Battery device

Abstract

The present disclosure relates to the field of battery technology, and discloses a battery device; the battery device includes a heat exchange plate, a battery pack, a liquid inlet joint and a liquid outlet joint; a heat exchange flow channel is arranged in the heat exchange plate; the battery pack is arranged on one side of the heat exchange plate; at least one of the liquid inlet joint and the liquid outlet joint is arranged on the side of the heat exchange plate away from the battery pack, and the orthographic projection of at least one of the liquid inlet joint and the liquid outlet joint on the heat exchange plate overlaps with the heat exchange plate at least partially; the liquid inlet joint is connected to the heat exchange flow channel, and the liquid outlet joint is connected to the heat exchange flow channel. The battery device occupies a small space, so that when the battery device is matched with an electrical device, the volume of the battery device is less affected; when the heat exchange medium flows out through the damaged part of the liquid inlet joint and / or the liquid outlet joint arranged on the side of the heat exchange plate away from the battery pack, the heat exchange medium will flow downward due to gravity, and the heat exchange medium will not flow to the battery pack, thereby avoiding safety accidents caused by short circuits between single cells caused by the heat exchange medium.

Description

Technical Field

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

[0002] At present, the battery device is provided with a heat exchange plate, through which the battery pack is heat exchanged to ensure that the battery pack can maintain a relatively suitable temperature; the heat exchange plate needs to allow the heat exchange medium to flow in through the liquid inlet joint and out through the liquid outlet joint to ensure the fluidity of the heat exchange medium; however, the length of the liquid inlet joint and the liquid outlet joint are relatively long, resulting in the liquid inlet joint and the liquid outlet joint occupying a larger space; moreover, when the liquid inlet joint or the liquid outlet joint is damaged, when the heat exchange medium flows out through the damaged part of the liquid inlet joint or the liquid outlet joint, the heat exchange medium will flow to the battery pack, causing a short circuit between the single cells, thereby causing a safety accident.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0004] The purpose of the present disclosure is to overcome the shortcomings of the above-mentioned related art that the liquid inlet and outlet joints occupy a large space and the heat exchange medium will flow to the battery pack, and to provide a battery device in which the liquid inlet and outlet joints occupy a small space and the heat exchange medium will not flow to the battery pack.

[0005] According to one aspect of the present disclosure, there is provided a battery device, comprising:

[0006] A heat exchange plate, wherein a heat exchange channel is arranged in the heat exchange plate;

[0007] A battery pack is arranged on one side of the heat exchange plate;

[0008] A liquid inlet joint and a liquid outlet joint, at least one of which is arranged on a side of the heat exchange plate away from the battery pack, and an orthographic projection of at least one of the liquid inlet joint and the liquid outlet joint on the heat exchange plate at least partially overlaps with the heat exchange plate; the liquid inlet joint is connected to the heat exchange channel, and the liquid outlet joint is connected to the heat exchange channel.

[0009] In the battery device disclosed in the present invention, at least one of the liquid inlet joint and the liquid outlet joint is arranged on the side of the heat exchange plate away from the battery pack, and the orthographic projection of at least one of the liquid inlet joint and the liquid outlet joint on the heat exchange plate at least partially overlaps with the heat exchange plate; on the one hand, at least one of the liquid inlet joint and the liquid outlet joint is arranged to overlap with the heat exchange plate and the battery pack, reducing the space occupied by the liquid inlet joint and / or the liquid outlet joint, so that the battery device occupies a smaller space, so that when the battery device is matched with the electrical equipment, the volume of the battery device is less affected; on the other hand, in the case that the liquid inlet joint and / or the liquid outlet joint arranged on the side of the heat exchange plate away from the battery pack is damaged, when the heat exchange medium flows out through the damaged part of the liquid inlet joint and / or the liquid outlet joint, the heat exchange medium will flow downward due to the effect of gravity, and the heat exchange medium will not flow to the battery pack, thereby avoiding safety accidents caused by short circuits between single cells caused by the heat exchange medium.

[0010] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0012] Figure 1 FIG. 1 is a schematic structural diagram of an exemplary embodiment of a battery device disclosed herein.

[0013] Figure 2 In accordance with Figure 1 Schematic diagram of the cross-sectional view of the AA section in .

[0014] Figure 3 FIG. 4 is a schematic structural diagram of another exemplary embodiment of a battery device disclosed herein.

[0015] Description of reference numerals:

[0016] 1. Battery pack; 11. Single cell;

[0017] 2. Heat exchange plate; 21. Liquid inlet; 22. Liquid outlet; 23. Heat exchange flow channel;

[0018] 3. Liquid inlet connector; 31. Liquid inlet connector body; 32. First lug;

[0019] 4. liquid outlet connector; 41. liquid outlet connector body; 42. second lug;

[0020] 5. Battery box; 51. Bottom guard plate; 511. First avoidance portion; 512. Second avoidance portion; 513. Protrusion; 514. Concave portion; 515. Frame portion; 52. Protective cover; 53. First side beam;

[0021] 6. Support plate; 61. Third avoidance portion; 62. Fourth avoidance portion;

[0022] 71. first sealing ring; 72. second sealing ring;

[0023] 81. Liquid inlet pipe; 82. Liquid outlet pipe;

[0024] 9. Fixing bolts;

[0025] X, first direction; Y, second direction; Z, height direction. DETAILED DESCRIPTION

[0026] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present disclosure will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted. In addition, the drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale.

[0027] Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of the illustration to another component, these terms are used in this specification only for convenience, such as according to the orientation of the examples described in the drawings. It is understood that if the device of the illustration is turned upside down, the component described as "upper" will become the component "lower". When a structure is "on" other structures, it may mean that the structure is formed integrally on the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.

[0028] The terms "a", "an", "the", "said" and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express an open-ended inclusive meaning and mean that additional elements / components / etc. may exist in addition to the listed elements / components / etc.; the terms "first", "second" and "third" etc. are used merely as labels and are not intended to limit the quantity of their objects.

[0029] In this application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. "And / or" is just a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the previous and next associated objects are in an "or" relationship.

[0030] The present disclosure provides a battery device according to an exemplary embodiment. Figure 1-Figure 3 As shown, the battery device may include a heat exchange plate 2, a battery pack 1, a liquid inlet joint 3 and a liquid outlet joint 4; a heat exchange channel 23 is arranged in the heat exchange plate 2; the battery pack 1 is arranged on one side of the heat exchange plate 2; at least one of the liquid inlet joint 3 and the liquid outlet joint 4 is arranged on the side of the heat exchange plate 2 away from the battery pack 1, and the orthographic projection of at least one of the liquid inlet joint 3 and the liquid outlet joint 4 on the heat exchange plate 2 at least partially overlaps with the heat exchange plate 2; the liquid inlet joint 3 is connected to the heat exchange channel 23, and the liquid outlet joint 4 is connected to the heat exchange channel 23.

[0031] In the battery device disclosed herein, on the one hand, at least one of the liquid inlet connector 3 and the liquid outlet connector 4 is overlapped with the heat exchange plate 2 and the battery pack 1, thereby reducing the space occupied by the liquid inlet connector 3 and / or the liquid outlet connector 4, so that the battery device occupies a smaller space, so that when the battery device is matched with the electrical equipment, the volume of the battery device is less affected by the factor; on the other hand, in the case that the liquid inlet connector 3 and / or the liquid outlet connector 4 arranged on the side of the heat exchange plate 2 away from the battery pack 1 is damaged, when the heat exchange medium flows out through the damaged part of the liquid inlet connector 3 and / or the liquid outlet connector 4, the heat exchange medium will flow downward due to the effect of gravity, and the heat exchange medium will not flow to the battery pack 1, thereby avoiding safety accidents caused by short circuits between single cells 11 caused by the heat exchange medium.

[0032] In this example implementation, refer to Figure 1 and Figure 2As shown, the battery device may include a battery box 5, and the battery box 5 may include a bottom guard plate 51, a protective cover 52, two first side beams 53 and two second side beams (not shown in the figure), and the bottom guard plate 51 and the protective cover 52 may be set to a rectangle. Two first side beams 53 and two second side beams are arranged around the bottom guard plate 51, and the two first side beams 53 and the two second side beams are connected end to end in sequence to form a rectangular frame, and the first side beam 53 extends along the first direction X, and the second side beam extends along the second direction Y. A first opening is arranged on the other side of the two first side beams 53 and the two second side beams opposite to the bottom guard plate 51, and a protective cover 52 is provided on the first opening, so that the protective cover 52 is arranged opposite to the bottom guard plate 51, and the two first side beams 53 and the two second side beams are connected between the protective cover 52 and the bottom guard plate 51. The bottom guard plate 51, the two first side beams 53 and the two second side beams surround and form a accommodating cavity of the battery box 5.

[0033] Of course, in other exemplary embodiments of the present disclosure, the bottom guard plate 51 and the protective cover 52 may be set to be circular, elliptical, trapezoidal, etc., and the side beams may be set to be one or more, and they are surrounded to form a circular, elliptical, trapezoidal, etc. shape, so that the battery box 5 is formed into a cylindrical, elliptical column, prism, etc. The battery box 5 may also be in other shapes, which are not described one by one here.

[0034] In this example implementation, refer to Figure 2 As shown, a battery pack 1 is arranged in the accommodating cavity. A group of battery packs 1 may include at least two single cells 11. At least two single cells 11 are arranged in sequence along a first direction X to form a group of battery packs 1. At least two groups of battery packs 1 are arranged in sequence along a second direction Y.

[0035] In this example implementation, refer to Figure 2 As shown, a heat exchange plate 2 is also provided in the accommodating cavity, and the heat exchange plate 2 is provided between the battery pack 1 and the bottom guard plate 51, so that the battery pack 1 is provided on one side of the heat exchange plate 2. A heat exchange channel 23 is provided in the heat exchange plate 2. When the battery pack 1 needs to be heated, a heat exchange medium with a higher temperature can be introduced into the heat exchange channel 23, and the heat of the heat exchange medium is transferred to the battery pack 1 to achieve heating of the battery pack 1; when the battery pack 1 needs to be cooled, a heat exchange medium with a lower temperature can be introduced into the heat exchange channel 23, and the heat of the battery pack 1 is transferred to the heat exchange medium to achieve cooling of the battery pack 1. A liquid inlet 21 and a liquid outlet 22 are provided on the side of the heat exchange plate 2 away from the battery pack 1, and the liquid inlet 21 is connected to the head end of the heat exchange channel 23, and the liquid outlet 22 is connected to the tail end of the heat exchange channel 23.

[0036] In addition, in some other example embodiments of the present disclosure, the bottom guard plate 51 may not be provided, and the heat exchange plate 2 may be used as the bottom guard plate 51 at the same time, that is, the heat exchange plate 2 not only plays the role of exchanging heat for the single battery 11, but also plays the role of supporting the single battery 11.

[0037] In this example implementation, refer to Figure 2 As shown, the liquid inlet joint 3 is connected to the liquid inlet 21 of the heat exchange channel 23, and the heat exchange medium is introduced through the liquid inlet joint 3; the liquid outlet joint 4 is connected to the liquid outlet 22 of the heat exchange channel 23, and the heat exchange medium flows out through the liquid outlet joint 4 to ensure the fluidity of the heat exchange medium.

[0038] In this exemplary embodiment, the liquid inlet joint 3 is arranged on the side of the heat exchange plate 2 away from the battery pack 1, and the liquid outlet joint 4 is also arranged on the side of the heat exchange plate 2 away from the battery pack 1; moreover, the orthographic projection of the liquid inlet joint 3 on the heat exchange plate 2 at least partially overlaps with the heat exchange plate 2, and the orthographic projection of the liquid outlet joint 4 on the heat exchange plate 2 at least partially overlaps with the heat exchange plate 2. The space occupied by the liquid inlet joint 3 and the liquid outlet joint 4 in the length direction is reduced, so that the battery device occupies a smaller space, so that when the battery device is matched with the electrical equipment, the volume of the battery device is less affected; moreover, in the case of damage to the liquid inlet joint 3 and / or the liquid outlet joint 4, when the heat exchange medium flows out through the damaged part of the liquid inlet joint 3 and / or the liquid outlet joint 4, the heat exchange medium will flow downward due to the effect of gravity, and the heat exchange medium will not flow to the battery pack 1, thereby avoiding safety accidents caused by short circuits between single cells 11 caused by the heat exchange medium.

[0039] Of course, in some other exemplary embodiments of the present disclosure, the liquid inlet joint 3 may be arranged only on the side of the heat exchange plate 2 away from the battery pack 1, and the orthographic projection of the liquid inlet joint 3 on the heat exchange plate 2 at least partially overlaps with the heat exchange plate 2; while the liquid outlet joint 4 is not arranged on the side of the heat exchange plate 2 away from the battery pack 1. Alternatively, the liquid outlet joint 4 may be arranged only on the side of the heat exchange plate 2 away from the battery pack 1, and the orthographic projection of the liquid outlet joint 4 on the heat exchange plate 2 at least partially overlaps with the heat exchange plate 2; while the liquid inlet joint 3 is not arranged on the side of the heat exchange plate 2 away from the battery pack 1.

[0040] Furthermore, the orthographic projection of the liquid inlet joint 3 on the heat exchange plate 2 is located inside the heat exchange plate 2, so that the liquid inlet joint 3 does not protrude from the edge of the heat exchange plate 2; the orthographic projection of the liquid outlet joint 4 on the heat exchange plate 2 is located inside the heat exchange plate 2, so that the liquid outlet joint 4 does not protrude from the edge of the heat exchange plate 2. The space occupied by the liquid inlet joint 3 and the liquid outlet joint 4 in the length direction is further reduced, and it can be said that the liquid inlet joint 3 and the liquid outlet joint 4 do not occupy additional space in the length direction, so that the space occupied by the battery device is further reduced, so that when the battery device is matched with the electrical equipment, the factor affected by the volume of the battery device is further reduced.

[0041] Reference Figure 1 and Figure 2 As shown, in the case where the battery device includes a bottom guard plate 51, a first avoidance portion 511 and a second avoidance portion 512 may be provided on the bottom guard plate 51. In the case where the first avoidance portion 511 and the second avoidance portion 512 are provided at the edge of the bottom guard plate 51, the first avoidance portion 511 and the second avoidance portion 512 are not closed on one side close to the edge, that is, the first avoidance portion 511 may be a first notch provided on the bottom guard plate 51, and the second avoidance portion 512 may be a second notch provided on the bottom guard plate 51. In the case where the first avoidance portion 511 and the second avoidance portion 512 are not provided at the edge of the bottom guard plate 51, the first avoidance portion 511 may be a first through hole provided on the bottom guard plate 51, and the second avoidance portion 512 may be a second through hole provided on the bottom guard plate 51.

[0042] The liquid inlet joint 3 passes through the first avoidance portion 511 so that the liquid inlet joint 3 can be connected to the liquid inlet 21 of the heat exchange channel 23 ; the liquid outlet joint 4 passes through the second avoidance portion 512 so that the liquid outlet joint 4 can be connected to the liquid outlet 22 of the heat exchange channel 23 .

[0043] Of course, when the liquid inlet joint 3 is only arranged on the side of the heat exchange plate 2 away from the battery group 1, only the first avoidance portion 511 can be provided on the bottom protective plate 51; when the liquid outlet joint 4 is only arranged on the side of the heat exchange plate 2 away from the battery group 1, only the second avoidance portion 512 can be provided on the bottom protective plate 51.

[0044] In this exemplary embodiment, a protrusion 513 protruding toward the side away from the heat exchange plate 2 is provided on the bottom guard plate 51. Specifically, the bottom guard plate 51 may include a frame portion 515 and the protrusion 513. The frame portion 515 is provided as a rectangular frame adapted to the heat exchange plate 2, the protrusion 513 is connected to the frame portion 515, and the protrusion 513 and the frame portion 515 are integrally formed. The specific forming method is: a flat plate may be provided, and the protrusion 513 is formed by stamping the flat plate from the side of the flat plate close to the battery pack 1 after installation. The frame portion 515 is attached to and fixedly connected to the heat exchange plate 2, so that a gap is set between the protrusion 513 and the heat exchange plate 2. When the bottom guard plate 51 is impacted, the bottom guard plate 51 has a retraction space to prevent the impact force from being directly transmitted to the heat exchange plate 2 and the battery pack 1, which not only prevents the heat exchange plate 2 from being broken due to the impact force, but also prevents the battery pack 1 from being damaged due to the impact force; and the gap is filled with air, which has a certain thermal insulation effect on the heat exchange plate 2, reduces the heat exchange between the heat exchange plate 2 and the outside world, and allows the heat exchange plate 2 to exchange heat with the battery pack 1 as much as possible.

[0045] Moreover, a recessed portion 514 is provided on the protruding portion 513, which is recessed toward one side of the heat exchange plate 2. The recessed depth of the recessed portion 514 is less than the protruding height of the protruding portion 513, so that a gap is also provided between the recessed portion 514 and the heat exchange plate 2. At least part of the liquid inlet joint 3 and at least part of the liquid outlet joint 4 are provided in the recessed portion 514. For example, a part of the liquid inlet joint 3 and a part of the liquid outlet joint 4 may be provided in the recessed portion 514, so that the space occupied by the liquid inlet joint 3 and the liquid outlet joint 4 in the height direction Z of the battery device is also small. Alternatively, the entirety of the liquid inlet joint 3 and the entirety of the liquid outlet joint 4 may be provided in the recessed portion 514, so that the liquid inlet joint 3 and the liquid outlet joint 4 do not occupy additional space in the height direction Z of the battery device, so that the volume of the battery device is small, and when the battery device is matched with the electrical equipment, the factor affected by the volume of the battery device is small. The height direction Z is perpendicular to both the first direction X and the second direction Y.

[0046] Of course, when only the liquid inlet joint 3 is disposed on the side of the heat exchange plate 2 away from the battery pack 1, at least a portion of the liquid inlet joint 3 may be disposed in the recessed portion 514. When only the liquid outlet joint 4 is disposed on the side of the heat exchange plate 2 away from the battery pack 1, at least a portion of the liquid outlet joint 4 may be disposed in the recessed portion 514.

[0047] Further, refer to Figure 1 and Figure 2 As shown, the recessed portion 514 can be arranged at the corner of the protruding portion 513, so that the protruding portion 513 is not arranged on both sides of the recessed portion 514; specifically, the recessed portion 514 can occupy two edges of the protruding portion 513, and the recessed portion 514 can be arranged in a rectangular shape, and the protruding portions 513 are arranged on two sides of the recessed portion 514, and the protruding portions 513 are not arranged on the other two sides of the recessed portion 514. The liquid inlet pipe 81 is connected to the liquid inlet joint 3, and the liquid outlet pipe 82 is connected to the liquid outlet joint 4. The liquid inlet pipe 81 and the liquid outlet pipe 82 can extend from the side of the recessed portion 514 where the protruding portion 513 is not arranged to connect to an external water pump, water source, etc.

[0048] Of course, in some other exemplary embodiments of the present disclosure, reference Figure 3As shown, the recessed portion 514 may also be provided at the edge of the protruding portion 513, so that the protruding portion 513 is not provided on one side of the recessed portion 514; specifically, the recessed portion 514 may occupy one edge of the protruding portion 513, and the recessed portion 514 may be provided in a rectangular shape, and the protruding portion 513 is provided on three sides of the recessed portion 514, and the protruding portion 513 is not provided on the other side of the recessed portion 514. The liquid inlet pipe 81 is connected to the liquid inlet joint 3, and the liquid outlet pipe 82 is connected to the liquid outlet joint 4. The liquid inlet pipe 81 and the liquid outlet pipe 82 may extend from the side of the recessed portion 514 where the protruding portion 513 is not provided to connect to an external water pump, water source, etc.

[0049] In addition, the recessed portion 514 may not be arranged at the corner or edge of the protruding portion 513. In this case, if the entirety of the liquid inlet joint 3 and the entirety of the liquid outlet joint 4 are arranged in the recessed portion 514, the recessed portion 514 may be extended to the edge of the protruding portion 513, so that the liquid inlet pipe 81 connected to the liquid inlet joint 3 and the liquid outlet pipe 82 connected to the liquid outlet joint 4 are also arranged in the recessed portion 514, and extend through the edge to connect to an external water pump or water source; if a portion of the liquid inlet joint 3 and a portion of the liquid outlet joint 4 are arranged in the recessed portion 514, the liquid inlet pipe 81 connected to the liquid inlet joint 3 and the liquid outlet pipe 82 connected to the liquid outlet joint 4 may extend across the protruding portion 513 to connect to an external water pump or water source.

[0050] Moreover, the liquid inlet connector 3 and the liquid outlet connector 4 can be arranged in the same recessed portion 514, so that only one recessed portion 514 is provided on the protruding portion 513 of the bottom guard plate 51, thereby ensuring the impact resistance of the bottom guard plate 51; and making the structure of the bottom guard plate 51 simple and the preparation process simple.

[0051] Reference Figure 2 As shown, the battery device may further include a support plate 6 , which is disposed between the bottom guard plate 51 and the heat exchange plate 2 .

[0052] The support plate 6 is provided with a third avoidance portion 61 and a fourth avoidance portion 62. When the third avoidance portion 61 and the fourth avoidance portion 62 are provided at the edge of the support plate 6, the side of the third avoidance portion 61 and the fourth avoidance portion 62 close to the edge is not closed, that is, the third avoidance portion 61 may be a third notch provided on the support plate 6, and the fourth avoidance portion 62 may be a fourth notch provided on the support plate 6. When the third avoidance portion 61 and the fourth avoidance portion 62 are not provided at the edge of the support plate 6, the third avoidance portion 61 may be a third through hole provided on the support plate 6, and the fourth avoidance portion 62 may be a fourth through hole provided on the support plate 6.

[0053] The liquid inlet joint 3 passes through the third avoidance portion 61, specifically, the liquid inlet joint 3 passes through the first avoidance portion 511 and the third avoidance portion 61 in sequence, so that the liquid inlet joint 3 can be connected to the liquid inlet 21 of the heat exchange channel 23; the liquid outlet joint 4 passes through the fourth avoidance portion 62, specifically, the liquid outlet joint 4 passes through the second avoidance portion 512 and the fourth avoidance portion 62 in sequence, so that the liquid outlet joint 4 can be connected to the liquid outlet 22 of the heat exchange channel 23.

[0054] The liquid inlet joint 3 and the liquid outlet joint 4 are fixedly connected to the support plate 6. Specifically, the third avoidance portion 61 can be a threaded hole, and the liquid inlet joint 3 is provided with an external thread, and the external thread of the liquid inlet joint 3 is threadedly matched with the threaded hole, so that the liquid inlet joint 3 is fixedly connected to the support plate 6. The fourth avoidance portion 62 can be a threaded hole, and the liquid outlet joint 4 is provided with an external thread, and the external thread of the liquid outlet joint 4 is threadedly matched with the threaded hole, so that the liquid outlet joint 4 is fixedly connected to the support plate 6. Of course, the liquid inlet joint 3 and the liquid outlet joint 4 can also be fixedly connected to the support plate 6 by adhesive.

[0055] The support plate 6 can increase the strength of the bottom guard plate 51, especially the strength of the part of the bottom guard plate 51 where the first avoidance portion 511 and the second avoidance portion 512 are set, so that the connection strength between the liquid inlet joint 3 and the liquid outlet joint 4 and the bottom guard plate 51 is higher, thereby preventing the liquid inlet joint 3 and the liquid outlet joint 4 from detaching from the bottom guard plate 51.

[0056] Of course, when the liquid inlet joint 3 is only arranged on the side of the heat exchange plate 2 away from the battery group 1, only the third avoidance portion 61 can be arranged on the support plate 6; when the liquid outlet joint 4 is only arranged on the side of the heat exchange plate 2 away from the battery group 1, only the fourth avoidance portion 62 can be arranged on the support plate 6.

[0057] Furthermore, the support plate 6 can be located only between the recessed portion 514 and the heat exchange plate 2, that is, the support plate 6 is not arranged between other positions of the protruding portion 513 of the bottom guard plate 51 and the heat exchange plate 2, so that the volume of the support plate 6 is arranged to be smaller, thereby avoiding affecting the energy density of the battery device; moreover, avoiding the support plate 6 from affecting the impact resistance of the bottom guard plate 51.

[0058] In addition, in some other example embodiments of the present disclosure, when the recessed portion 514 is not provided on the bottom guard plate 51, the support plate 6 may also be provided as only a smaller piece, located at the position where the first avoidance portion 511 and the second avoidance portion 512 are provided on the bottom guard plate 51.

[0059] The support plate 6 can be fixedly connected to the bottom guard plate 51. When the material of the support plate 6 is metal, the support plate 6 can be welded to the bottom guard plate 51. The support plate 6 can be fixedly connected to the heat exchange plate 2. Similarly, when the material of the support plate 6 is metal, the support plate 6 can be welded to the heat exchange plate 2. The support plate 6 can be connected to both the bottom guard plate 51 and the heat exchange plate 2. Similarly, when the material of the support plate 6 is metal, the support plate 6 can be welded to the bottom guard plate 51 and the heat exchange plate 2.

[0060] Of course, in some other exemplary embodiments of the present disclosure, the material of the support plate 6 may also be resin, rubber, etc. The support plate 6, the heat exchange plate 2 and the bottom guard plate 51 may also be fixedly connected by screws, adhesives, etc.

[0061] The support plate 6 is fixedly connected to the bottom guard plate 51 and / or the heat exchange plate 2 to prevent the support plate 6 from moving due to vibration when the battery device is vibrated during use, thereby affecting the fixed connection between the support plate 6 and the liquid inlet connector 3 and the liquid outlet connector 4, causing the liquid inlet connector 3 and the liquid outlet connector 4 to separate from the support plate 6.

[0062] In this example embodiment, the side of the support plate 6 close to the heat exchange plate 2 is fixedly connected to the heat exchange plate 2, and the side of the bottom guard plate 51 close to the support plate 6 abuts against the support plate 6, that is, the support plate 6 can be only fixedly connected to the heat exchange plate 2, while the support plate 6 is not fixedly connected to the bottom guard plate 51.

[0063] Compared with “connection”, “abutment” emphasizes the existence of force between the two; that is, “abutment” reflects the state of force between the bottom guard plate 51 and the support plate 6.

[0064] Since the bottom guard plate 51 exerts a force on the support plate 6, which is an upward lifting force, the support plate 6 is only fixedly connected to the heat exchange plate 2, and it is not easy for the support plate 6 and the bottom guard plate 51 to move. Therefore, the process of fixed connection between the support plate 6 and the bottom guard plate 51 can be omitted to improve the production efficiency of the product.

[0065] In this case, the thickness of the support plate 6 is equal to the distance between the side of the recessed portion 514 of the bottom guard plate 51 close to the heat exchange plate 2 and the side of the heat exchange plate 2 close to the bottom guard plate 51. However, in order to achieve the effect that the side of the bottom guard plate 51 close to the support plate 6 abuts against the support plate 6, it is necessary to make the distance between the side of the recessed portion 514 close to the heat exchange plate 2 and the side of the heat exchange plate 2 close to the bottom guard plate 51 slightly smaller than the thickness of the support plate 6 during design.

[0066] In this example embodiment, the thickness of support plate 6 is greater than or equal to 3 mm and less than or equal to 20 mm. For example, the thickness of support plate 6 can be 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm, 7 mm, 7.5 mm, 8 mm, 8.5 mm, 9 mm, 9.5 mm, 10 mm, 10.5 mm, 11 mm, 11.5 mm, 12 mm, 12.5 mm, 13 mm, 13.5 mm, 14 mm, 14.5 mm, 15 mm, 15.5 mm, 16 mm, 16.5 mm, 17 mm, 17.5 mm, 18 mm, 18.5 mm, 19 mm, 19.5 mm, and so on.

[0067] If the thickness of the support plate 6 is too small, the support plate 6 cannot play a role in increasing the strength of the bottom guard plate 51 , and the support plate 6 cannot be fixedly connected to the liquid inlet connector 3 and the liquid outlet connector 4 .

[0068] If the thickness of the support plate 6 is too large, the support plate 6 is too heavy and the energy density of the battery device cannot be guaranteed. In addition, the height of the liquid inlet connector 3 and the liquid outlet connector 4 protruding from the bottom guard plate 51 is too high, which is not conducive to reducing the volume of the battery device.

[0069] The above numerical range not only increases the strength of the bottom guard plate 51, so that the liquid inlet connector 3 and the liquid outlet connector 4 can be fixedly connected to the support plate 6; but also ensures the energy density of the battery device and reduces the volume of the battery device.

[0070] In this example implementation, refer to Figure 2 As shown, the liquid inlet connector 3 is fixedly connected to the bottom protective plate 51 , and the liquid outlet connector 4 is also fixedly connected to the bottom protective plate 51 .

[0071] Specifically, the liquid inlet joint 3 may include a liquid inlet joint body 31 and a first lug 32. The liquid inlet joint body 31 is configured to be in a straight cylindrical shape, and one end of the liquid inlet joint body 31 is connected to the liquid inlet 21 of the heat exchange plate 2. Specifically, one end of the liquid inlet joint body 31 may be welded to the heat exchange plate 2; the liquid inlet joint body 31 sequentially penetrates the third avoidance portion 61 on the support plate 6 and the first avoidance portion 511 on the bottom guard plate 51 and extends out of the bottom guard plate 51.

[0072] The first lug 32 is connected to the liquid inlet joint body 31, specifically, the first lug 32 is connected to the portion of the liquid inlet joint body 31 that extends out of the bottom guard plate 51, so that the first lug 32 is located on the side of the bottom guard plate 51 away from the heat exchange plate 2. Moreover, two first lugs 32 are provided, and the two first lugs 32 are provided on opposite sides of the liquid inlet joint body 31 with the central axis of the liquid inlet joint body 31 as the symmetric axis.

[0073] The first lug 32 is fixedly connected to the bottom guard plate 51. Specifically, a through hole is provided on the first lug 32, a through hole is also provided on the bottom guard plate 51, and a threaded hole is provided on the support plate 6. The fixing bolt 9 passes through the through hole on the first lug 32 and the through hole on the bottom guard plate 51 in sequence and is threadedly matched with the threaded hole on the support plate 6, so that the first lug 32 is fixedly connected to the bottom guard plate 51.

[0074] The liquid outlet joint 4 may include a liquid outlet joint body 41 and a second lug 42. The liquid outlet joint body 41 is configured to be in a straight cylindrical shape, and one end of the liquid outlet joint body 41 is connected to the liquid outlet 22 of the heat exchange plate 2. Specifically, one end of the liquid outlet joint body 41 may be welded to the heat exchange plate 2; the liquid outlet joint body 41 sequentially penetrates the fourth avoidance portion 62 on the support plate 6 and the second avoidance portion 512 on the bottom guard plate 51 to extend out of the bottom guard plate 51.

[0075] The second lug 42 is connected to the liquid outlet joint body 41, specifically, the second lug 42 is connected to the portion of the liquid outlet joint body 41 that extends out of the bottom guard plate 51, so that the second lug 42 is located on the side of the bottom guard plate 51 away from the heat exchange plate 2. Moreover, two second lugs 42 are provided, and the two second lugs 42 are provided on opposite sides of the liquid outlet joint body 41 with the central axis of the liquid outlet joint body 41 as the symmetric axis.

[0076] The second lug 42 is fixedly connected to the bottom guard plate 51. Specifically, a through hole is provided on the second lug 42, a through hole is also provided on the bottom guard plate 51, and a threaded hole is provided on the support plate 6. The fixing bolt 9 passes through the through hole on the second lug 42 and the through hole on the bottom guard plate 51 in sequence and is threadedly matched with the threaded hole on the support plate 6, so that the second lug 42 is fixedly connected to the bottom guard plate 51.

[0077] The liquid inlet connector 3 and the liquid outlet connector 4 are fixedly connected to the bottom guard plate 51 and the support plate 6 by fixing bolts 9, and the support plate 6 is fixed as a whole with the heat exchange plate 2, so that the heat exchange plate 2, the support plate 6, the bottom guard plate 51, the liquid inlet connector 3 and the liquid outlet connector 4 are all fixed as a whole to improve the structural stability of the battery device.

[0078] Of course, in some other example embodiments of the present disclosure, the first lug 32 and the bottom guard plate 51 may be fixedly connected by welding, that is, a welding connection portion is provided between the first lug 32 and the bottom guard plate 51, and the first lug 32 and the bottom guard plate 51 are fixedly connected by the welding connection portion; similarly, the second lug 42 and the bottom guard plate 51 may be fixedly connected by welding, that is, a welding connection portion is provided between the second lug 42 and the bottom guard plate 51, and the second lug 42 and the bottom guard plate 51 are fixedly connected by the welding connection portion.

[0079] In addition, when only the liquid inlet joint 3 is arranged on the side of the heat exchange plate 2 facing away from the battery group 1, only the liquid inlet joint 3 is fixedly connected to the bottom guard plate 51, and the liquid outlet joint 4 is not fixedly connected to the bottom guard plate 51; when only the liquid outlet joint 4 is arranged on the side of the heat exchange plate 2 facing away from the battery group 1, only the liquid outlet joint 4 is fixedly connected to the bottom guard plate 51, and the liquid inlet joint 3 is not fixedly connected to the bottom guard plate 51.

[0080] In this example implementation, refer to Figure 2 As shown, the battery device may further include a first sealing ring 71 and a second sealing ring 72. When the battery device includes a support plate 6 disposed between the bottom guard plate 51 and the heat exchange plate 2, the first sealing ring 71 is disposed between the liquid inlet joint body 31 and the support plate 6. The first sealing ring 71 can seal the liquid inlet joint body 31 and the support plate 6 to prevent the heat exchange medium from flowing from the liquid inlet 21 to the liquid inlet joint body 31 and the support plate 6 and leaking. The second sealing ring 72 is disposed between the liquid outlet joint body 41 and the support plate 6. The second sealing ring 72 can seal the liquid outlet joint body 41 and the support plate 6 to prevent the heat exchange medium from flowing from the liquid outlet 22 to the liquid outlet joint body 41 and the support plate 6 and leaking.

[0081] Of course, when the liquid inlet joint 3 is only arranged on the side of the heat exchange plate 2 away from the battery group 1, only the first sealing ring 71 can be set between the liquid inlet joint body 31 and the support plate 6; when the liquid outlet joint 4 is only arranged on the side of the heat exchange plate 2 away from the battery group 1, only the second sealing ring 72 can be set between the liquid outlet joint body 41 and the support plate 6.

[0082] The "parallel" and "perpendicular" mentioned in this application can not only be completely parallel or perpendicular, but also can have a certain error; for example, if the angle between the two is greater than or equal to 0° and less than or equal to 5°, the two are considered to be parallel to each other; if the angle between the two is greater than or equal to 85° and less than or equal to 95°, the two are considered to be perpendicular to each other.

[0083] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A battery device, characterized in that: include: A heat exchange plate, wherein a heat exchange channel is arranged in the heat exchange plate; A battery pack is arranged on one side of the heat exchange plate; a liquid inlet joint and a liquid outlet joint, at least one of which is disposed on a side of the heat exchange plate away from the battery pack, and an orthographic projection of at least one of which on the heat exchange plate at least partially overlaps with the heat exchange plate; the liquid inlet joint is connected to the heat exchange channel, and the liquid outlet joint is connected to the heat exchange channel; A bottom guard plate is arranged on the side of the heat exchange plate away from the battery pack, and a first avoidance portion and / or a second avoidance portion is arranged on the bottom guard plate; the liquid inlet joint passes through the first avoidance portion, and / or the liquid outlet joint passes through the second avoidance portion; a protrusion protruding toward the side away from the heat exchange plate is arranged on the bottom guard plate, and a recessed portion recessed toward the side of the heat exchange plate is arranged on the protrusion, and the recessed depth of the recessed portion is less than the protruding height of the protruding portion, so that a gap is also arranged between the recessed portion and the heat exchange plate, and at least a portion of the liquid inlet joint and / or at least a portion of the liquid outlet joint is arranged in the recessed portion.

2. The battery device according to claim 1, characterized in that: The orthographic projection of the liquid inlet joint on the heat exchange plate is located inside the heat exchange plate, and the orthographic projection of the liquid outlet joint on the heat exchange plate is located inside the heat exchange plate.

3. The battery device according to claim 1, characterized in that: The recessed portion is arranged at a corner of the protruding portion so that the protruding portion is not arranged on both sides of the recessed portion; or, the recessed portion is arranged at an edge of the protruding portion so that the protruding portion is not arranged on one side of the recessed portion.

4. The battery device according to claim 1, characterized in that: The liquid inlet joint and the liquid outlet joint are arranged in the same recessed portion.

5. The battery device according to any one of claims 3 to 4, characterized in that: The battery device further comprises: A support plate is arranged between the bottom guard plate and the heat exchange plate, and a third avoidance portion and / or a fourth avoidance portion is arranged on the support plate; the liquid inlet joint passes through the third avoidance portion, and / or the liquid outlet joint passes through the fourth avoidance portion, and the liquid inlet joint and / or the liquid outlet joint are fixedly connected to the support plate.

6. The battery device according to claim 5, characterized in that: When a protrusion protruding toward a side away from the heat exchange plate is provided on the bottom guard plate and a depression recessed toward a side of the heat exchange plate is provided on the protrusion, the support plate is only located between the depression and the heat exchange plate.

7. The battery device according to claim 5, characterized in that: The support plate is fixedly connected to the bottom guard plate and / or the heat exchange plate.

8. The battery device according to claim 5, characterized in that: A surface of the support plate close to the heat exchange plate is fixedly connected to the heat exchange plate, and a surface of the bottom guard plate close to the support plate abuts against the support plate.

9. The battery device according to claim 5, characterized in that: The thickness of the support plate is greater than or equal to 3 mm and less than or equal to 20 mm.

10. The battery device according to any one of claims 3 to 4, characterized in that: The liquid inlet joint is fixedly connected to the bottom guard plate, and / or the liquid outlet joint is fixedly connected to the bottom guard plate.

11. The battery device according to claim 10, characterized in that: The liquid inlet connector comprises: A liquid inlet joint body connected to the heat exchange flow channel; A first lug connected to the liquid inlet joint body and located at a side of the bottom guard plate away from the heat exchange plate, the first lug being fixedly connected to the bottom guard plate; The liquid outlet connector comprises: A liquid outlet joint body connected to the heat exchange flow channel; The second lug is connected to the liquid outlet joint body and is located on a side of the bottom guard plate away from the heat exchange plate. The second lug is fixedly connected to the bottom guard plate.

12. The battery device according to claim 11, characterized in that: The battery device also includes a first sealing ring and / or a second sealing ring. When the battery device includes a support plate arranged between the bottom guard plate and the heat exchange plate, the first sealing ring is arranged between the liquid inlet joint body and the support plate, and / or the second sealing ring is arranged between the liquid outlet joint body and the support plate.

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