Battery pack

Abstract

The utility model provides a battery pack which comprises a first module and a second module, the first module comprises a plurality of first battery monomers which are stacked along a first direction and / or a second direction in a horizontal plane, the first battery monomers are provided with first anti-explosion valves, the first anti-explosion valves are formed at the bottoms of the first battery monomers, and the first direction intersects with the second direction; the second module is arranged on the upper side of the first module in a stacked mode, the second module comprises a plurality of second single batteries which are arranged in a stacked mode in the first direction and / or the second direction, second anti-explosion valves are arranged on the second single batteries, and the second anti-explosion valves are formed on the tops of the second single batteries. According to the battery pack disclosed by the utility model, the first anti-explosion valve is arranged at the bottom of the first battery monomer, and the second anti-explosion valve is arranged at the top of the second battery monomer, so that the problem that the first module and the second module influence each other during thermal runaway can be solved, and the use safety of the first module and the second module can be further improved; and the thermal safety performance of the battery pack is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pack assembly manufacturing, in particular to a battery pack. Background Art

[0002] In the existing battery pack, when two battery modules are installed, when a battery cell thermally runs away, the explosion-proof valve of the battery cell will spray the eruption material onto the adjacent battery module, which will further aggravate the thermal runaway in the battery pack and is not conducive to improving the thermal safety performance of the battery pack. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a side plate of a battery pack, which can improve the thermal safety performance of the battery pack.

[0004] According to an embodiment of the utility model, the battery pack includes: a first module, the first module includes a plurality of first battery cells stacked along a first direction and / or a second direction in a horizontal plane, the first battery cells are provided with a first explosion-proof valve, the first explosion-proof valve is formed at the bottom of the first battery cells, and the first direction intersects with the second direction; a second module, the second module is stacked on the upper side of the first module, the second module includes a plurality of second battery cells stacked along the first direction and / or the second direction, the second battery cells are provided with a second explosion-proof valve, and the second explosion-proof valve is formed at the top of the second battery cells.

[0005] According to the battery pack of the present invention, the first explosion-proof valve is arranged at the bottom of the first battery cell and the second explosion-proof valve is arranged at the top of the second battery cell, so as to solve the problem of mutual influence between the first module and the second module during thermal runaway, thereby improving the safety of use of the first module and the second module and improving the thermal safety performance of the battery pack.

[0006] According to some embodiments of the present invention, the battery pack includes: a cold plate, which is arranged between the first module and the second module to exchange heat with the first module and the second module.

[0007] According to some optional embodiments of the present invention, a first thermally conductive adhesive layer is filled between the first module and the lower surface of the cold plate, and / or a second thermally conductive adhesive layer is filled between the second module and the upper surface of the cold plate.

[0008] According to some embodiments of the utility model, the battery pack further includes: a crossbeam, wherein there are two crossbeams and they are respectively arranged on both sides of the first module in the first direction, and the two ends of the first module are respectively fixedly connected to the two crossbeams; and a bracket, wherein there are two brackets, the two brackets are respectively connected to the two crossbeams and are arranged on the upper side of the crossbeams, and the two ends of the second module in the first direction are respectively connected to the two brackets.

[0009] According to some optional embodiments of the utility model, the crossbeam includes: a main body and a flange, the main body is vertically arranged and extends along the second direction, the flange is connected to the lower end of the main body, and the flange is horizontally arranged and extends along the first direction toward the main body away from the first module.

[0010] According to some embodiments of the utility model, connecting parts are provided at both ends of the cold plate, the connecting parts are respectively overlapped on the upper ends of the two beams, connecting holes are formed on the connecting parts, and the connecting parts are fixedly connected to the beams by fasteners passing through the connecting holes.

[0011] According to some embodiments of the present invention, the crossbeam and / or the bracket are fixedly connected to the box body of the battery pack via fasteners, and the lower surface of the first module is adhesively connected to the box body.

[0012] According to some embodiments of the utility model, the bracket includes: a first plate and a second plate, the first plate is arranged vertically, the second plate is connected to the lower end of the first plate, the second plate is arranged horizontally and extends along the first direction toward the first plate away from the second module, and the end of the second plate away from the first plate is connected to the upper end of the beam.

[0013] According to some embodiments of the present invention, the battery pack further includes: a plurality of pressure plates, the plurality of pressure plates are arranged at intervals along the second direction, both ends of the pressure plates are connected to the bracket, and the second explosion-proof valve is located between adjacent pressure plates.

[0014] According to some embodiments of the utility model, the battery pack also includes: a mica board, wherein the mica board is arranged between two adjacent pressure plates, and a structural weak area is provided on the mica board, and the structural weak area is directly opposite to the second explosion-proof valve in the up and down direction.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of a battery pack according to the utility model;

[0017] Figure 2 yes Figure 1 An exploded view of the battery pack shown in;

[0018] Figure 3 yes Figure 2 A schematic diagram of the first module shown in ;

[0019] Figure 4 yes Figure 2 A schematic diagram of the second module shown in ;

[0020] Figure 5 yes Figure 2 Schematic diagram of the cold plate shown in;

[0021] Figure 6 yes Figure 2 A schematic diagram of the beam shown in ;

[0022] Figure 7 yes Figure 2 Schematic diagram of the bracket shown in;

[0023] Figure 8 yes Figure 2 A schematic diagram of the pressure plate shown in ;

[0024] Fig. 9 yes Figure 2 Schematic diagram of the mica board shown in .

[0025] Reference numerals:

[0026] 100. Battery pack;

[0027] 10. The first module;

[0028] 20. Second module; 21. Second explosion-proof valve;

[0029] 30. cold plate; 31. connecting portion; 311. connecting hole;

[0030] 40. crossbeam; 41. body; 42. flange;

[0031] 50. bracket; 51. first plate; 52. second plate;

[0032] 60. Press plate;

[0033] 70. Mica board; 71. Structural weak area. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0035] Please refer to the following Figure 1-Figure 9 A battery pack 100 according to an embodiment of the present invention is described.

[0036] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 According to the battery pack 100 of the present utility model, the battery pack 100 includes: a first module 10 and a second module 20. Specifically, the first module 10 includes a first direction in a horizontal plane (such as Figure 2 left and right directions as shown) and / or a second direction (as shown Figure 2 A plurality of first battery cells are stacked and arranged in a front-to-back direction (as shown in the figure), and a first explosion-proof valve (not shown in the figure) is provided on the first battery cell. The first explosion-proof valve is formed at the bottom of the first battery cell, and the first direction intersects with the second direction; the second module 20 is stacked and arranged on the upper side of the first module 10 (as shown in the figure Figure 2 The second module 20 includes a plurality of second battery cells stacked in the first direction and / or the second direction, and the second battery cells are provided with a second explosion-proof valve 21, which is formed at the top of the second battery cells (such as Figure 2 The top of the second battery cell is shown).

[0037] For example, Figure 2 , Figure 3 and Figure 4 As shown, the first module 10 includes a plurality of first battery cells stacked in the left-right direction, a first explosion-proof valve is formed at the bottom of the first battery cell, the second module 20 is disposed on the upper side of the first module 10, the second module 20 includes a plurality of second battery cells stacked in the left-right direction, and a second explosion-proof valve 21 is formed at the top of the second battery cell.

[0038] In the battery pack 100 of the present invention, the first explosion-proof valve is arranged at the bottom of the first battery cell and the second explosion-proof valve 21 is arranged at the top of the second battery cell, so that the pressure relief direction of the first explosion-proof valve is toward the direction away from the second explosion-proof valve 21 to release pressure outwardly, and the pressure relief direction of the second explosion-proof valve 21 is toward the direction away from the first explosion-proof valve to release pressure outwardly. When the battery cell is in thermal runaway, the first explosion-proof valve of the first battery cell releases pressure outward from the bottom of the first battery cell, and the ejection of the first explosion-proof valve will not affect the second battery cell. At the same time, the second explosion-proof valve 21 of the second battery cell releases pressure outward from the top of the second battery cell, and the ejection of the second explosion-proof valve 21 will not affect the first battery cell, thereby solving the problem of mutual influence between the first module 10 and the second module 20 when thermal runaway occurs, thereby improving the use safety of the first module 10 and the second module 20, and improving the thermal safety performance of the battery pack 100.

[0039] According to the battery pack 100 of the embodiment of the present invention, the first explosion-proof valve is arranged at the bottom of the first battery cell and the second explosion-proof valve 21 is arranged at the top of the second battery cell, so as to solve the problem of mutual influence between the first module 10 and the second module 20 during thermal runaway, thereby improving the safety of use of the first module 10 and the second module 20 and improving the thermal safety performance of the battery pack 100.

[0040] According to some embodiments of the present invention, referring to Figure 2 and Figure 5 The battery pack 100 includes: a cold plate 30, which is disposed between the first module 10 and the second module 20 to exchange heat with the first module 10 and the second module 20. Thus, the cold plate 30 can cool down the first module 10 and the second module 20 at the same time, which can effectively prevent the first module 10 and the second module 20 from thermal runaway. At the same time, only one cold plate 30 is required to cool down the first module 10 and the second module 20, thereby reducing the production cost of the battery pack 100.

[0041] According to some optional embodiments of the present invention, referring to Figure 2 and Figure 5 , the first module 10 and the lower surface of the cold plate 30 (such as Figure 5 The first heat conductive adhesive layer is filled between the second module 20 and the upper surface of the cold plate 30 (as shown in FIG. Figure 5 The upper surface of the cold plate 30 shown in the figure) is filled with a second thermal conductive adhesive layer. As a result, the first thermal conductive adhesive can quickly transfer the heat generated by the first module 10 to the cold plate 30, thereby avoiding thermal runaway of the first module 10 and improving the cooling efficiency of the cold plate 30 on the first module 10. At the same time, the second thermal conductive adhesive can quickly transfer the heat generated by the second module 20 to the cold plate 30, thereby avoiding thermal runaway of the second module 20 and improving the cooling efficiency of the cold plate 30 on the second module 20.

[0042] According to some optional embodiments of the present invention, referring to Figure 2 , Figure 6 and Figure 7 The battery pack 100 further includes: a beam 40 and a bracket 50. The beams 40 are two and are respectively arranged on the first module 10 in the first direction (such as Figure 2 The left and right directions shown) on both sides (such as Figure 2 The left and right sides of the first module 10 shown in FIG. Figure 2 The left and right ends of the first module 10 shown in the figure are respectively fixedly connected to the two beams 40; there are two brackets 50, which are respectively connected to the two beams 40 and are arranged on the upper side of the beams 40 (such as Figure 2 The upper side of the beam 40 shown in FIG. 1 ), the two ends of the second module 20 in the first direction (such as Figure 2 The left end and the right end of the second module 20 are respectively connected to two brackets 50.

[0043] In this way, both ends of the first module 10 are fixed on two cross beams 40, which can prevent the first module 10 from shaking, thereby making the first module 10 stably fixed in the battery pack 100, and both ends of the second module 20 are fixed on two brackets 50, which can prevent the second module 20 from shaking, thereby making the second module 20 stably fixed in the battery pack 100. At the same time, the brackets 50 are fixedly connected to the cross beams 40, so that the first module 10 and the second module 20 are fixedly connected by fixing the brackets 50 and the cross beams 40, thereby effectively preventing the first module 10 and the second module 20 from shaking in the battery pack 100.

[0044] For example, Figure 2 , Figure 6 and Figure 7 As shown, two cross beams 40 are arranged on the left and right sides of the first module 10, and the left and right ends of the first module 10 are respectively fixedly connected to the corresponding cross beams 40, and two brackets 50 are arranged on the upper sides of the two cross beams 40 and connected, and the two brackets 50 are arranged on the left and right sides of the second module 20, and the left and right ends of the second module 20 are respectively fixedly connected to the corresponding brackets 50. Preferably, the cross beam 40 is welded to the box body, so that the connection strength between the cross beam 40 and the box body can be ensured, and the bracket 50 is screwed to the cross beam 40, and the screw connection is simple and low-cost.

[0045] According to some optional embodiments of the present invention, referring to Figure 2 and Figure 6 The cross beam 40 includes: a body 41 and a flange 42, the body 41 is arranged vertically and along the second direction (such as Figure 2 The flange 42 is connected to the lower end of the body 41 (as shown in the front and rear direction). Figure 2 The flange 42 is horizontally arranged and extends in a first direction (such as Figure 2 The left and right directions shown in the figure extend toward the body 41 away from the first module 10. Thus, the body 41 can protect both sides of the first module 10, effectively prevent other objects from contacting the first module 10, and further effectively protect the first module 10. Furthermore, the flange 42 extends away from the first module 10, which can facilitate the connection of the flange 42 with other structures. At the same time, the flange 42 does not affect the layout space of the first module 10, so that the layout of the first module 10 can be facilitated.

[0046] According to some embodiments of the present invention, referring to Figure 2 , Figure 5 and Figure 6 , both ends of the cold plate 30 (such as Figure 5 The left and right ends of the cold plate 30 shown in FIG. 1 are provided with connecting parts 31, and the connecting parts 31 are respectively overlapped on the upper ends of the two cross beams 40 (such as Figure 6 The upper end of the cross beam 40 shown in the figure), a connection hole 311 is formed on the connection part 31, and the connection part 31 is fixedly connected to the cross beam 40 by a fastener passing through the connection hole 311. Therefore, the connection part 31 can facilitate the fixation of the cold plate 30 and the cross beam 40, thereby saving the fixation time and improving the efficiency. At the same time, the fastener can pass through the connection hole 311 to realize the fixation of the cold plate 30 and the cross beam 40. This connection form has a simple structure, low cost, and is convenient for mass use.

[0047] For example, Figure 2 , Figure 5 and Figure 6 As shown, the left and right ends of the cold plate 30 are provided with connecting parts 31, the connecting part 31 at the left end is overlapped with the upper end of the left crossbeam 40, and the connecting part 31 at the right end is overlapped with the upper end of the right crossbeam 40, and a connecting hole 311 is formed on the connecting part 31, and the connecting hole 311 penetrates the connecting part 31 in the up-down direction, and the fastener passes through the connecting hole 311 to fix the cold plate 30 and the crossbeam 40. Preferably, the fastener is a bolt, which has low cost and is convenient for mass use.

[0048] According to some embodiments of the present invention, referring to Figure 2 , Figure 6 and Figure 7 The crossbeam 40 and / or the bracket 50 are fixedly connected to the box of the battery pack 100 by fasteners, and the lower surface of the first module 10 (such as Figure 2The lower surface of the first module 10 shown in the figure is bonded to the box. Thus, the cross beam 40 and / or the bracket 50 can be effectively prevented from shaking relative to the box, thereby effectively preventing the first module 10 and / or the second module 20 from shaking relative to the box. At the same time, the bonding connection between the first module 10 and the box can again prevent the first module 10 from shaking relative to the box.

[0049] For example, Figure 2 , Figure 6 and Figure 7 As shown, the flange 42 of the cross beam 40 is connected to the box body by a fastener, which can facilitate the fixation of the cross beam 40 and the box body. Preferably, the fastener is a bolt, which is low in cost and convenient for batch use. At the same time, the lower surface of the first module 10 and the box body are filled with structural glue, so that the first module 10 can be bonded to the box body.

[0050] According to some optional embodiments of the present invention, referring to Figure 2 and Figure 7 The bracket 50 includes a first plate 51 and a second plate 52, wherein the first plate 51 is arranged vertically and the second plate 52 is connected to the lower end of the first plate 51 (such as Figure 7 The lower end of the first plate 51 shown in FIG. 1 ), the second plate 52 is arranged horizontally and along a first direction (such as Figure 7 The second plate 52 extends in a direction away from the second module 20 toward the first plate 51 (in the left-right direction shown in the figure), and one end of the second plate 52 away from the first plate 51 is connected to the upper end of the beam 40.

[0051] In this way, the first plate 51 can protect both sides of the second module 20, and can effectively prevent other objects from contacting the second module 20, thereby effectively protecting the second module 20. Furthermore, the second plate 52 extends away from the second module 20, which can facilitate the connection between the second plate 52 and the beam 40. At the same time, the flange 42 does not affect the layout space of the second module 20, thereby facilitating the layout of the second module 20.

[0052] According to some embodiments of the present invention, referring to Figure 1 , Figure 2 and Figure 8 The battery pack 100 further includes: a plurality of pressing plates 60, that is, the battery pack 100 further includes two, three or four or more pressing plates 60, and the plurality of pressing plates 60 are arranged along the second direction (such as Figure 1 The front and rear directions shown in FIG. 1 are arranged at intervals, and the two ends of the pressing plate 60 (such as Figure 1 The left and right ends of the pressing plates 60 shown are connected to the bracket 50 , and the second explosion-proof valve 21 is located between adjacent pressing plates 60 .

[0053] In this way, the pressing plate 60 can press the second battery cell in the second module 20, which can effectively prevent the second battery cell from moving. At the same time, the second explosion-proof valve 21 leaks out from between adjacent pressing plates 60, which can ensure normal pressure relief of the second battery cell.

[0054] For example, Figure 1 , Figure 2 and Figure 8 As shown, the pressing plate 60 extends in the left-right direction, and the battery pack 100 includes three pressing plates 60, which are arranged at intervals in the front-back direction, and the second explosion-proof valve 21 is located between adjacent pressing plates 60. Preferably, the pressing plate 60 is bonded to the upper surface of the second module 20, so that the pressing plate 60 and the second module 20 can be tightly connected, thereby ensuring the pressing force of the pressing plate 60 on the battery cell.

[0055] According to some embodiments of the present invention, referring to Figure 1 , Figure 2 and Fig. 9 The battery pack 100 further includes: a mica plate 70, the mica plate 70 is disposed between two adjacent pressure plates 60, and a structural weak area 71 is disposed on the mica plate 70, and the structural weak area 71 is vertically spaced from the second explosion-proof valve 21 (such as Figure 2 Directly facing in the up and down direction shown).

[0056] In this way, when the second battery cell thermal runaway causes the second explosion-proof valve 21 to release pressure and spray out high-temperature objects, the mica board 70 can protect the second module 20, thereby preventing the thermal runaway of the second module 20 from further spreading, and thus effectively protecting the second module 20. At the same time, the thickness of the structural weak area 71 is thinner than that of other positions of the mica board 70, thereby facilitating the second explosion-proof valve 21 to spray out the ejected material from the structural weak area 71, thereby preventing the second battery cell from being unable to spray out the ejected material and causing the second battery cell to explode. Preferably, the mica board 70 is bonded to the second module 20, and the bonding connection is simple in form, while also ensuring the connection strength between the mica board 70 and the second module 20.

[0057] Reference below Figure 1-Figure 9 A battery pack 100 according to an embodiment of the present invention is described.

[0058] According to the battery cell of the embodiment of the utility model, Figure 1 The battery cell includes: a first module 10 , a second module 20 , a cold plate 30 , a crossbeam 40 , a bracket 50 , a pressing plate 60 and a mica plate 70 .

[0059] Specifically, the first module 10 includes a plurality of first battery cells stacked in the left-right direction, a first explosion-proof valve is provided on the bottom of the first battery cell, the second module 20 is stacked on the upper side of the first module 10, the second module 20 includes a plurality of second battery cells stacked in the left-right direction, a second explosion-proof valve 21 is provided on the top of the second battery cell.

[0060] The cold plate 30 is disposed between the first module 10 and the second module 20 . A first thermal conductive adhesive layer is filled between the first module 10 and the lower surface of the cold plate 30 , and a second thermal conductive adhesive layer is filled between the second module 20 and the upper surface of the cold plate 30 .

[0061] Two cross beams 40 are provided and are respectively provided on the left and right sides of the first module 10. The cross beam 40 includes: a body 41 and a flange 42. The body 41 is arranged vertically and extends in the front-back direction. The flange 42 is connected to the lower end of the body 41. The flange 42 is arranged horizontally and extends in the left-right direction toward the body 41 away from the first module 10. There are two brackets 50. The two brackets 50 are provided on the upper side of the cross beam 40. The bracket 50 includes: a first plate 51 and a second plate 52. The first plate 51 is arranged vertically. The second plate 52 is connected to the lower end of the first plate 51. The second plate 52 is arranged horizontally and extends in the left-right direction toward the first plate 51 away from the second module 20. One end of the second plate 52 away from the first plate 51 is connected to the upper end of the cross beam 40.

[0062] The pressing plate 60 extends in the left-right direction, and there are three pressing plates 60 arranged in total. The three pressing plates 60 are arranged at intervals in the front-back direction, and the left and right ends of the pressing plates 60 are connected to the upper end of the bracket 50. The mica plate 70 is arranged between two adjacent pressing plates 60, and a structural weak area 71 is provided on the mica plate 70, and the structural weak area 71 is directly opposite to the second explosion-proof valve 21 in the up-down direction.

[0063] When assembling the battery pack 100, firstly stack a plurality of first battery cells in the left-right direction, and note that the first explosion-proof valve is at the bottom of the first battery cell. Then, a crossbeam 40 is respectively arranged on the left and right sides of the first battery cell. The body 41 of the crossbeam 40 is connected to the first module 10, and the flange 42 of the crossbeam 40 is connected to the box body. Then, the liquid cooling plate 30 is installed on the upper side of the first module 10, and the left and right ends of the cold plate 30 are respectively connected to the upper ends of the corresponding crossbeams 40. Then, a plurality of second battery cells are stacked in the left-right direction, and note that the second explosion-proof valve 21 is at the top of the second battery cell. Then, A bracket 50 is respectively arranged on the left and right sides of the body, the first plate 51 of the bracket 50 is connected to the second module 20, and the second plate 52 of the bracket 50 is connected to the upper end of the main body 41 of the beam 40. Then, the pressing plate 60 is arranged on the upper side of the second module 20, and the two ends of the pressing plate 60 are connected to the upper end of the bracket 50. Then, the mica plate 70 is installed between adjacent pressing plates 60. It should be noted that the structural weak area 71 is opposite to the second explosion-proof valve 21 in the upper and lower directions. Finally, the first module 10 and the second module 20 are installed in the box. At the same time, structural adhesive is coated between the lower surface of the first module 10 and the box. At this time, the assembly of the battery pack 100 is completed.

[0064] In the battery pack 100 of the present invention, the first explosion-proof valve is arranged at the bottom of the first battery cell and the second explosion-proof valve 21 is arranged at the top of the second battery cell, thereby solving the problem of mutual influence between the first module 10 and the second module 20 during thermal runaway, thereby improving the safety of use of the first module 10 and the second module 20 and improving the thermal safety performance of the battery pack 100.

[0065] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0066] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0067] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0068] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0069] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that: include: A first module, the first module comprising a plurality of first battery cells stacked and arranged along a first direction and / or a second direction in a horizontal plane, the first battery cells being provided with a first explosion-proof valve, the first explosion-proof valve being formed at the bottom of the first battery cells, and the first direction intersecting with the second direction; The second module is stacked on the upper side of the first module, the second module includes a plurality of second battery cells stacked along the first direction and / or the second direction, the second battery cells are provided with a second explosion-proof valve, and the second explosion-proof valve is formed on the top of the second battery cells.

2. The battery pack according to claim 1, characterized in that: include: A cold plate is disposed between the first module and the second module to exchange heat with the first module and the second module.

3. The battery pack according to claim 2, characterized in that: A first thermally conductive adhesive layer is filled between the first module and the lower surface of the cold plate, and / or a second thermally conductive adhesive layer is filled between the second module and the upper surface of the cold plate.

4. The battery pack according to claim 2, characterized in that: Also includes: Cross beams, wherein there are two cross beams and the cross beams are respectively arranged on both sides of the first module in the first direction, and the two ends of the first module are respectively fixedly connected to the two cross beams; The number of the brackets is two, the two brackets are respectively connected to the two beams and are arranged on the upper side of the beams, and the two ends of the second module in the first direction are respectively connected to the two brackets.

5. The battery pack according to claim 4, characterized in that: The crossbeam comprises: a body and a flange, wherein the body is arranged vertically and extends along the second direction, the flange is connected to the lower end of the body, and the flange is arranged horizontally and extends along the first direction toward the body away from the first module.

6. The battery pack according to claim 4 or 5, characterized in that: Connecting parts are provided at both ends of the cold plate, and the connecting parts are overlapped on the upper ends of the two beams respectively. Connecting holes are formed on the connecting parts, and the connecting parts are fixedly connected to the beams through fasteners passing through the connecting holes.

7. The battery pack according to claim 4 or 5, characterized in that: The crossbeam and / or the bracket are fixedly connected to the box body of the battery pack via fasteners, and the lower surface of the first module is adhesively connected to the box body.

8. The battery pack according to claim 4 or 5, characterized in that: The bracket includes: a first plate and a second plate, the first plate is arranged vertically, the second plate is connected to the lower end of the first plate, the second plate is arranged horizontally and extends along the first direction toward the first plate away from the second module, and one end of the second plate away from the first plate is connected to the upper end of the beam.

9. The battery pack according to claim 4 or 5, characterized in that: Also includes: A plurality of pressing plates are arranged at intervals along the second direction, two ends of the pressing plates are connected to the bracket, and the second explosion-proof valve is located between adjacent pressing plates.

10. The battery pack according to claim 9, characterized in that: Also includes: A mica plate, wherein the mica plate is arranged between two adjacent pressure plates, and a structurally weak area is arranged on the mica plate, and the structurally weak area is directly opposite to the second explosion-proof valve in the up and down direction.

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