Conductive connecting bar, end plate assembly, battery and electric equipment

Abstract

The embodiment of the utility model provides a conductive connecting bar, an end plate assembly, a battery and electric equipment, and relates to the technical field of batteries. The conductive connecting bar comprises a first connecting part, a deformation part and a second connecting part, the first connecting part and the second connecting part are respectively connected to two sides of an elastic connecting part along a first direction, the first connecting part and the second connecting part are respectively suitable for being electrically connected with electrical parts of the battery, and the deformation part is suitable for being arranged on the end surface of a battery cell of the battery along the thickness direction of the battery cell. According to the conductive connection bar, the end plate assembly, the battery and the electric equipment provided by the embodiment of the invention, through the arrangement of the conductive connection bar, when the battery cell expands, the deformation part correspondingly deforms to absorb the expansion amount of the battery cell, so that the first connection part and the second connection part are electrically connected with the electrical part of the battery, and the occurrence of a contact breaking phenomenon is avoided.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of battery technology, and in particular to a conductive connecting bar, an end plate assembly, a battery, and an electrical device. Background Art

[0002] With the development of science and technology, more and more electrical equipment uses batteries as energy storage and supply devices, such as new energy vehicles, communication base stations, energy storage containers, etc.

[0003] The battery includes multiple battery cells arranged along the thickness direction. During long-term use, the large surface of the battery cell in the thickness direction is prone to generate a large expansion force. In some situations, the conductive bar of the battery needs to cross the large surface of the battery cell in the thickness direction. The conductive bar may be pushed open by the expansion force of the battery cell, causing the conductive bar to detach from the battery cell and cause contact failure, affecting normal use. Utility Model Content

[0004] In view of the above problems, an embodiment of the present application provides a conductive connecting bar, an end plate assembly, a battery and an electrical device. By setting a conductive connecting bar, when the battery cell expands, the deformation part will deform accordingly to absorb the expansion of the battery cell, so that the first connecting part and the second connecting part maintain electrical connection with the electrical components of the battery, avoiding the occurrence of disconnection.

[0005] In one aspect, an embodiment of the present application provides a conductive connecting bar for a battery, comprising:

[0006] A first connecting portion, a deformation portion and a second connecting portion, wherein the first connecting portion and the second connecting portion are respectively connected to both sides of the deformation portion along a first direction, the first connecting portion and the second connecting portion are respectively suitable for being electrically connected to the electrical components of the battery, and the deformation portion is suitable for being arranged on the end face of the battery cell along its own thickness direction.

[0007] When the battery cell expands due to internal chemical reactions or external environmental factors during use, the middle part of the battery cell will expand outward. At this time, the deformed part of the conductive connecting row will deform accordingly to absorb the expansion of the battery cell, so that the first connecting part and the second connecting part maintain electrical connection with the electrical components of the battery. The expansion of the battery cell will not destroy the electrical connection, thereby avoiding the occurrence of contact failure and ensuring the normal use of the battery.

[0008] In some possible implementations, the deformation portion includes: at least one tensile structure, wherein the tensile structure is configured to have a variable length along the first direction.

[0009] When the battery cell expands due to internal chemical reactions or external environmental factors, the tensile structure can stretch accordingly to absorb the length change caused by the expansion of the battery cell.

[0010] In some possible implementations, the stretching structure includes a main body segment and a deformation segment, the main body segment extends along the first direction, and both ends of the main body segment are connected to the deformation segment;

[0011] One end of the deformation segment is connected to the main body segment, and the other end extends obliquely relative to the main body segment. The two deformation segments are respectively connected to the first connecting portion and the second connecting portion.

[0012] When the battery cell expands, the outward force from the center of the cell acts on the conductive connector. The deformable section of the tensile structure is the first to experience this expansion force, elastically deforming and extending at an angle. Because the deformable section is connected to the main body, the main body also deforms to a certain degree. This deformation propagates along the length of the tensile structure, adapting to the cell's deformation and maintaining the stability of the connection between the first and second connecting parts and the cell.

[0013] In some possible implementations, there are multiple tensile structures, and the multiple tensile structures are relatively arranged along a second direction, and the second direction is perpendicular to the first direction;

[0014] One of the deformation segments of each of the tensile structures is connected to the first connection portion, and the other deformation segment of each of the tensile structures is connected to the second connection portion.

[0015] When the battery cell expands, the outward expansion force of the middle part of the battery cell will act evenly on the two tensile structures. The two tensile structures can feel the effect of this force at the same time and undergo elastic deformation through their respective deformation sections. The deformation will propagate along the length direction of the tensile structure, so that the length of the overall structure of the conductive connecting row is lengthened, achieving the stretching that adapts to the deformation of the battery cell and maintaining the stability of the connection between the first connecting part and the second connecting part and the battery cell.

[0016] In some possible implementations, the deformation sections of two adjacent tensile structures have opposite inclination directions.

[0017] When the battery cell expands, the stress is partially offset by tilting in opposite directions, thereby enhancing the stability of the entire conductive connection row in the thickness direction of the battery cell. In this way, the conductive connection row is prevented from being excessively deformed or broken under the action of the battery cell expansion force.

[0018] In some possible implementations, the conductive connection bar further includes: an elastic return member, wherein the elastic return member is disposed between the two stretching structures, and two ends of the elastic return member are respectively connected to the two stretching structures.

[0019] When the battery cell expands or the conductive connecting bar is subjected to external force, causing the tensile structure to deform, the elastic reset member can store energy and release the energy after the external force disappears, restoring the tensile structure to its original position, ensuring the reset ability of the conductive connecting bar and helping to maintain the structural stability of the battery.

[0020] In some possible implementations, the elastic return member includes an elastic segment and a fixed segment. There are two fixed segments, and the two fixed segments are respectively located at two ends of the elastic segment along the second direction and are fixedly connected to the corresponding tensile structure.

[0021] When the external force disappears, the wavy structure can quickly release the stored energy, allowing the elastic reset part to return to its original shape and realize the reset function; in addition, the wavy structure has good elastic properties and can maintain stable elasticity within a wide deformation range, ensuring the elastic strength of the elastic section.

[0022] In some possible implementations, the conductive connection bar includes a plurality of foil layers, and the plurality of foil layers are stacked in sequence along a thickness direction to form the deformation portion.

[0023] Multiple foil layers are stacked along the thickness direction, so that when the deformed part is subjected to the expansion force of the battery cell, the stress can be absorbed and dispersed through the relative movement and deformation of each layer of foil. This design increases the flexibility and elasticity of the deformed part, reduces the risk of fracture due to stress concentration, and extends the service life of the conductive connection bar.

[0024] In some possible implementations, the foil layer is an aluminum foil layer.

[0025] The foil layer can have good electrical conductivity, and also has good ductility and deformation ability, corrosion resistance and oxidation resistance, as well as light weight and easy processing, which improves the reliability of the conductive connection bar.

[0026] In some possible implementations, the first connecting portion includes: a first connecting side plate and a second connecting side plate;

[0027] The first connecting side plate is connected between the second connecting side plate and the deforming portion;

[0028] The second connecting side plate is arranged at an angle to the first connecting side plate, and the second connecting side plate is used to connect to the battery cell electrodes.

[0029] When the first connecting side plate can produce adaptive deformation in the first direction as the deforming part stretches, the second connecting side plate does not directly participate in the deformation. Therefore, a stable connection can still be ensured between the second connecting side plate and the battery cell electrode, ensuring the overall stability and safety of the battery.

[0030] On the other hand, an embodiment of the present application further provides an end plate assembly, comprising a mounting plate and a conductive connection bar according to any of the above possible implementations, wherein the mounting plate is adapted to be disposed on an end surface of the battery cell along its thickness direction;

[0031] The conductive connection bar is mounted on the mounting plate.

[0032] The mounting plate provides physical support for the battery cells, preventing them from moving or being damaged by external vibration or impact during operation. It also provides a mounting base for the conductive connectors, ensuring their stability and reliability within the battery. The mounting plate provides a common platform for the battery cells and conductive connectors, enabling a more compact and efficient battery design. Exemplarily, the mounting plate can be made of plastic.

[0033] In some possible implementations, the mounting plate is provided with a snap-fit ​​structure, and the snap-fit ​​structure is snap-fitted with the conductive connection row.

[0034] The snap-fit ​​structure securely fastens the conductive connector bar within the mounting slot through a physical snap-fit ​​mechanism, effectively preventing the conductive connector bar from being dislodged from the mounting slot due to vibration, impact, or other external forces, and improving the stability of the connection between the conductive connector bar and the mounting plate. For example, the snap-fit ​​structure can be a retaining buckle that secures the conductive connector bar in place when installed within the mounting slot.

[0035] In some possible implementations, a plurality of reinforcing ribs are provided on a side of the mounting plate facing the conductive connection bar.

[0036] The reinforcing ribs can effectively disperse and resist these stresses, prevent the mounting plate from bending or deforming, ensure the bearing capacity of the mounting plate, and improve the stability and safety of the battery.

[0037] In some possible implementations, a plurality of the reinforcing ribs are interconnected to form a honeycomb shape.

[0038] The honeycomb structure has efficient mechanical properties and strong stability. By designing the reinforcing ribs into a honeycomb shape, the mounting plate can more effectively disperse and resist the forces from the battery cells, conductive connection bars and the external environment. It can also evenly distribute the forces across the entire mounting plate, avoiding stress concentration and providing good rigid support for the mounting plate.

[0039] In some possible implementations, a mounting groove is provided on the mounting plate, and the conductive connection bar is embedded in the mounting groove.

[0040] The mounting slots strengthen the connection between the conductive connector bar and the mounting plate, improving the stability of the battery's overall structure. Furthermore, the mounting slots provide precise positioning for the conductive connector bar. During assembly, the conductive connector bar can be automatically aligned by being placed into the corresponding mounting slot, simplifying the assembly process and improving accuracy and efficiency.

[0041] In some possible implementations, a slot is provided on the mounting plate, the slot passes through the mounting plate along a first direction, and the slot is used to mount a wiring harness of the battery.

[0042] The card slot is set to fix and protect the wiring harness, prevent the wiring harness from being damaged by vibration, friction or other external forces, and ensure the orderliness of the battery structure.

[0043] On the other hand, an embodiment of the present application also provides a battery, comprising a plurality of battery cells arranged along the thickness direction of the battery cell, and a conductive connection row or end plate assembly in any of the above possible implementation methods, wherein the deformation portion is provided on the end face of the battery cell along the thickness direction of the battery cell.

[0044] When the battery cell expands due to internal chemical reactions or external environmental factors during use, the middle part of the battery cell will expand outward. At this time, the deformed part of the conductive connecting bar will undergo elastic deformation accordingly to absorb the expansion of the battery cell, so that the first connecting part and the second connecting part remain connected to the electrodes at both ends of the battery cell. The expansion of the battery cell will not cause the conductive connecting bar to be disconnected from the connection position of the battery cell, thereby avoiding the occurrence of contact failure. By setting the conductive connecting bar and the end plate assembly, the safety of battery use is guaranteed.

[0045] In some possible implementations, the battery cell includes a first end and a second end opposite to each other along a first direction, the first end and the second end are both provided with a first electrode and a second electrode with opposite polarities, the first electrode and the second electrode of a plurality of battery cells located at the same end are electrically connected in sequence to be connected in series, and the plurality of battery cells include a head-end battery cell and a tail-end battery cell;

[0046] There are two conductive connection bars, wherein the first connection portion and the second connection portion of one of the conductive connection bars are respectively connected to the first electrodes at both ends of the first-end battery cell, and the first connection portion and the second connection portion of the other conductive connection bar are respectively connected to the second electrodes at both ends of the terminal battery cell.

[0047] The two first electrodes at both ends of the first-end battery cell are connected by a conductive connecting bar to realize the series connection between the positive electrodes of the first-end battery cell, forming a positive electrode output end. The two second electrodes at both ends of the terminal battery cell are connected by another conductive connecting bar to realize the series connection between the negative electrodes of the terminal battery cell, forming a negative electrode output end. This series structure increases the total voltage of the battery.

[0048] In some possible implementations, the battery further includes an aerogel layer, the conductive connecting bar is mounted on a side of the mounting plate facing away from the battery cell, and the aerogel layer is provided between the battery cell and the mounting plate.

[0049] Aerogel is a lightweight, nanoporous material with extremely low thermal conductivity, resulting in excellent thermal insulation properties. In batteries, aerogel can effectively isolate the heat conduction of the battery cell, preventing heat accumulation and overheating, thereby improving battery safety.

[0050] In some possible implementations, the battery further includes: a connector, wherein the multiple battery cells are provided with multiple connectors at both ends along the first direction, and the first electrode and the second electrode at the same end of two adjacent battery cells are electrically connected through the connector.

[0051] The connectors allow current to flow through each cell sequentially, increasing the overall voltage and capacity of the battery module. Multiple connectors secure the cells together, preventing them from shifting or misaligning within the battery and ensuring overall battery stability.

[0052] On the other hand, an embodiment of the present application further provides an electrical device, comprising a battery in any of the possible implementations described above.

[0053] By providing a conductive connecting bar, the expansion of the battery cell will not cause disconnection at the connection position between the conductive connecting bar and the electrical components of the battery, thereby avoiding the occurrence of contact failure, ensuring the normal use of the battery, and better powering electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0055] Figure 1 A schematic structural diagram of a battery according to an embodiment of the present application;

[0056] Figure 2 An exploded view of a battery according to an embodiment of the present application;

[0057] Figure 3 for Figure 2 Schematic diagram of the structure of the conductive connecting bar;

[0058] Figure 4 for Figure 1Schematic diagram of the structure of the middle connecting piece;

[0059] Figure 5 for Figure 1 A schematic structural diagram of the middle mounting plate from one perspective;

[0060] Figure 6 for Figure 1 A structural diagram of the middle mounting plate from another perspective;

[0061] Figure 7 for Figure 2 Schematic diagram of the structure of the conductive connection bar from another perspective.

[0062] Description of reference numerals:

[0063] 100-battery cell; 100a-first electrode; 100b-second electrode; 100A-first end battery cell; 100B-last end battery cell;

[0064] 200 - conductive connection bar; 210 - first connection portion; 211 - first connection side plate; 212 - second connection side plate; 220 - second connection portion; 230 - deformation portion; 230a - tensile structure; 231 - main body section; 232 - deformation section;

[0065] 300-connecting piece; 310-first side portion; 320-second side portion; 330-third side portion;

[0066] 400-mounting plate; 410-mounting slot; 420-clamping structure; 430-reinforcement rib; 440-cage;

[0067] 500-elastic reset member; 510-elastic section; 520-fixed section;

[0068] 600-fixing parts;

[0069] 700-Connector. DETAILED DESCRIPTION

[0070] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0071] With the development of science and technology, more and more electrical devices are using batteries as energy storage and supply devices, such as new energy vehicles, communication base stations, and energy storage containers. Among them, blade batteries have been widely used due to their high energy density, high safety, and long life.

[0072] The battery includes multiple battery cells arranged along the thickness direction. During long-term use, the large surface of the battery cell in the thickness direction is prone to generate a large expansion force. In some situations, the conductive bar of the battery needs to cross the large surface of the battery cell in the thickness direction. The conductive bar may be pushed open by the expansion force of the battery cell, causing the conductive bar to detach from the connection position with the electrical components of the battery, resulting in a disconnection and affecting normal use.

[0073] In view of this, an embodiment of the present application provides a conductive connecting bar, an end plate assembly, a battery and an electrical device. By setting up a conductive connecting bar, when the battery cell expands due to internal chemical reactions or external environmental factors during use, the middle part of the battery cell will expand outward. At this time, the deformation part of the conductive connecting bar will deform accordingly to absorb the expansion of the battery cell, so that the first connection part and the second connection part remain electrically connected to the electrical components of the battery. The expansion of the battery cell will not cause the conductive connecting bar to be disconnected at the connection position with the electrical components of the battery, thereby avoiding the occurrence of contact failure.

[0074] The following combination Figure 1-Figure 7 The conductive connection bar provided in the embodiment of the present application is described in detail.

[0075] In the figure, x is the first direction, z is the second direction, and y is the third direction.

[0076] The conductive connection bar 200 provided in this embodiment is used for a battery. Figure 1 、 Figure 2 and Figure 3 The conductive connection bar 200 includes a first connection portion 210, a deformable portion 230, and a second connection portion 220. The first connection portion 210 and the second connection portion 220 are respectively connected to both sides of the deformable portion 230 along the first direction. The first connection portion 210 and the second connection portion 220 are respectively suitable for electrically connecting to the electrical components of the battery.

[0077] Optionally, the electrical component may be an electrode lead-out component or a pole of the battery cell 100. For example, the first connecting portion 210 and the second connecting portion 220 are respectively connected to the positive electrodes at both ends of the battery cell 100, or the first connecting portion 210 and the second connecting portion 220 are respectively connected to the negative electrodes at both ends of the battery cell 100.

[0078] Optionally, the deformation portion 230 may undergo elastic deformation or flexibly deformation. In some other embodiments, the deformation portion 230 may also undergo plastic deformation.

[0079] The deformation portion 230 is the core part of the deformation of the conductive connecting bar 200, and is suitable for being arranged on the end face of the battery cell 100 along its own thickness direction. This design allows the conductive connecting bar 200 to adapt to the change in the length of the battery cell 100 by deformation during the expansion process of the battery cell 100, thereby maintaining a tight connection between the conductive connecting bar 200 and the battery cell 100.

[0080] Specifically, when the battery cell 100 expands due to internal chemical reactions or external environmental factors during use, the middle part of the battery cell 100 will expand outward. At this time, the deformation part 230 of the conductive connecting bar 200 will deform accordingly to absorb the expansion of the battery cell 100, so that the first connecting part 210 and the second connecting part 220 remain connected to the electrodes at both ends of the battery cell 100. The expansion of the battery cell 100 will not cause the conductive connecting bar 200 to be disconnected at the connection position with the battery cell 100, thereby avoiding the occurrence of contact failure and ensuring the normal use of the battery.

[0081] Optionally, an insulating layer may be provided on the outside of the conductive connecting bar 200. The insulating layer is coated on the insulating connecting bar via a hot pressing process. Specifically, the insulating connecting bar and the insulating material are bonded together by heating and applying pressure to improve the insulating performance of the insulating connecting bar. It should be noted that conductive materials, corrosion-resistant materials, etc. can be coated on the conductive connecting bar 200 via the hot pressing process. The specific material can be selected according to actual needs and is not limited here.

[0082] In some embodiments, reference Figure 2 and Figure 3 The deformation portion 230 includes at least one tensile structure 230a. The tensile structure 230a is constructed to have a variable length along the first direction. When the battery cell 100 expands due to internal chemical reactions or external environmental factors, the tensile structure 230a can stretch accordingly to absorb the length change caused by the expansion of the battery cell 100. Specifically, the tensile structure 230a needs to be made of a material with good elasticity and toughness, or a mechanical structure that can achieve length adjustability. The specific material and structural form can be selected according to actual needs. It should be noted that any material or structure that can achieve deformation to adapt to or absorb the expansion of the battery cell 100 is within the scope of protection of this application and is not limited here.

[0083] In some embodiments, reference Figure 3The tensile structure 230a includes a main body section 231 and a deformation section 232. The main body section 231 extends along the first direction. The main body section 231 ensures the installation stability of the entire tensile structure 230a. At the same time, the main body section 231 is also the basis for connecting the deformation section 232. Both ends of the main body section 231 are connected to the deformation section 232. One end of the deformation section 232 is connected to the main body section 231, and the other end extends obliquely relative to the main body section 231 and is connected to the first connecting part 210 or the second connecting part 220. The inclined extension design enables the deformation section 232 to be more easily elastically deformed when subjected to external force. The other ends of the two deformation sections 232 are respectively connected to the first connecting part 210 and the second connecting part 220, ensuring that when the battery cell 100 expands, the deformation of the tensile structure 230a can be transmitted to the first connecting part 210 and the second connecting part 220. The first connecting part 210 and the second connecting part 220 ensure the strength and stability of the tensile structure 230a.

[0084] When the battery cell 100 expands, the outward expansion force from the center of the battery cell 100 acts on the conductive connecting bar 200. At this point, the deformable section 232 of the tensile structure 230a is first affected by this expansion force and undergoes elastic deformation, extending at an angle. Because the deformable section 232 is connected to the main section 231, the main section 231 also deforms to a certain extent. This deformation propagates along the length of the tensile structure 230a, allowing the structure to stretch to accommodate the deformation of the battery cell 100, thereby maintaining the stability of the connection between the first and second connecting sections 210, 220, and the battery cell 100.

[0085] In some embodiments, reference Figure 3 There are multiple tensile structures 230a, and the multiple tensile structures 230a are arranged relatively along a second direction (for example, the z direction), and the second direction is perpendicular to the first direction. In this way, the two tensile structures 230a can simultaneously withstand the force generated when the battery cell 100 expands, disperse the stress, and further improve the operating stability of the conductive connection bar 200. One of the deformation sections 232 of each tensile structure 230a is connected to the first connection part 210, and the other deformation section 232 of each tensile structure 230a is connected to the second connection part 220. In this way, it is ensured that when the battery cell 100 expands, the two tensile structures 230a can work together to jointly adjust the distance between the first connection part 210 and the second connection part 220.

[0086] When the battery cell 100 expands, the outward expansion force of the middle part of the battery cell 100 will act evenly on the two tensile structures 230a. The two tensile structures 230a can feel the action of this force at the same time and undergo elastic deformation through their respective deformation sections 232. The deformation will propagate along the length direction of the tensile structure 230a, so that the length of the overall structure of the conductive connecting bar 200 is lengthened, thereby achieving the stretching that adapts to the deformation of the battery cell 100 and maintaining the stability of the connection between the first connecting part 210 and the second connecting part 220 and the battery cell 100.

[0087] Further, refer to Figure 3 The two tensile structures 230a form a stable middle frame structure. When the battery cell 100 expands, the middle area of ​​the battery cell 100 is often the area with the most serious bulging. The middle frame structure avoids the expanded middle section of the battery cell 100, avoids excessive deformation of the conductive connection bar 200, and extends the service life of the conductive connection bar 200.

[0088] In some embodiments, reference Figure 2 The deformation sections of two adjacent tensile structures tilt in opposite directions. This creates a mutually supporting structure. When the battery cell 100 expands, the oppositely tilted deformations partially offset the stress, thereby enhancing the stability of the entire conductive connecting bar 200 in the thickness direction of the battery cell 100. This prevents the conductive connecting bar 200 from excessive deformation or breakage due to the expansion force of the battery cell 100.

[0089] In addition, the design of the deformation sections with opposite tilt directions enables the conductive connecting bar 200 to evenly disperse stress when bearing the expansion force of the battery cell 100, thereby reducing stress concentration and improving the durability and service life of the conductive connecting bar 200.

[0090] In some embodiments, reference Figure 2 and Figure 6 The battery also includes an elastic return member 500, which is arranged between the two tensile structures 230a. The two ends of the elastic return member 500 are connected to the two tensile structures 230a respectively. The elastic return member 500 provides elastic support between the two tensile structures 230a, ensuring that the two tensile structures 230a can move relative to each other within a certain range while maintaining a stable connection.

[0091] Specifically, when the battery cell 100 expands or the conductive connecting bar 200 is subjected to external force, causing the tensile structure 230a to deform, the elastic reset member 500 can store energy and release the energy after the external force disappears, so that the tensile structure 230a returns to its original position, ensuring the reset ability of the conductive connecting bar 200 and helping to maintain the structural stability of the battery.

[0092] For example, the elastic return member 500 can be made of an elastic material such as spring steel, rubber, or silicone. The specific material can be selected based on the specific requirements of the battery and the operating environment, and is not limited here. Furthermore, for example, the elastic return member 500 can be constructed in various forms such as a coil spring, a leaf spring, or a rubber pad. The specific material can be designed based on the specific requirements of the battery and the operating environment, and is not limited here.

[0093] In some embodiments, reference Figure 6 The elastic return member 500 includes an elastic section 510 and a fixed section 520. There are two fixed sections 520, which are respectively located at the two ends of the elastic section 510 along the second direction and are fixedly connected to the corresponding tensile structure 230a. The elastic section 510 is wavy. The wavy structure enables the elastic return member 500 to be more easily elastically deformed and store energy when subjected to external force. When the external force disappears, the wavy structure can quickly release the stored energy, so that the elastic return member 500 returns to its original shape, thereby realizing the reset function. In addition, the wavy structure has good elastic properties and can maintain stable elasticity within a wider deformation range, thereby ensuring the elastic strength of the elastic section 510.

[0094] In some embodiments, reference Figure 6 The elastic section 510 is fixed on the mounting plate 400. The fixing position of the elastic section 510 is the middle of the mounting plate 400. For example, the fixing method can be bolts, rivets, welding, etc. In one example, referring to Figure 6 A fixing member 600 may be provided between the elastic section 510 and the mounting plate 400. The fixing member 600 may be a bolt. Matching threads are provided on the elastic section 510 and the mounting plate 400. The connection and fixation between the elastic section 510 and the mounting plate 400 are achieved through threaded matching.

[0095] In this way, when the conductive connection bar 200 is subjected to external force, the elastic segment 510 can play the role of elastic reset, so that the tensile structure 230a remains in the appropriate position, and at the same time, the elastic reset member 500, the mounting plate 400, and the conductive connection bar 200 are fixed together, thereby jointly suppressing the expansion of the battery cell 100.

[0096] In some embodiments, reference Figure 1 、 Figure 2 and Figure 7The conductive connection bar 200 includes multiple foil layers stacked sequentially along the thickness direction to form a deformed portion 230. This stacking of multiple foil layers along the thickness direction allows the deformed portion 230 to absorb and disperse stress when subjected to expansion force from the battery cell 100 through relative movement and deformation of the foil layers. This design increases the flexibility and elasticity of the deformed portion 230, reduces the risk of fracture due to stress concentration, and extends the service life of the conductive connection bar 200.

[0097] In addition, multiple foil layers are stacked to form multiple conductive paths. If one layer of foil breaks or has poor contact for some reason, the other layers of foil can still maintain conductive connection, ensuring the conductive performance and stability of the entire conductive connection bar 200.

[0098] In some embodiments, reference Figure 7 The foil layer is an aluminum foil layer. This allows the foil layer to have good electrical conductivity, as well as good ductility and deformation capacity, corrosion resistance and oxidation resistance, as well as light weight and easy processing, thereby improving the reliability of the conductive connecting bar 200.

[0099] In some embodiments, reference Figure 3 The first connecting portion 210 includes a first connecting side plate 211 and a second connecting side plate 212. The first connecting side plate 211 is connected between the second connecting side plate 212 and the deformation portion 230. The second connecting side plate 212 is set at an angle to the first connecting side plate 211. Optionally, the second connecting side plate 212 is perpendicular to the first connecting side plate 211. The second connecting side plate 212 is used to connect to the electrode of the battery cell 100. The third direction is perpendicular to the first direction. In this way, the first connecting side plate 211 and the second connecting side plate 212 form an L-shaped structure. When the first connecting side plate 211 can produce adaptive deformation in the first direction as the deformation portion 230 stretches, the second connecting side plate 212 does not directly participate in the deformation. Therefore, the second connecting side plate 212 and the electrode of the battery cell 100 can still be firmly connected, ensuring the overall stability and safety of the battery.

[0100] Exemplarily, the connection method between the second connecting side plate 212 and the battery cell 100 can be welding. A welding positioning hole is provided on the second connecting side plate 212. Before performing the welding operation, the relative position between the second connecting side plate 212 and the battery cell 100 is determined through the welding positioning hole to improve the accuracy of the welding position.

[0101] In some embodiments, reference Figure 3 and Figure 4The second connecting portion 220 includes an extension portion extending beyond the second end of the battery cell 100 along the first direction. The conductive connecting row 200 also includes a connecting piece 300. The connecting piece 300 includes a first side portion 310, a second side portion 320 and a third side portion 330. The first side portion 310, the second side portion 320 and the third side portion 330 are perpendicular to each other. The first side portion 310 is connected to the electrode at the second end of the battery cell 100, ensuring that the electric energy of the battery cell 100 can be transmitted to the connecting piece 300. The second side portion 320 is connected to the extension portion, ensuring that the connecting piece 300 is firmly fixed on the battery and can transmit the electric energy of the battery cell 100 to the external circuit or other battery components through the second connecting portion 220. The third side portion 330 is connected to the external circuit, realizing the electrical connection between the battery and external equipment. The design of the first side portion 310, the second side portion 320 and the third side portion 330 of the connecting piece 300 being perpendicular to each other enables the connecting piece 300 to simultaneously achieve multi-dimensional connections within a limited space, thereby improving the connection density and electrical transmission efficiency of the battery module.

[0102] Exemplarily, the connection between the connecting piece 300 and the conductive connecting bar 200 and the battery cell 100 is achieved by welding. Multiple welding positioning holes are defined on the connecting piece 300. Prior to welding, the welding positioning holes are used to determine the relative positions of the connecting pieces, thereby improving the accuracy of the welding positions. Alternatively, the connection method may be bolted, riveted, or the like, depending on actual needs and is not limited here.

[0103] In some embodiments, the conductive connecting bar 200 may be an aluminum bar. Due to its material properties, the aluminum bar can withstand deformation to a certain extent without breaking or failing. In a battery, since the battery cells 100 will expand and deform during the charging and discharging process, the conductive connecting bar 200 is set as an aluminum bar. The deformation of the aluminum bar allows it to effectively absorb and relieve these stresses. This ensures that the expansion of the battery cells 100 does not cause the conductive connecting bar 200 to disconnect at the connection point with the battery cells 100, thereby avoiding the occurrence of contact failure.

[0104] Furthermore, using aluminum as the conductive connecting bar 200 enables electrical transmission between the battery and external circuits or between adjacent cells 100, ensuring proper battery operation. Furthermore, aluminum has a lower density than other conductive materials, such as copper. Therefore, using aluminum can reduce the overall weight of the battery. Furthermore, aluminum is a relatively common and abundant metal, making it relatively inexpensive, which can reduce battery production costs.

[0105] In addition, an embodiment of the present application also provides an end plate assembly, including a mounting plate and a conductive connection bar 200 in any of the above embodiments, wherein the mounting plate is suitable for being arranged on the end surface of the battery cell 100 along its own thickness direction (for example, the third direction, i.e., the y direction); the conductive connection bar 200 is installed on the mounting plate.

[0106] The mounting plate 400 provides physical support for the battery cells 100, preventing them from moving or being damaged by external vibration or impact during operation. It also provides a mounting base for the conductive connector bars 200, ensuring their stability and reliability within the battery. The mounting plate 400 provides a common platform for the battery cells 100 and conductive connector bars 200, making the battery design more compact and efficient. For example, the mounting plate 400 can be made of plastic.

[0107] It should be noted that the mounting plate 400 may also be equipped with temperature sensors, heat sinks and other components to assist in battery operation, and the specific configuration may be determined based on actual needs.

[0108] In some embodiments, reference Figure 5 and Figure 6 The edge of the mounting slot 410 is provided with a snap-fit ​​structure 420 that snaps into engagement with the conductive connection bar 200. The snap-fit ​​structure 420 securely secures the conductive connection bar 200 within the mounting slot 410 through a physical snap-fit ​​mechanism, effectively preventing the conductive connection bar 200 from being dislodged from the mounting slot 410 due to vibration, impact, or other external forces, thereby improving the connection stability between the conductive connection bar 200 and the mounting plate 400. Exemplarily, the snap-fit ​​structure 420 can be a fixed buckle that, when the conductive connection bar 200 is installed within the mounting slot 410, limits the position of the conductive connection bar 200.

[0109] In some embodiments, see Figure 5 As shown, a plurality of reinforcing ribs 430 are provided on the side of the mounting plate 400 facing the conductive connection bar 200 to enhance the strength of the mounting plate 400. During battery operation, the battery may be subjected to stresses such as expansion force from the battery cells 100, external impact, or vibration. The reinforcing ribs 430 effectively disperse and resist these stresses, preventing the mounting plate 400 from bending or deforming, ensuring the load-bearing capacity of the mounting plate 400 and improving the stability and safety of the battery.

[0110] In some embodiments, reference Figure 2 and Figure 5 Multiple reinforcing ribs 430 are interconnected to form a honeycomb structure. The honeycomb structure has high mechanical properties and strong stability. By designing the reinforcing ribs 430 into a honeycomb shape, the mounting plate 400 can more effectively disperse and resist the forces applied by the battery cells 100, the conductive connecting bars 200, and the external environment. It can also evenly distribute the forces across the entire mounting plate 400, avoiding stress concentration and providing good rigid support for the mounting plate 400.

[0111] In some embodiments, reference Figure 5 and Figure 6Mounting plate 400 is provided with mounting slots 410, into which conductive connector bar 200 is embedded. The provision of mounting slots 410 strengthens the connection between conductive connector bar 200 and mounting plate 400, improving the stability of the overall battery structure. Furthermore, mounting slots 410 provide precise positioning for conductive connector bar 200. During assembly, conductive connector bar 200 can be automatically aligned by being placed into the corresponding mounting slots 410, simplifying the assembly process and improving assembly accuracy and efficiency.

[0112] Optionally, the opening of the installation slot 410 is designed to be beveled. The beveled design can provide better guidance, so that the conductive connection bar 200 can be more easily slid into or snapped into the receiving slot during the installation process, thereby improving installation efficiency.

[0113] In some embodiments, reference Figure 2 and Figure 4 The mounting plate is provided with a slot 440 extending through the mounting plate in a first direction. Slot 440 is used to secure the battery wiring harness. Slot 440 secures and protects the wiring harness, preventing damage due to vibration, friction, or other external forces, thereby ensuring the proper organization of the battery structure.

[0114] In addition, the embodiments of the present application also provide a battery. It should be noted that the battery can be a primary battery or a secondary battery. A primary battery refers to a battery that cannot be recharged and reused after the battery is discharged, and a secondary battery refers to a battery that can be recharged to activate the active material and continue to be used after the battery is discharged. The battery can be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-cadmium battery, etc. The battery can be a square-shell battery, a cylindrical battery, or a soft-pack battery, or it can be of other shapes. The embodiments of the present application are not limited to this, and the embodiments of the present application are specifically described using a square-shell battery as an example.

[0115] The battery includes a plurality of battery cells 100 arranged along the thickness direction thereof, and a conductive connection bar 200 or an end plate assembly in any of the above embodiments. The deformation portion 230 is provided on the end surface of the battery cell 100 along the thickness direction thereof.

[0116] When the battery cell 100 expands due to internal chemical reactions or external environmental factors during use, the middle part of the battery cell 100 will expand outward. At this time, the deformation part 230 of the conductive connecting bar 200 will deform accordingly to absorb the expansion of the battery cell 100, so that the first connecting part 210 and the second connecting part 220 remain electrically connected to the electrical components of the battery. The expansion of the battery cell 100 will not cause the conductive connecting bar 200 to be disconnected at the connection position with the electrical components of the battery, thereby avoiding the occurrence of contact failure. By setting the conductive connecting bar 200 and the end plate assembly, the safety of battery use is guaranteed.

[0117] In some embodiments, reference Figure 1 The battery cell 100 includes a first end and a second end opposite to each other along a first direction, and the first end and the second end are both provided with a first electrode 100a and a second electrode 100b with opposite polarities. The first electrodes 100a and the second electrodes 100b at the same end of the multiple battery cells 100 are electrically connected in sequence to be connected in series, and the multiple battery cells 100 include a head-end battery cell 100A and an end battery cell 100B; there are two conductive connecting bars 200, wherein the first connecting portion 210 and the second connecting portion 220 of one conductive connecting bar 200 are respectively connected to the first electrode 100a at both ends of the head-end battery cell 100A, and the first connecting portion 210 and the second connecting portion 220 of the other conductive connecting bar 200 are respectively connected to the second electrode 100b at both ends of the end battery cell 100B.

[0118] Illustratively, the first electrode 100a is a positive electrode, and the second electrode 100b is a negative electrode.

[0119] Specifically, the two first electrodes 100a at both ends of the first-end battery cell 100A are connected via a conductive connecting bar 200, achieving a series connection between the positive electrodes of the first-end battery cell 100A, forming a positive electrode output terminal. The two second electrodes 100b at both ends of the terminal battery cell 100B are connected via another conductive connecting bar 200, achieving a series connection between the negative electrodes of the terminal battery cell 100B, forming a negative electrode output terminal. This series connection structure increases the total voltage of the battery. It should be noted that the operator can choose to increase or decrease the number of battery cells 100 or change the arrangement of the battery cells 100 based on actual parameters such as battery capacity and voltage, and this is not limited here.

[0120] Illustratively, the battery cell 100 may be a blade battery cell 100, or a battery cell 100 of any module battery including two or more groups of poles. Any battery that implements an electrical circuit design in which the single-end electrodes of the battery cell 100 are connected in series and then the two ends of the battery cell 100 are within the scope of protection of the present application, and the embodiments of the present application do not limit this.

[0121] In addition, the battery cell 100 can be a blade battery cell 100, or a battery cell 100 of any battery cell 100 module battery including four poles. Any battery that realizes an electrical circuit design in which the two electrodes at a single end of the battery cell 100 are connected in series and then the two ends of the battery cell 100 are connected in parallel are within the scope of protection of the present application, and the embodiments of the present application do not limit this.

[0122] Accordingly, refer to Figure 1 and Figure 2 There are two connecting pieces 300, which are respectively connected to the two conductive connecting bars 200 located at the head battery cell 100A and the end battery cell 100B. During the fast current charging process, after the current flows into the positive output terminal, it will be diverted to both sides of the battery cell 100, and the current will be halved. When the current is halved during high current fast charging, the conductive connecting bar 200 will have a lower temperature and a smaller internal resistance.

[0123] In some embodiments, the battery further includes an aerogel layer. The conductive connecting bar 200 is mounted on the side of the mounting plate facing away from the battery cells 100, with the aerogel layer positioned between the battery cells 100 and the mounting plate. Specifically, aerogel is a lightweight, nanoporous material with extremely low thermal conductivity, resulting in excellent thermal insulation properties. In a battery, aerogel effectively isolates the battery cells 100 from heat conduction, preventing heat accumulation and overheating, thereby improving battery safety.

[0124] In some embodiments, the battery further includes an adhesive component, through which the mounting plate 400 is connected to the aerogel layer. Specifically, the adhesive component can firmly adhere the mounting plate 400 to the aerogel layer, ensuring the stability of the mounting plate 400 in the battery and preventing loosening or falling off due to vibration or impact. Specifically, the core of the adhesive component is an adhesive. Exemplary adhesives can be made of epoxy glue, organic silicone glue, polyurethane glue, etc. The specific material can be selected based on the specific requirements of the battery and the operating environment, and is not limited here.

[0125] In some embodiments, combined Figure 2 and Figure 4The battery also includes a connector 700, and multiple connectors 700 are provided at both ends of the multiple battery cells 100 along the first direction, and the first electrode 100a and the second electrode 100b of the two adjacent battery cells 100 at the same end are electrically connected through the connector 700. The provision of the connector 700 enables the current to pass through each battery cell 100 in turn through the connector 700, thereby improving the total voltage and capacity of the battery module. Multiple connectors 700 fix the battery cells 100 together to prevent the battery cells 100 from moving or misaligning inside the battery, thereby ensuring the overall stability of the battery. Exemplarily, the connection relationship between the connector 700 and the battery cell 100 can be welding, bolt connection, snap connection, etc. The specific connection method can be selected according to the specific requirements and working environment of the battery, and is not limited here.

[0126] In addition, the present application also provides an electric device including any of the batteries mentioned in the above embodiments. The electric device may be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, etc.

[0127] The vehicle may be a new energy vehicle, such as a pure electric vehicle (PEV / BEV), a range-extended electric vehicle (REEV), a hybrid electric vehicle (HEV), or a fuel cell electric vehicle. The vehicle may also be any vehicle with a battery. The embodiments of the present application do not impose any particular restrictions on electrical equipment.

[0128] The electrical equipment of this embodiment is provided with a conductive connecting bar 200 so that the expansion of the battery cell 100 will not cause disconnection at the connection position between the conductive connecting bar 200 and the electrical components of the battery, thereby avoiding the occurrence of a disconnection phenomenon, ensuring the normal use of the battery, and thus better supplying power to the electrical equipment.

[0129] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0130] It should be noted that phrases such as "one embodiment," "an embodiment," "exemplary embodiments," and "some embodiments" in this specification may indicate embodiments that may include a particular feature, structure, or characteristic, but not every embodiment necessarily includes that particular feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not.

[0131] Generally speaking, terms should be understood, at least in part, based on the context in which they are used. For example, as used herein, the term "one or more" can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense, depending at least in part on the context. Similarly, terms such as "a" or "an" can also be understood to convey either singular or plural usage, depending at least in part on the context.

[0132] It should be readily understood that “on,” “above,” and “over” in this disclosure should be interpreted in the broadest manner, such that “on” means not only “directly on something,” but also includes “on something” with intervening features or layers therebetween, and “above” or “over” includes not only the meaning of “above” or “over,” but also includes “above” or “over” with no intervening features or layers therebetween (i.e., directly on something).

[0133] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A conductive connecting bar, characterized in that: For batteries, including: A first connecting portion, a deformation portion and a second connecting portion, wherein the first connecting portion and the second connecting portion are respectively connected to both sides of the deformation portion along a first direction, the first connecting portion and the second connecting portion are respectively suitable for being electrically connected to the electrical components of the battery, and the deformation portion is suitable for being arranged on the end face of the battery cell along its own thickness direction.

2. The conductive connecting bar according to claim 1, wherein: The deformation portion includes at least one tensile structure, wherein the tensile structure is configured to have a variable length along the first direction.

3. The conductive connecting bar according to claim 2, wherein: The stretching structure includes a main body section and a deformation section, the main body section extends along the first direction, and both ends of the main body section are connected to the deformation section; One end of the deformation segment is connected to the main body segment, and the other end extends obliquely relative to the main body segment. The two deformation segments are respectively connected to the first connecting portion and the second connecting portion.

4. The conductive connecting bar according to claim 3, wherein: There are multiple tensile structures, and the multiple tensile structures are arranged relatively along a second direction, and the second direction is perpendicular to the first direction; One of the deformation segments of each of the tensile structures is connected to the first connection portion, and the other deformation segment of each of the tensile structures is connected to the second connection portion.

5. The conductive connecting bar according to claim 4, characterized in that: The deformation sections of two adjacent tensile structures have opposite inclination directions.

6. The conductive connecting bar according to claim 4, characterized in that: Also includes: An elastic return member is provided between the two stretching structures, and two ends of the elastic return member are respectively connected to the two stretching structures.

7. The conductive connecting bar according to claim 6, characterized in that: The elastic return member includes an elastic section and a fixed section. There are two fixed sections, which are respectively located at two ends of the elastic section along the second direction and are fixedly connected to the corresponding tensile structure.

8. The conductive connecting bar according to any one of claims 1 to 7, characterized in that: The conductive connection row includes a plurality of foil layers, and the plurality of foil layers are stacked in sequence along a thickness direction to form the deformation portion.

9. The conductive connecting bar according to claim 8, characterized in that: The foil layer is an aluminum foil layer.

10. The conductive connecting bar according to any one of claims 1 to 7, characterized in that: The first connecting portion includes: a first connecting side plate and a second connecting side plate; The first connecting side plate is connected between the second connecting side plate and the deforming portion; The second connecting side plate is arranged at an angle to the first connecting side plate, and the second connecting side plate is used to connect to the battery cell electrodes.

11. An end plate assembly, characterized in that: include: A mounting plate and a conductive connecting bar according to any one of claims 1 to 10, wherein the mounting plate is adapted to be arranged on an end face of the battery cell along its thickness direction; The conductive connection bar is mounted on the mounting plate.

12. The end plate assembly according to claim 11, wherein: The mounting plate is provided with a clamping structure, and the clamping structure is clamped and matched with the conductive connection row.

13. The end plate assembly according to claim 11, wherein: A plurality of reinforcing ribs are provided on one side of the mounting plate facing the conductive connection bar.

14. The end plate assembly according to claim 13, wherein: A plurality of the reinforcing ribs are interconnected to form a honeycomb shape.

15. The end plate assembly according to any one of claims 11 to 14, characterized in that: The mounting plate is provided with a mounting groove, and the conductive connection bar is embedded in the mounting groove.

16. The end plate assembly according to any one of claims 11 to 14, characterized in that: A card slot is provided on the mounting plate, and the card slot penetrates the mounting plate along a first direction, and the card slot is used for clamping the wiring harness of the battery.

17. A battery, characterized in that: It comprises a plurality of battery cells arranged along the thickness direction thereof, and the conductive connecting bar according to any one of claims 1 to 10 or the end plate assembly according to any one of claims 11 to 16, wherein the deformation portion is provided on the end surface of the battery cell along the thickness direction thereof.

18. The battery according to claim 17, characterized in that The battery cell comprises a first end and a second end opposite to each other along a first direction, the first end and the second end are both provided with a first electrode and a second electrode with opposite polarities, the first electrode and the second electrode of a plurality of battery cells located at the same end are electrically connected in sequence to be connected in series, and the plurality of battery cells comprise a head end battery cell and a tail end battery cell; There are two conductive connection bars, wherein the first connection portion and the second connection portion of one of the conductive connection bars are respectively connected to the first electrodes at both ends of the first-end battery cell, and the first connection portion and the second connection portion of the other conductive connection bar are respectively connected to the second electrodes at both ends of the terminal battery cell.

19. The battery according to claim 17, characterized in that Also includes: The aerogel layer is provided between the battery core and the mounting plate. The conductive connecting bar is mounted on a side of the mounting plate facing away from the battery core.

20. The battery according to claim 18, characterized in that Also includes: Connectors, wherein both ends of the plurality of battery cells along the first direction are provided with a plurality of connectors, and the first electrode and the second electrode of two adjacent battery cells located at the same end are electrically connected via the connectors.

21. An electrical device, characterized in that: A battery comprising the battery according to any one of claims 17 to 20.

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