Battery module and battery pack with same

Abstract

The utility model provides a battery module and a battery pack with the battery module, and the battery module comprises a plurality of battery cells which are sequentially arranged along the length direction of the battery module, and the top of each battery cell is provided with a pole; the CCS assembly is arranged above the battery cells, the CCS assembly comprises a plurality of conducting strips, the two ends of each conducting strip are electrically connected with the pole columns of the two adjacent battery cells respectively, each conducting strip is provided with a deformation part and two connecting parts which are connected with each other in the length direction of the battery module, and the two connecting parts are connected with the pole columns of the two adjacent battery cells respectively; the deformation part upwards and / or downwards protrudes out of the connecting part, and the conducting strip can generate deformation quantity in the length direction of the battery module; and the heat insulation part is arranged between the two adjacent battery cells so as to reduce heat transfer between the two adjacent battery cells. According to the technical scheme provided by the invention, the problem that in the prior art, when the heat insulation effect of the heat insulation pad of the battery module is weakened, the expanded battery core still pulls the aluminum row, and an electrical accident easily occurs can be solved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a battery module and a battery pack having the same. Background Technology

[0002] With the continuous development and application of battery technology, especially for high-energy-density battery modules, batteries generate significant heat during charging and discharging. This heat accumulation not only leads to an increase in battery temperature but also causes the battery cells to expand. When the battery cells expand, they exert significant tensile forces on surrounding structural components, especially conductive connectors such as aluminum busbars. These tensile forces may cause deformation of the aluminum busbars, and in severe cases, may even lead to poor electrical connections or short circuits, thereby triggering battery thermal runaway and causing significant damage to the battery system.

[0003] In existing technologies, thermal insulation pads are typically added between battery cells to reduce thermal impact through physical isolation. However, as battery modules are used over time, the thermal insulation pad material loses its original insulation properties due to aging, and its insulating effect gradually weakens. As a result, even with the thermal insulation pads in place, the expansion of the battery cells can still directly pull on the aluminum busbars, causing deformation and unstable electrical connections. Over time, this increases the risk of battery thermal runaway and reduces the overall safety and lifespan of the battery module. Utility Model Content

[0004] The main objective of this application is to provide a battery module and a battery pack having the same, in order to solve the problem in the related art that when the heat insulation effect of the heat insulation pad of the battery module weakens, the expanding battery cell will still pull the aluminum busbar, which is prone to electrical accidents.

[0005] To achieve the above objectives, according to one aspect of this application, a battery module is provided, comprising: a plurality of battery cells arranged sequentially along the length of the battery module, each battery cell having a terminal post at its top; a CCS assembly disposed above the battery cells, the CCS assembly including a plurality of conductive sheets, each conductive sheet having two ends electrically connected to the terminals of two adjacent battery cells, each conductive sheet having a deformable portion and two connecting portions connected to each other along the length of the battery module, the two connecting portions being connected to the terminals of two adjacent battery cells respectively, the deformable portion protruding upward and / or downward from the connecting portions, the conductive sheet being capable of generating deformation along the length of the battery module to absorb the expansion deformation of the two adjacent battery cells; and a heat insulation element disposed between two adjacent battery cells to reduce heat transfer between the two adjacent battery cells.

[0006] Furthermore, at least part of the deformable portion protrudes from the connecting portion along the height direction of the battery module, and there is a gap between the deformable portion and the battery cell. When the battery cell expands and deforms, the gap becomes smaller or larger.

[0007] Furthermore, the extension direction of the deformable part is perpendicular to the length direction of the battery module, and two adjacent cells have a gap along the length direction of the battery module. The deformable part is arranged corresponding to the gap, and the projection of the deformable part in the vertical direction covers the gap.

[0008] Furthermore, the deformable part includes an intermediate section and two transition sections, which are located at both ends of the intermediate section along the length of the battery module. The transition sections are disposed between the intermediate section and the connecting part, and at least one of the transition sections is inclined from one of the connecting parts toward the other connecting part.

[0009] Furthermore, the heat insulation component includes a heat insulation layer and a mounting portion, the mounting portion having a receiving cavity inside, at least a portion of the heat insulation layer being located within the receiving cavity, and the mounting portion being disposed between the heat insulation layer and the battery cell.

[0010] Furthermore, the mounting section includes two silicone layers, which are located on both sides of the heat insulation layer along the length of the battery module. The side of the silicone layer facing the heat insulation layer is provided with a mounting groove, and part of the heat insulation layer is located in the mounting groove. The mounting grooves of the two silicone layers cooperate with each other to form a receiving cavity.

[0011] Furthermore, the CCS assembly also includes a data acquisition harness located above and electrically connected to the conductive sheet. The data acquisition harness contains multiple data acquisition modules used to acquire the operating parameters of the battery cell.

[0012] Furthermore, the battery module also includes a steel strip and two end plates, which are spaced apart along the length of the battery module, and multiple cells are arranged sequentially between the two end plates; the steel strip extends in the same direction as the length of the battery module, and is sleeved on the two end plates and the outside of the cells.

[0013] Furthermore, the battery module also includes an insulating sheet, which is disposed between the conductive sheet and the battery cell. Along the length of the battery module, the insulating sheet has multiple through holes distributed at both ends along the width of the battery module. Each of the multiple through holes corresponds to a multiple terminal post. The end of the terminal post away from the battery cell passes through the through hole and is electrically connected to the conductive sheet. The insulating sheet also has multiple first openings spaced along the length of the battery module. Each of the multiple first openings corresponds to an explosion-proof valve on a multiple battery cell.

[0014] Furthermore, the battery module also includes foam, which is disposed between the battery cell and the insulating sheet, and located between the two terminals of the battery cell; the foam is also provided with multiple second ports at intervals along the length of the battery module, and the multiple second ports are respectively provided with explosion-proof valves on multiple battery cells.

[0015] According to another aspect of this application, a battery pack is provided, the battery pack including a housing and a plurality of battery modules, the housing having a mounting cavity, the plurality of battery modules being disposed within the mounting cavity, the battery modules being the aforementioned battery modules.

[0016] Applying the technical solution of this application, the battery cell undergoes expansion and contraction during charging and discharging, generating heat. The heat insulation component reduces heat transfer between adjacent cells, preventing heat concentration within the module and thus avoiding performance degradation or safety issues caused by localized overheating. Furthermore, in the event of thermal runaway, the heat insulation component can slow the diffusion of heat to other cells, preventing the entire module or battery pack from entering an uncontrollable thermal runaway state. The conductive sheet can deform along the length of the battery module, i.e., in the direction of cell deformation. The deformed portion effectively absorbs and buffers the expansion deformation of the cell. Therefore, even in the event of cell expansion, it avoids the risk of current interruption or short circuit due to excessive stretching and breakage of the CCS module, ensuring reliable contact between the connection and the terminal, maintaining good current conduction performance, and ensuring the stability of the electrical connection. This improves the overall safety and structural stability of the battery module and extends its service life. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 A schematic diagram of the structure of a battery module provided according to an embodiment of this application is shown;

[0019] Figure 2 A partial exploded view of a battery module provided according to an embodiment of this application is shown;

[0020] Figure 3 A schematic diagram of the structure of the conductive sheet provided according to an embodiment of this application is shown;

[0021] Figure 4 A side view of the structure of the conductive sheet provided according to an embodiment of this application is shown;

[0022] Figure 5 An exploded view of a heat insulation component provided according to an embodiment of this application is shown.

[0023] The above figures include the following reference numerals:

[0024] 10. Battery cell; 11. Terminal;

[0025] 20. Conductive sheet; 21. Deformation section; 211. Intermediate section; 212. Transition section; 22. Connecting section;

[0026] 30. Thermal insulation component; 31. Thermal insulation layer; 32. Silicone layer; 322. Assembly groove;

[0027] 40. Steel strip; 50. End plate; 60. Insulating sheet; 70. Foam; 80. Connecting seat; 90. Explosion-proof valve. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0029] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0030] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0031] like Figure 1 and Figure 2As shown in the figure, this application provides a battery module, which includes: multiple battery cells 10, a CCS assembly, and a heat insulation component 30. The multiple battery cells 10 are arranged sequentially along the length of the battery module, and each battery cell 10 has a terminal post 11 at its top. The CCS assembly is disposed above the battery cells 10, and the multiple battery cells 10 are connected in series through the CCS assembly. The CCS assembly includes multiple conductive sheets 20, with both ends of each conductive sheet 20 electrically connected to the terminals 11 of two adjacent battery cells 10. Each conductive sheet 20 has an interconnected deformable portion 21 and two connecting portions 22 along the length of the battery module. The two connecting portions 22 are respectively connected to the terminals 11 of two adjacent battery cells 10. The deformable portion 21 protrudes upward and / or downward from the connecting portion 22, allowing the conductive sheet 20 to deform along the length of the battery module to absorb the expansion deformation of the two adjacent battery cells 10. The heat insulation component 30 is disposed between two adjacent battery cells 10 to reduce heat transfer between them. The battery module extends horizontally. Specifically, the plane formed by the X-axis and Y-axis is a horizontal plane. The X-axis is located in the length direction of the battery module, the Y-axis is located in the width direction of the battery module, and the Z-axis is located in the vertical direction, that is, the height direction of the battery module.

[0032] In this battery cell 10, there are two terminals 11 along the width direction of the battery module. The two terminals 11 are the positive and negative terminals of the battery cell 10, respectively. The two connecting parts 22 of a conductive sheet 20 are connected to the positive terminal of one battery cell 10 and the negative terminal of another adjacent battery cell 10, respectively.

[0033] In this application, the specific number of battery cells 10 is not limited. The battery module can be a long module formed by 26 battery cells 10 connected in series, or a regular module formed by 13 battery cells 10 connected in series. The number of battery cells 10 can be increased or decreased according to actual needs.

[0034] Applying the technical solution of this application, the battery cell 10 undergoes expansion and contraction during charging and discharging, generating heat. The heat insulation component 30 can reduce heat transfer between adjacent battery cells 10, preventing heat concentration inside the module and thus avoiding performance degradation or safety issues caused by local overheating. Furthermore, in the event of thermal runaway, the heat insulation component 30 can slow the diffusion of heat to other battery cells 10, preventing the entire module or battery pack from entering an uncontrollable thermal runaway state. The conductive sheet 20 can deform along the length of the battery module, i.e., in the deformation direction of the battery cell 10. Thus, even when the battery cell 10 expands, the deformation portion 21 can effectively absorb and buffer the expansion deformation of the battery cell 10, reducing the risk of current interruption or short circuit caused by excessive stretching and breakage of the CCS component. This ensures reliable contact between the connection portion 22 and the terminal post 11, maintains good current conduction performance, and ensures the stability of the electrical connection, thereby improving the overall safety and structural stability of the battery module and extending its service life.

[0035] In some embodiments of this application, the deformable portion 21 has a straight plate structure, but its thickness is greater than that of the connecting portion 22. It can protrude upward or downward from the connecting portion 22, or protrude from both the upper and lower sides of the connecting portion 22 in the vertical direction. When the cell 10 expands, the deformable portion 21 will be stretched, making it thinner. The thickness is the length along the height direction of the battery module. In other embodiments of this application, the deformable portion 21 has a bent structure. The bent portion can protrude upward or downward from the connecting portion 22, or the bent portion can simultaneously protrude both upward and downward from the connecting portion 22. When the cell 10 expands, the deformable portion 21 will be stretched, making it flat.

[0036] In this application, the conductive sheet 20 is electrically connected to the positive and negative terminals of the adjacent cell 10 at both ends along the length of the battery module. When the adjacent cell 10 expands, the conductive sheet 20 is pulled by the terminals 11, causing it to deform along the direction of expansion of the cell 10, which is the length of the battery module. The deformation portion 21 absorbs the expansion deformation of the cell 10 to ensure the stability of the electrical connection between the CCS module and the cell 10.

[0037] Specifically, the connection between the deformable part 21 and the connecting part 22 along the length of the battery module has rounded corners, which can reduce stress concentration on the conductive sheet 20 and ensure that the conductive sheet 20 is subjected to more uniform force.

[0038] like Figure 3As shown, the conductive sheet 20 is integrally formed, with two openings at each end. Each opening corresponds to a terminal post of an adjacent battery cell 10, allowing for precise positioning of the conductive sheet 20 and improving the ease and accuracy of assembly. The conductive sheet 20 is welded to the terminal post 11 via these openings using a battery busbar laser welding process, integrating the conductive sheet 20 with the terminal post of the battery cell 10. This enables stable series connection between adjacent battery cells 10. Furthermore, this design simplifies the manufacturing process of the conductive sheet 20 and reduces its production cost.

[0039] Furthermore, at least a portion of the deformable portion 21 protrudes from the connecting portion 22 along the height direction of the battery module. A gap exists between the deformable portion 21 and the cell 10 along the height direction of the battery module. When the cell 10 expands and deforms, the deformable portion 21 is stretched, causing the gap to decrease or increase. This gap between the deformable portion 21 and the cell 10 means that the structure of the deformable portion 21 is not a straight plate structure, but rather its height varies in the vertical direction. This increases the deformability of the deformable portion 21, thereby increasing the expansion and deformation absorption capacity of the conductive sheet 20 and improving the stability of the CCS module. Simultaneously, the gap also facilitates the circulation of hot air, accelerates heat dissipation, further optimizes the thermal management of the battery module, reduces the risk of thermal runaway, and improves the safety and efficiency of the battery module.

[0040] Specifically, when the deformable part 21 protrudes downward from the connecting part 22 and the cell 10 expands and deforms, the deformable part 21 is stretched, causing the gap to increase. When the deformable part 21 protrudes upward from the connecting part 22 and the cell 10 expands and deforms, the deformable part 21 is stretched, causing the gap to decrease.

[0041] In this embodiment, the specific structure of the deformable part 21 is not limited, and it can be set as a wave structure, a semi-circular structure, a rectangular structure or other irregular structure, etc.

[0042] like Figure 2 As shown, the extension direction of the deformation part 21 is perpendicular to the length direction of the battery module. Two adjacent cells 10 have a gap along the length direction of the battery module. The deformation part 21 is positioned corresponding to this gap, and its vertical projection covers the gap. This arrangement allows the deformation part 21 to be located in the middle of the conductive sheet 20. When the electrode post 11 pulls on the conductive sheet 20, the deformation part 21 can more evenly distribute the pressure from the cells 10 on both sides, making the overall stress on the conductive sheet 20 more uniform. This reduces the risk of the conductive sheet 20 bearing excessive stress at a single point, preventing local deformation or breakage of the conductive sheet 20, and ensuring the structural integrity and electrical connection stability of the conductive sheet 20.

[0043] like Figure 3 and Figure 4As shown, the deformable portion 21 includes a middle section 211 and two transition sections 212. The two transition sections 212 are located at both ends of the middle section 211 along the length of the battery module. The transition sections 212 are disposed between the middle section 211 and the connecting portion 22, and at least one of the transition sections 212 is inclined from one connecting portion 22 toward the other connecting portion 22. The middle section 211 and the two transition sections 212 form a trapezoidal structure with an open bottom edge around the deformable portion 21. Since the transition sections 212 are inclined, this increases the length of the deformable portion 21 in the length direction of the battery module, increases the deformability of the deformable portion 21, and at the same time, compared with other shapes such as rectangles or circles, it can also reduce the height of the deformable portion 21 in the vertical direction to a certain extent, thereby reducing the space occupied by the conductive sheet 20 in the vertical direction, improving the space utilization rate inside the battery module, thereby increasing the number of cells or optimizing the cell layout to improve the overall energy density of the module.

[0044] In this embodiment, the middle section 211 is located above the connecting part 22, and the two transition sections 212 are inclined from one of the connecting parts 22 toward the other connecting part 22. This allows the conductive sheet 20 to have a longer deformation length and also reduces the height of the deformation part 21.

[0045] The connection between the middle section 211 and the two transition sections 212 is rounded to avoid stress concentration.

[0046] like Figure 2 and Figure 5 As shown, the heat insulation component 30 includes a heat insulation layer 31 and a mounting portion. The mounting portion has an internal cavity, and at least a portion of the heat insulation layer 31 is located within the cavity. The mounting portion is positioned between the heat insulation layer 31 and the battery cell 10. The presence of the mounting portion not only provides a fixing point for the heat insulation layer 31 but also increases the direct contact area between the battery cell 10 and the heat insulation component 30. This improves structural stability, reduces displacement or damage to the heat insulation layer 31 caused by expansion or vibration of the battery cell 10, and ensures the heat insulation effect and electrical connection safety during long-term use. Furthermore, placing a portion of the heat insulation layer 31 within the cavity of the mounting portion saves lateral space in the battery module, improving space utilization. This design makes the internal layout of the battery module more compact, contributing to an increase in the overall energy density of the battery pack. Simultaneously, the layered design and internal cavity of the heat insulation component 30 allow the heat insulation layer 31 to be pre-installed within the cavity of the mounting portion during assembly, and then the entire heat insulation component 30 is installed as a unit between adjacent battery cells 10. This modular assembly method simplifies the battery module assembly process, reduces assembly difficulty, and improves production efficiency.

[0047] Among them, the heat insulation layer 31 can be other heat insulation materials such as aerogel felt, nanoporous material or heat insulation cotton.

[0048] like Figure 5 As shown, the mounting section includes two silicone layers 32, which are located on both sides of the heat insulation layer 31 along the length of the battery module. Each silicone layer 32 has a corresponding mounting groove 322 on the side facing the heat insulation layer 31, with a portion of the heat insulation layer 31 located within the mounting groove 322. The mounting grooves 322 of the two silicone layers 32 cooperate to form a receiving cavity. During the stacking of the battery modules, certain assembly tolerances inevitably arise due to dimensional fluctuations in the manufacturing of the battery cells 10, limitations in the processing precision of the internal structural components of the module, and operational errors during assembly. The mounting section uses elastic silicone material, which can effectively fill the gaps or mismatches caused by these tolerances, compensate for dimensional differences, ensure a tight assembly between the battery cells 10 and the module structural components, and avoid poor electrical connections or mechanical instability caused by tolerances. Simultaneously, the silicone layer 32 can alleviate the stress generated during the stacking of the battery cells 10, especially during the assembly and use of the module, where the battery cells 10 may experience stress due to external impacts or internal thermal expansion and contraction. The high elasticity of silicone can absorb these stresses, preventing direct contact between the battery cell 10 and the heat insulation layer 31 from causing compression and damage to the heat insulation layer 31, thus extending the service life of the heat insulation component 30. Through the cooperation between the silicone layer 32 and the heat insulation layer 31, the heat insulation component 30 can be used to absorb assembly tolerances during battery module stacking and reduce heat transfer between the battery cells 10.

[0049] The silicone layer 32 has a compression deformation of ≥20% and a thickness of 1mm-4mm, ensuring that the thickness of the compressed material equals the designed spacing of the battery cells 10. The mounting groove 322 does not penetrate the silicone layer 32; it is only machined on the side of the silicone layer 32 facing the heat insulation layer 31. The compression deformation and thickness of the silicone layer 32 can be adjusted according to different application requirements.

[0050] In this application, the CCS assembly also includes a data acquisition harness located above and electrically connected to the conductive sheet 20. The data acquisition harness contains multiple data acquisition modules for acquiring the operating parameters of the battery cell 10. Integrating the data acquisition harness with the conductive sheet 20 not only simplifies the internal structure of the battery module but also effectively saves space. This design avoids the extra space required for separate wiring of traditional harnesses, making the battery module layout more compact and improving the space utilization within the battery pack. This allows for the accommodation of more battery cells 10 or the achievement of more efficient thermal management.

[0051] Specifically, the data acquisition module can be a temperature acquisition module, a pressure acquisition module, etc. The acquisition harness is electrically connected to the battery management system in the battery pack, transmitting the monitored information to the battery management system to monitor and protect the operating status of the battery module.

[0052] Furthermore, the battery module also includes a steel strip 40 and two end plates 50, which are spaced apart along the length of the battery module. Multiple battery cells 10 are arranged sequentially between the two end plates 50. The steel strip 40 extends in the same direction as the length of the battery module and is fitted over the two end plates 50 and the battery cells 10. The combination of the steel strip 40 and the two end plates 50 provides a rigid external frame for the battery module, resisting external impacts and deformation caused by the expansion of the internal battery cells 10, reducing displacement of the battery cells 10 during operation, and ensuring relative positional stability between the battery cells 10 and between the battery cells 10 and other structural components. This improves the structural strength and durability of the entire battery module.

[0053] like Figure 2 As shown, the battery module also includes an insulating sheet 60, which is disposed between the conductive sheet 20 and the battery cell 10. The insulating sheet 60 provides electrical isolation between the conductive sheet 20 and the battery cell 10, preventing direct contact between them, avoiding short circuits or arcing, ensuring electrical safety within the battery module, and ensuring accurate voltage and current acquisition signals for each battery cell 10. Along the length of the battery module, the insulating sheet 60 has multiple through holes spaced at both ends along the width of the battery module. These through holes correspond one-to-one with multiple terminals 11. The ends of the terminals 11 furthest from the battery cell 10 pass through the through holes and are electrically connected to the conductive sheet 20. The through holes ensure the insulating effect of the insulating sheet 60 without affecting the electrical connection between the terminals 11 and the conductive sheet 20.

[0054] Furthermore, the insulating sheet 60 is provided with multiple first openings at intervals along the length of the battery module, and each of the multiple first openings corresponds to an explosion-proof valve 90 on a multiple battery cell 10. The first openings can avoid interfering with or covering the explosion-proof valve 90, thus preventing any impact on the normal venting of the explosion-proof valve 90 and ensuring the normal operation of the battery cell 10.

[0055] like Figure 2 As shown, the battery module also includes foam 70, which is disposed between the battery cell 10 and the insulating sheet 60, and between the two terminals 11 of the battery cell 10, i.e., between the positive and negative terminals of the battery cell 10. Because the terminals 11 are higher than the battery cell 10, foam 70 is placed between the two terminals 11 of the battery cell 10. Foam 70 can fill the gap between the part of the battery cell 10 outside the terminals 11 and the insulating sheet 60, so that the insulating sheet 60 is laid flat on top of the battery cell 10, thereby ensuring the flatness of the CCS module during assembly. The height of foam 70 is the same as the height of the terminals 11.

[0056] The foam 70 is also provided with multiple second ports at intervals along the length of the battery module. Each of the multiple second ports is respectively set to correspond one-to-one with the explosion-proof valve 90 on the multiple battery cells 10. The multiple second ports are also set to correspond one-to-one with the multiple first ports, so as to avoid the explosion-proof valve 90 at the same time.

[0057] In this application, the foam 70 is coated with adhesive on both sides. The top of the foam 70 is bonded to the insulating sheet 60, and the bottom of the foam 70 is bonded to the battery cell 10. The foam 70 has a strip-shaped structure, and its extension direction is the same as that of the battery module. Furthermore, the length of the foam 70 is the same as the length of the insulating sheet 60. This facilitates the processing of the foam 70, allowing it to be directly processed into a single structure, and it is easy to assemble and disassemble. It also improves the stability of the connection between the foam 70, the insulating sheet 60, and the battery cell 10.

[0058] like Figure 2 As shown, each end of the battery module is provided with a connector 80. The connector 80 serves as the main electrode of the battery module, and adjacent battery modules are electrically connected through the connector 80.

[0059] According to another embodiment of this application, a battery pack is provided, which includes a housing and multiple battery modules. The housing has a mounting cavity, and the multiple battery modules are disposed within the mounting cavity. The battery modules are those described above. The aforementioned battery modules effectively solve the problem in the prior art where, when the heat insulation effect of the heat insulation pad of the battery module weakens, the expanded battery cells still pull on the aluminum busbars, easily leading to electrical accidents. The battery pack with the aforementioned battery modules also has the above advantages.

[0060] As can be seen from the above description, the embodiments of this application achieve the following technical effects:

[0061] 1. The conductive sheet is designed with a deformation part: it can effectively absorb the expansion and deformation of the battery module under high energy density working conditions. At the same time, the structure of the conductive sheet is simple, which simplifies the processing technology of the conductive sheet and reduces the manufacturing cost.

[0062] 2. Heat insulation pads are filled between battery cells: The elastic design of the silicone layer can absorb the assembly deviation caused by manufacturing tolerances, cell expansion or thermal expansion and contraction during the battery module stacking process, ensuring the stability of the cell position under various working conditions. The heat insulation layer effectively isolates the heat transfer between the cells, reduces heat diffusion, maintains the temperature stability of the cells, and reduces the risk of thermal runaway.

[0063] 3. Integrated CCS module: It integrates voltage and temperature acquisition points, improving the integration efficiency of the battery pack.

[0064] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0065] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0066] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0067] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery module, characterized in that, The battery module includes: Multiple battery cells (10) are arranged sequentially along the length of the battery module, and each battery cell (10) has a terminal post (11) at its top. A CCS assembly is disposed above the battery cell (10). The CCS assembly includes multiple conductive sheets (20). The two ends of the conductive sheets (20) are electrically connected to the terminals (11) of two adjacent battery cells (10). The conductive sheets (20) have interconnected deformable portions (21) and two connecting portions (22) along the length direction of the battery module. The two connecting portions (22) are connected to the terminals (11) of two adjacent battery cells (10). The deformable portions (21) protrude upward and / or downward from the connecting portions (22). The conductive sheets (20) can generate deformation along the length direction of the battery module to absorb the expansion deformation of the two adjacent battery cells (10). A heat insulation element (30) is disposed between two adjacent cells (10) to reduce heat transfer between the two adjacent cells (10).

2. The battery module according to claim 1, characterized in that, At least a portion of the deformable portion (21) protrudes from the connecting portion (22) along the height direction of the battery module. There is a gap between the deformable portion (21) and the battery cell (10). When the battery cell (10) expands and deforms, the gap becomes smaller or larger.

3. The battery module according to claim 2, characterized in that, The extension direction of the deformable part (21) is perpendicular to the length direction of the battery module. Two adjacent cells (10) have a gap along the length direction of the battery module. The deformable part (21) is arranged corresponding to the gap. The projection of the deformable part (21) along the vertical direction covers the gap.

4. The battery module according to claim 2, characterized in that, The deformable part (21) includes an intermediate section (211) and two transition sections (212). The two transition sections (212) are located at both ends of the intermediate section (211) along the length of the battery module. The transition sections (212) are disposed between the intermediate section (211) and the connecting part (22). At least one of the transition sections (212) is inclined from one of the connecting parts (22) toward the other connecting part (22).

5. The battery module according to claim 1, characterized in that, The heat insulation component (30) includes a heat insulation layer (31) and a mounting portion. The mounting portion has a receiving cavity inside, and at least a portion of the heat insulation layer (31) is located in the receiving cavity. The mounting portion is disposed between the heat insulation layer (31) and the battery cell (10).

6. The battery module according to claim 5, characterized in that, The mounting part includes two silicone layers (32), which are located on both sides of the heat insulation layer (31) along the length of the battery module. The silicone layer (32) facing the heat insulation layer (31) is provided with a mounting groove (322), and part of the heat insulation layer (31) is located in the mounting groove (322). The mounting grooves (322) of the two silicone layers (32) cooperate with each other to form the receiving cavity.

7. The battery module according to claim 1, characterized in that, The CCS component also includes a data acquisition harness located above the conductive sheet (20) and electrically connected to the conductive sheet (20). The data acquisition harness contains multiple data acquisition modules, which are used to acquire the operating parameters of the battery cell (10).

8. The battery module according to claim 1, characterized in that, The battery module also includes a steel strip (40) and two end plates (50), the two end plates (50) are respectively spaced apart along the length direction of the battery module, and a plurality of battery cells (10) are arranged sequentially between the two end plates (50); The steel strip (40) extends in the same direction as the length of the battery module, and the steel strip (40) is sleeved on the outside of the two end plates (50) and the battery cell (10).

9. The battery module according to any one of claims 1 to 8, characterized in that, The battery module also includes an insulating sheet (60), which is disposed between the conductive sheet (20) and the battery cell (10). Along the length of the battery module, the insulating sheet (60) has multiple through holes distributed at both ends along the width of the battery module. The multiple through holes are respectively disposed one-to-one with the multiple terminals (11). The end of the terminal (11) away from the battery cell (10) passes through the through hole and is electrically connected to the conductive sheet (20). The insulating sheet (60) is also provided with a plurality of first ports at intervals along the length direction of the battery module, and the plurality of first ports are respectively provided with explosion-proof valves (90) on the plurality of battery cells (10).

10. The battery module according to claim 9, characterized in that, The battery module also includes foam (70), which is disposed between the battery cell (10) and the insulating sheet (60) and located between the two terminals (11) of the battery cell (10); The foam (70) is also provided with a plurality of second ports at intervals along the length of the battery module, and the plurality of second ports are respectively provided with explosion-proof valves (90) on the plurality of battery cells (10).

11. A battery pack, characterized in that, The battery pack includes a housing and multiple battery modules. The housing has a mounting cavity, and the multiple battery modules are disposed in the mounting cavity. The battery modules are the battery modules described in any one of claims 1 to 10.

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