Double-layer battery module and battery

Abstract

The utility model relates to a double-layer battery module and a battery. The double-layer battery module comprises a first battery module, a second battery module and an interlayer heat exchange plate, and the first battery module and the second battery module are arranged on the two opposite sides of the interlayer heat exchange plate in the first direction; and the surface of the first battery module, which is opposite to the own pole, and the surface of the second battery module, which is opposite to the own pole, are in contact with the interlayer heat exchange plate. According to the double-layer battery module and the battery provided by the invention, the heat exchange effect can be improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and specifically to a double-layer battery module and a battery. Background Art

[0002] With the development of battery technology, batteries have been widely used in various fields due to their environmental advantages, long battery life, and high cost-effectiveness. To improve battery energy density and space utilization, a double-layer battery module is typically arranged within the battery casing. However, for double-layer battery modules, heat exchange is more difficult when the double-layer battery module is far away from the heat exchange structure of the casing or the heat exchange structure of the double-layer battery module itself. As the operating time increases, the performance of the double-layer battery module is affected. Utility Model Content

[0003] Based on this, it is necessary to provide a double-layer battery module and battery that can improve the heat exchange effect to address the above problems.

[0004] A double-layer battery module includes a first battery module, a second battery module and an interlayer heat exchange plate, wherein the first battery module and the second battery module are arranged on opposite sides of the interlayer heat exchange plate along a first direction; wherein the surface of the first battery module facing away from its own pole and the surface of the second battery module facing away from its own pole are both in contact with the interlayer heat exchange plate.

[0005] In some embodiments, the double-layer battery module includes a module box, the interlayer heat exchange plate is located in the module box, and the internal space of the module box is divided into a first space and a second space, the first battery module is installed in the first space, and the second battery module is installed in the second space.

[0006] In some embodiments, the module box includes a first cover plate, a second cover plate, a first end plate, a second end plate, a third end plate, a fourth end plate, a first side plate, and a second side plate;

[0007] The first cover plate and the second cover plate are arranged at intervals along the first direction, the first end plate and the second end plate are located on one side of the mezzanine heat exchange plate arranged along the first direction, the third end plate and the fourth end plate are located on the other side of the mezzanine heat exchange plate arranged along the first direction, and the first end plate and the second end plate, as well as the third end plate and the fourth end plate are arranged at intervals along a second direction intersecting the first direction, the first side plate and the second side plate are arranged at intervals along a third direction intersecting both the first direction and the second direction, and the first side plate and the second side plate are connected to the first end plate, the second end plate, the third end plate, the fourth end plate and the mezzanine heat exchange plate;

[0008] The first side plate, the second side plate, the first end plate, the second end plate and the first cover plate enclose the first space, and the first side plate, the second side plate, the third end plate, the fourth end plate and the second cover plate enclose the second space.

[0009] In some embodiments, a first guide slide groove and a second guide slide groove are respectively formed at one end of the first side plate and the second side plate arranged along the first direction, and a third guide slide groove and a fourth guide slide groove are respectively formed at the other end of the first side plate and the second side plate arranged along the first direction;

[0010] The two ends of the first cover plate that are oppositely arranged along the third direction are respectively installed in the first guide slide groove and the second guide slide groove, and the two ends of the second cover plate that are oppositely arranged along the third direction are respectively installed in the third guide slide groove and the fourth guide slide groove.

[0011] In some embodiments, the two surfaces of the interlayer heat exchange plate spaced apart along the third direction are respectively constructed with a first card slot and a second card slot, the first side plate is constructed with a first protrusion, and the second side plate is constructed with a second protrusion, the first protrusion is limitedly engaged with the first card slot, and the second protrusion is limitedly engaged with the second card slot.

[0012] In some embodiments, the module box further includes a first corrugated plate and a second corrugated plate, wherein the first corrugated plate and the second corrugated plate are respectively installed on two sides of the first side plate and the second side plate that are away from each other in the third direction.

[0013] In some embodiments, the gap between the first corrugated plate and the first side plate, and the gap between the second corrugated plate and the second side plate are filled with thermal insulation material.

[0014] In some embodiments, a plurality of first boss groups are protruding from a side of the first corrugated plate facing away from the first side plate, all of the first boss groups are spaced apart along the second direction, all of the first bosses in the same first boss group are spaced apart along the first direction, and first through holes are formed on the first bosses;

[0015] A plurality of second boss groups are protruding from a side of the second corrugated plate facing away from the second side plate, all of the second boss groups are spaced apart along the second direction, all of the second bosses in the same second boss group are spaced apart along the first direction, and second through holes are formed on the second bosses;

[0016] The module box also includes multiple first fasteners and multiple second fasteners, the first fasteners correspond one-to-one to the first boss groups, and the first fasteners are inserted into all the first through holes in the corresponding first boss groups, and the second fasteners correspond one-to-one to the second boss groups, and the second fasteners are inserted into all the second through holes in the corresponding second boss groups.

[0017] In some embodiments, the module box further includes a first conduit and a second conduit, the first through holes of each adjacent two first bosses in the same first boss group are connected through the first conduit, and the first fastener is passed through all the first conduits connected to the first through holes in the corresponding first boss group; the second through holes of each adjacent two second bosses in the same second boss group are connected through the second conduit, and the second fastener is passed through all the second conduits connected to the second through holes in the corresponding second boss group.

[0018] In some embodiments, the double-layer battery module further includes a transfer bar and an insulating mounting component, the transfer bar is mounted on the sandwich heat exchange plate through the insulating mounting component, and the transfer bar is used to connect the first battery module and the second battery module in series.

[0019] A battery comprises a double-layer battery module as described in any one of the above embodiments.

[0020] The above-mentioned double-layer battery module and battery are designed so that the surface of the first battery module facing away from its own pole and the surface of the second battery module facing away from its own pole are both in contact with the interlayer heat exchange plate. Therefore, the first battery module and the second battery module can use the interlayer heat exchange plate for centralized heat exchange. The heat exchange method of the first battery module and the second battery module is simple, the heat exchange effect is good and the heat exchange is balanced, which is conducive to maintaining the performance of the double-layer battery module and extending the service life of the double-layer battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a double-layer battery module in one embodiment of the present application;

[0022] Figure 2 for Figure 1 A schematic diagram of the structure of a double-layer battery module in which the first cover plate and the second cover plate partially slide out or partially slide in;

[0023] Figure 3 for Figure 2 An exploded view of the double-layer battery module shown with the first and second covers removed;

[0024] Figure 4 for Figure 3An enlarged schematic diagram of a local structure A in the double-layer battery module shown;

[0025] Figure 5 for Figure 3 An enlarged schematic diagram of a local structure B in the double-layer battery module shown;

[0026] Figure 6 for Figure 3 An enlarged schematic diagram of a local structure C in the double-layer battery module shown;

[0027] Figure 7 for Figure 3 An enlarged schematic diagram of a local structure D in the double-layer battery module shown;

[0028] Figure 8 for Figure 1 A rear view of the double-layer battery module is shown;

[0029] Figure 9 for Figure 8 An enlarged schematic diagram of the local structure E in the double-layer battery module shown.

[0030] Figure Number:

[0031] 100. Double-layer battery module;

[0032] 10. Interlayer heat exchange plate; 20. First battery module; 30. Second battery module; 40. Module box; 50. First fastener; 60. Second fastener; 70. Adapter bar; 80. Insulation mounting component; 90. First output bar; 110. Second output bar; 130. First low-voltage output interface; 140. Second low-voltage output interface;

[0033] 11. Liquid inlet interface; 12. Liquid outlet interface; 13. First card slot; 15. First edge;

[0034] 21. First battery cell;

[0035] 31. Second battery cell;

[0036] 41. First cover plate; 42. Second cover plate; 43. First end plate; 431. First end plate body; 432. First end plate flange; 433. Second end plate flange; 44. Second end plate; 441. Second end plate body; 442. Third end plate flange; 443. Fourth end plate flange; 45. Third end plate; 451. Third end plate body; 452. Fifth end plate flange; 453. Sixth end plate flange; 47. First side plate; 471. First guide slide groove; 472. Third guide slide groove; 473. First side plate body; 474. First Side panel flange; 475, second side panel flange; 476, first protrusion; 48, second side panel; 481, second guide slide groove; 482, fourth guide slide groove; 483, second side panel body; 484, third side panel flange; 485, fourth side panel flange; 49, first space; 51, second space; 52, first corrugated plate; 521, first boss group; 521a, first boss; 521b, first through hole; 53, second corrugated tube; 531, second boss; 531a, second through hole; 54, first conduit; 55, second conduit;

[0037] 81. Insulated mounting base; 82. Insulated terminal;

[0038] Z, first direction; X, second direction; Y, third direction. DETAILED DESCRIPTION

[0039] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0040] In the description of the present application, 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 application and simplifying the description, and do not indicate or imply that the device or element referred to 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 application.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0042] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0043] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0044] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0045] Currently, market developments indicate that batteries are increasingly being used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. As battery applications continue to expand, market demand is also growing.

[0046] In order to improve the energy density and space utilization of batteries, double-layer battery modules are usually arranged in the battery box. Generally, there are two forms of heat exchange for double-layer battery modules: the first is to design the bottom plate of the box as a heat exchange plate, and use the bottom battery module in the double-layer battery module to contact the heat exchange plate of the box to achieve heat exchange of the double-layer battery module; the second is to design the double-layer battery module itself with a heat exchange plate, and use the bottom battery module in the double-layer battery module to contact the heat exchange plate of the double-layer battery module to achieve heat exchange of the double-layer battery module. Any of the above heat exchange methods will make it difficult to heat the upper battery module away from the box heat exchange plate or away from the double-layer battery module's own heat exchange plate, which will affect the performance of the double-layer battery module as the operating time increases.

[0047] See also Figure 1 、 Figure 2 and Figure 3 To alleviate the above-mentioned problems, the applicant, after in-depth research, designed a double-layer battery module 100. The double-layer battery module 100 includes a first battery module 20, a second battery module 30, and a sandwich heat exchange plate 10. The first battery module 20 and the second battery module 30 are arranged on opposite sides of the sandwich heat exchange plate 10 along a first direction Z; wherein the surface of the first battery module 20 facing away from its own pole and the surface of the second battery module 30 facing away from its own pole are both in contact with the sandwich heat exchange plate 10.

[0048] by Figure 1 Taking the state of the middle double-layer battery module 100 as an example, the first direction Z is the vertical direction. The first battery module 20 is the upper battery module, and the second battery module 30 is the lower battery module.

[0049] As an example, the first battery module 20 and the second battery module 30 may be one or more. If both the first battery module 20 and the second battery module 30 are multiple, all the first battery modules 20 and all the second battery modules 30 are arranged along the second direction X or the third direction Y, and any two of the first direction Z, the second direction X, and the third direction Y intersect. Figure 1 Taking the state of the middle double-layer battery module 100 as an example, the second direction X is the front-to-back direction, and the third direction Y is the left-to-right direction.

[0050] For ease of description, the following embodiments are described by taking as an example that both the first battery module 20 and the second battery module 30 are one, the first battery module 20 is an upper battery module, and the second battery module 30 is a lower battery module.

[0051] The first battery module 20 includes a plurality of first battery cells 21 arranged and connected in series along the second direction X, and the second battery module 30 includes a plurality of second battery cells 31 arranged and connected in series along the second direction X. Both the first battery cells 21 and the second battery cells 31 have poles, and the surface of the first battery cell 21 facing away from its pole and the surface of the second battery cell 31 facing away from its pole are in contact with the interlayer heat exchange plate 10.

[0052] Specifically, the interlayer heat exchange plate 10 contacts the first battery module 20 and the second battery module 30, and can simultaneously cool or heat the first and second battery modules 20, 30. For example, in the summer, when the battery is started, the interlayer heat exchange plate 10 absorbs heat from the first and second battery modules 20, 30 and cools the first and second battery modules 20, 30. For example, in the winter, when the battery is started, the interlayer heat exchange plate 10 transfers heat to the first and second battery modules 20, 30 and heats the first and second battery modules 20, 30.

[0053] By designing the surfaces of the first battery module 20 facing away from its own poles and the surfaces of the second battery module 30 facing away from its own poles to be in contact with the interlayer heat exchange plate 10, the first and second battery modules 20, 30 can utilize the interlayer heat exchange plate 10 for centralized heat exchange. This provides a simple heat exchange method for the first and second battery modules 20, 30, with effective and balanced heat exchange, which helps maintain the performance of the double-layer battery module 100 and extends the service life of the double-layer battery module 100. Taking cooling as an example, the advantage of locating the interlayer heat exchange plate 10 between the first and second battery modules 20, 30 is that it centrally manages heat dissipation for the first and second battery modules 20, 30, reduces the risk of heat diffusion, and provides excellent cooling effects, thereby improving the performance of the double-layer battery module 100.

[0054] It is worth mentioning that the surface of the first battery module 20 facing away from its own pole and the surface of the second battery module 30 facing away from its own pole are both in contact with the interlayer heat exchange plate 10, ensuring that there is a large effective heat exchange area between the first battery module 20 and the second battery module 30 and the interlayer heat exchange plate 10.

[0055] In some optional embodiments, the interlayer heat exchange plate 10 has an interlayer heat exchange channel therein, and the interlayer heat exchange plate 10 is provided with a liquid inlet port 11 and a liquid outlet port 12 communicating with the interlayer heat exchange channel.

[0056] The interlayer heat exchange channel is used to flow a heat exchange fluid, which exchanges heat with the first battery module 20 and the second battery module 30 to achieve heat exchange between the first battery module 20 and the second battery module 30. As an example, the heat exchange fluid can be water, alcohol, or other fluids with a large specific heat.

[0057] The interlayer heat exchange plate 10 also has a liquid inlet interface 11 and a liquid outlet interface 12, both of which are connected to the interlayer heat exchange channel. The liquid inlet interface 11 refers to an opening for providing entry of the heat exchange fluid, and the liquid outlet interface 12 refers to an opening for providing output of the heat exchange fluid. The heat exchange fluid can circulate in the heat exchange channel through the liquid inlet interface 11 and the liquid outlet interface 12, which is beneficial to improving the heat exchange effect. Taking refrigeration as an example, the heat exchange fluid carries the heat generated by the operation of the first battery module 20 and the second battery module 30 out of the double-layer battery module 100 through heat exchange, thereby achieving a thermal management effect.

[0058] In some optional embodiments, the double-layer battery module 100 includes a module box 40, the interlayer heat exchange plate 10 is located in the module box 40, and the internal space of the module box 40 is divided into a first space 49 and a second space 51, the first battery module 20 is installed in the first space 49, and the second battery module 30 is installed in the second space 51.

[0059] Typically, the module box 40 is generally made of insulating materials. The module box 40 is used to provide insulation and protection functions for the first battery module 20 and the second battery module 30 to reduce the safety risks caused by leakage and external impact to the first battery module 20 and the second battery module 30.

[0060] Please refer again Figures 1 to 3 , and also see Figure 4 , further to the figure, in some optional embodiments, the module box 40 includes a first cover plate 41, a second cover plate 42, a first end plate 43, a second end plate 44, a third end plate 45, a fourth end plate, a first side plate 47 and a second side plate 48; the first cover plate 41 and the second cover plate 42 are arranged at intervals along the first direction Z, the first end plate 43 and the second end plate 44 are located on one side of the sandwich heat exchange plate 10 arranged along the first direction Z, the third end plate 45 and the fourth end plate are located on the other side of the sandwich heat exchange plate 10 arranged along the first direction Z, and the first end plate 43 and the second end plate 44, as well as the third end plate 45 and the fourth end plate are all arranged along the second direction intersecting the first direction Z. The first side plates 47 and the second side plates 48 are arranged at intervals in the direction X, and the first side plates 47 and the second side plates 48 are arranged at intervals along the third direction Y intersecting both the first direction Z and the second direction X, and the first side plates 47 and the second side plates 48 are connected to the first end plate 43, the second end plate 44, the third end plate 45, the fourth end plate and the interlayer heat exchange plate 10; the first side plate 47, the second side plate 48, the first end plate 43, the second end plate 44 and the first cover plate 41 enclose a first space 49 for accommodating the first battery module 20, and the first side plate 47, the second side plate 48, the third end plate 45, the fourth end plate and the second cover plate 42 enclose a second space 51 for accommodating the second battery module 30.

[0061] The first cover plate 41 and the second cover plate 42 have the same structure, the first end plate 43 and the second end plate 44 have the same structure, the third end plate 45 and the fourth end plate have the same structure, and the first side plate 47 and the second side plate 48 have the same structure.

[0062] The first cover plate 41 cooperates with the sandwich heat exchange plate 10 to position the first battery module 20 along the first direction Z. The second cover plate 42 cooperates with the sandwich heat exchange plate 10 to position the second battery module 30 along the first direction Z. The first end plate 43 and the second end plate 44 position the first battery module 20 along the second direction X. The third end plate 45 and the fourth end plate position the second battery module 30 along the second direction X. The first side plate 47 and the second side plate 48 position the first battery module 20 and the second battery module 30 along the third direction Y. Furthermore, the first side plate 47 and the second side plate 48 are connected to the first end plate 43, the second end plate 44, the third end plate 45, the fourth end plate, and the sandwich heat exchange plate 10, and assembled to form the module box 40.

[0063] The first cover plate 41, the second cover plate 42, the first end plate 43, the second end plate 44, the third end plate 45, the fourth end plate, the first side plate 47, and the second side plate 48 are assembled to form the module box 40. This prevents foreign matter from contacting the first battery module 20 and the second battery module 30, thereby improving the reliability of the double-layer battery module 100. Furthermore, the structural strength of the double-layer battery module 100 is enhanced. During use, even if the double-layer battery module 100 is subjected to a significant impact, the first battery module 20 and the second battery module 30 within the double-layer battery module 100 are protected and less likely to deform, thereby improving the safety of the double-layer battery module 100.

[0064] Please refer again Figures 1 to 4 , and also see Figure 6 and Figure 7 In some optional embodiments, the first side plate 47 and the second side plate 48 are respectively provided with a first guide slide groove 471 and a second guide slide groove 481 at one end thereof arranged along the first direction Z, and the third guide slide groove 472 and the fourth guide slide groove 482 are respectively provided at the other end thereof arranged along the first direction Z; the two ends of the first cover plate 41 which are relatively arranged along the third direction Y are respectively installed in the first guide slide groove 471 and the second guide slide groove 481, and the two ends of the second cover plate 42 which are relatively arranged along the third direction Y are respectively installed in the third guide slide groove 472 and the fourth guide slide groove 482.

[0065] During actual operation, the first cover plate 41 slides into the first guide slide groove 471 and the second guide slide groove 481 along the second direction X to achieve installation of the first cover plate 41. The first cover plate 41 slides out of the first guide slide groove 471 and the second guide slide groove 481 along the second direction X to achieve removal of the first cover plate 41.

[0066] It is worth mentioning that the second cover plate 42 and the first cover plate 41 are installed and removed in the same manner, so the installation and removal of the second cover plate 42 will not be described in detail here.

[0067] The above-mentioned first guide slide groove 471, the second guide slide groove 481, the third guide slide groove and the fourth guide slide groove are provided to facilitate the sliding in and out of the first cover plate 41 and the second cover plate 42, simplify the loading and unloading operations of the first cover plate 41 and the second cover plate 42, improve the assembly efficiency of the double-layer battery module 100, and facilitate the replacement of the first battery module 20 and the second battery unit.

[0068] Please refer again Figures 1 to 7 In some optional embodiments, the first side panel 47 includes a first side panel body 473, a first side panel flange 474, and a second side panel flange 475. The first side panel flange 474 and the second side panel flange 475 are disposed along the first direction Z at both ends of the first side panel body 473 and are folded relative to the first side panel body 473 toward the first battery module 20 and the second battery module 30. The second side panel 48 includes a second side panel body 483, a third side panel flange 484, and a fourth side panel flange 485. The third side panel flange 484 and the fourth side panel flange 485 are disposed along the first direction Z at both ends of the second side panel body 483 and are folded relative to the second side panel body 483 toward the first battery module 20 and the second battery module 30.

[0069] When the first battery module 20 and the second battery module 30 are installed on the sandwich heat exchange plate 10, the first battery module 20 abuts against the first side plate flange 474 and the third side plate flange 484, while the second battery module 30 abuts against the second side plate 48 and the fourth side plate. The first side plate flange 474 and the third side plate flange 484 cooperate with the sandwich heat exchange plate 10 to limit the first battery module 20 along the first direction Z. The second side plate flange 475 and the fourth side plate flange 485 cooperate with the sandwich heat exchange plate 10 to limit the second battery module 30 along the first direction Z, thereby reducing the risk of movement of the first battery module 20 and the second battery module 30 along the first direction Z.

[0070] See also Figures 1 to 5In some optional embodiments, the two surfaces of the interlayer heat exchange plate 10 spaced apart along the third direction Y are respectively constructed with a first card groove 13 and a second card groove, a first protrusion 476 is constructed on the first side plate 47, and a second protrusion is constructed on the second side plate 48. The first protrusion 476 is limitedly engaged with the first card groove 13, and the second protrusion is limitedly engaged with the second card groove.

[0071] The first slot 13 cooperates with the first protrusion 476 , and the second slot cooperates with the second protrusion, so as to achieve the limiting and positioning between the first side plate 47 and the second side plate 48 and the interlayer heat exchange plate 10 .

[0072] In some optional embodiments, the two surfaces of the sandwich heat exchange plate 10, spaced apart along the third direction Y, are each constructed with a plurality of first slots 13 and a plurality of second slots. All first slots 13 and all second slots are spaced apart along the first direction Z. In this embodiment, the first protrusions 476 of the first side plate 47 correspond one-to-one with the first slots 13 on the sandwich heat exchange plate 10, and the second protrusions of the second side plate 48 correspond one-to-one with the second slots on the sandwich heat exchange plate 10. When the first protrusions 476 engage with the corresponding first slots 13 and the second protrusions engage with the corresponding second slots, the first side plate 47 and the second side plate 48 experience minimal movement relative to the sandwich heat exchange plate 10 in the first direction Z, thereby enhancing the structural strength of the module box 40.

[0073] In some optional embodiments, the two surfaces of the sandwich heat exchange plate 10, spaced apart along the third direction Y, are each formed with a plurality of first slots 13 and a plurality of second slots. All first slots 13 and all second slots are spaced apart along the second direction X. In this embodiment, the first protrusions 476 of the first side plate 47 correspond one-to-one with the first slots 13 on the sandwich heat exchange plate 10, and the second protrusions of the second side plate 48 correspond one-to-one with the second slots on the sandwich heat exchange plate 10. When the first protrusions 476 engage with the corresponding first slots 13 and the second protrusions engage with the corresponding second slots, the first side plate 47 and the second side plate 48 experience minimal shaking relative to the sandwich heat exchange plate 10 in the second direction X.

[0074] In some optional embodiments, the first card slot 13 and the second card slot on the interlayer heat exchange plate 10 are both through slots that pass through the two surfaces of the interlayer heat exchange plate 10 that are opposite to each other along the second direction X. In this way, the interlayer heat exchange plate 10 can be inserted between the first side plate 47 and the second side plate 48 along the second direction X.

[0075] See also Figures 1 to 3In some optional embodiments, the first end plate 43 includes a first end plate body 431, a first end plate flange 432, and a second end plate flange 433. The first end plate flange 432 and the second end plate flange 433 are disposed on opposite sides of the first end plate body 431 along the third direction Y and are folded relative to the first end plate body 431 in the second direction X, away from the first battery module 20. The second end plate 44 includes a second end plate body 441, a third end plate flange 442, and a fourth end plate flange 443. The third end plate flange 442 and the fourth end plate flange 443 are disposed on opposite sides of the second end plate body 441 along the third direction Y and are folded relative to the second end plate body 441 in the second direction X, away from the first battery module 20. The third end plate 45 includes a third end plate body 451, a fifth end plate flange 452, and a sixth end plate flange 453. The fifth end plate flange 452 and the sixth end plate flange 453 are disposed on opposite sides of the third end plate body 451 along the third direction Y and are folded relative to the third end plate body 451 in the second direction X, away from the second battery module 30. The fourth end plate includes a fourth end plate body, a seventh end plate flange, and an eighth end plate flange. The seventh end plate flange and the eighth end plate flange are disposed on opposite sides of the fourth end plate body along the third direction Y and are folded relative to the fourth end plate body in the second direction X, away from the second battery module 30.

[0076] The first end plate flange 432 and the fifth end plate flange 452 are both screwed to one end edge of the first side plate 47 arranged along the second direction X. The third end plate flange 442 and the seventh end plate flange are both screwed to the other end edge of the first side plate 47 arranged along the second direction X. The second end plate flange 433 and the sixth end plate flange 453 are both screwed to one end edge of the second side plate 48 arranged along the second direction X. The fourth end plate flange 443 and the eighth end plate flange are both screwed to the other end edge of the second side plate 48 arranged along the second direction X. Thus, the first end plate 43, the second end plate 44, the third end plate 45, the fourth end plate, the first side plate 47, and the second side plate 48 are connected to form a whole.

[0077] In addition, in order to ensure the connection strength between the sandwich heat exchange plate 10 and the first side plate 47 and the second side plate 48, the first edge 15 and the second edge of the sandwich heat exchange plate 10 are set along the third direction Y, and the first edge 15 is connected to the first side plate 47 and the second edge is connected to the second side plate 48 by bolts, so as to achieve a fixed connection between the sandwich heat exchange plate 10 and the first side plate 47 and the second side plate 48.

[0078] In some optional embodiments, the module box 40 further includes a first corrugated plate 52 and a second corrugated plate, which are respectively mounted on opposite sides of the first side plate 47 and the second side plate 48 in the third direction Y. The provision of the first corrugated plate 52 and the second corrugated plate can enhance the structural strength of the double-layer battery module 100 and improve the impact resistance of the double-layer battery module 100.

[0079] Specifically, the first corrugated plate 52 and the second corrugated plate have the same structure.

[0080] In some optional embodiments, the gap between the first corrugated plate 52 and the first side plate 47, and the gap between the second corrugated plate and the second side plate 48 are filled with insulation material, thereby achieving a certain insulation effect and reducing the impact of the external environment on the double-layer battery module 100.

[0081] Please refer again Figures 1 to 7 In some optional embodiments, a plurality of first boss groups 521 are projected from the side of the first corrugated plate 52 facing away from the second corrugated plate. All first boss groups 521 are spaced apart along the second direction X. All first bosses 521a in the same first boss group 521 are spaced apart along the first direction Z. First through-holes 521b are defined in the first bosses 521a. A plurality of second boss groups 531 are projected from the side of the second corrugated plate facing away from the first corrugated plate 52. All second boss groups 531 are spaced apart along the second direction X. All second bosses 531 in the same second boss group 531 are spaced apart along the first direction Z. Second through-holes 531a are defined in the second bosses 531. The module box 40 also includes a plurality of first fasteners 50 and a plurality of second fasteners 60. The first fasteners 50 correspond one-to-one to the first boss groups 521, and the first fasteners 50 are passed through all the first through holes 521b in the corresponding first boss groups 521. The second fasteners 60 correspond one-to-one to the second boss groups 531, and the second fasteners 60 are passed through all the second through holes 531a in the corresponding second boss groups 531.

[0082] For example, the first fastener 50 and the second fastener 60 may both be pins, screws, or other structures. For example, if both the first fastener 50 and the second fastener 60 are screws, the first fastener 50 is inserted through the first through-holes 521b of all first bosses 521a in the corresponding first boss group 521, and the second fastener 60 is inserted through the second through-holes 531a of all second bosses 531 in the corresponding second boss group 531. Both the first fastener 50 and the second fastener 60 are threadedly connected to the bottom plate of the battery case, thereby securing the double-layer battery module 100 within the case.

[0083] In some optional embodiments, the module box 40 further includes a first conduit 54 and a second conduit 55. The first through-holes 521b of each adjacent first boss 521a in the same first boss group 521 are connected by the first conduit 54, and the first fastener 50 is disposed through all first conduits 54 connected to the first through-holes 521b in the corresponding first boss group 521. The second through-holes 531a of each adjacent second boss 531 in the same second boss group 531 are connected by the second conduit 55, and the second fastener 60 is disposed through all second conduits 55 connected to the second through-holes 531a in the corresponding second boss group 531. The first conduit 54 is used to guide the installation of the first fastener 50, and the second conduit 55 is used to guide the installation of the second fastener 60. This reduces the risk of displacement of the first and second fasteners 50, 60 during installation and improves the installation accuracy of the double-layer battery module 100.

[0084] See also Figure 8 and Figure 9 In some optional embodiments, the double-layer battery module 100 further includes a transfer bar 70 and an insulating mounting component 80. The transfer bar 70 is mounted on the sandwich heat exchange plate 10 through the insulating mounting component 80, and the transfer bar 70 is used to connect the first battery module 20 and the second battery module 30 in series.

[0085] Specifically, the insulating mounting member 80 includes an insulating mounting seat 81 and insulating terminals 82. The insulating mounting seat 81 is mounted on the sandwich heat exchange plate 10, and the insulating terminals 82 are connected between the insulating mounting seat 81 and the adapter bar 70. The insulating mounting seat 81 and insulating terminals 82 improve the installation and fixing strength of the adapter bar 70.

[0086] See also Figure 1 In some optional embodiments, the double-layer battery module 100 further includes a first output row 90 and a second output row 110, wherein the first output row 90 is electrically connected to the output positive pole of the first battery module 20, and the second output row 110 is electrically connected to the output negative pole of the second battery module 30, thereby being able to output the current and voltage of the double-layer battery module 100.

[0087] In some optional embodiments, the double-layer battery module 100 also includes a first low-voltage output interface 130 and a second low-voltage output interface 140. The first low-voltage output interface 130 is installed on the outer surface of the first end plate 43 facing away from the first battery module 20, and the second low-voltage output interface 140 is installed on the outer surface of the second end plate 44 facing away from the second battery module 30. The double-layer battery module 100 also includes a voltage collection element and a temperature collection element, both of which are located in the internal space of the module box 40. The voltage collection element is used to collect the voltage of the double-layer battery module 100, and the temperature collection element is used to collect the temperature of the double-layer battery module 100. The first low-voltage output interface 130 is used to output and feed back one of the voltage collected by the voltage collection element and the temperature collected by the temperature collection element to the battery's thermal management system. The second low-voltage output interface 140 is used to output and feed back the other of the voltage collected by the voltage collection element and the temperature collected by the temperature collection element to the battery's thermal management system, so that the battery's thermal management system can know the voltage and temperature of the double-layer battery module 100, thereby monitoring the voltage and temperature of the double-layer battery module 100.

[0088] The present application also provides a battery comprising a housing and the double-layer battery module 100 described in any of the above embodiments, wherein the double-layer battery module 100 is disposed within the housing. The battery in the present application has the effects of any of the above embodiments, so details are not repeated here.

[0089] The above-mentioned double-layer battery module 100 and battery are designed so that the surface of the first battery module 20 facing away from its own pole and the surface of the second battery module 30 facing away from its own pole are in contact with the interlayer heat exchange plate 10. Therefore, the first battery module 20 and the second battery module 30 can use the interlayer heat exchange plate 10 for centralized heat exchange. The heat exchange method of the first battery module 20 and the second battery module 30 is simple, the heat exchange effect is good and the heat exchange is balanced, which is conducive to maintaining the performance of the double-layer battery module 100 and extending the service life of the double-layer battery module 100.

[0090] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0091] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A double-layer battery module, characterized in that: The invention comprises a first battery module (20), a second battery module (30) and an interlayer heat exchange plate (10), wherein the first battery module (20) and the second battery module (30) are arranged on opposite sides of the interlayer heat exchange plate (10) along a first direction (Z); wherein the surface of the first battery module (20) facing away from its own pole and the surface of the second battery module (30) facing away from its own pole are both in contact with the interlayer heat exchange plate (10).

2. The double-layer battery module according to claim 1, characterized in that: The double-layer battery module includes a module box (40), the interlayer heat exchange plate (10) is located in the module box (40), and the internal space of the module box (40) is divided into a first space (49) and a second space (51), the first battery module (20) is installed in the first space (49), and the second battery module (30) is installed in the second space (51).

3. The double-layer battery module according to claim 2, characterized in that: The module box (40) includes a first cover plate (41), a second cover plate (42), a first end plate (43), a second end plate (44), a third end plate (45), a fourth end plate, a first side plate (47) and a second side plate (48); The first cover plate (41) and the second cover plate (42) are arranged at intervals along the first direction (Z), the first end plate (43) and the second end plate (44) are located on one side of the interlayer heat exchange plate (10) arranged along the first direction (Z), the third end plate (45) and the fourth end plate are located on the other side of the interlayer heat exchange plate (10) arranged along the first direction (Z), and the first end plate (43) and the second end plate (44), as well as the third end plate (45) and the fourth end plate are arranged at intervals along a second direction (X) intersecting the first direction (Z), the first side plate (47) and the second side plate (48) are arranged at intervals along a third direction (Y) intersecting both the first direction (Z) and the second direction (X), and the first side plate (47) and the second side plate (48) are connected to the first end plate (43), the second end plate (44), the third end plate (45), the fourth end plate and the interlayer heat exchange plate (10); The first side plate (47), the second side plate (48), the first end plate (43), the second end plate (44) and the first cover plate (41) enclose the first space (49), and the first side plate (47), the second side plate (48), the third end plate (45), the fourth end plate and the second cover plate (42) enclose the second space (51).

4. The double-layer battery module according to claim 3, characterized in that: A first guide slide groove (471) and a second guide slide groove (481) are respectively provided at one end of the first side plate (47) and the second side plate (48) arranged along the first direction (Z), and a third guide slide groove (472) and a fourth guide slide groove (482) are respectively provided at the other end of the first side plate (47) and the second side plate (48) arranged along the first direction (Z); The two ends of the first cover plate (41) that are arranged opposite to each other along the third direction (Y) are respectively installed in the first guide slide groove (471) and the second guide slide groove (481), and the two ends of the second cover plate (42) that are arranged opposite to each other along the third direction (Y) are respectively installed in the third guide slide groove (472) and the fourth guide slide groove (482).

5. The double-layer battery module according to claim 3, characterized in that: The two surfaces of the interlayer heat exchange plate (10) spaced apart along the third direction (Y) are respectively formed with a first card slot (13) and a second card slot, the first side plate (47) is formed with a first protrusion (476), the second side plate (48) is formed with a second protrusion, the first protrusion (476) is limitedly matched with the first card slot (13), and the second protrusion is limitedly matched with the second card slot.

6. The double-layer battery module according to claim 3, characterized in that: The module box (40) further includes a first corrugated plate (52) and a second corrugated plate, wherein the first corrugated plate (52) and the second corrugated plate are respectively installed on two sides of the first side plate (47) and the second side plate (48) that are away from each other in the third direction (Y).

7. The double-layer battery module according to claim 6, characterized in that: The gap between the first corrugated plate (52) and the first side plate (47), and the gap between the second corrugated plate and the second side plate (48) are filled with thermal insulation material.

8. The double-layer battery module according to claim 6, characterized in that: A plurality of first boss groups (521) are protruded from the side of the first corrugated plate (52) facing away from the first side plate (47), all the first boss groups (521) are arranged at intervals along the second direction (X), all the first bosses (521a) in the same first boss group (521) are arranged at intervals along the first direction (Z), and a first through hole (521b) is provided on the first boss (521a); A plurality of second bosses (531) are convexly provided on a side of the second corrugated plate facing away from the second side plate (48), all the second bosses (531) are arranged at intervals along the second direction (X), all the second bosses (531) in the same second boss (531) group are arranged at intervals along the first direction (Z), and second through holes (531a) are provided on the second bosses (531); The module box (40) further includes a plurality of first fasteners (50) and a plurality of second fasteners (60), wherein the first fasteners (50) correspond one-to-one to the first boss groups (521), and the first fasteners (50) are inserted into all the first through holes (521b) in the corresponding first boss groups (521), and the second fasteners (60) correspond one-to-one to the second boss (531) groups, and the second fasteners (60) are inserted into all the second through holes (531a) in the corresponding second boss (531) groups.

9. The double-layer battery module according to claim 8, characterized in that: The module box (40) further includes a first conduit (54) and a second conduit (55); the first through holes (521b) of each adjacent two first bosses (521a) in the same first boss group (521) are communicated through the first conduit (54); the first fastener (50) is provided through all the first conduits (54) that are communicated with the first through holes (521b) in the corresponding first boss group (521); the second through holes (531a) of each adjacent two second bosses (531) in the same second boss group (531) are communicated through the second conduit (55); the second fastener (60) is provided through all the second conduits (55) that are communicated with the second through holes (531a) in the corresponding second boss group (531).

10. The double-layer battery module according to claim 1, characterized in that: The double-layer battery module further includes a transfer bar (70) and an insulating mounting component (80), wherein the transfer bar (70) is mounted on the sandwich heat exchange plate (10) via the insulating mounting component (80), and the transfer bar (70) is used to connect the first battery module (20) and the second battery module (30) in series.

11. A battery, characterized in that: A double-layer battery module comprising any one of claims 1 to 10.

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