0138] Between the partition 700 adjacent to the second shell 600 and the second shell 600, the third protrusion 690 adjacent to the third frame plate 713 is adapted to a second notch 713b, and the third protrusion 690 adjacent to the fourth frame plate 714 is adapted to a third notch 714b, so as to form a sealed connection structure between the second shell 600 and the partition 700 adjacent to the second shell 600.

[0139] Among them, the connection method between the first shell 500 and the partition 700 includes any one of bonding, clamping, bolting, and welding; the connection method between two adjacent partitions 700 includes any one of bonding, clamping, bolting, and welding; the connection method between the second shell 600 and the partition 700 includes any one of bonding, clamping, bolting, and welding, which can be specifically set according to actual conditions.

[0140] like Figure 1 and Figure 8 As shown, in some embodiments of the present invention, a first power connector 550 is provided on a side of the first housing 500 facing away from the second housing 600 , and the first power connector 550 is a positive output terminal of the battery pack.

[0141] A first reserved hole 560 is provided at the bottom of the first installation groove 510 , and the first reserved hole 560 is located on the side of the first baffle 520 away from the second baffle 530 , and the side of the first power connector 550 facing the second housing 600 is at least partially exposed to the first reserved hole 560 .

[0142] It should be noted that the first power connector 550 includes a positive copper conductive element and a positive plastic connector. Specifically, the positive copper conductive element is first produced by machining, and then the positive copper conductive element is pre-fixed in a mold and injected with plastic, and then cooled and solidified to form the first power connector 550.

[0143] like Fig. 9 river Fig.10As shown, in some embodiments of the present invention, a second power connector 650 is provided on a side of the second housing 600 facing away from the first housing 500 , and the second power connector 650 is a negative output terminal of the battery pack.

[0144] A second reserved hole 660 is provided at the bottom of the second mounting groove 610 , and the second reserved hole 660 is located on the side of the second baffle 530 away from the first baffle 520 , and the side of the second power connector 650 facing the first housing 500 is at least partially exposed to the second reserved hole 660 .

[0145] It should be noted that the second power connector 650 includes a negative copper conductive element and a negative plastic connector. Specifically, the negative copper conductive element is first produced by machining, and then the negative copper conductive element is pre-fixed in a mold and injected with plastic, and then cooled and solidified to form the second power connector 650.

[0146] like Figure 2 As shown, in some embodiments of the present invention, the battery 20 has a positive electrode 201 and a negative electrode 202 .

[0147] Among them, the positive electrode 201 adjacent to the first shell 500 is connected to the first power connector 550 by welding through the first connecting copper bus 800. Specifically, one end of the first connecting copper bus 800 is connected to the positive electrode 201 adjacent to the first shell 500 by welding, and the other end of the first connecting copper bus 800 passes through the first reserved hole 560 and is connected to the first power connector 550 by welding.

[0148] In addition, the negative electrode 202 adjacent to the second housing 600 is connected to the second power connector 650 by welding through the second connecting copper bar 900. Specifically, one end of the second connecting copper bar 900 is connected to the negative electrode 202 adjacent to the second housing 600 by welding, and the other end of the second connecting copper bar 900 passes through the second reserved hole 660 and is connected to the second power connector 650 by welding.

[0149] Further, two adjacent batteries 20 are connected in series through the third connecting copper bar 1000, so as to connect multiple batteries 20 in the box 10 in series. Specifically, between two adjacent batteries 20, one end of the third connecting copper bar 1000 is connected to the positive electrode 201 of one battery 20 by welding, and the other end of the third connecting copper bar 1000 is connected to the negative electrode 202 of the other battery 20 by welding, so as to connect the two adjacent batteries 20 in series.

[0150] like Figure 3 and Figure 5As shown, in some embodiments of the present invention, along the second direction, the liquid inlet 110 is disposed on one side of the first housing 500 , and the liquid outlet 310 is disposed on one side of the second housing 600 .

[0151] Specifically, the liquid inlet 110 is close to the second groove wall 580, that is, along the third direction, the liquid inlet 110 is located at the bottom end of the first shell 500, so that the coolant can enter the liquid inlet cavity 100 from the bottom end of the box body 10, thereby discharging the gas in the box body 10, to ensure that the coolant entering the liquid inlet cavity 100 can fill the liquid inlet cavity 100, improve the heat exchange effect of the battery pack, and thus ensure the cooling quality of the battery 20 facing the liquid inlet cavity 100. The liquid outlet 310 is close to the third groove wall 670, that is, along the third direction, the liquid outlet 310 is located at the top end of the second shell 600, so that the coolant can be discharged from the liquid outlet 310 through the top end of the liquid outlet cavity 300, to ensure that the coolant entering the liquid outlet cavity 300 can fill the liquid outlet cavity 300, thereby ensuring the cooling quality of the battery 20 facing the liquid outlet cavity 300.

[0152] like Figure 2 and Fig.12 As shown, in some embodiments of the present invention, a first elastic sealing pad 1100 is provided between the first housing 500 and the battery 20 , and along the first direction, the first elastic sealing pad 1100 overlaps with the first flow guiding structure 750 .

[0153] A second elastic sealing pad 1200 is disposed between the partition 700 and the battery 20 , and along the first direction, the second elastic sealing pad 1200 overlaps with the second flow guiding structure 540 .

[0154] In addition, a third elastic sealing pad 1300 is disposed between the second housing 600 and the battery 20 . Along the first direction, the third elastic sealing pad 1300 overlaps with the third flow guiding structure 640 .

[0155] It should be noted that since the battery 20 will expand in the first direction after long-term use, the first elastic sealing pad 1100, the second elastic sealing pad 1200 and the third elastic sealing pad 1300 are arranged so that during the expansion of the battery 20, the first elastic sealing pad 1100, the second elastic sealing pad 1200 and the third elastic sealing pad 1300 can provide a buffering effect on the expansion of the battery 20 and absorb the expansion generated by the battery 20, thereby improving the safety of the battery pack.

[0156] In this embodiment, the first elastic sealing pad 1100 , the second elastic sealing pad 1200 and the third elastic sealing pad 1300 are elastic sealing pads with high temperature resistance and low thermal conductivity, thereby effectively preventing the spread of thermal runaway of the battery 20 and improving the safety of the battery pack.

[0157] like Figure 2 and Fig.11 As shown, in some embodiments of the present invention, a first pressure plate 1400 is provided on the side of the first shell 500 facing away from the second shell 600, and a second pressure plate 1500 is provided on the side of the second shell 600 facing away from the first shell 500, so as to improve the stability of the connection between the first shell 500, the partition 700 and the second shell 600.

[0158] Furthermore, at least one fastener 1600 is disposed on the outer periphery of the box body 10 in a direction perpendicular to the third direction. The fastener 1600 surrounds and abuts against the box body 10 to further improve the stability of the box body 10 .

[0159] It is understandable that the number of fasteners 1600 can be one, two, or any number above two, which can be specifically set according to actual conditions.

[0160] The fastener 1600 may be any one of a cable tie, a fastening rope, and a connecting ring. Specifically, in this embodiment, the fastener 1600 is a cable tie, and there are multiple fasteners 1600 to improve the fastening quality of the box body 10.

[0161] It should be noted that the coolant described in the present invention is an insulating coolant.

[0162] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limiting, and thus other examples of the exemplary embodiments may have different values.

[0163] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0164] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A battery pack having a first direction, a second direction and a third direction perpendicular to each other, characterized in that: include: A box body, comprising a first shell, a second shell and a plurality of partitions, wherein the plurality of partitions are arranged between the first shell and the second shell to define a liquid inlet cavity, a receiving cavity and a liquid outlet cavity which are sequentially connected along the second direction inside the box body; The partition includes a connection frame and a connection plate arranged in the connection frame; Along the third direction, the connection frame includes a first frame plate and a second frame plate that are arranged opposite to each other, one end of the connection plate is connected to the first frame plate, and the other end of the connection plate is connected to the second frame plate; Along the second direction, the connection frame includes a third frame plate and a fourth frame plate, one end of the connection plate is spaced apart from the third frame plate to form a first guide port, and the other end of the connection plate is spaced apart from the fourth frame plate to form a second guide port; The first frame plate, the third frame plate, the second frame plate and the fourth frame plate are sequentially connected end to end to form the connection frame; A plurality of the first flow guide ports are connected to form the liquid inlet cavity, and a plurality of the second flow guide ports are connected to form the liquid outlet cavity; Along the first direction, a first installation groove is defined on one side of the first housing facing the second housing; A first baffle, a second baffle and a second flow-guiding structure are provided at the bottom of the first mounting groove, the first baffle is adjacent to the liquid inlet cavity, the second baffle is adjacent to the liquid outlet cavity, and the second flow-guiding structure is provided between the first baffle and the second baffle; Along the first direction, a second installation groove is defined on a side of the second housing facing the first housing; Along the second direction, a third baffle, a fourth baffle and a third flow-guiding structure are provided at the bottom of the second mounting groove, the third baffle is adjacent to the liquid inlet cavity, the fourth baffle is adjacent to the liquid outlet cavity, and the third flow-guiding structure is arranged between the third baffle and the fourth baffle; The partition is adjacent to one side of the first shell and defines a flow guide cavity with the first shell, the partition is adjacent to one side of the second shell and defines a flow guide cavity with the second shell, a flow guide cavity is defined between two adjacent partitions, and a plurality of the flow guide cavities are arranged along the first direction to form the accommodating cavity; A plurality of batteries are arranged in the accommodating cavity, one of the batteries is accommodated in one of the diversion cavities, the outer wall of the battery and the inner wall of the diversion cavity define a diversion channel, the liquid inlet end of the diversion channel is communicated with the liquid inlet cavity, and the liquid outlet end of the diversion channel is communicated with the liquid outlet cavity; Along the second direction, one side of the box body is provided with a liquid inlet connected to the liquid inlet cavity, and the other side of the box body is provided with a liquid outlet connected to the liquid outlet cavity, the liquid inlet is arranged at the lower end of one side of the box body, and the liquid outlet is arranged at the upper end of the other side of the box body, and the liquid inlet and the liquid outlet are respectively arranged along the diagonally opposite corners of the box body.

2. The battery pack according to claim 1, characterized in that: A first limiting plate is provided on one side of the connecting plate close to the third frame plate, one end of the first limiting plate is connected to the second frame plate, and a gap is provided between the other end of the first limiting plate and the first frame plate to form a liquid inlet gap between the first limiting plate and the first frame plate; A second limiting plate is provided on one side of the connecting plate close to the fourth frame plate, one end of the second limiting plate is connected to the first frame plate, and a gap is provided between the other end of the second limiting plate and the second frame plate to form a liquid outlet gap between the second limiting plate and the second frame plate.

3. The battery pack according to claim 2, characterized in that: A first boss is provided on a side of the first frame plate facing the second frame plate, and the first boss is adjacent to a side of the second limiting plate facing the first limiting plate; A second boss is disposed on a side of the second frame plate facing the first frame plate, and the second boss is adjacent to a side of the first limiting plate facing the second limiting plate.

4. The battery pack according to claim 2, characterized in that: Along the first direction, two opposite sides of the connecting plate are respectively provided with first flow guiding structures; The first guide structure includes a first protrusion, a second protrusion, a plurality of first guide strips, and a plurality of second guide strips; Along the second direction, the first protrusion is adjacent to the side of the first limiting plate facing the second limiting plate, one end of the plurality of first guide strips is connected to the first protrusion, and the other end of the plurality of first guide strips is spaced from the second protrusion, the second protrusion is adjacent to the side of the second limiting plate facing the first limiting plate, one end of the plurality of second guide strips is connected to the second protrusion, and the other end of the plurality of second guide strips is spaced from the first protrusion; Along the third direction, a plurality of the first guide bars and a plurality of the second guide bars are alternately arranged.

5. The battery pack according to claim 4, characterized in that: The second guide structure includes a third protrusion, a fourth protrusion, a plurality of third guide strips and a plurality of fourth guide strips; Along the second direction, the third protrusion is adjacent to the side of the first baffle plate facing the second baffle plate, one end of the plurality of third guide strips is connected to the third protrusion, and the other end of the plurality of third guide strips is spaced from the second baffle plate, the fourth protrusion is adjacent to the side of the second baffle plate facing the first baffle plate, one end of the plurality of fourth guide strips is connected to the fourth protrusion, and the other end of the plurality of fourth guide strips is spaced from the first baffle plate; Along the third direction, the plurality of third guide bars and the plurality of fourth guide bars are alternately arranged.

6. The battery pack according to claim 5, characterized in that: A first power connector is provided on a side of the first housing facing away from the second housing, and the first power connector is provided on a side of the first baffle facing away from the second baffle; A first reserved hole is provided at the bottom of the first installation groove, and the first power connector is communicated with the liquid inlet cavity through the first reserved hole.

7. The battery pack according to claim 5, characterized in that: The third guide structure includes a fifth protrusion, a sixth protrusion, a plurality of fifth guide strips and a plurality of sixth guide strips; Along the second direction, the fifth protrusion is adjacent to a side of the third baffle plate facing the fourth baffle plate, one end of a plurality of the fifth guide strips is connected to the fifth protrusion, and the other end of the plurality of the fifth guide strips is spaced from the fourth baffle plate, the sixth protrusion is adjacent to a side of the fourth baffle plate facing the third baffle plate, one end of a plurality of the sixth guide strips is connected to the sixth protrusion, and the other end of the plurality of the sixth guide strips is spaced from the third baffle plate; Along the third direction, the plurality of fifth guide bars and the plurality of sixth guide bars are alternately arranged.

8. The battery pack according to claim 7, characterized in that: A second power connector is provided on a side of the second housing facing away from the first housing; A second reserved hole is provided at the bottom of the second installation groove, and the second power connector is communicated with the liquid inlet cavity through the second reserved hole.

9. The battery pack according to claim 7, characterized in that: A first elastic sealing pad is provided between the first housing and the battery, and along the first direction, the first elastic sealing pad overlaps with the first flow guiding structure; A second elastic sealing pad is provided between the partition and the battery, and along the first direction, the second elastic sealing pad overlaps with the second flow-guiding structure; A third elastic sealing pad is provided between the second housing and the battery, and along the first direction, the third elastic sealing pad overlaps with the third flow guiding structure.

Images