Double-layer battery module and battery
By designing interlayer heat exchange components and pressure relief channels in the double-layer battery module, the problem of heat exchange difficulties in battery modules far away from the box or heat exchange plate is solved, centralized heat exchange and pressure relief are achieved, and the performance and safety of the battery module are improved.
Patent Information
- Application Number
- CN202422404060.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2034-09-29
AI Technical Summary
In a double-layer battery module, the battery module far away from the box or heat exchange plate has difficulty in heat exchange, which affects the performance and deteriorates with the increase of operating time.
The first battery module and the second battery module are designed to be arranged along both sides of the interlayer heat exchange assembly. The interlayer heat exchange assembly includes an interlayer heat exchange plate and a pressure relief channel. The confluence component is inserted into the groove and fits with the interlayer heat exchange plate. The pressure relief port is connected to the explosion-proof valve to achieve centralized heat exchange and pressure relief.
The heat exchange effect of the double-layer battery module is improved, the heat exchange method is simplified, the service life is extended, and the safety and performance of the battery are improved.
Smart Images
Figure CN223333852U_ABST
Abstract
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 comprises a first battery module, a second battery module and an interlayer heat exchange assembly, wherein the first battery module and the second battery module are arranged on opposite sides of the interlayer heat exchange assembly along a first direction;
[0005] Among them, the first battery module is arranged along the first direction and has one end with multiple first convergence components, and the second battery module is arranged along the first direction and has one end with multiple second convergence components, both of which are arranged toward the interlayer heat exchange component and are in contact with the interlayer heat exchange component.
[0006] In some embodiments, the sandwich heat exchange assembly includes a sandwich heat exchange plate, the sandwich heat exchange plate having a first surface and a second surface arranged opposite to each other along the first direction, and a sandwich heat exchange channel located between the first surface and the second surface;
[0007] The first surface is recessed to form a plurality of first grooves, and the first confluence components are inserted into the first grooves corresponding to each other and fit in with the groove walls of the first grooves; the second surface is recessed to form a plurality of second grooves, and the second confluence components are inserted into the second grooves corresponding to each other and fit in with the groove walls of the second grooves;
[0008] Wherein, the first groove and the second groove are not connected to the interlayer heat exchange channel.
[0009] In some embodiments, the sandwich heat exchange plate further has a pressure relief channel located between the first surface and the second surface, the first surface is provided with a plurality of first pressure relief ports communicating with the pressure relief channel, and the second surface is provided with a plurality of second pressure relief ports communicating with the pressure relief channel;
[0010] The first battery module has multiple first explosion-proof valves located on the same side as the multiple first confluence components, and the first explosion-proof valves correspond one-to-one to and are connected to the first pressure relief ports. The second battery module has multiple second explosion-proof valves located on the same side as the multiple second confluence components, and the second explosion-proof valves correspond one-to-one to and are connected to the second pressure relief ports.
[0011] In some embodiments, the sandwich heat exchange assembly further includes a pressure relief baffle, which is located in the pressure relief channel and divides the pressure relief channel into a first sub-pressure relief channel and a second sub-pressure relief channel arranged along the first direction, wherein the first sub-pressure relief channel is closer to the first surface than the second sub-pressure relief channel;
[0012] Wherein, all the first pressure relief ports are communicated with the first sub-pressure relief channel, and all the second pressure relief ports are communicated with the second sub-pressure relief channel.
[0013] In some embodiments, the interlayer heat exchange plate further has an interlayer liquid inlet interface and an interlayer liquid outlet interface, and the interlayer liquid inlet interface and the interlayer liquid outlet interface are both in communication with the interlayer heat exchange channel.
[0014] In some embodiments, the first battery module includes a first battery cell, a plurality of first busbar components, and a first frame, the first battery cell is accommodated in the first frame, the first frame is in contact with the first surface, a plurality of first pole avoidance holes are provided on a cover plate in contact with the first surface, the first battery cell has a plurality of first poles, the first poles are passed through the first pole avoidance holes in a one-to-one correspondence, and every two adjacent first poles are connected by the first busbar component;
[0015] The second battery module includes a second battery cell, a plurality of second current collecting components, and a second frame. The second battery cell is accommodated in the second frame. The second frame is in contact with the second surface. A plurality of second pole avoidance holes are provided on a cover plate in contact with the second surface. The second battery cell has a plurality of second poles. The second poles are passed through the second pole avoidance holes in a one-to-one correspondence. Each adjacent two second poles are connected by the second current collecting component.
[0016] The double-layer battery module further includes a connecting beam, which connects the first frame, the second frame and the sandwich heat exchange plate.
[0017] In some embodiments, the first frame includes a first cover plate, a second cover plate, and a plurality of first support beams, the first cover plate and the second cover plate are arranged on opposite sides of the first battery unit along the first direction, and the first terminal avoidance hole is opened on the first cover plate, all the first support beams are arranged on opposite sides of the first battery unit along a second direction intersecting with the first direction, and the first support beams are connected between the first cover plate and the second cover plate;
[0018] The second frame includes a third cover plate, a fourth cover plate, and a plurality of second support beams, wherein the third cover plate and the fourth cover plate are arranged on opposite sides of the second battery unit along the first direction, the second pole avoidance hole is opened on the third cover plate, and all the second support beams are arranged on opposite sides of the first battery unit along the second direction, and the second support beams are connected between the third cover plate and the fourth cover plate;
[0019] The connecting beams are multiple and are arranged on two opposite sides of the first battery unit along a third direction intersecting both the first direction and the second direction, and the connecting beams are connected to the second cover plate, the fourth cover plate and the interlayer heat exchange plate.
[0020] In some embodiments, a first limiting groove is formed on the first cover plate, and a second limiting groove is formed on the second cover plate, and two opposite ends of the first battery unit disposed along the first direction are respectively limited in the first limiting groove and the second limiting groove;
[0021] A third limiting groove is formed on the third cover plate, and a fourth limiting groove is formed on the fourth cover plate. Two opposite ends of the second battery unit arranged along the first direction are respectively limited in the third limiting groove and the fourth limiting groove.
[0022] In some embodiments, a first heat exchange channel for allowing a heat exchange fluid to flow is provided in the second cover plate, and a second heat exchange channel for allowing a heat exchange fluid to flow is provided in the fourth cover plate.
[0023] A battery comprises a double-layer battery module as described in any one of the above embodiments.
[0024] An electrical device includes the battery as described in the above embodiment, and the electrical device is used to provide electrical energy.
[0025] The above-mentioned double-layer battery module and battery are designed so that the first battery module is arranged along the first direction and has one end of multiple first convergence components, and the second battery module is arranged along the first direction and has one end of multiple second convergence components, both of which are arranged toward the interlayer heat exchange component and are in contact with the interlayer heat exchange component. Therefore, the first battery module and the second battery module can centrally exchange heat through the interlayer heat exchange component located therebetween. The heat exchange method of the first battery module and the second battery module is simple and the heat exchange effect is good, 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
[0026] Figure 1 This is a schematic diagram of the overall structure of a double-layer battery module in one embodiment of the present application;
[0027] Figure 2 for Figure 1 A schematic structural diagram of the interlayer heat exchange component in the double-layer battery module shown;
[0028] Figure 3 for Figure 2 An exploded view of the jacketed heat exchange assembly is shown;
[0029] Figure 4 for Figure 1 A schematic structural diagram of an inverted first battery module in a double-layer battery module is shown;
[0030] Figure 5 for Figure 4 An exploded view of the first battery module is shown;
[0031] Figure 6 for Figure 1 A schematic structural diagram of the second battery module in the double-layer battery module shown;
[0032] Figure 7 for Figure 6 An exploded view of the second battery module is shown.
[0033] Figure Number:
[0034] 100. Double-layer battery module;
[0035] 10. Interlayer heat exchange assembly; 20. First battery module; 30. Second battery module; 40. Connecting beam;
[0036] 11. Interlayer heat exchange plate; 111. First surface; 111a. First groove; 111b. First pressure relief port; 112. Interlayer heat exchange channel; 112a. Direct flow channel; 112b. Channel turning groove; 113. Pressure relief channel; 113a. First sub-pressure relief channel; 113b. Second sub-pressure relief channel; 114. First section; 115. Second section; 116. Middle section; 117. Interlayer liquid inlet port; 118. Interlayer liquid outlet port; 12. Pressure relief baffle;
[0037] 21. First battery unit; 211. First battery cell; 211a. First electrode; 211b. First explosion-proof valve; 22. First confluence component; 23. First cover plate; 231. First electrode avoidance hole; 232. First explosion-proof valve avoidance hole; 233. First cover plate body; 234. First frame edge; 24. Second cover plate; 241. Second cover plate body; 242. Second frame edge; 243. Second limiting groove; 244. First liquid inlet port; 245. First liquid outlet port; 25. First support beam; 26. First tightening belt;
[0038] 31. Second battery unit; 311. Second battery cell; 311a. Second pole; 311b. Second explosion-proof valve; 32. Second confluence member; 33. Third cover plate; 331. Second pole avoidance hole; 332. Second explosion-proof valve avoidance hole; 333. Third cover plate body; 334. Third frame edge; 34. Fourth cover plate; 341. Fourth cover plate body; 342. Fourth frame edge; 343. Fourth limiting groove; 344. Second liquid inlet port; 345. Second liquid outlet port; 35. Second support beam; 36. Second tightening belt; 37. Mounting foot;
[0039] Z, first direction; X, second direction; Y, third direction. DETAILED DESCRIPTION
[0040] 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.
[0041] 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.
[0042] 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.
[0043] 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.
[0044] 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.
[0045] 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.
[0046] 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.
[0047] 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.
[0048] Please also refer to Figures 1 to 7 In order to alleviate the above problems, the applicant has designed a double-layer battery module 100 after in-depth research. The double-layer battery module 100 includes a first battery module 20, a second battery module 30 and an interlayer heat exchange component 10. The first battery module 20 and the second battery module 30 are arranged on opposite sides of the interlayer heat exchange component 10 along the first direction Z; wherein, the first battery module 20 is arranged along the first direction Z and has one end of a plurality of first confluence components 22, and the second battery module 30 is arranged along the first direction Z and has one end of a plurality of second confluence components 32. Both are arranged toward the interlayer heat exchange component 10 and are in contact with the interlayer heat exchange component 10.
[0049] The first direction Z is the stacking direction of the first battery module 20 and the second battery module 30. 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.
[0050] As an example, the first battery module 20 and the second battery module 30 can 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 the third direction Y intersects with both the first direction Z and the second direction X. Figure 1 Taking 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.
[0051] For ease of description, the following embodiments are described as an example in which 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.
[0052] Specifically, the interlayer heat exchange assembly 10 contacts the first battery module 20 and the second battery module 30 and is used to simultaneously cool or heat the first battery module 20 and the second battery module 30. For example, in the summer, when the battery is started, the interlayer heat exchange assembly 10 absorbs heat from the first battery module 20 and the second battery module 30 and cools the first battery module 20 and the second battery module 30. For example, in the winter, when the battery is started, the interlayer heat exchange assembly 10 transfers heat to the first battery module 20 and the second battery module 30 and heats the first battery module 20 and the second battery module 30.
[0053] By designing that the first battery module 20 is arranged along the first direction Z and has one end of multiple first convergence components 22, and the second battery module 30 is arranged along the first direction Z and has one end of multiple second convergence components 32, both are arranged toward the interlayer heat exchange component 10 and are in contact with the interlayer heat exchange component 10, therefore, the first battery module 20 and the second battery module 30 can centrally exchange heat through the interlayer heat exchange component 10 located therebetween. The heat exchange method of the first battery module 20 and the second battery module 30 is simple and the heat exchange effect is good, 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.
[0054] Taking heat exchange for cooling as an example, the advantage of the solution in which the interlayer heat exchange component 10 is located between the first battery module 20 and the second battery module 30 is that it can centrally manage the heat dissipation of the first battery module 20 and the second battery module 30, reduce the risk of heat diffusion, and achieve good cooling effect, thereby achieving an improvement in the performance of the double-layer battery module 100.
[0055] Please also refer to Figures 2 to 6In some optional embodiments, the interlayer heat exchange assembly 10 includes an interlayer heat exchange plate 11, which has a first surface 111 and a second surface arranged opposite to each other along a first direction Z, and an interlayer heat exchange channel 112 located between the first surface 111 and the second surface; the first surface 111 is recessed to form a plurality of first grooves 111a, and the first confluence components 22 are inserted into the first grooves 111a corresponding to each other and fit into the groove walls of the first grooves 111a; the second surface is recessed to form a plurality of second grooves, and the second confluence components 32 are inserted into the second grooves corresponding to each other and fit into the groove walls of the second grooves; wherein, the first grooves 111a and the second grooves are not connected to the interlayer heat exchange channel 112.
[0056] The interlayer heat exchange channel 112 is used to allow a heat exchange fluid to flow, and the heat exchange fluid 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] Specifically, the interlayer heat exchange plate 11 further includes an interlayer liquid inlet port 117 and an interlayer liquid outlet port 118, both of which are connected to the interlayer heat exchange channel 112. The interlayer liquid inlet port 117 is an opening for the inlet of heat exchange fluid, while the interlayer liquid outlet port 118 is an opening for the outlet of heat exchange fluid. The heat exchange fluid can circulate within the heat exchange channel through the interlayer liquid inlet port 117 and the interlayer liquid outlet port 118, thereby improving the heat exchange effect.
[0058] It can be understood that the first confluence component 22 is inserted into the first groove 111a and fits against the groove wall of the first groove 111a, and the second confluence component 32 is inserted into the second groove and fits against the groove wall of the second groove. In this way, the interlayer heat exchange plate 11 and the first confluence component 22 and the second confluence component 32 have a large contact area, which is conducive to the heat exchange between the interlayer heat exchange plate 11 and the first confluence component 22 and the second confluence component 32, thereby realizing the heat exchange between the interlayer heat exchange plate 11 and the first battery module 20 and the second battery module 30, and the heat exchange effect is good.
[0059] In addition, the first battery module 20 further comprises a first module surface, from which the first flow collecting member 22 protrudes. When the first flow collecting member 22 is inserted into the first groove 111a, the first module surface abuts the first surface 111. The second battery module 30 further comprises a second module surface, from which the second flow collecting member 32 protrudes. When the second flow collecting member 32 is inserted into the second groove, the second module surface abuts the second surface. In this case, the contact area between the first and second battery modules 20, 30 and the sandwich heat exchange plate 11 is further increased, thereby enhancing the heat exchange effect.
[0060] For ease of understanding, the first module surface and the second module surface have been explained below and will not be described again here.
[0061] It is worth mentioning that in the present application, the arrangement of the first grooves 111a is consistent with the arrangement of the first busbar 22, and the position of the first grooves 111a is aligned with the position of the first busbar 22 in the first direction Z. The arrangement of the second grooves is consistent with the arrangement of the second busbar 32, and the position of the second grooves is aligned with the position of the second busbar 32 in the first direction Z. The arrangement and position of the first busbar 22 in the first battery module 20, and the arrangement and position of the second busbar 32 in the second battery module 30 are conventional designs in the art and will not be described in detail here.
[0062] Furthermore, in some optional embodiments, the sandwich heat exchange plate 11 further includes a pressure relief channel 113 located between the first surface 111 and the second surface. The first surface 111 is provided with a plurality of first pressure relief ports 111b connected to the pressure relief channel 113, and the second surface is provided with a plurality of second pressure relief ports connected to the pressure relief channel 113. The first battery module 20 includes a plurality of first explosion-proof valves 211b located on the same side as the plurality of first flow confluence members 22, and the first explosion-proof valves 211b correspond one-to-one with and are connected to the first pressure relief ports 111b. The second battery module 30 includes a plurality of second explosion-proof valves 311b located on the same side as the plurality of second flow confluence members 32, and the second explosion-proof valves 311b correspond one-to-one with and are connected to the second pressure relief ports. In this way, when the double-layer battery module 100 experiences thermal runaway, the high-temperature gases released from the first explosion-proof valves 211b and the second explosion-proof valves 311b can be collectively discharged through the pressure relief channel 113 and transferred to the outside of the double-layer battery module 100 to achieve the purpose of pressure relief.
[0063] As an example, the pressure relief channel 113 may be a channel structure with openings at both ends, and the high-temperature gas in the pressure relief channel 113 is discharged through the openings at both ends of the pressure relief channel 113. As an example, the pressure relief channel 113 may also be a channel structure with one end open or one end closed, and the high-temperature gas in the pressure relief channel 113 is centrally discharged through one opening of the pressure relief channel 113. This approach facilitates the layout of a pressure relief pipe within the battery case that guides the high-temperature gas to be discharged outside the battery, thereby simplifying the battery structure.
[0064] It is worth mentioning that in the present application, the arrangement of the first explosion-proof valve 211b is consistent with the arrangement of the first pressure relief port 111b, and the position of the first explosion-proof valve 211b is aligned with the position of the first pressure relief port 111b in the first direction Z. The arrangement of the second explosion-proof valve 311b is consistent with the arrangement of the second pressure relief port, and the position of the second explosion-proof valve 311b is aligned with the position of the second pressure relief port in the first direction Z. The position and arrangement of the first explosion-proof valve 211b in the first battery module 20, and the position and arrangement of the second explosion-proof valve 311b in the second battery module 30 are conventional designs in the art and will not be described in detail here.
[0065] Furthermore, in some optional embodiments, the interlayer heat exchange assembly 10 also includes a pressure relief baffle 12, which is located in the pressure relief channel 113 and divides the pressure relief channel 113 into a first sub-pressure relief channel 113a and a second sub-pressure relief channel 113b arranged along the first direction Z. The first sub-pressure relief channel 113a is closer to the first surface 111 relative to the second sub-pressure relief channel 113b; wherein all first pressure relief ports 111b are connected to the first sub-pressure relief channel 113a, and all second pressure relief ports are connected to the second sub-pressure relief channel 113b.
[0066] Since the first explosion-proof valve 211b of the first battery module 20 corresponds to the second explosion-proof valve 311b of the second battery module 30, and the corresponding first explosion-proof valve 211b and second explosion-proof valve 311b are arranged opposite to each other in the first direction Z, a partition can be provided to separate the corresponding first explosion-proof valve 211b and second explosion-proof valve 311b, thereby preventing the high-temperature gas ejected from at least one of the first explosion-proof valve 211b and the second explosion-proof valve 311b from impacting the other of the first explosion-proof valve 211b and the second explosion-proof valve 311b when thermal runaway occurs, thereby improving the safety of battery use.
[0067] See also Figure 2 and Figure 3In some optional embodiments, the sandwich heat exchange plate 11 has a three-section structure and includes a first section 114, a second section 115, and an intermediate section 116 connected between the first and second sections 114, 115. The first section 114 has an interlayer liquid inlet port 117, an interlayer liquid outlet port 118, and an opening for the pressure relief channel 113. The intermediate section 116 is designed with a straight flow channel 112a, and the second section 115 is designed with a flow channel deflection groove 112b. The straight flow channel 112a of the intermediate section 116 and the flow channel deflection groove 112b of the second section 115 are spliced to form the sandwich heat exchange channel 112. The flow channel deflection groove 112b can deflect and guide the heat exchange fluid, allowing the heat exchange fluid to circulate within the straight flow channel 112a of the intermediate section 116. In addition, the pressure relief channel 113 extends from the middle section 116 and passes through the first section 114 . The middle section 116 is provided with a first groove 111 a , a second groove, a first pressure relief port 111 b , and a second pressure relief port.
[0068] Please refer again Figure 1 , and also see Figures 4 to 7 The first battery module 20 includes a first battery unit 21, a plurality of first current collecting components 22 and a first frame. The first battery unit 21 is accommodated in the first frame. The first frame is in contact with the first surface 111. A plurality of first pole avoidance holes 231 are provided on the cover plate in contact with the first surface 111. The first battery unit 21 has a plurality of first poles 211a. The first poles 211a are passed through the first pole avoidance holes 231 corresponding to each other one by one, and each adjacent two first poles 211a are connected by the first current collecting component 22. The second battery module 30 includes a second battery unit 31, a plurality of second flow-collecting components 32 and a second frame. The second battery unit 31 is accommodated in the second frame. The second frame is bonded to the second surface. A plurality of second pole avoidance holes 331 are provided on the cover plate bonded to the second surface. The second battery unit 31 has a plurality of second poles 311a. The second poles 311a are passed through the second pole avoidance holes 331 corresponding to each other one by one. Each adjacent two second poles 311a are connected by the second flow-collecting component 32. The double-layer battery module also includes a connecting beam 40, which connects the first frame, the second frame and the sandwich heat exchange plate 11.
[0069] Specifically, the first battery unit 21 includes a plurality of first battery cells 211 arranged in series along the second direction X. Each of the first battery cells 211 has a first explosion-proof valve 211b and a first terminal 211a. All first explosion-proof valves 211b and first terminals 211a in the first battery unit 21 are positioned toward the sandwich heat exchange plate 11. To restrain the first battery cells 211, a first tightening band 26 is provided around the first battery unit 21.
[0070] The first frame is provided with a plurality of first pole avoidance holes 231 and a plurality of first explosion-proof valve avoidance holes 232. The first poles 211a are disposed through corresponding first pole avoidance holes 231. The first confluence member 22 is located on the side of the first frame facing the sandwich heat exchange plate 11, and each adjacent pair of first poles 211a is connected by the first confluence member 22. The first explosion-proof valves 211b and the corresponding first explosion-proof valve avoidance holes 232 are aligned in a first direction Z, so that high-temperature gas ejected from the first explosion-proof valves 211b can sequentially enter the pressure relief channel 113 through the corresponding first explosion-proof valve avoidance holes 232 and the corresponding first pressure relief port 111b.
[0071] When the first frame contacts the sandwich heat exchange plate 11, the surface of the first frame facing the sandwich heat exchange plate 11 abuts against the first surface 111. The first confluence member 22 is inserted into the first groove 111a of the first surface 111 and abuts against the wall of the first groove 111a, thereby achieving a close fit between the first frame and the sandwich heat exchange plate 11 and facilitating heat exchange. It is understood that the surface of the first frame facing the sandwich heat exchange plate 11 is the aforementioned first module surface.
[0072] All first support beams 25 are arranged on opposite sides of the first battery unit 21 along the second direction X, and the first support beams 25 are connected between the first cover plate 23 and the second cover plate 24. In this way, the first cover plate 23, the second cover plate 24 and the first battery unit 21 are integrated to form a first battery module 20.
[0073] Specifically, the second battery unit 31 includes a plurality of second battery cells 311 arranged in a second direction X and connected in series. Each second battery cell 311 has a second explosion-proof valve 311b and a second terminal 311a. All second explosion-proof valves 311b and second terminals 311a in the second battery unit 31 are positioned toward the sandwich heat exchange plate 11. To restrain the second battery cells 311, a second tightening band 36 is provided around the second battery unit 31.
[0074] The second frame is provided with a plurality of second pole avoidance holes 331 and a plurality of second explosion-proof valve avoidance holes 332. The second poles 311a are disposed through corresponding second pole avoidance holes 331. The second confluence member 32 is located on the side of the third cover plate 33 facing the sandwich heat exchange plate 11, and each adjacent second pole 311a is connected by the second confluence member 32. The second explosion-proof valves 311b and the corresponding second explosion-proof valve avoidance holes 332 are aligned in the first direction Z, so that the high-temperature gas ejected from the second explosion-proof valves 311b can enter the pressure relief channel 113 through the corresponding second explosion-proof valve avoidance holes 332 and the corresponding second pressure relief port in sequence.
[0075] When the second frame contacts the sandwich heat exchange plate 11, the surface of the second frame facing the sandwich heat exchange plate 11 aligns with the second surface. The second confluence member 32 is inserted into the second groove on the second surface and aligns with the groove wall of the second groove, thereby achieving a close fit between the second frame and the sandwich heat exchange plate 11 and facilitating heat exchange. It is understood that the surface of the third cover plate 33 facing the sandwich heat exchange plate 11 is the aforementioned second module surface.
[0076] The connecting beam 40 connects the first frame, the second frame and the sandwich heat exchange plate 11 , so that the first battery module 20 , the second battery module 30 and the sandwich heat exchange plate 11 can be connected to form a double-layer battery module 100 .
[0077] The first and second frames protect the first and second battery cells 21, 31, reducing the risk of damage to the first and second battery cells 21, 31 due to vibration during battery transportation or use. The connecting beams 40 connect the first and second battery modules 20, 30, and the sandwich heat exchange plate 11 to form a single unit, facilitating assembly of the double-layer battery module 100.
[0078] Furthermore, in some optional embodiments, the first frame includes a first cover plate 23, a second cover plate 24 and a plurality of first support beams 25, the first cover plate 23 and the second cover plate 24 are arranged on opposite sides of the first battery unit 21 along the first direction Z, and a first pole avoidance hole 231 is provided on the first cover plate 23, all the first support beams 25 are arranged on opposite sides of the first battery unit 21 along a second direction X intersecting with the first direction Z, and the first support beams 25 are connected between the first cover plate 23 and the second cover plate 24. The second frame includes a third cover plate 33, a fourth cover plate 34, and a plurality of second support beams 35. The third and fourth cover plates 33, 34 are arranged on opposite sides of the second battery cell 31 along the first direction Z. The third cover plate 33 is provided with a second pole avoidance hole 331. All second support beams 35 are arranged on opposite sides of the first battery cell 21 along the second direction X, and the second support beams 35 are connected between the third and fourth cover plates 33, 34. A plurality of connecting beams 40 are arranged on opposite sides of the first battery cell 21 along a third direction Y that intersects both the first direction Z and the second direction X. The connecting beams 40 are connected to the second and fourth cover plates 24, 34, and the interlayer heat exchange plate 11. This form of double-layer battery module 100 provides a secure connection and strong integrity.
[0079] As an example, the first cover plate 23 and the second cover plate 24 and the first support beam 25, the third cover plate 33 and the fourth cover plate 34 and the second support beam 35, and the second cover plate 24 and the fourth cover plate 34 and the connecting beam 40 can all be fixedly connected by bolts.
[0080] In some optional embodiments, a first limiting groove is provided on the first cover plate 23, a second limiting groove 243 is provided on the second cover plate 24, and the two ends of the first battery unit 21 that are relatively arranged along the first direction Z are respectively limited in the first limiting groove and the second limiting groove 243; a third limiting groove is provided on the third cover plate 33, and a fourth limiting groove 343 is provided on the fourth cover plate 34, and the two ends of the second battery unit 31 that are relatively arranged along the first direction Z are respectively limited in the third limiting groove and the fourth limiting groove 343.
[0081] The first and second limiting grooves 243 limit and constrain the first battery unit 21, facilitating assembly of the first battery unit 21 with the first and second cover plates 23 and 24. The third and fourth limiting grooves 343 limit the second battery unit 31, facilitating assembly of the second battery unit 31 with the third and fourth cover plates 33 and 34.
[0082] Specifically, the first cover plate 23 includes a first cover plate body 233 and a first frame rim 234. The first cover plate body 233 is provided with a first pole avoidance hole 231 and a first explosion-proof valve avoidance hole 232. The first frame rim 234 is disposed circumferentially around the first cover plate body 233 and forms a first limiting groove around the first cover plate body 233. The second cover plate 24 includes a second cover plate body 241 and a second frame rim 242. The second frame rim 242 is disposed circumferentially around the second cover plate body 241 and forms a second limiting groove 243 around the second cover plate body 241.
[0083] The third cover plate 33 includes a third cover plate body 333 and a third frame 334. The third cover plate body 333 is provided with a second pole avoidance hole 331 and a second explosion-proof valve avoidance hole 332. The third frame 334 is disposed circumferentially around the third cover plate body 333 and forms a third limiting groove with the third cover plate body 333. The fourth cover plate 34 includes a fourth cover plate body 341 and a fourth frame 342. The fourth frame 342 is disposed circumferentially around the fourth cover plate body 341 and forms a fourth limiting groove 343 with the fourth cover plate body 341.
[0084] In some optional embodiments, a first heat exchange channel for allowing a heat exchange fluid to flow is provided in the second cover plate 24 , and a second heat exchange channel for allowing a heat exchange fluid to flow is provided in the fourth cover plate 34 .
[0085] Specifically, the second cover plate body 241 has a first heat exchange channel therein, and is provided with a first liquid inlet port 244 and a first liquid outlet port 245. Both the first liquid inlet port 244 and the first liquid outlet port 245 are connected to the first heat exchange channel to complete the circulation of the heat exchange fluid within the first heat exchange channel. The fourth cover plate body 341 has a second heat exchange channel therein, and is provided with a second liquid inlet port 344 and a second liquid outlet port 345. Both the second liquid inlet port 344 and the second liquid outlet port 345 are connected to the second heat exchange channel to complete the circulation of the heat exchange fluid within the second heat exchange channel.
[0086] The interlayer heat exchange plate 11 cooperates with the second cover plate 24 and performs heat exchange on the first battery cell 21 from both sides of the first battery cell 21 along the first direction Z. The interlayer heat exchange plate 11 cooperates with the fourth cover plate 34 and performs heat exchange on the second battery cell 31 from both sides of the second battery cell 31 along the first direction Z. The heat exchange effect is good, which is beneficial to improving the battery working performance.
[0087] In some optional embodiments, a plurality of mounting feet 37 are further provided around the second cover plate 24 or the fourth cover plate 34. When the mounting feet 37 are located at the bottom of the double-layer battery module 100, bolts can be used to secure the entire double-layer battery module 100 to the interior of the battery case. For example, if the mounting feet 37 are provided on the second cover plate 24, the first battery module 20 is the lower battery module. For example, if the mounting feet 37 are provided on the fourth cover plate 34, the second battery module 30 is the lower battery module.
[0088] The present application also provides a battery comprising a housing and the double-layer battery module 100 described in any one of the above embodiments. The battery in the present application has the effects brought about by any one of the above embodiments, so they will not be described in detail here.
[0089] Specifically, the bottom plate of the box is a bottom heat exchange plate, and a bottom heat exchange channel is provided in the bottom heat exchange plate. The bottom heat exchange channel is used for the flow of heat exchange fluid. The heat exchange fluid in the bottom heat exchange channel exchanges heat with the double-layer battery module 100 to achieve cooling or heating of the double-layer battery module 100.
[0090] The above-mentioned double-layer battery module 100 and battery are designed so that the first battery module 20 is arranged along the first direction Z and has one end of multiple first convergence components 22, and the second battery module 30 is arranged along the first direction Z and has one end of multiple second convergence components 32, both of which are arranged toward the interlayer heat exchange component 10 and are in contact with the interlayer heat exchange component 10. Therefore, the first battery module 20 and the second battery module 30 can centrally exchange heat through the interlayer heat exchange component 10 located therebetween. The heat exchange method of the first battery module 20 and the second battery module 30 is simple and the heat exchange effect is good, 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.
[0091] 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.
[0092] 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 component (10), wherein the first battery module (20) and the second battery module (30) are arranged on opposite sides of the interlayer heat exchange component (10) along a first direction (Z); The first battery module (20) is arranged along the first direction (Z) and has one end with a plurality of first confluence components (22), and the second battery module (30) is arranged along the first direction (Z) and has one end with a plurality of second confluence components (32), both of which are arranged toward the interlayer heat exchange component (10) and are in contact with the interlayer heat exchange component (10).
2. The double-layer battery module according to claim 1, characterized in that: The interlayer heat exchange assembly (10) comprises an interlayer heat exchange plate (11), the interlayer heat exchange plate (11) having a first surface (111) and a second surface arranged opposite to each other along the first direction (Z), and an interlayer heat exchange channel (112) located between the first surface (111) and the second surface; The first surface (111) is recessed to form a plurality of first grooves (111a), and the first confluence components (22) are inserted into the first grooves (111a) corresponding to each other and fit with the groove walls of the first grooves (111a); the second surface is recessed to form a plurality of second grooves, and the second confluence components (32) are inserted into the second grooves corresponding to each other and fit with the groove walls of the second grooves; Wherein, the first groove (111a) and the second groove are not connected to the interlayer heat exchange channel (112).
3. The double-layer battery module according to claim 2, characterized in that: The interlayer heat exchange plate (11) further comprises a pressure relief channel (113) located between the first surface (111) and the second surface; the first surface (111) is provided with a plurality of first pressure relief ports (111b) in communication with the pressure relief channel (113); and the second surface is provided with a plurality of second pressure relief ports in communication with the pressure relief channel (113); The first battery module (20) has a plurality of first explosion-proof valves (211b) located on the same side as the plurality of first confluence components (22), and the first explosion-proof valves (211b) correspond one-to-one with and are connected to the first pressure relief port (111b). The second battery module (30) has a plurality of second explosion-proof valves (311b) located on the same side as the plurality of second confluence components (32), and the second explosion-proof valves (311b) correspond one-to-one with and are connected to the second pressure relief port.
4. The double-layer battery module according to claim 3, characterized in that: The interlayer heat exchange component (10) further comprises a pressure relief baffle (12), the pressure relief baffle (12) being located in the pressure relief channel (113) and dividing the pressure relief channel (113) into a first sub-pressure relief channel (113a) and a second sub-pressure relief channel (113b) arranged along the first direction (Z), the first sub-pressure relief channel (113a) being closer to the first surface (111) relative to the second sub-pressure relief channel (113b); Wherein, all the first pressure relief ports (111b) are in communication with the first sub-pressure relief channel (113a), and all the second pressure relief ports are in communication with the second sub-pressure relief channel (113b).
5. The double-layer battery module according to claim 2, characterized in that: The interlayer heat exchange plate (11) also has an interlayer liquid inlet interface (117) and an interlayer liquid outlet interface (118), and the interlayer liquid inlet interface (117) and the interlayer liquid outlet interface (118) are both in communication with the interlayer heat exchange channel (112).
6. The double-layer battery module according to any one of claims 2 to 5, characterized in that: The first battery module (20) comprises a first battery unit (21), a plurality of the first current collecting components (22) and a first frame, wherein the first battery unit (21) is accommodated in the first frame, the first frame is in contact with the first surface (111), a plurality of first pole avoidance holes (231) are provided on a cover plate in contact with the first surface (111), the first battery unit (21) has a plurality of first poles (211a), the first poles (211a) are passed through the first pole avoidance holes (231) corresponding to each other, and each two adjacent first poles (211a) are connected via the first current collecting component (22); The second battery module (30) comprises a second battery unit (31), a plurality of second current collecting components (32) and a second frame. The second battery unit (31) is accommodated in the second frame. The second frame is bonded to the second surface. A plurality of second pole avoidance holes (331) are provided on a cover plate bonded to the second surface. The second battery unit (31) has a plurality of second poles (311a). The second poles (311a) are passed through the second pole avoidance holes (331) in a one-to-one correspondence with each other. Each adjacent two second poles (311a) are connected via the second current collecting component (32). The double-layer battery module further comprises a connecting beam (40), wherein the connecting beam (40) connects the first frame, the second frame and the sandwich heat exchange plate (11).
7. The double-layer battery module according to claim 6, characterized in that: The first frame comprises a first cover plate (23), a second cover plate (24) and a plurality of first support beams (25); the first cover plate (23) and the second cover plate (24) are arranged on opposite sides of the first battery unit (21) along the first direction (Z); the first pole avoidance hole (231) is provided on the first cover plate (23); all the first support beams (25) are arranged on opposite sides of the first battery unit (21) along a second direction (X) intersecting the first direction (Z); and the first support beams (25) are connected between the first cover plate (23) and the second cover plate (24); The second frame comprises a third cover plate (33), a fourth cover plate (34) and a plurality of second support beams (35); the third cover plate (33) and the fourth cover plate (34) are arranged on opposite sides of the second battery unit (31) along the first direction (Z); the third cover plate (33) is provided with a second pole avoidance hole (331); all the second support beams (35) are arranged on opposite sides of the first battery unit (21) along the second direction (X), and the second support beams (35) are connected between the third cover plate (33) and the fourth cover plate (34); The connecting beams (40) are multiple and are arranged on two opposite sides of the first battery unit (21) along a third direction (Y) intersecting both the first direction (Z) and the second direction (X), and the connecting beams (40) are connected to the second cover plate (24), the fourth cover plate (34) and the interlayer heat exchange plate (11).
8. The double-layer battery module according to claim 7, characterized in that: A first limiting groove is provided on the first cover plate (23), and a second limiting groove (243) is provided on the second cover plate (24); two opposite ends of the first battery unit (21) arranged along the first direction (Z) are respectively limited in the first limiting groove and the second limiting groove (243); A third limiting groove is provided on the third cover plate (33), a fourth limiting groove (343) is provided on the fourth cover plate (34), and two opposite ends of the second battery unit (31) arranged along the first direction (Z) are respectively limited in the third limiting groove and the fourth limiting groove (343).
9. The double-layer battery module according to claim 7, characterized in that: A first heat exchange channel for allowing heat exchange fluid to flow is provided in the second cover plate (24), and a second heat exchange channel for allowing heat exchange fluid to flow is provided in the fourth cover plate (34).
10. A battery, characterized in that: A double-layer battery module comprising any one of claims 1 to 9.