Battery and electric equipment

Abstract

The embodiment of the utility model provides a battery and electric equipment. The battery comprises a battery monomer group and a bus assembly. The battery cell group includes a plurality of battery cells arranged in a first direction. The confluence assembly comprises a support and a plurality of confluence pieces. Wherein the support is an insulating part, and the convergence part is installed on the support. And the confluence piece is used for realizing electric connection of the plurality of battery monomers. And the battery monomer comprises an electrode terminal which is clamped with the confluence assembly. The confluence assembly is connected with the electrode terminals of the battery monomers in a clamping manner, so that the plurality of battery monomers can be electrically connected by the confluence piece in the confluence assembly. According to the invention, the busbar assembly and the battery monomers are detachably connected, so that the battery monomers can be conveniently disassembled when the battery monomers need to be replaced in the later period, which is beneficial for prolonging the service life of the battery and reducing the assembling cost of the battery.

Description

Technical Field

[0001] The present application relates to the field of batteries, and more specifically, to a battery and an electrical device. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] In the development of battery technology, in addition to improving battery performance, improving the overall service life of the battery is also an issue that needs to be considered.

[0004] Therefore, how to improve the overall service life of the battery is an urgent problem to be solved in battery technology. Utility Model Content

[0005] In view of the above problems, the embodiments of the present application provide a battery and an electrical device to increase the overall service life of the battery.

[0006] In a first aspect, an embodiment of the present application provides a battery, comprising a battery cell group and a busbar assembly. The battery cell group comprises a plurality of battery cells arranged along a first direction. The busbar assembly comprises a bracket and a plurality of busbars. The bracket is an insulating member, and the busbar is mounted on the bracket. The busbar is used to realize electrical connection of a plurality of battery cells. The battery cell comprises an electrode terminal, and the electrode terminal is clamped with the busbar assembly.

[0007] In the technical solution of the embodiment of the present application, the busbar assembly is connected to the electrode terminal of the battery cell by means of a snap connection, so that the busbar in the busbar assembly can electrically connect multiple battery cells. This makes the busbar assembly and the battery cell detachably connected, so that when the battery cell needs to be replaced later, the battery cell can be easily disassembled, which is beneficial to prolonging the service life of the battery and reducing the cost of battery assembly.

[0008] In some embodiments, the battery further comprises a box, the battery cell group is contained in the box, and the box has a bottom wall for supporting the battery cell group. The bottom wall is located on one side of the battery cell group in the second direction, and the busbar assembly is located on the side of the battery cell group in the third direction. The first direction, the second direction, and the third direction are perpendicular to each other.

[0009] In the above technical solution, the box body provides installation space for the battery cell group, thereby improving the integration of the battery. The design of the bottom wall provides a location for installing the battery cell group and / or the components for fixing the battery cell group. The busbar assembly is arranged on the side of the battery cell group in the third direction, so that the busbar assembly does not occupy the space inside the box body in the second direction, thereby increasing the energy density of the battery in the second direction.

[0010] In some embodiments, along the third direction, the busbar is disposed on a side of the bracket facing the battery cell group, and at least a portion of the electrode terminal is interposed between the busbar and the bracket and contacts the busbar.

[0011] In the above technical solution, at least a part of the electrode terminal is inserted between the busbar and the bracket, so that the bracket and the busbar play a structural limiting and protective role on the electrode terminal. The electrode terminal can be connected to the busbar, so that the busbar can electrically connect multiple battery cells.

[0012] In some embodiments, the busbar and the bracket are combined to form a socket, and at least a portion of the electrode terminal is inserted into the socket.

[0013] In the above technical solution, at least a portion of the electrode terminal is inserted into the insertion hole formed by the busbar and the bracket to achieve the clamping connection between the electrode terminal and the busbar assembly, and enable the electrode terminal to abut against the portion of the busbar located in the insertion hole. At the same time, the electrode terminal is inserted into the insertion hole, which can facilitate the installation and removal of the busbar assembly and the electrode terminal.

[0014] In some embodiments, a plugging direction of the electrode terminal and the plug hole is parallel to the second direction.

[0015] In the above technical solution, the plugging direction of the electrode terminal and the plug hole is parallel to the second direction, so that the busbar assembly can be easily installed and removed from the box along the second direction.

[0016] In some embodiments, the busbar is a bent structure, and the busbar includes a connecting portion and two busbars, wherein the connecting portion connects the two busbars, and each busbar and the bracket are enclosed to form a plug hole.

[0017] In the above technical solution, each busbar and the bracket enclose a plug hole, so that two electrode terminals respectively abutting against the two busbars can be electrically connected through the connecting part and the two busbars.

[0018] In some embodiments, the bracket includes a bracket body and a first positioning member, the confluence member is disposed on a first surface of the bracket body, and a plug hole is formed between the confluence portion and the first surface. The first positioning member is connected to the bracket body, and along the second direction, the connecting portion is sandwiched between the first positioning member and the first surface.

[0019] In the above technical solution, along the second direction, the connecting portion is clamped between the first positioning member and the first surface. The connecting portion can be fixed on the first surface by clamping, which facilitates the installation and removal of the connecting portion relative to the first surface. At the same time, the conduit can be fixed relative to the first surface, which is beneficial to improving the stability of the connection between the electrode terminal and the conduit.

[0020] In some embodiments, the busbar further includes two flanged portions, which are respectively connected to one end of the two busbars facing away from the connecting portion, and both the flanged portions and the connecting portion are in contact with the first surface.

[0021] In the above technical solution, the flange portion and the connecting portion are both in contact with the first surface, so that the two ends of the busbar in the first direction are fixed relative to the first surface by the flange portion and the connecting portion respectively, which is beneficial to improving the stability of the connection between the electrode terminal and the busbar.

[0022] In some embodiments, the bracket also includes multiple second positioning members, which are arranged on the first surface at intervals along the first direction, and the collector is arranged between two adjacent second positioning members. A groove is arranged on the side of the second positioning member, and at least a portion of the flange portion is inserted into the groove.

[0023] In the above technical solution, a groove is provided on the side of the second positioning member, and at least a part of the flange portion is inserted into the groove. The groove can limit the movement of the flange portion in the third direction. This increases the stability of the connection between the busbar and the bracket, which is beneficial to improving the stability of the connection between the electrode terminal and the busbar.

[0024] In some embodiments, at least a portion of the electrode terminal is a bent sheet-like structure.

[0025] In the above technical solution, at least a part of the electrode terminal is a sheet-like structure to facilitate the insertion of the electrode terminal into the socket. At the same time, the sheet-like structure of the electrode terminal can reduce the size requirement of the socket in the third direction, thereby reducing the size of the busbar assembly in the third direction, so as to reduce the space occupied by the busbar assembly in the box, thereby facilitating the improvement of the energy density of the battery. The sheet-like structure is bent to facilitate the electrode terminal to be inserted into the socket and to abut against the part of the busbar assembly located in the socket.

[0026] In some embodiments, the battery includes a plurality of battery cell groups and a plurality of bus assemblies, the plurality of bus assemblies are arranged at intervals along a third direction, and a battery cell group is arranged between two adjacent bus assemblies.

[0027] In the above technical solution, a battery cell group is arranged between two adjacent bus assemblies along the third direction, thereby avoiding the mutual attachment of multiple bus assemblies, thus improving the space utilization rate in the box and the utilization rate of the bus assemblies.

[0028] In some embodiments, the battery further comprises a plurality of separators, which are arranged in the box and spaced apart along the third direction, and a battery cell group is arranged between two adjacent separators. The separator is an insulating member, one end of the separator is connected to the bottom wall, and the busbar assembly is detachably mounted on the other end of the separator.

[0029] In the above technical solution, one end of the separator is connected to the bottom wall, and the bus assembly is detachably mounted on the other end of the separator. This allows the bottom wall to provide support to the bus assembly through the separator, which is beneficial to improving the stability of the bus assembly when the battery is working. At the same time, the bus assembly is detachably mounted on the other end of the separator, so that the bus assembly can be removed from the separator, so that when the battery cell needs to be replaced later, it is convenient to disassemble the battery cell, which is beneficial to improving the service life of the battery and reducing the cost of battery assembly.

[0030] In some embodiments, the battery further includes a heat management component, and along the third direction, the heat management component is disposed between the separator and the battery cell group.

[0031] In the above technical solution, along the third direction, the thermal management component is arranged between the separator and the battery cell group to adjust the temperature of the battery cell. At the same time, the thermal management component can fully utilize the space of the box in the third direction, which is beneficial to improving the space utilization rate in the box and increasing the energy density of the battery.

[0032] In some embodiments, the battery further includes a first buffer member disposed between the separator and the heat management component along the third direction.

[0033] In the above technical solution, along the third direction, the first buffer is arranged between the separator and the thermal management component. So that the separator can provide the thermal management component with a supporting force in the third direction through the first buffer. Then, the thermal management component can be attached to the battery cell in the battery cell group in the third direction, which not only increases the temperature regulation ability of the thermal management component on the battery cell, but also enables the thermal management component to provide a certain restraining force to the battery cell in the third direction to limit the movement of the battery cell in the third direction, thereby improving the stability of the connection between the electrode terminal and the busbar.

[0034] In some embodiments, the battery cell further includes a pressure relief mechanism, which is disposed on one side of the battery cell in the second direction, and the electrode terminals are disposed on both sides of the battery cell in the third direction.

[0035] In the above technical solution, the pressure relief mechanism is arranged on one side of the battery cell in the second direction, and the electrode terminals are arranged on both sides of the battery cell in the third direction. In this way, when the battery cell has thermal runaway, the discharge of the battery cell discharged through the pressure relief mechanism will be discharged in a direction away from the bus assembly, so the discharge is not easy to break through the bracket of the bus assembly.

[0036] In some embodiments, the box has an opening, and the battery further comprises a cover, which covers the opening. A second buffer is disposed between the box and the battery cell group, and a third buffer is disposed between the cover and the battery cell group.

[0037] In the above technical solution, the cover body is connected via the third buffer member, so that the battery cell group can provide a supporting force to the cover body via the third buffer member, thereby increasing the strength of the cover body.

[0038] In a second aspect, an embodiment of the present application provides an electrical device, which includes the battery in the above embodiment, and the battery is used to provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0041] Figure 2 An exploded view of a battery provided for some embodiments of the present application;

[0042] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0043] Figure 4 An exploded view of a battery cell group provided for some embodiments of the present application;

[0044] Figure 5 An exploded view of another battery provided for some embodiments of the present application;

[0045] Figure 6 A cross-sectional view of a battery along a first direction provided in some embodiments of the present application;

[0046] Figure 7 for Figure 6 Enlarged view of point C in the middle;

[0047] Figure 8 A schematic diagram of the structure of a busbar provided in some embodiments of the present application;

[0048] Fig. 9 An exploded view of a busbar assembly provided in some embodiments of the present application;

[0049] Fig.10 A schematic diagram of the structure of a busbar assembly provided in some embodiments of the present application;

[0050] Fig.11 A schematic diagram of the structure of a busbar assembly in another direction provided by some embodiments of the present application;

[0051] Fig.12 for Figure 4 The enlarged view of point B in the middle;

[0052] Fig.13 A cross-sectional view of another battery along a first direction provided in some embodiments of the present application;

[0053] Fig.14 A schematic diagram of the structure of a busbar assembly provided in some embodiments of the present application after being installed on a separator;

[0054] Fig.15 for Fig.13 The enlarged view of point D in the middle;

[0055] Fig.16 An exploded view of a separator and a thermal management component provided for some embodiments of the present application;

[0056] Fig.17 A schematic diagram of the structure of a battery cell provided in some embodiments of the present application;

[0057] Fig.18 An exploded view of another battery provided for some embodiments of the present application;

[0058] Fig.19 A schematic diagram of the structure of a cover body provided in some embodiments of the present application;

[0059] Fig. 20 A cross-sectional view of another battery along a first direction provided in some embodiments of the present application;

[0060] Fig.21 for Fig. 20 Enlarged view of point E in the middle.

[0061] The reference numerals in the specific implementation manner are as follows:

[0062] 1000 – vehicles;

[0063] 100 - battery; 200 - controller; 300 - motor;

[0064] 10 - box body; 101 - bottom wall; 102 - opening; 11 - cover body; 12 - second buffer member; 13 - third buffer member;

[0065] 20 - battery cell group; 21 - battery cell; 211 - electrode terminal; 211A - first part; 211B - second part; 212 - pressure relief mechanism; 22 - fourth buffer;

[0066] 30 - busbar assembly; 31 - bracket; 311 - bracket body; 311A ​​- first surface; 312 - first positioning member; 313 - second positioning member; 313A - groove; 314 - raised portion; 32 - busbar; 321 - connecting portion; 322 - busbar portion; 323 - flange portion; 33 - socket;

[0067] 40 - partition; 401 - accommodating portion; 41 - thermal management component; 411 - first connecting pipe; 412 - second connecting pipe; 42 - first buffer; 43 - limiting member. DETAILED DESCRIPTION

[0068] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are 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 creative work are within the scope of protection of this application.

[0069] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0070] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0071] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0072] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0073] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0074] The term "plurality" used in the present application refers to two or more (including two).

[0075] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0076] Battery cells include, but are not limited to, lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, and the like.

[0077] A battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and removed between the positive electrode and the negative electrode. The separator is set between the positive electrode and the negative electrode to reduce the risk of short circuit between the positive and negative electrodes, while allowing active ions to pass through.

[0078] In some embodiments, the battery cell further includes an electrolyte, which plays a role in conducting ions between the positive and negative electrodes. The electrolyte may be in a liquid, gel or solid state.

[0079] In some embodiments, the electrode assembly is provided with tabs, which can lead current out of the electrode assembly. The tabs include a positive tab and a negative tab.

[0080] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film.

[0081] In some embodiments, the battery cell may include an electrode terminal, which is used to be electrically connected to the electrode assembly to output the electrical energy of the battery cell. The electrode terminal may include a positive electrode terminal and a negative electrode terminal, the positive electrode terminal is used to be electrically connected to the positive electrode ear, and the negative electrode terminal is used to be electrically connected to the negative electrode ear. The positive electrode terminal may be directly connected to the positive electrode ear or indirectly connected, and the negative electrode terminal may be directly connected to the negative electrode ear or indirectly connected. Exemplarily, the positive electrode terminal is electrically connected to the positive electrode ear through a current collecting member, and the negative electrode terminal is electrically connected to the negative electrode ear through another current collecting member.

[0082] As an example, the battery cell may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery.

[0083] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.

[0084] In some embodiments, the battery may be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0085] In some embodiments, the battery may include a busbar, and multiple battery cells may be electrically connected via the busbar to achieve series connection, parallel connection, or hybrid connection of the multiple battery cells.

[0086] In some embodiments, the battery may be a battery pack, which includes a case and battery cells, wherein the battery cells or battery modules are accommodated in the case.

[0087] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0088] In some embodiments, the battery may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0089] The development of battery technology must take into account many design factors at the same time, such as energy density, cycle life, discharge capacity, charge and discharge rate and other performance parameters. In addition, the overall service life of the battery must also be considered.

[0090] During the use of the battery, the battery cells inside the battery may sometimes be damaged and need to be replaced. However, since the busbar is generally not detachably connected to the electrode terminal, the replacement cost and time cost of replacing the battery cells increase, thereby increasing the battery maintenance cost and further reducing the battery life.

[0091] In view of this, an embodiment of the present application provides a battery, which includes a battery cell group and a busbar assembly. The battery cell group includes multiple battery cells. The busbar assembly includes a bracket and multiple busbars. Among them, the bracket is an insulating member, and the busbar is installed on the bracket. The busbar is used to achieve electrical connection of multiple battery cells. Among them, the battery cell includes an electrode terminal, and the electrode terminal is snap-connected to the busbar assembly. In addition, the busbar assembly and the battery cell are detachably connected, so that when the battery cell needs to be replaced later, the battery cell can be easily disassembled, which is beneficial to increasing the service life of the battery and reducing the cost of battery assembly.

[0092] The embodiments of the present application provide an electric device using a battery as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0093] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device in an embodiment of the present application.

[0094] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0095] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0096] According to some embodiments of the present application, referring to Figure 2 , and further refer to Figure 3 and Figure 4 , Figure 2 An exploded view of a battery 100 provided in some embodiments of the present application, Figure 3 for Figure 2 The battery 100 may include a battery cell group 20 and a busbar assembly 30. The battery cell group 20 includes a plurality of battery cells 21 arranged along a first direction X. The busbar assembly 30 includes a bracket 31 and a plurality of busbars 32. The bracket 31 is an insulating member, and the busbar 32 is mounted on the bracket 31. The busbar 32 is used to realize the electrical connection of the plurality of battery cells 21. The battery cell 21 includes an electrode terminal 211, and the electrode terminal 211 is clamped with the busbar assembly 30.

[0097] It can be understood that the multiple battery cells 21 in the battery cell group 20 can be connected in series, in parallel, or in a mixed connection. The mixed connection means that the multiple battery cells 21 are both connected in series and in parallel. The multiple battery cells 21 can be directly connected in series, in parallel, or in a mixed connection to form the battery cell group 20; or, the multiple battery cells 21 can also be connected in series, in parallel, or in a mixed connection to form a battery 100 module, and the multiple battery 100 modules are then connected in series, in parallel, or in a mixed connection to form the battery cell group 20, which is not limited in the embodiments of the present application.

[0098] The first direction X is the direction in which the battery cells 21 in the battery cell group 20 are arranged.

[0099] Alternatively, if Figure 4 As shown, the two surfaces of the battery cells 21 arranged opposite to each other in the first direction X are the surfaces with the largest area of ​​the battery cells 21, and the battery cells 21 are arranged at intervals along the first direction X, and a fourth buffer 22 is arranged between two adjacent battery cells 21. This prevents the battery cells 21 from directly abutting against each other in the first direction X, and prevents the battery cells 21 from squeezing each other when they expand due to thermal runaway. This is beneficial to improving the reliability of the battery 100 during operation.

[0100] Furthermore, the fourth buffer member 22 may be made of one or both of foam or insulating rubber.

[0101] The busbar 32 is a component for realizing series connection, parallel connection, or mixed connection of multiple battery cells 21 . The multiple battery cells 21 can be electrically connected through the busbar 32 .

[0102] It can be understood that the busbar 32 should be made of conductive material.

[0103] The bracket 31 is a component in the busbar assembly 30 for fixing the busbar 32 , and the busbar 32 is mounted on the bracket 31 .

[0104] It can be understood that the bracket 31 is an insulating member to prevent the busbar 32 from being electrically connected through the bracket 31 .

[0105] Optionally, the bracket 31 can be selected from any one of organic polymer insulating materials or inorganic insulating materials; or, in some embodiments of the present application, the material of the bracket 31 is selected from a mixture of organic polymer insulating materials and inorganic insulating materials, and the two can be mixed in any proportion.

[0106] The busbar assembly 30 is connected to the electrode terminal 211 of the battery cell 21 by a snap-on method, so that the busbar 32 in the busbar assembly 30 can electrically connect multiple battery cells 21. In addition, the busbar assembly 30 and the battery cell 21 are detachably connected, so that when the battery cell 21 needs to be replaced later, the battery cell 21 can be easily disassembled, which is beneficial to improving the service life of the battery 100 and reducing the cost of assembling the battery 100.

[0107] According to some embodiments of the present application, referring to Figure 5 , Figure 5 An exploded view of another battery 100 provided in some embodiments of the present application. The battery 100 further includes a box 10, in which a battery cell group 20 is accommodated, and the box 10 has a bottom wall 101 for supporting the battery cell group 20. The bottom wall 101 is located on one side of the battery cell group 20 in the second direction Y, and the busbar assembly 30 is located on the side of the battery cell group 20 in the third direction X. The first direction X, the second direction Y and the third direction X are perpendicular to each other.

[0108] The box body 10 is a shell for providing a stable and sealed working environment for the battery cells 21 .

[0109] Optionally, the box body 10 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the box body 10 is not easily deformed when squeezed or collided, so that the battery 100 can have a higher structural strength, which is beneficial to reducing the degree of damage to the battery 100 caused by external force collision.

[0110] The first direction X is parallel to the width direction of the box 10, the second direction Y is parallel to the height direction of the box 10, and the third direction X is parallel to the length direction of the box 10. The first direction X, the second direction Y and the third direction X are perpendicular to each other.

[0111] The bottom wall 101 is an inner wall of the box body 10 perpendicular to the second direction Y. The bottom wall 101 is used to provide a location for installing the battery cell group 20 and / or components for fixing the battery cell group 20 .

[0112] The box 10 provides a space for installing the battery cell group 20, thereby improving the integration of the battery 100. The design of the bottom wall 101 provides a location for installing the battery cell group 20 and / or components for fixing the battery cell group 20. The busbar assembly 30 is arranged on the side of the battery cell group 20 in the third direction X, so that the busbar assembly 30 does not occupy the space inside the box 10 in the second direction Y, thereby increasing the energy density of the battery 100 in the second direction Y.

[0113] According to some embodiments of the present application, referring to Figure 6 , and further refer to Figure 7 , Figure 6 Some embodiments of the present application provide a cross-sectional view of a battery 100 along a first direction X, Figure 7 for Figure 6 The enlarged view of the B in FIG. Along the third direction X, the busbar 32 is disposed on the side of the bracket 31 facing the battery cell group 20 . At least a portion of the electrode terminal 211 is interposed between the busbar 32 and the bracket 31 and contacts the busbar 32 .

[0114] Understandably, if Figure 7 As shown, the portion of the electrode terminal 211 inserted between the busbar 32 and the bracket 31 may be inclined from bottom to top along the second direction Y in a direction away from the bracket 31 to abut against the side of the busbar 32 facing the bracket 31 .

[0115] In this way, at least a portion of the electrode terminal 211 is inserted between the busbar 32 and the bracket 31, so that the bracket 31 and the busbar 32 play a structural role in limiting and protecting the electrode terminal 211. The risk of other components of the battery 100 colliding with the electrode terminal 211 is reduced to improve the stability of the connection between the electrode terminal 211 and the busbar 32. The electrode terminal 211 can be connected to the busbar 32, so that the busbar 32 can electrically connect multiple battery cells 21.

[0116] According to some embodiments of the present application, continue to refer to Figure 7 The busbar 32 and the bracket 31 are combined to form an insertion hole 33 , and at least a portion of the electrode terminal 211 is inserted into the insertion hole 33 .

[0117] Understandably, if Figure 7 As shown, the insertion hole 33 may be a through hole, and illustratively, the two opening sides of the insertion hole 33 are arranged opposite to each other along the third direction X. In this case, at least a portion of the electrode terminal 211 is inserted into the insertion hole 33 through any opening side, and the bracket 31 has a protrusion 314, which extends in the direction close to the battery cell group 20 along the third direction X to cover at least a portion of the other opening side, so as to limit the discharge of the battery cell 21 from falling into the insertion hole 33 when the battery cell 21 is in thermal runaway.

[0118] In this way, at least a portion of the electrode terminal 211 is inserted into the insertion hole 33 formed by the busbar 32 and the bracket 31, so that the insertion hole 33 plays a structural limiting and protective role for the electrode terminal 211. The risk of other components of the battery 100 colliding with the electrode terminal 211 is reduced. The electrode terminal 211 is clamped with the busbar assembly 30, and the electrode terminal 211 can abut against the portion of the busbar 32 located in the insertion hole 33.

[0119] According to some embodiments of the present application, continue to refer to Figure 7 , the plugging direction of the electrode terminal 211 and the plug hole 33 is parallel to the second direction Y.

[0120] like Figure 7 At least part of the electrode terminal 211 is tilted from bottom to top along the second direction Y in a direction away from the bracket 31 to form a free end. When the electrode terminal 211 and the socket 33 are plugged, the socket 33 is sleeved outside the free end from top to bottom along the second direction Y. During this process, the free end of the electrode terminal 211 abuts against the side of the busbar 32 located in the socket 33 and slides against each other until the free end of the electrode terminal 211 is completely inserted into the socket 33. At this time, the electrode terminal 211 contacts the side of the busbar 32 located in the socket 33. This makes it convenient to clip the busbar assembly (not shown in the figure) onto the battery cell (not shown in the figure). So that the busbar 32 is electrically connected to the battery cell (not shown in the figure).

[0121] When the electrode terminal 211 and the insertion hole 33 are separated, the insertion hole 33 is pulled away from the electrode terminal 211 from bottom to top along the second direction Y. During this process, the free end of the electrode terminal 211 abuts against the side of the busbar 32 located in the insertion hole 33 and slides against each other until the free end of the electrode terminal 211 completely leaves the insertion hole 33. This facilitates the removal of the busbar assembly (not shown in the figure) from the battery cell (not shown in the figure).

[0122] The plugging direction between the electrode terminal 211 and the plug hole 33 is parallel to the second direction Y, so as to facilitate installation and removal of the busbar assembly 30 from the box body 10 along the second direction Y.

[0123] According to some embodiments of the present application, referring to Figure 8 , and please refer to Fig. 9 and Fig.10 , Figure 8 A schematic diagram of the structure of the busbar 32 provided in some embodiments of the present application, Fig. 9 An exploded view of a busbar assembly 30 provided in some embodiments of the present application, Fig.10The schematic diagram of the structure of the busbar assembly 30 provided in some embodiments of the present application. The busbar 32 is a bent structure, and the busbar 32 includes a connecting portion 321 and two busbars 322, and the connecting portion 321 connects the two busbars 322. Each busbar 322 and the bracket 31 enclose a plug hole 33.

[0124] The current collector 32 has a bent structure, that is, at least one section of the current collector portion 322 can be bent and / or folded relative to the connecting portion 321 .

[0125] The busbar portion 322 is a portion of the busbar 32 for contacting with an electrode terminal (not shown).

[0126] Alternatively, if Fig.10 As shown, the confluence portion 322 is bent relative to the connection portion 321 so as to form a certain gap with the bracket 31 in the third direction X to form the insertion hole 33 .

[0127] The connecting portion 321 is a portion of the current collector 32 used to connect two current collectors 322. The current collectors 322 are disposed on the bracket 31.

[0128] It is understandable that the confluence part 322 can be mounted on the bracket 31 in a non-detachable manner or in a detachable manner. When the confluence part 322 is mounted on the bracket 31 in a non-detachable manner, for example, the bracket 31 can be injection molded on the confluence part 322, and the bracket 31 and the confluence part 322 are formed as one body by plastic injection molding. Thus, the bracket 31 can stably position and protect the confluence part 322, thereby effectively reducing the risk of movement of the confluence part 322 relative to the bracket 31.

[0129] Each conduit portion 322 and the bracket 31 are combined to form a plug hole 33 , so that two electrode terminals 211 respectively abutting against the two conduits 322 can be electrically connected through the connecting portion 321 and the two conduits 322 .

[0130] According to some embodiments of the present application, referring to Fig. 9 , and further refer to Fig.10 and Fig.11 , Fig.11 The schematic diagram of the structure of the busbar assembly 30 in another direction provided by some embodiments of the present application. The bracket 31 includes a bracket body 311 and a first positioning member 312. The busbar 32 is disposed on the first surface 311A ​​of the bracket body 311, and a plug hole 33 is formed between the busbar portion 322 and the first surface 311A. The first positioning member 312 is connected to the bracket body 311, and along the second direction Y, the connecting portion 321 is sandwiched between the first positioning member 312 and the first surface 311A.

[0131] The first positioning member 312 is a component in the bracket 31 used for fixing the confluence portion 322 .

[0132] Optionally, the first positioning member 312 may be connected to the bracket body 311 in a detachable manner; or, in some embodiments of the present application, the first positioning member 312 may be connected to the bracket body 311 in a non-detachable manner.

[0133] Furthermore, in some embodiments of the present application, the detachable connection between the first positioning member 312 and the bracket body 311 includes a snap connection and a threaded connection.

[0134] Furthermore, in some embodiments of the present application, the non-detachable connection method between the first positioning member 312 and the bracket body 311 includes hot melt connection, integral molding, and injection molding.

[0135] The first surface 311A ​​is the side of the bracket 31 facing the battery cell group (not shown in the figure).

[0136] like Fig.10 As shown, along the second direction Y, the connecting portion 321 is sandwiched between the first positioning member 312 and the first surface 311A ​​to limit the movement of the connecting portion 321 in the second direction Y.

[0137] Optionally, a distance H1 between a section of the confluence portion 322 close to the connection portion 321 and the first surface 311A ​​gradually increases in the direction away from the first positioning member 312 along the first direction X. And a maximum value H1' of H1 and a distance H2 between the first positioning member 312 and the first surface 311A ​​in the third direction X should satisfy H1'>H2. This prevents the confluence portion 322 from passing between the first positioning member 312 and the first surface 311A ​​along the first direction X, thereby limiting the movement of the confluence member (not shown in the figure) in the first direction X.

[0138] Optionally, a gap exists between one end of the first positioning member 312 away from the protrusion 314 and the first surface 311A ​​in the third direction X, so that the connecting portion 321 can slide into and / or out from between the first positioning member 312 and the first surface 311A ​​along the second direction Y through the gap.

[0139] In this way, the connection portion 321 is fixed on the first surface 311A ​​by means of a clamp, which facilitates the installation and removal of the connection portion 321 relative to the first surface 311A. At the same time, the confluence portion 322 can be fixed relative to the first surface 311A, which is beneficial to improving the stability of the connection between the electrode terminal (not shown in the figure) and the confluence portion 322.

[0140] According to some embodiments of the present application, referring to Figure 8 , and please refer to Fig. 9 and Fig.10The collector 32 further includes two flanged portions 323 , which are respectively connected to one end of the two collector portions 322 away from the connecting portion 321 , and the flanged portions 323 and the connecting portion 321 are both in contact with the first surface 311A.

[0141] The flange portion 323 is a portion of the current collector 32 used to limit the end of the current collector 322 away from the connecting portion 321 .

[0142] It can be understood that the flange portion 323 can be fitted to the first surface 311A ​​in a detachable manner. For example, the flange portion 323 can be fitted to the first surface 311A ​​by means of a snap connection or a screw connection.

[0143] Both ends of the busbar 322 in the first direction X are fixed relative to the first surface 311A ​​by the flanged portion 323 and the connecting portion 321 , respectively, which is beneficial to improving the stability of the connection between the electrode terminal (not shown) and the busbar 322 .

[0144] According to some embodiments of the present application, referring to Figure 8 , and please refer to Fig. 9 and Fig.10 as well as Fig.11 The bracket 31 also includes a plurality of second positioning members 313, which are spaced apart on the first surface 311A ​​along the first direction X, and the busbar 32 is disposed between two adjacent second positioning members 313. A groove 313A is disposed on the side of the second positioning member 313, and at least a portion of the flange portion 323 is inserted into the groove 313A.

[0145] The second positioning member 313 is a component in the bracket 31 used for fixing the flange portion 323 .

[0146] Optionally, the second positioning member 313 may be connected to the bracket body 311 in a detachable manner; or, in some embodiments of the present application, the second positioning member 313 may be connected to the bracket body 311 in a non-detachable manner.

[0147] Furthermore, in some embodiments of the present application, the detachable connection between the second positioning member 313 and the bracket body 311 includes a snap connection and a threaded connection.

[0148] Furthermore, in some embodiments of the present application, the non-detachable connection method between the second positioning member 313 and the bracket body 311 includes hot melt connection, integral molding, and injection molding.

[0149] The groove 313A is a positioning portion provided on a side of the second positioning member 313 facing the busbar 32 .

[0150] Optionally, the groove 313A may extend along the second direction Y to facilitate the insertion of the flange portion 323 into the groove 313A.

[0151] Optionally, the groove 313A may be formed by partially enclosing the first surface 311A ​​and the second positioning member 313; or, the groove 313A may be opened on the surface of the second positioning member 313 facing the busbar 32. Fig.10 The groove 313A is formed by partially enclosing the first surface 311A ​​and the second positioning member 313 .

[0152] Furthermore, one end of the groove 313A away from the protrusion 314 can pass through the second positioning member 313 to facilitate the flange portion 323 to slide into and / or out of the groove 313A along the second direction Y from one end of the groove 313A away from the protrusion 314 .

[0153] The groove 313A can limit the movement of the flange portion 323 in the third direction X. This increases the stability of the connection between the busbar 32 and the bracket 31, which is beneficial to improving the stability of the connection between the electrode terminal (not shown in the figure) and the busbar 322. At the same time, the groove 313A can prevent other components of the battery (not shown in the figure) from colliding with the flange portion 323, thereby protecting the flange portion 323.

[0154] According to some embodiments of the present application, referring to Fig.12 , Fig.12 for Figure 4 An enlarged view of point B in the figure. At least a portion of the electrode terminal 211 is a bent sheet structure.

[0155] The bending structure of a portion of the electrode terminal 211 means that a portion of the electrode terminal 211 can be bent and / or folded relative to another portion.

[0156] For example, Fig.12 As shown, the electrode terminal 211 includes a first part 211A and a second part 211B, wherein the first part 211A is used to connect to the electrode assembly (not shown in the figure) in the battery cell 21, and the second part 211B is a bent sheet structure, one end of the second part 211B is connected to the first part 211A, and the other end of the second part 211B is used to snap into the bus assembly (not shown in the figure).

[0157] At least a portion of the electrode terminal 211 is a sheet-like structure to facilitate the insertion of the electrode terminal 211 into the insertion hole (not shown in the figure). At the same time, the sheet-like structure of the electrode terminal 211 can reduce the size requirement of the insertion hole (not shown in the figure) in the third direction X, thereby reducing the size of the busbar assembly (not shown in the figure) in the third direction X, so as to reduce the space occupied by the busbar assembly (not shown in the figure) in the box (not shown in the figure), thereby facilitating the improvement of the energy density of the battery (not shown in the figure). The sheet-like structure is bent to facilitate the electrode terminal 211 to be inserted into the insertion hole (not shown in the figure) and to abut against the part of the busbar (not shown in the figure) located in the insertion hole (not shown in the figure).

[0158] According to some embodiments of the present application, referring to Fig.13 , Fig.13 Another cross-sectional view of a battery 100 provided in some embodiments of the present application along a first direction X. The battery 100 includes a plurality of battery cell groups 20 and a plurality of bus assemblies 30 , wherein the plurality of bus assemblies 30 are arranged at intervals along a third direction X, and a battery cell group 20 is arranged between two adjacent bus assemblies 30 .

[0159] Arranging the plurality of battery cell groups 20 in the battery 100 along the third direction X can improve the space utilization inside the box 10 , which is beneficial to improving the energy density of the battery 100 .

[0160] Along the third direction X, a battery cell group 20 is disposed between two adjacent bus assemblies 30 , thereby avoiding the existence of a plurality of bus assemblies 30 attached to each other, thus improving the space utilization rate in the box 10 and the utilization rate of the bus assemblies 30 .

[0161] According to some embodiments of the present application, continue to refer to Fig.13 , and please refer to Fig.14 and Fig.15 , Fig.14 This is a schematic diagram of the structure of the busbar assembly 30 provided in some embodiments of the present application after being installed on the partition 40. Fig.15 for Fig.13 The battery 100 further includes a plurality of separators 40, which are arranged in the box body 10 and spaced apart along the third direction X, and a battery cell group 20 is arranged between two adjacent separators 40. The separator 40 is an insulating member, one end of which is connected to the bottom wall 101, and the busbar assembly 30 is detachably mounted on the other end of the separator 40.

[0162] The separator 40 is used to separate the battery cell group 20 and connect the bottom wall 101 of the box body 10 and the busbar assembly 30 to facilitate the installation of the busbar assembly 30 .

[0163] It can be understood that the separator 40 is an insulating member to prevent arcing and fire between the battery cell groups 20 .

[0164] Optionally, the separator 40 can be selected from any one of organic polymer insulating materials or inorganic insulating materials; or, in some embodiments of the present application, the material of the separator 40 is selected from a mixture of organic polymer insulating materials and inorganic insulating materials, and the two can be mixed in any proportion.

[0165] Optionally, one end of the partition 40 may be fixed to the bottom wall 101 by screw connection; or, one end of the partition 40 may be connected to the bottom wall 101 by adhesive. The embodiments of the present application are not limited.

[0166] Optionally, the other end of the partition 40 may be detachably connected to the bus assembly 30 by means of a snap connection; or, the other end of the partition 40 may be detachably connected to the bus assembly 30 by means of a screw connection.

[0167] For example, Fig.14 As shown, the separator 40 also includes a limiter 43, one end of which passes through the bus assembly 30 along the second direction Y and is connected to the separator 40 to limit the bus assembly 30 between the other end of the limiter 43 and the separator 40 in the second direction Y.

[0168] Further, there are two limit members 43 , which are respectively located at two ends of the bus assembly 30 in the first direction X, so as to limit the movement of the bus assembly 32 in the first direction X and the third direction X relative to the partition 40 .

[0169] Furthermore, the limiting member 43 is a screw, and a through hole (not shown in the figure) is provided on the bus assembly 30 and passes through the bus assembly 30 along the second direction Y. One end of the limiting member 43 is connected to the through hole (not shown in the figure) on the bus assembly 30 and is fixed to the bus assembly 30 by a threaded connection.

[0170] It can be understood that when there is a gap between the end of the first positioning member (not shown in the figure) away from the protrusion (not shown in the figure) and the first surface (not shown in the figure) in the third direction X, and the end of the groove (not shown in the figure) away from the protrusion (not shown in the figure) passes through the second positioning member (not shown in the figure), the partition 40 can limit the busbar (not shown in the figure) from moving away from the bracket (not shown in the figure) along the second direction Y.

[0171] One end of the separator 40 is connected to the bottom wall 101, and the bus assembly 30 is detachably mounted on the other end of the separator 40. The bottom wall 101 can provide support to the bus assembly 30 through the separator 40, which is beneficial to improving the stability of the bus assembly 30 when the battery 100 is working. At the same time, the bus assembly 30 is detachably mounted on the other end of the separator 40, so that the bus assembly 30 can be removed from the separator 40, so that when the battery cell (not shown in the figure) needs to be replaced later, it is convenient to disassemble the battery cell (not shown in the figure), which is beneficial to improving the service life of the battery 100 and reducing the cost of assembling the battery 100.

[0172] According to some embodiments of the present application, continue to refer to Fig.14 , and please refer to Fig.15 and Fig.16 , Fig.16 The exploded view of the separator 40 and the thermal management component 41 provided in some embodiments of the present application. The battery 100 further includes the thermal management component 41, and along the third direction X, the thermal management component 41 is disposed between the separator 40 and the battery cell group 20.

[0173] The thermal management component 41 is used to adjust the temperature of the battery cell group 20. The thermal management component 41 can contain a fluid or a solid-liquid phase change material to adjust the temperature of multiple battery cells (not shown in the figure) in the battery cell group 20. Specifically, the fluid can be a liquid or a gas. The original state of the solid-liquid phase change material is solid, and it can become liquid after absorbing heat.

[0174] Adjusting the temperature refers to heating or cooling multiple battery cell groups 20. In the case of cooling or lowering the temperature of the battery cell group 20, the thermal management component 41 is used to contain a cooling fluid or a solid-liquid phase change material to lower the temperature of the battery cell group 20. At this time, the thermal management component 41 may also be referred to as a cooling component, a cooling system or a cooling plate, etc., and the fluid contained therein may also be referred to as a cooling medium or a cooling fluid, more specifically, a coolant or a cooling gas. In addition, the thermal management component 41 may also be used for heating to increase the temperature of the battery cell group 20, which is not limited in the embodiments of the present application. Optionally, the fluid may be circulating to achieve a better temperature regulation effect. Optionally, the fluid may be water, a mixture of water and ethylene glycol, or air, etc.

[0175] Optionally, the separator 40 has a receiving portion 401 on a side thereof facing the battery cell group (not shown in the figure) in the third direction X, and the receiving portion 401 is used to receive at least part of the thermal management component 41 .

[0176] In the third direction X, at least a portion of the thermal management component 41 is accommodated in the accommodating portion 401, which can reduce the size of the thermal management component 41 and the partition 40 in the third direction X, thereby reducing the internal space occupied by the thermal management component 41 and the partition 40 in the box (not shown in the figure), which is beneficial to improving the energy density of the battery (not shown in the figure).

[0177] Optionally, the battery (not shown in the figure) further includes a first connecting tube 411, which is used to connect the thermal management components 41 located on both sides of the same separator 40 in the third direction X. The fluid or solid-liquid phase change material can flow between the two thermal management components 41 through the first connecting tube 411.

[0178] For example, Fig.16 As shown, the first connecting tube 411 is bent, one end of the first connecting tube 411 is connected to any thermal management component 41, and the other end of the first connecting tube 411 bypasses the side of the partition 40 away from the bottom wall (not shown in the figure) and is connected to another thermal management component 41.

[0179] Furthermore, the first connecting tube 411 can be made of plastic, and the first connecting tube 411 can be connected to the thermal management component 41 by an adhesive; or, the first connecting tube 411 can also be connected to the thermal management component 41 by being integrally formed with the thermal management component 41, which is not limited to the embodiments of the present application.

[0180] Optionally, the battery (not shown in the figure) further includes a second connecting tube 412, which is used to connect the thermal management components 41 located on both sides of the same battery cell group (not shown in the figure) in the third direction X. The fluid or solid-liquid phase change material can flow between the two thermal management components 41 through the second connecting tube 412.

[0181] Furthermore, the second connecting tube 412 can be made of plastic, and the second connecting tube 412 can be connected to the thermal management component 41 by an adhesive; or, the second connecting tube 412 can also be connected to the thermal management component 41 by being integrally formed with the thermal management component 41, which is not limited to the embodiments of the present application.

[0182] It can be understood that the projection of the thermal management component 41 does not overlap with the projection of the busbar assembly 30 along the third direction X. This reduces the size of the thermal management component 41, the separator 40, and the busbar assembly 30 in the third direction X, thereby reducing the occupation of the internal space of the box (not shown in the figure) by the thermal management component 41, the separator 40, and the busbar assembly 30, which is beneficial to improving the energy density of the battery (not shown in the figure).

[0183] Along the third direction X, the thermal management component 41 is disposed between the separator 40 and the battery cell group 20 to adjust the temperature of the battery cell 21. At the same time, the thermal management component 41 can fully utilize the space of the box body 10 along the third direction X, which is beneficial to improving the space utilization rate in the box body 10 and increasing the energy density of the battery 100.

[0184] According to some embodiments of the present application, continue to refer to Fig.14 , and please refer to Fig.15 and Fig.16 The battery 100 further includes a first buffer member 42 , and along the third direction X, the first buffer member 42 is disposed between the separator 40 and the heat management component 41 .

[0185] The first buffer member 42 is a member that performs a buffering function between the partition member 40 and the heat management member 41 .

[0186] Optionally, the first buffer member 42 may be made of one or both of foam and insulating rubber.

[0187] Optionally, the first buffer member 42 may be connected to the partition member 40 and the thermal management component 41 by an adhesive; or, the first buffer member 42 may directly abut against the partition member 40 and the thermal management component 41, which is not limited in the embodiments of the present application.

[0188] Along the third direction X, the first buffer 42 is disposed between the separator 40 and the thermal management component 41. The separator 40 can provide the thermal management component 41 with a supporting force in the third direction X through the first buffer 42. The thermal management component 41 can then be attached to the battery cell group (not shown in the figure) in the third direction X, which not only increases the temperature regulation capability of the thermal management component 41 on the battery cell group (not shown in the figure), but also enables the thermal management component 41 to provide a certain restraining force to the battery cell group (not shown in the figure) in the third direction X, so as to limit the movement of the battery cell group (not shown in the figure) in the third direction X, thereby improving the stability of the connection between the electrode terminal (not shown in the figure) and the busbar assembly 30. At the same time, when the thermal management component 41 is subjected to pressure from the battery cell group 20 (not shown in the figure), the first buffer 42 can be compressed to reduce the occurrence of the situation where the thermal management component 41 is subjected to excessive pressure and is damaged.

[0189] According to some embodiments of the present application, referring to Fig.17 , Fig.17 The battery cell 21 is a schematic diagram of a structure of a battery cell 21 provided in some embodiments of the present application. The battery cell 21 further includes a pressure relief mechanism 212, which is disposed on one side of the battery cell 21 in the second direction Y, and the electrode terminals 211 are disposed on both sides of the battery cell 21 in the third direction X.

[0190] The pressure relief mechanism 212 refers to an element or component that is actuated to release the internal pressure or temperature when the internal pressure or temperature of the battery cell 21 reaches a predetermined threshold. The threshold design varies according to different design requirements. The threshold may depend on the material of the electrode assembly (not shown in the figure) in the battery cell 21. The pressure relief mechanism 212 can take the form of an explosion-proof valve, an explosion-proof disk, an air valve, a pressure relief valve or a safety valve, and can specifically adopt a pressure-sensitive or temperature-sensitive element or structure, that is, when the internal pressure or temperature of the battery cell 21 reaches a predetermined threshold, the pressure relief mechanism 212 performs an action or a weak structure provided in the pressure relief mechanism 212 is destroyed, thereby forming an opening or channel for the internal pressure or temperature to be released.

[0191] The "actuation" mentioned in this application means that the pressure relief mechanism 212 is in action or activated to a certain state, so that the internal pressure and temperature of the battery cell 21 can be released. The action produced by the pressure relief mechanism 212 may include but is not limited to: at least a part of the pressure relief mechanism 212 is broken, shattered, torn or opened, etc. When the pressure relief mechanism 212 is actuated, the high-temperature and high-pressure substances inside the battery cell 21 will be discharged from the actuated part as emissions. In this way, the battery cell 21 can be depressurized and cooled under controllable pressure or temperature, thereby avoiding potential more serious accidents.

[0192] The emissions from the battery cells 21 mentioned in the present application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode sheets, fragments of the isolation membrane, high-temperature and high-pressure gas generated by the reaction, flames, and the like.

[0193] The pressure relief mechanism 212 on the battery cell 21 has an important impact on the safety of the battery 100. For example, when a short circuit or overcharge occurs, thermal runaway may occur inside the battery cell 21, causing a sudden increase in pressure or temperature. In this case, the pressure relief mechanism 212 can be activated to release the internal pressure and temperature to the outside, thereby reducing the risk of explosion or fire of the battery cell 21.

[0194] The pressure relief mechanism 212 is disposed on one side of the battery cell 21 in the second direction Y, and the electrode terminals 211 are disposed on both sides of the battery cell 21 in the third direction X. In this way, when the battery cell 21 has thermal runaway, the discharge of the battery cell 21 discharged through the pressure relief mechanism 212 will be discharged in a direction away from the bus assembly (not shown in the figure), so the discharge is not easy to break through the bus assembly (not shown in the figure).

[0195] According to some embodiments of the present application, referring to Fig.18 , and further refer to Fig.19 and Fig. 20 as well as Fig.21 , Fig.18An exploded view of another battery 100 provided in some embodiments of the present application, Fig.19 A cross-sectional view of another battery 100 along a first direction X provided in some embodiments of the present application, Fig. 20 for Fig.19 The enlarged view of point E in the middle. Fig.21 for Fig.19 The box 10 has an opening 102, and the battery 100 further includes a cover 11, which covers the opening 102. A second buffer 12 is disposed between the box 10 and the battery cell group 20, and a third buffer 13 is disposed between the cover 11 and the battery cell group 20.

[0196] The cover 11 is a component for covering the opening 102 of the box body 10. The opening 102 is disposed on one side of the box body 10 in the second direction Y, so as to facilitate the removal of the busbar assembly 30 from the opening 102 along the second direction Y.

[0197] Understandably, referring to Fig.18 The cover body 11 and the box body 10 are buckled together along the second direction Y to form a closed chamber.

[0198] It can be understood that the shape of the cover 11 and the box 10 can be determined according to the shape of the battery cell group 20. For example, the box 10 and the cover 11 can both be rectangular prisms, and the battery cell group 20 and the busbar assembly 30 are combined and placed in a closed space formed by the box 10 and the cover 11.

[0199] The second buffer member 12 is a component that performs a buffering function between the bottom wall 101 and the battery cell group 20 .

[0200] Optionally, the second buffer member 12 may be made of one or both of foam and insulating rubber.

[0201] Optionally, the second buffer member 12 may be connected to the bottom wall 101 and the battery cell group 20 by an adhesive; or, the second buffer member 12 may directly abut against the bottom wall 101 and the battery cell group 20, which is not limited in the embodiments of the present application.

[0202] The third buffer member 13 is a component that performs a buffering function between the cover 11 and the battery cell group 20 .

[0203] Optionally, the third buffer member 13 may be made of one or both of foam or insulating rubber.

[0204] Understandably, if Fig.21 As shown, along the second direction Y, the projection of the pressure relief mechanism 212 does not overlap with the projection of the third buffer member 13 , so that the discharge of the battery cell 21 discharged through the pressure relief mechanism 212 is not easy to break through the second buffer member 12 .

[0205] The cover body 11 is connected via the third buffer member 13 , so that the battery cell group 20 can provide a supporting force to the cover body 11 via the third buffer member 13 , thereby increasing the strength of the cover body 11 .

[0206] According to some embodiments of the present application, referring to Figure 2 - Fig.21 The present application provides a battery 100, comprising a box 10, a cover 11, a battery cell group 20 and a busbar assembly 30. The battery cell group 20 is accommodated in the box 10, the box 10 has an opening 102, and the cover 11 covers the opening 102. A second buffer 12 is arranged between the box 10 and the battery cell group 20, and a third buffer 13 is arranged between the cover 11 and the battery cell group 20. A plurality of battery cell groups 20 and a plurality of busbar assemblies 30 are provided, and the plurality of busbar assemblies 30 are arranged at intervals along the third direction X, and a battery cell group 20 is arranged between two adjacent busbar assemblies 30. The battery 100 also includes a plurality of partitions 40, and the plurality of partitions 40 are arranged in the box 10 and are spaced along the third direction X, and a battery cell group 20 is arranged between two adjacent partitions 40. The partition 40 is an insulating member, one end of the partition 40 is connected to the bottom wall 101, and the busbar assembly 30 is detachably mounted on the other end of the partition 40. The battery 100 further includes a thermal management component 41 and a first buffer 42. Along the third direction X, the thermal management component 41 is disposed between the partition 40 and the battery cell group 20, and the first buffer 42 is disposed between the partition 40 and the thermal management component 41. The battery cell group 20 includes a plurality of battery cells 21 arranged along the first direction X. The bus assembly 30 includes a bracket 31 and a plurality of bus members 32. The bus member 32 is a bent structure, and the bus member 32 includes a connecting portion 321, two bus members 322, and two flanged portions 323. The connecting portion 321 connects the two bus members 322, and the two flanged portions 323 are respectively connected to one end of the two bus members 322 away from the connecting portion 321. The bracket 31 is an insulating member, and the bracket 31 includes a bracket body 311, a first positioning member 312, and a second positioning member 313. The first positioning member 312 is connected to the bracket body 311, and the connecting portion 321 is sandwiched between the first positioning member 312 and the first surface 311A ​​along the second direction Y. A plurality of second positioning members 313 are arranged at intervals on the first surface 311A ​​along the first direction X, and the busbar 32 is arranged between two adjacent second positioning members 313. A groove 313A is arranged on the side of the second positioning member 313, and at least a portion of the flange portion 323 is inserted into the groove 313A, so that each busbar portion 322 and the bracket 31 are enclosed to form a plug hole 33. At least a portion of the electrode terminal 211 is a bent sheet structure, and the above portion is inserted into the plug hole 33. The busbar 32 is used to realize the electrical connection of multiple battery cells 21.

[0207] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0208] The above embodiments are only used to illustrate the technical solution of the present application and are not used to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery, characterized in that: include: A battery cell group, comprising a plurality of battery cells arranged along a first direction; A busbar assembly, comprising a bracket and a plurality of busbars, wherein the bracket is an insulating member, the busbars are mounted on the bracket, and the busbars are used to realize electrical connection of the plurality of battery cells; Wherein, the battery cell includes an electrode terminal, and the electrode terminal is clamped with the busbar assembly.

2. The battery according to claim 1, characterized in that The battery further comprises a box body, the battery cell group is accommodated in the box body, and the box body has a bottom wall for supporting the battery cell group; The bottom wall is located on one side of the battery cell group in the second direction, the busbar assembly is located on the side of the battery cell group in the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

3. The battery according to claim 2, characterized in that Along the third direction, the busbar is arranged on a side of the bracket facing the battery cell group; At least a portion of the electrode terminal is interposed between the current bus and the bracket and contacts the current bus.

4. The battery according to claim 3, characterized in that The busbar and the bracket are combined to form an insertion hole, and at least a portion of the electrode terminal is inserted into the insertion hole.

5. The battery according to claim 4, characterized in that The insertion direction of the electrode terminal and the insertion hole is parallel to the second direction.

6. The battery according to claim 4, characterized in that The busbar is a bent structure, comprising a connecting portion and two busbars, the connecting portion connecting the two busbars, and each busbar and the bracket enclose one of the jacks.

7. The battery according to claim 6, characterized in that The bracket comprises a bracket body and a first positioning member, the confluence member is arranged on a first surface of the bracket body, and the insertion hole is formed between the confluence portion and the first surface; The first positioning member is connected to the bracket body, and along the second direction, the connecting portion is sandwiched between the first positioning member and the first surface.

8. The battery according to claim 7, characterized in that The collector also includes two flanged portions, which are respectively connected to one end of the two collectors facing away from the connecting portion, and the flanged portions and the connecting portion are both in contact with the first surface.

9. The battery according to claim 8, characterized in that The bracket also includes a plurality of second positioning members, which are arranged on the first surface at intervals along the first direction, and the collector is arranged between two adjacent second positioning members. A groove is arranged on the side of the second positioning member, and at least a part of the flange portion is inserted into the groove.

10. The battery according to claim 3, characterized in that At least a portion of the electrode terminal is a bent sheet-like structure.

11. The battery according to any one of claims 2 to 10, characterized in that: The battery comprises a plurality of battery cell groups and a plurality of busbar assemblies; A plurality of the busbar assemblies are arranged at intervals along the third direction, and one battery cell group is arranged between two adjacent busbar assemblies.

12. The battery according to claim 11, characterized in that The battery further comprises a plurality of separators, the plurality of separators are arranged in the box and are spaced apart along the third direction, and one battery cell group is arranged on two adjacent separators; The partition is an insulating member, one end of the partition is connected to the bottom wall, and the busbar assembly is detachably mounted on the other end of the partition.

13. The battery according to claim 12, characterized in that The battery further includes a heat management component disposed between the separator and the battery cell group along the third direction.

14. The battery according to claim 13, characterized in that The battery further includes a first buffer member disposed between the separator and the heat management component along the third direction.

15. The battery according to any one of claims 2 to 10, characterized in that: The battery cell further includes a pressure relief mechanism, which is disposed on one side of the battery cell in the second direction, and the electrode terminals are disposed on both sides of the battery cell in the third direction.

16. The battery according to claim 15, characterized in that The box body has an opening, and the battery further includes a cover body, and the cover body covers the opening; A second buffer is disposed between the box body and the battery cell group, and a third buffer is disposed between the cover body and the battery cell group.

17. An electrical equipment, characterized in that: The invention comprises a battery as claimed in any one of claims 1 to 16, wherein the battery is used to provide electrical energy.

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