A battery pack

Abstract

The present application discloses a battery pack. The battery pack includes a flow channel support. The flow channel support includes a connected limit beam and a first flow channel beam. The limit beam is located between two adjacent single cells. The limit beam and the first flow channel beam are both sealed and connected to the two adjacent single cells. The limit beam and the first flow channel beam cooperate with the two adjacent single cells to enclose a heat exchange cavity. In this way, the heat exchange fluid in the heat exchange cavity can directly contact the single cell, so that the single cell can be efficiently heat exchanged. Moreover, the manner in which the limit beam and the first flow channel beam of the present application cooperate with the two adjacent single cells to enclose the heat exchange cavity can improve the structural reliability of the heat exchange cavity, which is beneficial to ensure the stability of the heat exchange process of the single cell.

Description

Technical Field

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

[0002] In recent years, with the continuous development of new energy vehicles, batteries have been widely used as the power source of new energy vehicles. Batteries are prone to heat during use. If the battery is in a high temperature state for a long time, the battery life will be reduced, and even dangerous situations such as thermal runaway may occur.

[0003] In view of this, liquid cooling channels are usually integrated inside current battery packs to achieve immersion cooling of the battery, keep the battery operating temperature within a reasonable range, ensure battery safety and extend the battery life. However, the structural reliability of the liquid cooling channels inside the current battery pack is poor, which is not conducive to ensuring the stability of the battery liquid cooling process. Summary of the invention

[0004] The present application provides a battery pack that can efficiently exchange heat for single cells and is beneficial for ensuring the stability of the heat exchange process of the single cells.

[0005] The present application provides a battery pack. The battery pack has a first direction. The battery pack includes a box body, and the box body has a containing cavity inside. The battery pack also includes a plurality of single cells, and the plurality of single cells are contained in the containing cavity, and each single cell is arranged along the first direction. The battery pack also includes a plurality of flow channel supports, and the flow channel supports are contained in the containing cavity, and the flow channel supports are located between two adjacent single cells in the first direction. Among them, the flow channel support includes a connected limiting beam and a first flow channel beam, and the limiting beam and the first flow channel beam are both sealed and connected to two adjacent single cells, and the limiting beam and the first flow channel beam cooperate with the two adjacent single cells to enclose a heat exchange cavity, and the first flow channel beam is provided with an inlet connected to the heat exchange cavity.

[0006] In one embodiment of the present application, the battery pack also has a second direction perpendicular to the first direction, the box body includes a box body and an upper cover, and the box body and the upper cover are connected along the second direction to form a accommodating cavity; the limiting beam includes a first limiting beam and a second limiting beam, the first limiting beam is located on the side of the single battery close to the upper cover in the second direction, and the second limiting beam is located on the side of the single battery away from the upper cover in the second direction, the first limiting beam, the second limiting beam and the first flow channel beam cooperate with the two adjacent single batteries to enclose the heat exchange cavity.

[0007] In one embodiment of the present application, the battery pack also has a third direction perpendicular to the first direction and the second direction; the flow channel bracket also includes: a second flow channel beam, the first flow channel beam and the second flow channel beam are respectively connected to the first limiting beam and the second limiting beam on both sides in the third direction, the first limiting beam, the second limiting beam, the first flow channel beam and the second flow channel beam cooperate with the two adjacent single batteries to enclose the heat exchange cavity, and the second flow channel beam is provided with a first outlet connected to the heat exchange cavity.

[0008] In one embodiment of the present application, the flow channel support further includes: a reinforcing beam connected to the first limiting beam and the second limiting beam, and the reinforcing beam is located between the first flow channel beam and the second flow channel beam in the third direction, wherein the reinforcing beam is provided with a flow opening.

[0009] In one embodiment of the present application, the battery pack also includes at least two end plates, an inlet plate and an outlet plate, and the at least two end plates are spaced apart in the first direction, the inlet plate is located on the side of the first flow channel beam away from the second flow channel beam, the inlet plate is arranged opposite to the inlet port, the outlet plate is located on the side of the second flow channel beam away from the first flow channel beam, the outlet plate is arranged opposite to the first outlet, and the at least two end plates, the inlet plate and the outlet plate cooperate to enclose a space for accommodating single cells.

[0010] In one embodiment of the present application, the battery pack also has a third direction perpendicular to the first direction and the second direction; the first limiting beam is respectively connected to the first flow channel beam on both sides of the third direction, the second limiting beam is provided with a second outlet, and the bottom of the box body has an outlet channel connected to the second outlet.

[0011] In one embodiment of the present application, the second outlet is spaced apart from the first flow channel beam in the third direction.

[0012] In one embodiment of the present application, the flow channel support also includes: a reinforcing beam, which is connected to the first limiting beam and the second limiting beam, and the reinforcing beam is located between the first flow channel beams on both sides of the first limiting beam in the third direction, and the reinforcing beam is adjacent to the second outlet on both sides of the third direction.

[0013] In one embodiment of the present application, the box body includes: a bottom plate, having an outlet channel; and side beams, including a first side beam portion, a second side beam portion and a third side beam portion, the first side beam portion and the second side beam portion are spaced apart from each other along a first direction, the third side beam portion is connected between the first side beam portion and the second side beam portion, the bottom plate, the first side beam portion, the second side beam portion and the third side beam portion cooperate to enclose a accommodating cavity; the first side beam portion is provided with an inlet head connected to the accommodating cavity, and the second side beam portion is provided with an outlet head connected to the outlet channel.

[0014] In one embodiment of the present application, the box body also includes: a first guide plate connected to the third side beam portion, wherein the first guide plate is provided with a first guide port; and a second guide plate embedded in the accommodating cavity and dividing the accommodating cavity into at least two sub-cavities, wherein the second guide plate is provided with a second guide port, and the inlet head is connected to the accommodating cavity through the first guide port and the second guide port.

[0015] In one embodiment of the present application, the box body includes: side beams, which surround a receiving cavity; and a guide plate, which is embedded in the receiving cavity, and the guide plate and the side beams are a separate assembly structure, wherein the guide plate is provided with a guide port connected to the heat exchange cavity.

[0016] In one embodiment of the present application, there are multiple flow channel supports, and each flow channel support is arranged along the first direction; among two adjacent flow channel supports in the first direction, one of the flow channel supports has a limiting protrusion, and the other flow channel support has a limiting groove, and the limiting protrusion is embedded in the limiting groove.

[0017] The beneficial effects of the present application are as follows: Different from the prior art, the present application provides a battery pack. The battery pack includes a flow channel bracket. The flow channel bracket includes a connected limiting beam and a first flow channel beam, the limiting beam is located between two adjacent single cells, the limiting beam and the first flow channel beam are both sealed and connected to the two adjacent single cells, and the limiting beam and the first flow channel beam cooperate with the two adjacent single cells to enclose a heat exchange cavity. In this way, the heat exchange fluid in the heat exchange cavity can directly contact the single cell, thereby enabling efficient heat exchange of the single cell. Moreover, the manner in which the limiting beam and the first flow channel beam of the present application cooperate with the two adjacent single cells to enclose a heat exchange cavity can improve the structural reliability of the heat exchange cavity, which is beneficial to ensuring the stability of the heat exchange process of the single cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a structural schematic diagram of an embodiment of a battery pack of the present application;

[0020] Figure 2 yes Figure 1 Schematic diagram of the exploded structure of the battery pack shown;

[0021] Figure 3 is a schematic diagram of a top view of a battery pack according to an embodiment of the present application;

[0022] Figure 4 It is a structural schematic diagram of an embodiment of the flow channel support of the present application;

[0023] Figure 5 yes Figure 4 A schematic diagram of the structure of the flow channel support from a rear view perspective;

[0024] Figure 6a yes Figure 3 A schematic diagram of the cross-sectional structure of the battery pack in the AA direction is shown;

[0025] Figure 6b yes Figure 6a The schematic diagram of the structure of the battery pack C area shown;

[0026] Figure 7 This is a schematic structural diagram of an embodiment of an inlet plate of the present application;

[0027] Figure 8 It is a structural schematic diagram of an embodiment of an outflow plate of the present application;

[0028] Fig. 9 is a structural schematic diagram of another embodiment of the battery pack of the present application;

[0029] Fig.10 yes Fig. 9 Schematic diagram of the exploded structure of the battery pack shown;

[0030] Fig.11 is a structural schematic diagram of another embodiment of the flow channel support of the present application;

[0031] Fig.12 yes Fig. 9 The schematic diagram of the top view of the battery pack shown in the figure omitting the upper cover;

[0032] Fig.13a yes Fig.12 A schematic diagram of the cross-sectional structure of the battery pack in the BB direction is shown;

[0033] Fig.13b yes Fig.13a The structural schematic diagram of the battery pack D area shown;

[0034] Fig.14 It is a structural schematic diagram of an embodiment of the box body of the present application;

[0035] Fig.15 It is a structural schematic diagram of an embodiment of the first guide plate of the present application;

[0036] Fig.16 It is a structural schematic diagram of an embodiment of the second guide plate of the present application.

[0037] Description of reference numerals:

[0038] 10 battery pack; 11 box body; 111 box body; 112 upper cover; 113 bottom plate; 1131 outflow channel; 114 side beam; 1141 first side beam portion; 1142 second side beam portion; 1143 third side beam portion; 115 inlet head; 116 outlet head; 117 guide plate; 1171 first guide plate; 1173 first guide port; 1174 first glue guide groove; 1172 second guide plate; 1175 second guide port; 1176 second glue guide groove; 119 accommodating cavity; 12 single battery; 121 battery pack; 1 22 end plate; 123 inlet plate; 1231 first flow channel inlet; 1232 first flow channel outlet; 124 outlet plate; 1241 second flow channel inlet; 1242 second flow channel outlet; 13 flow channel bracket; 131 limiting beam; 1311 first limiting beam; 1312 second limiting beam; 1313 second flow outlet; 132 first flow channel beam; 1321 inlet; 133 second flow channel beam; 1331 first flow outlet; 134 reinforcing beam; 1341 flow outlet; 135 limiting protrusion; 136 limiting groove; 14 heat exchange chamber. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application and are not used to limit the present application. In the present application, unless otherwise stated, the directional words used, such as "up", "down", "left", and "right", generally refer to the upper, lower, left, and right of the device in actual use or working state, specifically the drawing direction in the accompanying drawings.

[0040] In this application, unless otherwise clearly specified and limited, the terms "connected", "connected", "stacked" and the like should be understood in a broad sense, for example, it can be fixedly connected, detachably connected, or integrated; it can be directly connected, or indirectly connected 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 this application can be understood according to specific circumstances.

[0041] The present application provides a battery pack, which is described in detail below. It should be noted that the description order of the following embodiments does not limit the preferred order of the embodiments of the present application. In the following embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0042] In order to solve the technical problem of poor structural reliability of the liquid cooling channel inside the battery pack in the prior art, an embodiment of the present application provides a battery pack. The battery pack has a first direction. The battery pack includes a box body, and the box body has a containing cavity inside. The battery pack also includes a plurality of single cells, and the plurality of single cells are contained in the containing cavity, and each single cell is arranged along the first direction. The battery pack also includes a plurality of flow channel supports, and the flow channel supports are contained in the containing cavity, and the flow channel supports are located between two adjacent single cells in the first direction. Among them, the flow channel support includes a connected limit beam and a first flow channel beam, and the limit beam and the first flow channel beam are both sealed and connected to two adjacent single cells. The limit beam and the first flow channel beam cooperate with the two adjacent single cells to enclose a heat exchange cavity, and the first flow channel beam is provided with an inlet connected to the heat exchange cavity. It is explained in detail below.

[0043] See also Figure 1 and Figure 2 , Figure 1 is a schematic structural diagram of an embodiment of a battery pack of the present application, Figure 2 yes Figure 1 Schematic diagram of the exploded structure of the battery pack shown.

[0044] In one embodiment, the battery pack 10 includes a box 11 and a plurality of single cells 12, and the plurality of single cells 12 are accommodated in the box 11. The single cells 12 include but are not limited to lithium ion secondary batteries, lithium ion primary batteries, lithium sulfur batteries, sodium lithium ion batteries, sodium ion batteries or magnesium ion batteries, etc., which are not limited in the embodiments of the present disclosure. The battery pack 10 is a power supply for an electrical device. The electrical device may be a mobile phone, a portable device, a laptop computer, a battery car, an electric car, a ship, a spacecraft, an electric toy and an electric tool. For example, a spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft; an electric toy includes a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy and an electric airplane toy; an electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool and an electric tool for railways, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator and an electric planer.

[0045] For details, please refer to Figures 3 to 6b , the battery pack 10 has a first direction (eg Figure 2The box body 11 has a receiving cavity 119 inside. The above-mentioned multiple single cells 12 are received in the receiving cavity 119, and each single cell 12 is arranged along the first direction. The battery pack 10 also includes a plurality of flow channel supports 13, and the flow channel supports 13 are received in the receiving cavity 119. The flow channel supports 13 are located between two adjacent single cells 12 in the first direction, and the flow channel supports 13 cooperate with each adjacent single cell 12 to enclose a heat exchange cavity 14. The heat exchange fluid in the heat exchange cavity 14 can directly contact the single cell 12, so that the single cell 12 can be efficiently heat exchanged, thereby reducing the risk of thermal runaway of the single cell 12.

[0046] It should be noted that the heat exchange process between the heat exchange fluid and the single battery 12 in the embodiment of the present application can be cooling or heating the single battery 12. Taking the working condition of cooling the single battery 12 as an example, the heat exchange fluid can be a coolant, etc., and the heat exchange fluid is passed into the heat exchange cavity 14 to realize liquid cooling design for the single battery 12.

[0047] Furthermore, the outer wall of the single cell 12 includes a top wall, a bottom wall, and a side wall connected between the top wall and the bottom wall. The pole is located on the top wall. For a square battery, the side wall of the single cell 12 includes adjacent wide walls and narrow walls. The flow channel support 13 of the embodiment of the present application can be connected to the wide wall, or the narrow wall, or the bottom wall of the single cell 12, so that the flow channel support 13 and the single cell 12 cooperate to enclose the heat exchange cavity 14. Figure 6a and Figure 6b It is exemplarily shown that the flow channel support 13 is connected to the wide wall of the single battery 12 to cooperate to enclose the heat exchange cavity 14.

[0048] In one embodiment, the flow channel support 13 includes a connected limiting beam 131 and a first flow channel beam 132. The extension direction of the limiting beam 131 is perpendicular to the extension direction of the first flow channel beam 132, and the extension direction of the limiting beam 131 and the extension direction of the first flow channel beam 132 are also perpendicular to the first direction. The limiting beam 131 is located between two adjacent single cells 12 in the first direction, and the limiting beam 131 and the first flow channel beam 132 are both sealed and connected to the two adjacent single cells 12. The limiting beam 131 and the first flow channel beam 132 cooperate with the two adjacent single cells 12 to enclose the heat exchange chamber 14. The first flow channel beam 132 is provided with an inlet 1321 connected to the heat exchange chamber 14, and the heat exchange fluid enters the heat exchange chamber 14 through the inlet 1321. In this way, the limiting beam 131 and the first flow channel beam 132 of this embodiment cooperate with two adjacent single cells 12 to enclose the heat exchange cavity 14, which can improve the structural reliability of the heat exchange cavity 14 and help ensure the stability of the heat exchange process of the single cell 12. In addition, the limiting beam 131 can control the gap between the single cells 12. In addition, the heat exchange cavity 14 can also provide deformation space for the expansion of the single cell 12.

[0049] In one embodiment, the battery pack 10 further has a second direction (eg Figure 2 In the middle direction (as indicated by the arrow Z, the same below) and the third direction (as indicated by the arrow Z Figure 2 As shown by the arrow Y in the middle, the same below), the first direction, the second direction and the third direction are perpendicular to each other. The box body 11 includes a box body 111 and an upper cover 112, and the box body 111 and the upper cover 112 are connected along the second direction to form a accommodating cavity 119. The limiting beam 131 includes a first limiting beam 1311 and a second limiting beam 1312. The first limiting beam 1311 and the second limiting beam 1312 both extend along the third direction. The first limiting beam 1311 is located on the side of the single cell 12 close to the upper cover 112 in the second direction, and the second limiting beam 1312 is located on the side of the single cell 12 away from the upper cover 112 in the second direction. The first limiting beam 1311, the second limiting beam 1312 and the first flow channel beam 132 cooperate with two adjacent single cells 12 to enclose the heat exchange cavity 14. In this way, the heat exchange cavity 14 covers the entire side wall of the single battery 12, so that the entire side wall of the single battery 12 is immersed in the heat exchange fluid, and the heat exchange fluid directly contacts the entire side wall of the single battery 12 to achieve immersion liquid cooling.

[0050] The flow channel support 13 also includes a second flow channel beam 133. The first flow channel beam 132 and the second flow channel beam 133 are respectively connected to the first limiting beam 1311 and the second limiting beam 1312 on both sides in the third direction, that is, the first flow channel beam 132 is connected to the first limiting beam 1311 and the second limiting beam 1312 on one side in the third direction, and the second flow channel beam 133 is connected to the first limiting beam 1311 and the second limiting beam 1312 on the other side in the third direction. The first limiting beam 1311, the second limiting beam 1312, the first flow channel beam 132 and the second flow channel beam 133 cooperate with two adjacent single cells 12 to enclose the heat exchange chamber 14. Among them, the second flow channel beam 133 is provided with a first outlet 1331 connected to the heat exchange chamber 14, and the heat exchange fluid in the heat exchange chamber 14 is discharged through the first outlet 1331. In other words, in this embodiment, the heat exchange fluid enters the heat exchange chamber 14 from the inlet 1321 on the first flow channel beam 132 on the side of the flow channel support 13, and the heat exchange fluid directly contacts the single battery 12 to exchange heat, and then the heat exchange fluid is discharged from the first outlet 1331 on the second flow channel beam 133 on the side of the flow channel support 13.

[0051] Furthermore, the flow channel support 13 also includes a reinforcing beam 134. The reinforcing beam 134 is connected to the first limiting beam 1311 and the second limiting beam 1312, and the reinforcing beam 134 is located between the first flow channel beam 132 and the second flow channel beam 133 in the third direction. Among them, the reinforcing beam 134 is provided with a flow port 1341, and the heat exchange fluid entering from the inlet 1321 is transmitted to the first outlet 1331 through the flow port 1341. The reinforcing beam 134 of this embodiment can enhance the overall structural strength of the flow channel support 13 to further improve the structural reliability of the heat exchange chamber 14, and the reinforcing beam 134 is provided with a flow port 1341 to support the normal flow of the heat exchange fluid.

[0052] In one embodiment, the single cells 12 in the battery pack 10 are arranged in groups, that is, the single cells 12 form a battery pack. For each group of battery packs, the battery pack 10 is respectively provided with at least two end plates 122, an inlet plate 123 and an outlet plate 124. The at least two end plates 122 are spaced apart in the first direction. The inlet plate 123 is located on the side of the first flow channel beam 132 away from the second flow channel beam 133, the inlet plate 123 is arranged opposite to the inlet port 1321, and the heat exchange fluid flows from the inlet plate 123 into the inlet port 1321. The outlet plate 124 is located on the side of the second flow channel beam 133 away from the first flow channel beam 132, the outlet plate 124 is arranged opposite to the first outlet port 1331, and the heat exchange fluid flowing out of the first outlet port 1331 flows into the outlet plate 124 and is discharged through the outlet plate 124. The at least two end plates 122 , the inlet plate 123 and the outlet plate 124 cooperate to enclose a space for accommodating the single cells 12 , that is, the grouped single cells 12 are accommodated in the space enclosed by the at least two end plates 122 , the inlet plate 123 and the outlet plate 124 .

[0053] In the above manner, the inlet plate 123 and the outlet plate 124 of this embodiment replace the side plate and the end plate 122 to cooperate to enclose a space for accommodating the single battery 12, which can simplify the structure of the battery pack 121 on the basis of realizing the heat exchange design of the single battery 12, which is beneficial to improve the energy density of the battery pack 10 and reduce the overall weight and cost of the battery pack 10. For details, please refer to Figure 7 The inlet plate 123 has a first flow channel inlet 1231 and a first flow channel outlet 1232. The inlet plate 123 is arranged opposite to the first flow channel beam 132. The heat exchange fluid enters the inlet plate 123 from the first flow channel inlet 1231. The number of the first flow channel outlets 1232 can be multiple, and each first flow channel outlet 1232 is spaced apart along the first direction. The heat exchange fluid in the inlet plate 123 is output through each first flow channel outlet 1232 and enters the heat exchange chamber 14 through the inlet 1321 on the first flow channel beam 132. Please refer to Figure 8, the outflow plate 124 has a second flow channel inlet 1241 and a second flow channel outlet 1242. The outflow plate 124 is arranged opposite to the second flow channel beam 133. The number of the second flow channel inlet 1241 can be multiple, and each second flow channel inlet 1241 is spaced apart along the first direction. The heat exchange fluid discharged from the first outlet 1331 of the second flow channel beam 133 enters the outflow plate 124 through the second flow channel inlet 1241, and then is discharged through the second flow channel outlet 1242.

[0054] The single cells 12 are arranged in a row along the first direction, and the multiple single cells 12 of the battery pack 10 are arranged in multiple rows. In a row of single cells 12, the number of flow channel supports 13 can be multiple and also arranged in the first direction, and a flow channel support 13 is arranged between any adjacent single cells 12 to form a heat exchange cavity 14 between the adjacent single cells 12. The reinforcing beam 134 divides the heat exchange cavity 14 into two parts in the third direction, and the two parts of the heat exchange cavity 14 are respectively arranged corresponding to the single cells 12 in different columns. Among the two adjacent flow channel supports 13 in the first direction, one of the flow channel supports 13 is convexly provided with a limiting protrusion 135, and the other flow channel support 13 has a limiting groove 136, and the limiting protrusion 135 is embedded in the limiting groove 136 to fix the two adjacent flow channel supports 13.

[0055] Please also read Figures 9 to 13b , Fig. 9 is a structural schematic diagram of another embodiment of the battery pack of the present application, Fig.10 yes Fig. 9 The exploded structure diagram of the battery pack shown is as follows. Fig.11 is a structural schematic diagram of another embodiment of the flow channel support of the present application, Fig.12 yes Fig. 9 The schematic diagram of the top view of the battery pack without the upper cover is shown. Fig.13a yes Fig.12 The schematic diagram of the cross-sectional structure of the battery pack in the BB direction is shown. Fig.13b yes Fig.13a Schematic diagram of the structure of the battery pack D area shown.

[0056] In an alternative embodiment, the first limiting beam 1311 is connected to the first flow channel beam 132 on both sides in the third direction, the second limiting beam 1312 is provided with a second outlet 1313, the bottom of the box body 111 has an outlet channel 1131 connected to the second outlet 1313, the heat exchange fluid enters the heat exchange chamber 14 from the inlet 1321 on both sides, and is discharged in sequence through the second outlet 1313 and the outlet channel 1131. In other words, this embodiment is different from the above embodiment in that the heat exchange fluid enters the heat exchange chamber 14 from the inlet 1321 on both sides of the flow channel bracket 13, and is discharged from the second outlet 1313 at the bottom of the heat exchange chamber 14.

[0057] Please also refer to Fig.14 The box body 111 includes a bottom plate 113, and the bottom plate 113 has an outflow channel 1131. The box body 111 also includes a side beam 114, and the side beam 114 is used to enclose the accommodating chamber 119. The side beam 114 includes a first side beam portion 1141, a second side beam portion 1142, and a third side beam portion 1143. The first side beam portion 1141 and the second side beam portion 1142 are spaced apart from each other along the first direction, and the third side beam portion 1143 is connected between the first side beam portion 1141 and the second side beam portion 1142. The bottom plate 113, the first side beam portion 1141, the second side beam portion 1142, and the third side beam portion 1143 cooperate to enclose the accommodating chamber 119. The first side beam portion 1141 is provided with an inlet head 115 communicating with the accommodating chamber 119, and the second side beam portion 1142 is provided with an outlet head 116 communicating with the outflow channel 1131. In other words, the heat exchange fluid enters through the inlet head 115 and enters the heat exchange chamber 14 from the inlet ports 1321 on both sides of the flow channel support 13. The heat exchange fluid in the heat exchange chamber 14 is discharged from the second outlet port 1313 at the bottom to the outlet channel 1131. The heat exchange fluid in the outlet channel 1131 is finally discharged to the outside of the battery pack 10 through the outlet head 116.

[0058] Furthermore, the second outlet 1313 is spaced apart from the first flow channel beam 132 in the third direction. In other words, the second outlet 1313 of the present embodiment is relatively far away from the inlet 1321 on the first flow channel beam 132, which is conducive to the heat exchange fluid entering from the inlet 1321 to fill the heat exchange cavity 14 as much as possible, and reduces the risk that the heat exchange fluid entering from the inlet 1321 does not fill the heat exchange cavity 14 and is directly discharged from the second outlet 1313. Optionally, the flow channel support 13 of the present embodiment also includes a reinforcing beam 134. The reinforcing beam 134 is connected to the first position limiting beam 1311 and the second position limiting beam 1312, and the reinforcing beam 134 is located between the first flow channel beams 132 on both sides of the first position limiting beam 1311 in the third direction. The reinforcing beam 134 is adjacent to the second outlet 1313 on both sides in the third direction.

[0059] In one embodiment, the housing 11 further includes a guide plate 117. The guide plate 117 is provided with a guide port communicating with the heat exchange chamber 14. The inlet head 115 is communicated with the accommodating chamber 119 through the guide port. Specifically, the guide plate 117 includes a first guide plate 1171. The first guide plate 1171 is connected to the third side beam portion 1143, and the first guide plate 1171 is provided with a first guide port 1173. The guide plate 117 further includes a second guide plate 1172, which is embedded in the accommodating chamber 119 and divides the accommodating chamber 119 into at least two sub-cavities. The first guide plate 1171 and the second guide plate 1172 both extend in the first direction, and the second guide plate 1172 divides the accommodating chamber 119 into at least two sub-cavities in the third direction, and each sub-cavity is used to accommodate the single cells 12 in a row. The second guide plate 1172 is provided with a second guide port 1175. The inlet head 115 is connected to the accommodating cavity 119 through the first guide port 1173 and the second guide port 1175 .

[0060] The interior of the first side beam 1141 is a hollow structure, and the interior of the first side beam 1141 is connected to the first guide plate 1171 and the second guide plate 1172 respectively. The heat exchange fluid entering from the inlet head 115 first flows along the interior of the first side beam 1141, and then flows to the first guide plate 1171 and the second guide plate 1172 respectively. The heat exchange fluid flowing to the first guide plate 1171 is output through the first guide port 1173, and the heat exchange fluid flowing to the second guide plate 1172 is output through the second guide port 1175 and flows into the heat exchange chamber 14. The heat exchange fluid in the heat exchange chamber 14 is discharged from the second outlet port 1313 at the bottom to the outlet channel 1131, and the heat exchange fluid in the outlet channel 1131 is finally discharged to the outside of the battery pack 10 through the outlet head 116.

[0061] In an exemplary embodiment, if Fig.14 As shown, the guide plate and the side beam 114 are an integrated structure, that is, the first guide plate 1171 and the second guide plate 1172 are integrally formed with the side beam 114. In this way, the assembly process of the guide plate and the side beam 114 can be omitted, which is conducive to simplifying the assembly process of the battery pack 10.

[0062] In another exemplary embodiment, the guide plate and the side beam 114 are separate assembly structures, that is, the guide plate and the side beam 114 are independent parts before assembly, and the guide plate and the side beam 114 are assembled to form a complete box body 11. The guide plate and the side beam 114 can be sealed and connected by gluing. For details, please refer to Fig.15 and Fig.16The first guide plate 1171 has a first glue guide groove 1174, which is used to fill the structural glue to bond with the third side beam portion 1143 and achieve a sealing effect. The first guide plate 1171 can be provided with first glue guide grooves 1174 on both sides in the second direction. The second guide plate 1172 has a second glue guide groove 1176, and the second guide plate 1172 is provided with a second glue guide groove 1176 at the bottom in the second direction. The second glue guide groove 1176 is used to fill the structural glue to bond with the bottom plate 113 and achieve a sealing effect.

[0063] Of course, in other embodiments of the present application, the guide plate and the side beam 114 are not limited to the adhesive connection method. For example, the guide plate and the side beam 114 can be locked by fasteners such as screws, and the sealing effect can be achieved in conjunction with sealing elements such as sealing rings. This is not limited here.

[0064] In summary, the present application provides a battery pack. The battery pack includes a flow channel support. The flow channel support includes a connected limit beam and a first flow channel beam, the limit beam is located between two adjacent single cells, the limit beam and the first flow channel beam are both sealed and connected to the two adjacent single cells, and the limit beam and the first flow channel beam cooperate with the two adjacent single cells to enclose a heat exchange cavity. In this way, the heat exchange fluid in the heat exchange cavity can directly contact the single cell, so that the single cell can be efficiently heat exchanged. Moreover, the manner in which the limit beam and the first flow channel beam of the present application cooperate with the two adjacent single cells to enclose the heat exchange cavity can improve the structural reliability of the heat exchange cavity, which is beneficial to ensuring the stability of the heat exchange process of the single cell.

[0065] The battery pack provided by the present application is introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A battery pack, characterized in that: The battery pack has a first direction, and the battery pack includes: A box body having a containing cavity inside; A plurality of single cells are accommodated in the accommodation cavity, and each of the single cells is arranged along the first direction; and A plurality of flow channel supports are accommodated in the accommodating cavity, wherein the flow channel supports are located between two adjacent single cells in the first direction; The flow channel support includes a connected limiting beam and a first flow channel beam, the limiting beam and the first flow channel beam are both sealed and connected to two adjacent single cells, the limiting beam and the first flow channel beam cooperate with the two adjacent single cells to enclose a heat exchange cavity, and the first flow channel beam is provided with an inlet connected to the heat exchange cavity; The battery pack also has a second direction and a third direction, the first direction, the second direction and the third direction are perpendicular to each other, the box body includes a box body and an upper cover, the box body and the upper cover are connected along the second direction to form the accommodating cavity; The limiting beam comprises a first limiting beam and a second limiting beam, wherein the first limiting beam is located at a side of the single cell close to the upper cover in the second direction, and the second limiting beam is located at a side of the single cell away from the upper cover in the second direction; The first flow channel beams are connected to the first limit beams at both sides in the third direction respectively, and the second limit beam is provided with a second flow outlet; the second flow outlet is spaced apart from the first flow channel beam in the third direction.

2. The battery pack according to claim 1, characterized in that: The first limiting beam, the second limiting beam and the first flow channel beam cooperate with two adjacent single batteries to enclose the heat exchange cavity.

3. The battery pack according to claim 2, characterized in that: The battery pack also has a third direction perpendicular to the first direction and the second direction; The flow channel support also includes: The second flow channel beam, the first flow channel beam and the second flow channel beam are respectively connected to the first limiting beam and the second limiting beam on both sides of the third direction, the first limiting beam, the second limiting beam, the first flow channel beam and the second flow channel beam cooperate with the two adjacent single batteries to enclose the heat exchange cavity, and the second flow channel beam is provided with a first outlet connected to the heat exchange cavity.

4. The battery pack according to claim 3, characterized in that: The flow channel support also includes: A reinforcing beam is connected to the first limiting beam and the second limiting beam, and the reinforcing beam is located between the first flow channel beam and the second flow channel beam in the third direction, wherein the reinforcing beam is provided with a flow opening.

5. The battery pack according to claim 3, characterized in that: The battery pack also includes at least two end plates, an inlet plate and an outlet plate, the at least two end plates are spaced apart in the first direction, the inlet plate is located on the side of the first flow channel beam away from the second flow channel beam, the inlet plate is arranged opposite to the inlet port, the outlet plate is located on the side of the second flow channel beam away from the first flow channel beam, the outlet plate is arranged opposite to the first outlet port, and the at least two end plates, the inlet plate and the outlet plate cooperate to enclose a space for accommodating the single battery.

6. The battery pack according to claim 2, characterized in that: The bottom of the box body has an outflow channel communicating with the second outflow port.

7. The battery pack according to claim 6, characterized in that: The flow channel support also includes: A reinforcing beam is connected to the first limiting beam and the second limiting beam, and the reinforcing beam is located between the first flow channel beams on both sides of the first limiting beam in the third direction, and the reinforcing beam is adjacent to the second outlet on both sides in the third direction.

8. The battery pack according to claim 6, characterized in that: The box body comprises: a bottom plate having the outflow channel; and The side beam comprises a first side beam portion, a second side beam portion and a third side beam portion, the first side beam portion and the second side beam portion are spaced apart from each other along the first direction, the third side beam portion is connected between the first side beam portion and the second side beam portion, the bottom plate, the first side beam portion, the second side beam portion and the third side beam portion cooperate to enclose the accommodating cavity; the first side beam portion is provided with an inlet head connected to the accommodating cavity, and the second side beam portion is provided with an outlet head connected to the outlet channel.

9. The battery pack according to claim 8, characterized in that: The box also includes: A first guide plate connected to the third side beam portion, wherein the first guide plate is provided with a first guide port; and The second guide plate is embedded in the accommodating cavity and divides the accommodating cavity into at least two sub-cavities, wherein the second guide plate is provided with a second guide port, and the inlet head is connected with the accommodating cavity through the first guide port and the second guide port.

10. The battery pack according to claim 1, characterized in that: The box body comprises: side beams, surrounding the accommodating cavity; and The guide plate is embedded in the accommodating cavity, and the guide plate and the side beam are a separate assembly structure, wherein the guide plate is provided with a guide port communicated with the heat exchange cavity.

11. The battery pack according to claim 1, characterized in that: There are multiple flow channel supports, and each of the flow channel supports is arranged along the first direction; Among the two adjacent flow channel supports in the first direction, one of the flow channel supports is provided with a limiting protrusion, and the other flow channel support has a limiting groove, and the limiting protrusion is embedded in the limiting groove.

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