Battery module and energy storage system

Abstract

The utility model discloses a battery module and energy storage system, battery module includes casing, heat insulating material and a plurality of batteries, and the casing includes a plurality of clamping plates and a plurality of bus bars, and the assembly space is formed between two adjacent clamping plates, and the clamping plate is connected with the bus bar, and the bus bar cover sets up the both ends of assembly space, and the clamping plate is equipped with the lead-out groove, and the lead-out groove is used to communicate outside, and the bus bar at least part from lead-out groove stretches out casing, and a plurality of batteries are sequentially arranged in the assembly space, and the battery is connected with the bus bar electricity. Compared with prior art, the bus bar covers the both ends of assembly space and is connected with the battery electricity, realizes internal electrical connection, avoids uneven distribution of current, simplifies internal wiring problem, and guarantees electrical conduction, and the lead-out groove of clamping plate makes the bus bar partly exposed, avoids the hindering of completely closed structure to electrical connection, realizes the bus bar extension, and simplifies external circuit connection path. At the same time, the lead-out groove is positioned to the bus bar, and avoids the bus bar deviation.

Description

Technical Field

[0001] This utility model relates to the field of new energy battery technology, and in particular to a battery module and energy storage system. Background Technology

[0002] With the rapid development of new energy vehicles, energy storage systems, and portable electronic devices, secondary batteries such as lithium-ion batteries are widely used due to their high energy density and long cycle life. In battery module design, multiple individual cells are typically integrated in series or parallel to meet voltage and capacity requirements in different scenarios. However, existing battery modules still face significant technical bottlenecks in thermal insulation and electrical connection methods, hindering the improvement of the overall performance and safety of battery systems. Utility Model Content

[0003] In view of the shortcomings of the existing technology, this utility model provides a battery module and energy storage system that can simplify electrical connection and improve thermal insulation performance.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A battery module includes a housing, a heat-insulating material, and multiple batteries. The housing includes multiple clamping plates and multiple busbars. An assembly space is formed between adjacent clamping plates. The clamping plates are connected to the busbars, and the busbars cover both ends of the assembly space. The clamping plates have lead-out grooves for communicating with the outside. At least a portion of the busbars extend out of the housing from the lead-out grooves. The multiple batteries are sequentially spaced within the assembly space. The batteries and the busbars are electrically connected. The interval between adjacent batteries forms a first filling space. The clamping plates have filling holes communicating with the first filling space. The heat-insulating material fills the first filling space through the filling holes.

[0006] In one embodiment, the housing includes a baffle, and the baffle is connected between two adjacent clamps. The clamps have slots, and the baffle is inserted into the slots. The baffle and the clamps together form the assembly space.

[0007] In one embodiment, a second filling space is formed between the baffle and the battery, the filling hole communicates with the second filling space, and the heat insulation material is filled into the second filling space through the filling hole; the length of the second filling space is not less than the length of the first filling space along the axis perpendicular to the battery.

[0008] In one embodiment, the housing includes a sealant that seals the slot and / or the filling hole.

[0009] In one embodiment, the housing includes a cover plate disposed on the side of the manifold away from the clamping plate, the cover plate being used to cover the manifold.

[0010] In one embodiment, the clamp is recessed inward on one side of the busbar to form a first recess, and the cover plate is fitted to the first recess; the bottom surface of the first recess is recessed inward to form a second recess, and the busbar is fitted to the second recess.

[0011] In one embodiment, the battery module includes a power socket, which is located outside the assembly space. The busbar extends at least partially from the lead-out slot and is electrically connected to the power socket.

[0012] In one embodiment, the clamping plate has a slot outside the assembly space, the slot and the lead-out slot are located on opposite sides of the clamping plate and are arranged opposite to each other, and the power plug is secured in the slot.

[0013] In one embodiment, the battery module includes a connecting frame, which is detachably connected to the housing; the connecting frame includes a first connecting portion and a second connecting portion, the first connecting portion is clamped to the housing, the second connecting portion is connected to the first connecting portion at an angle and extends away from the first connecting portion, and the second connecting portion is used to connect a fixing beam.

[0014] This utility model also adopts a technical solution to provide an energy storage system, including the battery module and the fixed beam described in any of the above embodiments. The fixed beam is connected to a plurality of the battery modules along its length, and adjacent battery modules are electrically connected.

[0015] The beneficial effects of this utility model are as follows: This application provides a battery module and energy storage system. The battery module includes a housing, heat insulation material, and multiple batteries. The housing includes multiple clamping plates and multiple busbars. An assembly space is formed between two adjacent clamping plates. The clamping plates are connected to the busbars, and the busbars cover both ends of the assembly space. The clamping plates have lead-out slots for connecting to the outside. At least part of the busbars extend out of the housing from the lead-out slots. Multiple batteries are arranged sequentially and spaced apart in the assembly space. The batteries and busbars are electrically connected. The interval between two adjacent batteries forms a first filling space. The clamping plates have filling holes that connect to the first filling space, and the heat insulation material fills the first filling space through the filling holes. Compared with the prior art, the busbars cover both ends of the assembly space and are electrically connected to the batteries, realizing internal electrical connection, avoiding uneven current distribution, simplifying internal wiring problems, and ensuring electrical conduction. The lead-out slots in the clamping plates expose part of the busbars, avoiding the obstruction of electrical connection by a completely enclosed structure, realizing the extension of the busbars, and simplifying the external circuit connection path. Meanwhile, the lead-out slots limit the busbar positioning, preventing it from shifting and improving the stability of the electrical connection. Insulating material is directionally injected into the cell gaps to form a locally reinforced insulation layer, preventing heat transfer from the battery to adjacent cells and improving the battery module's thermal insulation performance. The energy storage system using this battery module exhibits excellent thermal insulation performance and optimized battery wiring design, enhancing system performance. Attached Figure Description

[0016] Figure 1 A schematic diagram of the structure of an energy storage system according to this utility model is shown;

[0017] Figure 2 An exploded view of the components of a battery module according to this utility model is shown;

[0018] Figure 3 A cross-sectional schematic diagram of a battery module according to the present invention is shown;

[0019] Figure 4 It shows Figure 3 Enlarged view of point A in the image;

[0020] Figure 5 This invention provides an internal schematic diagram of a battery module according to the present invention.

[0021] Figure 6 A schematic diagram of the structure of a battery module according to this utility model is shown;

[0022] Reference numerals: 10, Battery module; 1, Housing; 11, Filling hole; 12, Clamping plate; 121, Mounting hole; 122, Slot; 123, Lead-out slot; 124, Card slot; 125, First recess; 126, Second recess; 13, Baffle; 14, Assembly space; 15, Busbar; 16, Cover plate;

[0023] 2. Battery; 21. First filling space; 22. Second filling space;

[0024] 3. Thermal insulation materials;

[0025] 4. Power strip;

[0026] 5. Connecting frame; 51. First connecting part; 52. Second connecting part;

[0027] 20. Fixed beam. Detailed Implementation

[0028] In this utility model, the terms "set up," "equipped with," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or constituent parts. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] The terms “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0031] See Figure 1 This application provides an energy storage system including a battery module 10 and a fixed beam 20. Multiple battery modules 10 are connected to the fixed beam 20 along its length, and adjacent battery modules 10 are electrically connected.

[0032] In practical applications, battery modules 10 can be fixed to the fixed beam 20 via snap-fit ​​or bolt connection. The positive and negative output terminals of adjacent battery modules 10 achieve physical contact and electrical conduction through a pre-set conductive structure, thereby enabling multiple battery modules 10 to form a larger energy storage device. Simultaneously, the design of independently detachable battery modules 10 allows for maintenance or replacement without affecting adjacent components. The removal or installation of a single module does not affect the overall structure, achieving maintainability and scalability of the energy storage system. The extension characteristics of the fixed beam 20 support the addition of modules at both ends to achieve capacity expansion, solving the problem of insufficient integration of battery modules 10 in the energy storage system.

[0033] See Figure 2 , Figure 3 and Figure 4 The aforementioned battery module 10 includes a housing 1, a heat insulation material 3, and multiple batteries 2. The housing 1 includes multiple clamping plates 12 and multiple busbars 15. An assembly space 14 is formed between two adjacent clamping plates 12. The clamping plates 12 are connected to the busbars 15, and the busbars 15 cover both ends of the assembly space 14. The clamping plates 12 have lead-out grooves 123 for connecting to the outside. The busbars 15 extend at least partially from the lead-out grooves 123 out of the housing 1. Multiple batteries 2 are arranged sequentially at intervals in the assembly space 14, and the batteries 2 and the busbars 15 are electrically connected.

[0034] In practical applications, the housing 1 adopts a combination design of clamping plates 12 and busbars 15. The assembly space 14 formed by adjacent clamping plates 12 provides a fixed carrier for the battery 2. Specifically, along the axial direction of the battery 2, the two clamping plates 12 clamp the battery 2 from opposite ends. The clamping plates 12 have mounting holes 121, and the battery 2 is inserted into the mounting holes 121 to facilitate fixing the battery 2. The busbars 15 cover both ends of the assembly space 14 and are electrically connected to the battery 2 to achieve internal electrical connection, avoid uneven current distribution, simplify internal wiring, and ensure electrical conductivity. The lead-out slots 123 on the clamping plates 12 expose part of the busbars 15, avoiding the obstruction of electrical connection by a completely enclosed structure, realizing the extension of the busbars 15, and simplifying the external circuit connection path. At the same time, the lead-out slots 123 limit the busbars 15 to prevent them from shifting, improving the stability of the electrical connection.

[0035] Among them, the busbar 15 refers to the conductive component that connects the electrodes of the battery 2. Specifically, it can be formed by stamping copper-nickel composite plate. Its design covering both ends of the assembly space 14 enables the direct connection of the battery cell tabs.

[0036] See again Figure 3 The gap between two adjacent batteries 2 forms a first filling space 21; the clamping plate 12 has a filling hole 11 that connects to the first filling space 21, and the heat insulation material 3 fills the first filling space 21 through the filling hole 11.

[0037] In practical applications, the first filling space 21 formed by the spaced arrangement of the batteries 2 cooperates with the filling holes 11 on the clamping plate 12. The operator injects the heat insulation material 3 into the gaps between the cells using a syringe, directly filling the area with the highest risk of thermal runaway through the filling holes 11, forming a locally reinforced heat insulation layer. The heat of the battery 2 will not be conducted to the adjacent batteries 2, thus improving the heat insulation performance of the battery module 10. This design ensures controllable cell spacing while achieving precise filling of the heat insulation material 3, solving the problem of uneven distribution of the heat insulation layer in traditional modules.

[0038] Understandably, insulation material 3 can be polyurethane foam, which has a low thermal conductivity and good insulation effect.

[0039] See again Figure 3 The housing 1 also includes a baffle 13, and a baffle 13 is connected between two adjacent clamping plates 12. The clamping plates 12 have slots 122, and the baffle 13 is inserted into the slots 122. The baffle 13 and the clamping plates 12 enclose an assembly space 14.

[0040] In practical applications, the two ends of the baffle 13 are respectively inserted into the slots 122 of the adjacent clamping plates 12, forming a mechanical insertion structure. This not only enhances the connection rigidity between the clamping plates 12, but also creates a closed assembly space 14 through the enclosure effect of the baffle 13 and the clamping plates 12. The slots 122 allow the baffle 13 to be precisely positioned and embedded inside the clamping plates 12. This insertion method simplifies the assembly process and effectively prevents relative displacement between the clamping plates 12 through physical limiting, thereby improving the overall structure's vibration resistance. The enclosure structure of the baffle 13 and the clamping plates 12 not only provides a stable housing space for the battery 2, but also shares external stress through mechanical connection, avoiding structural deformation caused by battery 2 expansion or external impact, thereby indirectly improving the uniformity of the filling of the heat insulation material 3 and the thermal protection effect.

[0041] See again Figure 3 and Figure 4 A second filling space 22 is formed between the baffle 13 and the battery 2. The filling hole 11 is connected to the second filling space 22. The heat insulation material 3 is filled into the second filling space 22 through the filling hole 11. The length of the second filling space 22 is not less than the length of the first filling space 21 along the axis perpendicular to the battery 2.

[0042] In practical applications, the second filling space 22 refers to the gap area between the baffle 13 and the battery 2, extending the heat insulation protection range, which originally only existed in the gap area between the batteries 2, to the edge area of ​​the casing 1, effectively improving the overall thermal runaway protection capability of the module. Specifically, the second filling space 22 formed by the gap between the baffle 13 and the battery 2 is connected through the filling hole 11, allowing the heat insulation material 3 to simultaneously fill the gaps between the batteries 2 and between the battery 2 and the casing 1, eliminating the blind spots in the edge area that cannot be effectively filled in the traditional structure. It is specifically limited that the length of the second filling space 22 in the direction perpendicular to the axis of the battery 2 is not less than that of the first filling space 21, ensuring the necessary thickness of the heat insulation layer at the edge of the casing 1. The heat insulation layer in this part can play a role in protecting and supporting the battery 2. If the casing 1 is subjected to external impact, the heat insulation layer of the second filling space 22 can play a buffering role, preventing damage to the internal battery 2.

[0043] In one embodiment, see Figure 5 The housing 1 includes a sealant (not shown in the figure), a sealant sealing slot 122, and / or a filling hole 11. The sealant refers to a colloidal material with flow-filling properties, specifically silicone or polyurethane, which forms a physical barrier after curing.

[0044] In practical applications, when the baffle 13 is inserted into the slot 122 of the clamp 12, sealant is applied to the contact interface between the slot 122 and the baffle 13. This sealant fills the assembly gap through capillary action, achieving a sealing effect and preventing leakage of the insulation material 3. For the filling hole 11, after the insulation material 3 is injected, sealant is applied to the surface of the hole to form a covering layer, ensuring both sealing performance and without affecting the structural strength of the housing 1.

[0045] See Figure 6 The housing 1 also includes a cover plate 16, which is disposed on the side of the busbar 15 away from the clamping plate 12, and is used to cover the busbar 15.

[0046] In practical applications, a cover plate 16 is added to the outside of the busbar 15 to physically cover and protect the exposed busbar 15. Specifically, the cover plate 16 is placed on the side of the busbar 15 facing away from the clamping plate 12, forming a complete cover over the exposed surface of the busbar 15. This not only prevents foreign objects such as dust and liquids from the external environment from directly contacting the surface of the busbar 15, but also avoids short circuit accidents caused by accidental collisions or accidental contact with metal tools. The cover plate 16 and the clamping plate 12 form a double-layer protective structure, which significantly improves the operational safety of the battery module 10 through mechanical isolation while maintaining the necessary electrical connection function of the busbar 15.

[0047] See again Figure 5The clamping plate 12 is recessed inward on one side of the busbar 15 to form a first recess 125, and the cover plate 16 is assembled to the first recess 125; the bottom surface of the first recess 125 is recessed inward to form a second recess 126, and the busbar 15 is assembled to the second recess 126.

[0048] In practical applications, the first recess 125 refers to a local groove structure formed on the surface of the clamping plate 12 by machining or molding. Its depth matches the thickness of the cover plate 16, and it is used to limit the displacement of the cover plate 16 in the direction perpendicular to the surface of the clamping plate 12. The cover plate 16 achieves mechanical connection with the clamping plate 12 by embedding into the first recess 125. The sidewall of the recess forms a circumferential constraint on the cover plate 16, preventing the cover plate 16 from detaching due to external impact or vibration.

[0049] The second recess 126 refers to a secondary groove that extends further inward from the bottom of the first recess 125. Its outline corresponds to the edge shape of the busbar 15 and is used to constrain the movement of the busbar 15 in a direction parallel to the surface of the clamping plate 12. The busbar 15 is placed in the second recess 126, and its edge is completely surrounded by the recess wall to prevent the busbar 15 from shifting due to force.

[0050] This layered recessed design achieves dual positioning of the cover plate 16 and the busbar 15 within a limited space, ensuring the stability of the electrical connection components while enhancing the sealing and protection effect through the physical isolation of the recessed structure. Furthermore, during assembly, the busbar 15 is first positioned by embedding it into the second recess 126, and then the cover plate 16 is pressed into the first recess 125 to cover the busbar 15. This sequential operation simplifies the assembly process.

[0051] See again Figure 4 The battery module 10 also includes a power socket 4, which is located outside the assembly space 14. The busbar 15 extends at least partially from the lead-out slot 123 and is electrically connected to the power socket 4.

[0052] In practical applications, the power strip 4 refers to a conductive component used to provide an interface for external circuit connections. The power strip 4 is positioned outside the assembly space 14 to avoid occupying the battery 2 arrangement area, while providing independent operating space for electrical interconnection between modules.

[0053] In this assembly space 14, the busbar 15 extends outward from the lead-out slot 123 of the clamping plate 12 to the outside of the assembly space 15. The power socket 4 is fixed at a predetermined position on the outside of the clamping plate 12, with its contact surface overlapping the extended portion of the busbar 15. The busbar 15 and the power socket 4 are fixedly connected by welding or mechanical fastening, allowing the electrodes of the battery module 10 to be connected to the external circuit via the busbar 15-power socket 4 path. The independent placement outside the assembly space 14 ensures that the power socket 4 does not interfere with the arrangement of the batteries 2, while providing visualization and operational space for connection operations. The extended portion of the busbar 15 is constrained by the sidewall within the lead-out slot 123 to prevent positional displacement during the connection process.

[0054] See again Figure 4 The clamping plate 12 has a slot 124 outside the assembly space 14. The slot 124 and the lead-out slot 123 are located on opposite sides of the clamping plate 12, and the slot 124 and the lead-out slot 123 are arranged opposite to each other. The power plug 4 is clamped in the slot 124.

[0055] In practical applications, a slot 124 is formed on the outer side of the clamp 12, opposite to the lead-out slot 123, achieving coordinated positioning of the power socket 4 and the busbar 15. The slots 124 on opposite sides of the clamp 12 form a symmetrical layout with the lead-out slot 123, allowing the busbar 15 extending from the lead-out slot 123 to be precisely aligned with the power socket 4 within the slot 124. The structural design of the slot 124 allows the power socket 4 to be fixed by mechanical snap-fit, simplifying the installation and making operation easier. This symmetrical arrangement of the slots 124 and lead-out slot 123 ensures that the electrical lead-out path of the busbar 15 extending outward is unobstructed, and also ensures that the power socket 4 will not shift under vibration conditions through physical limiting, thereby maintaining a stable electrical contact state.

[0056] It is understandable that relative setting means that the center lines of the card slot 124 and the lead-out slot 123 are aligned or approximately aligned along the thickness direction of the clamping plate 12.

[0057] See again Figure 6 The battery module 10 also includes a connecting frame 5, which is detachably connected to the housing 1. The connecting frame 5 includes a first connecting part 51 and a second connecting part 52. The first connecting part 51 is clamped to the housing 1, and the second connecting part 52 is connected to the first connecting part 51 at an angle and extends away from the first connecting part 51. The second connecting part 52 is used to connect the fixing beam 20.

[0058] In practical applications, the battery module 10 is fixedly connected to the fixed beam 20 through the connecting frame 5. The detachable connection design between the connecting frame 5 and the housing 1 realizes the flexibility of module installation and the convenience of maintenance. The detachable connection can be achieved by bolt connection or other methods.

[0059] Specifically, the first connecting part 51 is fixed to the housing 1 by clamping, avoiding irreversible assembly caused by welding or gluing, while ensuring the reliability of the connection through mechanical clamping force. The second connecting part 52 forms an angled extension structure with the first connecting part 51, allowing the first connecting part 51 to clamp the housing 1 while spatially separating the second connecting part 52 from the fixed beam 20. This prevents the housing 1 from affecting the connection between the second connecting part 52 and the fixed beam 20, ensuring the rigid fixation of the battery module 10 to the fixed beam 20, and providing a structural basis for arranging multiple modules along the length of the fixed beam 20. The angled connection design makes the extension direction of the second connecting part 52 and the clamping direction form a mechanical support structure, which can disperse the stress concentration of the module load on the connection point and improve the overall structural stability. This combination design enables rapid assembly and disassembly while providing a standardized interface for the linear expansion installation of multiple modules in the energy storage system.

[0060] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0061] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0062] The above description is only a specific embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A battery module, characterized by, include: The housing includes multiple clamping plates and multiple busbars, with an assembly space formed between two adjacent clamping plates. The clamping plates are connected to the busbars, and the busbars cover both ends of the assembly space. The clamping plates have lead-out slots for communicating with the outside, and the busbars extend at least partially from the lead-out slots out of the housing. Multiple batteries are arranged sequentially and at intervals within the assembly space. The batteries are electrically connected to the busbar, and the interval between two adjacent batteries forms a first filling space. The heat insulation material is provided, and the clamping plate has a filling hole that communicates with the first filling space. The heat insulation material is filled into the first filling space through the filling hole.

2. The battery module of claim 1, wherein, The housing includes a baffle, and the baffle is connected between two adjacent clamps. The clamps have slots, and the baffle is inserted into the slots. The baffle and the clamps together form the assembly space.

3. The battery module of claim 2, wherein, A second filling space is formed between the baffle and the battery, and the filling hole communicates with the second filling space. The heat insulation material is filled into the second filling space through the filling hole. Along the axis perpendicular to the battery, the length of the second filling space is not less than the length of the first filling space.

4. The battery module of claim 2, wherein, The housing includes a sealant that seals the slot and / or the filling hole.

5. The battery module according to any one of claims 1 to 4, characterized in that, The housing includes a cover plate disposed on the side of the manifold away from the clamping plate, and the cover plate is used to cover the manifold.

6. The battery module of claim 5, wherein, The clamp plate is recessed inward on one side of the manifold to form a first recess, and the cover plate is fitted into the first recess; the bottom surface of the first recess is recessed inward to form a second recess, and the manifold is fitted into the second recess.

7. The battery module according to any one of claims 1 to 4, characterized in that The battery module includes a power socket, which is located outside the assembly space. The busbar extends at least partially from the lead-out slot and is electrically connected to the power socket.

8. The battery module of claim 7, wherein, The clamping plate has a slot outside the assembly space. The slot and the lead-out slot are located on opposite sides of the clamping plate and are arranged opposite to each other. The power plug is secured in the slot.

9. The battery module of any one of claims 1 to 4, wherein, The battery module includes a connecting frame, which is detachably connected to the housing. The connecting frame includes a first connecting part and a second connecting part. The first connecting part is clamped to the housing. The second connecting part is connected to the first connecting part at an angle and extends away from the first connecting part. The second connecting part is used to connect a fixing beam.

10. An energy storage system characterized by, It includes multiple battery modules as described in any one of claims 1 to 9 and a fixing beam, wherein multiple battery modules are connected to the fixing beam along its length direction, and adjacent battery modules are electrically connected.

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