CN219779143U

CN219779143U - Battery module, battery pack, and power consumption device

Info

Publication number: CN219779143U
Application number: CN202321646531.9U
Authority: CN
Inventors: 梁士杰
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2023-06-27
Filing date: 2023-06-27
Publication date: 2023-09-29
Anticipated expiration: 2033-06-27

Abstract

The application discloses a battery module, a battery pack and an electric device. The battery module includes a first end plate, a second end plate, a plurality of battery cells, and a harness plate assembly. The first end plate and the second end plate are disposed at intervals along the first direction. The plurality of battery cells are disposed between the first end plate and the second end plate. The wire harness plate assembly is arranged on one side of the plurality of battery cells along a second direction, and the second direction is intersected with the first direction. The wire harness board assembly comprises a circuit board and a connector, wherein the circuit board is electrically connected to at least part of the plurality of battery cells, the connector is arranged at one end, close to the first end plate, of the circuit board along a first direction, and the plugging structure of the connector faces the second end plate along the first direction.

Description

Battery module, battery pack, and power consumption device

Technical Field

The present application relates to the field of batteries, and in particular, to a battery module, a battery pack, and an electric device.

Background

Battery packs are widely used in electronic devices such as cellular phones, notebook computers, battery cars, electric vehicles, electric airplanes, electric ships, electric toy vehicles, electric toy ships, electric toy airplanes, electric tools, and the like.

In the development of battery technology, how to increase space utilization is one of the research directions in battery technology.

Disclosure of Invention

The utility model provides a battery module, a battery pack and an electric device, which can improve space utilization.

In a first aspect, the present utility model provides a battery module including a first end plate, a second end plate, a plurality of battery cells, and a harness plate assembly. The first end plate and the second end plate are disposed at intervals along the first direction. The plurality of battery cells are disposed between the first end plate and the second end plate. The wire harness plate assembly is arranged on one side of the plurality of battery cells along a second direction, and the second direction is intersected with the first direction. The wire harness board assembly comprises a circuit board and a connector, wherein the circuit board is electrically connected to at least part of the plurality of battery cells, the connector is arranged at one end, close to the first end plate, of the circuit board along a first direction, and the plugging structure of the connector faces the second end plate along the first direction.

The plug-in structure of the connector faces the second end plate along the first direction, and the wire harness connected with the plug-in structure of the connector can be arranged between the first end plate and the second end plate, so that the space of the circuit board on the side away from the battery unit can be fully utilized, the maximum size of the battery module and the wire harness in the first direction is reduced, the space is saved in the first direction, and the space utilization rate and the energy density of the battery pack are improved. According to the embodiment of the utility model, the space can be saved in the first direction by adjusting the position of the connector and the orientation of the plugging structure of the connector, so that the battery module is adapted to a battery pack or an electric device with strict size requirements in the first direction.

In some embodiments, the connector does not extend beyond the first end plate in a direction away from the second end plate and parallel to the first direction, so that the connector does not additionally increase the size of the battery module in the first direction, thereby improving space utilization.

In some embodiments, the connector is connected to the first end plate. When the battery module receives external impact, the first end plate can limit the connector, reduces the amplitude that the connector rocked, reduces the risk of tearing of the joint of the connector and the circuit board, and improves the reliability of the battery module.

In some embodiments, the battery module further includes a protection plate disposed on a side of the circuit board facing away from the battery cells. The guard plate is connected to the first end plate and the second end plate.

When thermal runaway appears in the battery monomer, the guard plate can block the high temperature high-speed material that the battery monomer released, reduces the thermal shock that the box of battery package received, reduces the damaged risk of box, improves the reliability of battery package. The first end plate and the second end plate can fix the protection plate, and the risk that the protection plate deflects under the impact of high-temperature high-speed substances is reduced.

In some embodiments, the connector is disposed on a side of the circuit board facing the shield plate. The guard plate is equipped with and dodges the structure, dodges the structure and be used for dodging the connector. Through set up on the guard plate and dodge the structure to expose the connector, be convenient for pencil and connector connection, reduce the risk that guard plate and pencil interfere.

In some embodiments, a shield plate is secured to one of the first end plate and the second end plate, the shield plate being movably connected to the other of the first end plate and the second end plate in the first direction.

The battery cell expands during charging, and the expanded battery cell presses the first end plate and the second end plate to cause relative displacement of the first end plate and the second end plate in a first direction. In the embodiment of the application, one of the first end plate and the second end plate is movably connected with the protection plate, and when the first end plate and the second end plate are subjected to relative displacement, the first end plate or the second end plate can move relative to the protection plate, so that the tensile force or the compressive force born by the protection plate is reduced, the risk of cracking of the protection plate is reduced, and the reliability of the battery module is improved.

In some embodiments, the shield plate is provided with a guide slot extending through the shield plate in the second direction. The battery module also includes a fixture including a stem and a flange surrounding the stem. The rod portion passes through the guide groove in the second direction and is connected to the second end plate, and a portion of the shielding plate is located between the second end plate and the flange in the second direction. In the first direction, the guide slot has a dimension greater than the dimension of the stem.

The flange and the second end plate can clamp the protection plate in the second direction so as to limit the protection plate in the second direction, and the risk that the protection plate is separated from the second end plate is reduced. When the first end plate and the second end plate are subjected to relative displacement due to expansion of the battery monomers, the rod part can slide in the guide groove, so that the force applied to the protection plate by the fixing piece and the second end plate along the first direction is reduced, the risk of cracking of the protection plate is reduced, and the reliability of the battery module is improved.

In some embodiments, the guide slot extends in a first direction to an edge of the shield plate and forms an opening.

Under the premise that the relative movement range of the rod part and the protection plate along the first direction meets the requirement, one end of the guide groove is opened to form an opening, so that the maximum size of the guide groove along the first direction can be reduced, namely the space requirement of the guide groove on the first direction is reduced, and the battery module is adapted to a battery pack or an electric device with strict size requirement on the first direction.

In a second aspect, embodiments of the present application provide a battery pack including the battery module provided in any one of the embodiments of the first aspect and a bus member. The harness plate assembly further includes an output pole piece electrically connected to the plurality of battery cells of the battery module, at least a portion of the output pole piece being located on one side of the second end plate in the second direction. The converging component is electrically connected to the output pole piece.

The output pole pieces and the connectors are arranged at two opposite ends of the battery module, so that the distance between the bus component and the wire harness can be increased, and the interference between high-voltage and low-voltage lines is reduced.

In some embodiments, the converging component does not exceed the second end plate along a direction away from the first end plate and parallel to the first direction, so that the converging component shares space with the battery module in the first direction, thereby improving space utilization and reducing the requirement of the battery pack for the size of the first direction.

In some embodiments, a portion of the output pole piece and a portion of the bus member are stacked on and connected to the second end plate in the second direction.

The second end plate can support and fix the output pole piece and the converging component, so that the stability of connection of the output pole piece and the converging component is improved, and the risk of failure when the battery pack is subjected to external impact is reduced. The output pole piece and the converging part can utilize the space of one side of the second end plate along the second direction, so that the space additionally occupied by the output pole piece and the converging part along the first direction is reduced.

In some embodiments, the battery pack includes at least two battery modules arranged in a third direction, the first direction, the second direction, and the third direction being perpendicular to each other. The bus bar member is connected to the output pole pieces of two battery modules adjacent in the third direction.

In a third aspect, an embodiment of the present application provides an electrical device, including a battery module provided in any one of the embodiments of the first aspect, where the battery module is configured to provide electrical energy.

In a fourth aspect, an embodiment of the present application provides an electrical device, including a battery pack provided by any one of the embodiments of the second aspect, where the battery pack is configured to provide electrical energy.

Drawings

Features, advantages, and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic illustration of a vehicle according to some embodiments of the present application;

fig. 2 is an exploded view of a battery according to some embodiments of the present application;

fig. 3 is a schematic structural view of a battery module according to some embodiments of the present application;

FIG. 4 is an enlarged schematic view of FIG. 3 at the circle;

fig. 5 is a schematic view of a battery module according to other embodiments of the present application;

FIG. 6 is an enlarged schematic view of FIG. 5 at circle A;

FIG. 7 is an enlarged schematic view of FIG. 5 at circle B;

FIG. 8 is a schematic view of the fender shown in FIG. 5;

FIG. 9 is an enlarged schematic view of FIG. 8 at the circle;

fig. 10 is a schematic view, partially in section, of a battery module at a mount provided in some embodiments of the application;

FIG. 11 is a schematic illustration of a battery pack according to some embodiments of the present application;

Fig. 12 is an enlarged schematic view of fig. 11 at a circle.

In the drawings, the drawings are not necessarily to scale.

The reference numerals are as follows:

1. a vehicle; 2. a battery pack; 3. a controller; 4. a motor; 5. a case; 5a, a first box body part; 5b, a second box body part; 5c, an accommodating space; 6. a battery module; 7. a confluence member; 8. a wire harness; 8a, mating connectors; 8b, a wire harness main body; 9. a protective cover; 9a, a channel;

10. a battery cell; 20. a first end plate; 30. a second end plate;

40. a harness plate assembly; 41. a circuit board; 42. a connector; 421. a plug-in structure; 43. a partition plate; 44. a busbar; 45. nickel flakes; 46. outputting a pole piece;

50. a tie;

60. a protection plate; 61. an avoidance structure; 62. a guide groove; 621. an opening;

70. a fixing member; 71. a stem portion; 72. a flange;

x, a first direction; z, the second direction; y, third direction.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "attached" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

The term "and/or" in the present application is merely an association relation describing the association object, and indicates that three kinds of relations may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In the present application, the character "/" generally indicates that the front and rear related objects are an or relationship.

In the embodiments of the present application, the same reference numerals denote the same components, and detailed descriptions of the same components are omitted in different embodiments for the sake of brevity. It should be understood that the thickness, length, width, etc. dimensions of the various components in the embodiments of the application shown in the drawings, as well as the overall thickness, length, width, etc. dimensions of the integrated device, are merely illustrative and should not be construed as limiting the application in any way.

In embodiments of the present application, "parallel" includes not only the case of absolute parallelism, but also the case of substantially parallelism that is conventionally recognized in engineering; meanwhile, "vertical" includes not only the case of absolute vertical but also the case of substantially vertical as conventionally recognized in engineering. Illustratively, the angle between the two directions is 85 ° -90 °, which can be considered to be perpendicular; the included angle between the two directions is 0-5 degrees, and the two directions can be considered to be parallel.

The term "plurality" as used herein refers to two or more (including two).

In the embodiment of the application, the battery cell can be a secondary battery cell, and the secondary battery cell refers to a battery cell which can activate the active material in a charging mode to continue to use after the battery cell discharges.

The battery cell may be a lithium ion battery cell, a sodium lithium ion battery cell, a lithium metal battery cell, a sodium metal battery cell, a lithium sulfur battery cell, a magnesium ion battery cell, a nickel hydrogen battery cell, a nickel cadmium battery cell, a lead storage battery cell, etc., which is not limited by the embodiment of the application.

The battery cell generally includes an electrode assembly. Illustratively, the electrode assembly includes a positive electrode sheet, a negative electrode sheet, and a separator. During the charge and discharge of the battery cell, active ions (e.g., lithium ions) are inserted and extracted back and forth between the positive electrode sheet and the negative electrode sheet. The separator is arranged between the positive plate and the negative plate, can play a role in preventing the positive plate and the negative plate from being short-circuited, and can enable active ions to pass through.

A battery pack is a single physical module that includes multiple battery cells to provide higher voltage and capacity.

In some embodiments, the battery pack includes one or more battery modules including a plurality of battery cells arranged and secured.

In some embodiments, the battery pack further includes a case in which the battery module is accommodated.

In some embodiments, the tank may be part of the chassis structure of the vehicle. For example, a portion of the tank may become at least a portion of the floor of the vehicle, or a portion of the tank may become at least a portion of the cross member and the side member of the vehicle.

The safety performance of the battery cell directly affects the reliability of the whole battery module, so that the working condition of the battery cell needs to be monitored in real time. Typically, a harness board assembly is provided in the battery module, and a circuit board of the harness board assembly may enable sampling of electrical signals and/or temperature signals of the battery cells.

In the sampling process, in order to realize information interaction between the circuit board and the outside (such as a battery management control system (BMS)), a connector needs to be arranged on the circuit board. On the one hand, the connector is arranged on the circuit board and is electrically connected with the wires on the circuit board, and on the other hand, the connector needs to be connected with the wire harness so as to realize information interaction with external equipment.

In the battery pack, the position arrangement of the wire harness is affected by the position of the connector; how to simplify the arrangement of the wire harness in the battery pack and improve the space utilization rate by arranging the connectors is an important research direction in the field of batteries.

In view of the above, embodiments of the present application provide a battery module that simplifies the arrangement of the wire harness in the battery pack and improves the space utilization by adjusting the position of the connector and the orientation of the insertion structure of the connector.

The battery module described in the embodiment of the application is suitable for a battery pack and an electric device using the battery pack.

The electric device may be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, or the like. The vehicle can be a fuel oil vehicle, a fuel gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle; spacecraft including airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete shakers, and electric planers, among others. The embodiment of the application does not limit the electric device in particular.

Fig. 1 is a schematic structural diagram of a vehicle according to some embodiments of the present application.

As shown in fig. 1, the inside of the vehicle 1 is provided with a battery pack 2, and the battery pack 2 may be provided at the bottom or at the head or at the tail of the vehicle 1. The battery pack 2 may be used for power supply of the vehicle 1, for example, the battery pack 2 may serve as an operating power source of the vehicle 1.

The vehicle 1 may further comprise a controller 3 and a motor 4, the controller 3 being arranged to control the battery pack 2 to power the motor 4, for example for operating power requirements during start-up, navigation and driving of the vehicle 1.

In some embodiments of the application, the battery pack 2 may not only serve as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, instead of or in part instead of fuel oil or natural gas, to provide driving power for the vehicle 1.

Fig. 2 is an exploded view of a battery according to some embodiments of the present application.

As shown in fig. 2, the battery pack 2 includes a case 5 and a battery cell (not shown) housed in the case 5. The battery cell may be the smallest unit constituting the battery.

The case 5 is used to accommodate the battery cells, and the case 5 may have various structures. In some embodiments, the case 5 may include a first case portion 5a and a second case portion 5b, the first case portion 5a and the second case portion 5b being overlapped with each other, the first case portion 5a and the second case portion 5b together defining an accommodating space 5c for accommodating the battery cell. The second case portion 5b may be a hollow structure having one end opened, the first case portion 5a is a plate-like structure, and the first case portion 5a is covered on the opening side of the second case portion 5b to form a case 5 having an accommodation space 5 c; the first housing part 5a and the second housing part 5b may each be a hollow structure having one side opened, and the opening side of the first housing part 5a is closed to the opening side of the second housing part 5b to form the housing 5 having the accommodation space 5c. Of course, the first and second case portions 5a and 5b may be of various shapes, such as a cylinder, a rectangular parallelepiped, or the like.

In order to improve the sealing property after the first casing part 5a and the second casing part 5b are connected, a sealing member, such as a sealant, a seal ring, or the like, may be provided between the first casing part 5a and the second casing part 5 b.

Assuming that the first housing part 5a is covered on top of the second housing part 5b, the first housing part 5a may also be referred to as an upper case cover, and the second housing part 5b may also be referred to as a lower case.

In the battery pack 2, the battery cells may be plural. The plurality of battery cells can be connected in series or in parallel or in series-parallel connection, and the series-parallel connection refers to that the plurality of battery cells are connected in series or in parallel. Illustratively, a plurality of battery cells are connected in series or parallel or in series-parallel to form a battery module 6, and then the plurality of battery modules 6 are connected in series or parallel or in series-parallel to form a whole and are accommodated in the case 5.

Fig. 3 is a schematic structural view of a battery module according to some embodiments of the present application; fig. 4 is an enlarged schematic view of fig. 3 at a circle.

As shown in fig. 3 and 4, the battery module 6 of the embodiment of the present application includes a first end plate 20, a second end plate 30, a plurality of battery cells 10, and a harness plate assembly 40. The first end plate 20 and the second end plate 30 are disposed at intervals along the first direction X. The plurality of battery cells 10 are disposed between the first end plate 20 and the second end plate 30. The harness plate assembly 40 is provided at one side of the plurality of battery cells 10 in a second direction Z, which intersects the first direction X. The harness board assembly 40 includes a circuit board 41 electrically connected to at least part of the plurality of battery cells 10, and a connector 42 provided at an end of the circuit board 41 near the first end plate 20 in the first direction X, and a plug structure 421 of the connector 42 faces the second end plate 30 in the first direction X.

The first and second end plates 20 and 30 may sandwich the plurality of battery cells 10 from both sides of the first direction X to fix the plurality of battery cells 10.

The first end plate 20 may be a unitary structure or a structure formed by splicing a plurality of independently formed sub-members.

The second end plate 30 may be an integral structure or a structure formed by splicing a plurality of independently formed sub-members.

Between the first end plate 20 and the second end plate 30, a plurality of battery cells 10 may be arranged in a single row or in a plurality of rows. In other words, the battery module 6 includes at least one battery string including a plurality of battery cells 10 arranged in the first direction X; in the first direction X, the cell rows are located between the first end plate 20 and the second end plate 30. In some examples, the battery module 6 includes one battery column; in another example, the battery module 6 includes a plurality of battery columns arranged in the third direction Y; alternatively, the first direction X, the second direction Z, and the third direction Y are perpendicular to each other.

The circuit board 41 is a provider of electrical connections for the electronic components. The circuit board 41 may include a flexible circuit board (Flexible Printed Circuit, FPC). Alternatively, the circuit board may also comprise a rigid printed circuit board (Printed Circuit Board, PCB).

As an example, the circuit board 41 may include a flexible circuit board. The flexible circuit board enables the circuit to be miniaturized and visualized, and plays an important role in mass production of fixed circuits and optimization of the layout of electrical appliances. The flexible circuit board is a circuit board which is made of polyimide or polyester film as a base material and has the characteristics of high reliability and flexibility, high wiring density, light weight, thin thickness and good flexibility. The flexible circuit board has the working principle that the insulating material is utilized to isolate the copper foil conductive layer on the surface, so that current flows in various components along a pre-designed line to realize functions such as work doing, amplifying, attenuating, modulating, demodulating, encoding and the like. Flexible circuit boards have single, double, and multiple layer board divisions. The surface layer and the inner layer conductors of the double-sided and multi-layer flexible circuit board realize the electric connection of the inner and outer layer circuits through metallization.

The harness board assembly 40 includes one or more circuit boards 41. Illustratively, the number of the circuit boards 41 may be the same as the number of the battery strings, and the circuit boards 41 are disposed corresponding to the battery strings in the second direction Z.

The circuit board 41 may be electrically connected to each of the battery cells 10 of the battery module 6, or may be electrically connected to only a portion of the battery cells 10.

Connector 42 may be a connector that refers to a component that connects two active devices and transmits current and/or signals between the two active devices. Specifically, a plug connector having pins is mounted on one active device, and a receptacle connector having sockets is mounted on the other active device. The plug connector and the socket connector can be plugged to realize connection of two active devices.

The connector 42 of the harness board assembly 40 may be a plug connector or a receptacle connector. The mating structure 421 of the connector 42 may depend on the type of connector 42.

As an example, the connector 42 of the harness plate assembly 40 is a receptacle connector, and the plug structure 421 of the connector 42 includes a socket; the connector 42 of the harness plate assembly 40 is provided with a socket at a side facing the second end plate 30 in the first direction X.

As an example, the connector 42 of the harness board assembly 40 is a plug connector, and the plugging structure 421 of the connector 42 includes a pin; the connector 42 of the harness plate assembly 40 is provided with pins at a side facing the second end plate 30 in the first direction X.

The harness board assembly 40 includes one or more circuit boards 41, each circuit board 41 having at least one connector 42 mounted thereon. If the wire harness plate assembly 40 includes a plurality of connectors 42, the plurality of connectors 42 may be identical or different in form.

As an example, the harness board assembly 40 includes two circuit boards 41, one connector 42 mounted on each circuit board 41. The two connectors 42 may be plug connectors, socket connectors, or both plug connectors and socket connectors, respectively.

In the embodiment of the present application, the plugging structure 421 of the connector 42 faces the second end plate 30 along the first direction X, and the wire harness connected to the plugging structure 421 of the connector 42 can be arranged between the first end plate 20 and the second end plate 30, so that the space on the side of the circuit board 41 facing away from the battery cell 10 can be fully utilized, and the maximum size of the battery module 6 and the wire harness in the first direction X can be reduced, thereby saving space in the first direction X and improving space utilization and energy density of the battery pack.

According to the embodiment of the application, by adjusting the position of the connector 42 and the orientation of the plugging structure 421 of the connector 42, space can be saved in the first direction X, so that the battery module 6 is adapted to a battery pack or an electric device with strict requirements on the size of the first direction X.

In some embodiments, the dimension of the battery module 6 in the first direction X is greater than the dimension of the battery module 6 in the second direction Z, and the dimension of the battery module 6 in the first direction X is greater than the dimension of the battery module 6 in the third direction Y.

The first direction X may be the length direction of the battery module 6, which may save space in the length direction, so that the battery module 6 is adapted to a battery pack or an electric device with strict requirements on the dimension in the length direction.

In some embodiments, the battery module 6 further includes a tie 50, the tie 50 encircling the first end plate 20, the plurality of battery cells 10, and the second end plate 30 as a unit to secure the first end plate 20, the plurality of battery cells 10, and the second end plate 30 together. Alternatively, the battery module 6 includes two side plates (not shown), each of which connects the first and second end plates 20 and 30, and the first end plate 20, the two side plates, and the second end plate 30 are enclosed to form a frame body that surrounds and fixes the plurality of battery cells 10.

In some embodiments, the harness board assembly 40 further includes a spacer 43, and the circuit board 41 is mounted to the spacer 43. The spacer 43 may be used to carry the circuit board 41 and other related components. As an example, a separator 43 is used to separate some components from the battery cell 10 to reduce the risk of short circuits.

In some embodiments, the harness plate assembly 40 further includes a plurality of buss bars 44, the plurality of buss bars 44 for connecting to the plurality of battery cells 10 to connect the plurality of battery cells 10 in series, parallel, or series-parallel.

A plurality of bus bars 44 may be fixed to the partition plate 43. Alternatively, the bus bar 44 is clamped to the partition plate 43.

The separator 43 may carry the bus bars 44 to reduce the risk of shorting the bus bars 44 to the battery cells 10 due to abnormal falling, deformation, etc.

In some embodiments, the spacer 43 is an insulator.

In some embodiments, circuit board 41 is provided with wires (not shown) having one end electrically connected to bus 44 to collect electrical signals and/or temperature signals on bus 44; the other end of the wire is connected to the connector 42 to transmit the acquired signal to the connector 42.

In some embodiments, the harness plate assembly 40 further includes a nickel tab 45, the nickel tab 45 being used to electrically connect the circuit board 41 and the buss bar 44.

In some embodiments, the connector 42 does not extend beyond the first end plate 20 in a direction away from the second end plate 30 and parallel to the first direction X.

The embodiment of the application can make the connector 42 not to additionally increase the size of the battery module 6 in the first direction X, thereby improving the space utilization.

In some embodiments, the connector 42 is connected to the first end plate 20.

The connector 42 may be directly connected to the first end plate 20 or may be indirectly connected to the first end plate 20 through other components.

When the battery module 6 is subjected to external impact, the first end plate 20 can limit the connector 42, reduce the shaking amplitude of the connector 42, reduce the risk of tearing at the joint of the connector 42 and the circuit board 41, and improve the reliability of the battery module 6.

In some embodiments, the first end plate 20 is used to support the connector 42.

In some embodiments, the projection of the connector 42 in the second direction Z is within the projection of the first end plate 20 in the second direction Z.

The connector 42 shares part of the space with the first end plate 20 in the first direction X and the third direction Y, thereby reducing the maximum size of the battery module 6 in the first direction X and the maximum size of the battery module 6 in the third direction Y.

In some embodiments, the battery module 6 includes two battery columns; the harness board assembly 40 includes two circuit boards 41, and one connector 42 is mounted on each circuit board 41. Alternatively, two connectors 42 are arranged along the third direction Y.

Fig. 5 is a schematic view of a battery module according to other embodiments of the present application; FIG. 6 is an enlarged schematic view of FIG. 5 at circle A; FIG. 7 is an enlarged schematic view of FIG. 5 at circle B; FIG. 8 is a schematic view of the fender shown in FIG. 5; FIG. 9 is an enlarged schematic view of FIG. 8 at the circle; fig. 10 is a schematic view, partially in section, of a battery module provided in some embodiments of the application.

Referring to fig. 5 to 10, in some embodiments, the battery module 6 further includes a shielding plate 60, and the shielding plate 60 is disposed at a side of the circuit board 41 facing away from the battery cells 10. The shielding plate 60 is connected to the first and second end plates 20 and 30.

When a short circuit, overcharge, etc. occur, thermal runaway may occur inside the battery cell 10 and thus the pressure may rise suddenly. In this case, the pressure release mechanism of the battery cell 10 releases the high-temperature and high-speed substances outwards, so as to reduce the risks of explosion and fire of the battery cell 10. The protection plate 60 can block high-temperature and high-speed substances discharged by the battery cell 10, reduce thermal shock to the box body of the battery pack, reduce the risk of damage to the box body, and improve the reliability of the battery pack. The first end plate 20 and the second end plate 30 may fix the shielding plate 60, reducing the risk of the shielding plate 60 being deflected by the impact of high temperature and high velocity substances.

In some embodiments, the material of the shielding plate 60 includes at least one of inorganic salts, inorganic ceramics, elemental metals, and elemental carbon.

In some examples, the inorganic salt includes a silicate.

In some examples, the inorganic ceramic includes at least one of aluminum oxide, silicon oxide, boron carbide, boron nitride, silicon carbide, silicon nitride, and zirconium oxide.

In some examples, the elemental metallic material includes at least one of copper, iron, aluminum, tungsten, and titanium.

In some examples, the elemental carbon includes at least one of amorphous carbon and graphite.

In some embodiments, the shield 60 is a mica board.

In some embodiments, the melting point of the shield 60 is greater than 1000 ℃. The protection plate 60 has a high melting point, and is not easy to melt when being subjected to thermal shock, so that the protection plate 60 has good thermal shock resistance, and the risk of punching through the protection plate 60 is reduced.

In some embodiments, in the second direction Z, the protection plate 60 covers the pressure relief mechanisms of all the battery cells 10 of the battery module 6.

In some embodiments, in the second direction Z, the shielding plate 60 covers the isolation plate 43. Optionally, the circuit board 41 is located between the shielding plate 60 and the isolation plate 43.

In some embodiments, the connector 42 is disposed on a side of the circuit board 41 facing the shield plate 60. The protection plate 60 is provided with a relief structure 61, the relief structure 61 being used for relieving the connector 42.

The relief structure 61 includes at least one of a hole, a slot, and a notch.

By providing the avoidance structure 61 on the protection plate 60 to expose the connector 42, the harness is convenient to connect with the connector 42, and the risk of interference between the protection plate 60 and the harness is reduced.

In some embodiments, the relief structures 61 are the same number as the connectors 42 and are arranged in a one-to-one correspondence.

In some embodiments, relief structure 61 includes a groove.

In some embodiments, a shield plate 60 is fixed to one of the first and second end plates 20, 30, the shield plate 60 being movably connected to the other of the first and second end plates 20, 30 along the first direction X.

In some examples, one end of the shielding plate 60 in the first direction X is fixed to the first end plate 20, and the other end of the shielding plate 60 in the first direction X is movably connected to the second end plate 30. Alternatively, one end of the shielding plate 60 in the first direction X is movably connected to the first end plate 20, and the other end of the shielding plate 60 in the first direction X is fixed to the second end plate 30.

The battery cell 10 expands during charging, and the expanded battery cell 10 presses the first and second end plates 20 and 30 such that the first and second end plates 20 and 30 are relatively displaced in the first direction X. In the embodiment of the present application, one of the first end plate 20 and the second end plate 30 is movably connected to the protection plate 60, and when the first end plate 20 and the second end plate 30 are relatively displaced, the first end plate 20 or the second end plate 30 can move relative to the protection plate 60, thereby reducing the tensile force or the compressive force applied to the protection plate 60, reducing the risk of the protection plate 60 cracking, and improving the reliability of the battery module 6.

In some embodiments, the shielding plate 60 is provided with a guide groove 62, the guide groove 62 penetrating the shielding plate 60 in the second direction Z. The battery module 6 further includes a fixing member 70, the fixing member 70 including a stem 71 and a flange 72, the flange 72 surrounding the stem 71. The rod portion 71 passes through the guide groove 62 in the second direction Z and is connected to the second end plate 30, and a portion of the shielding plate 60 is located between the second end plate 30 and the flange 72 in the second direction Z. In the first direction X, the guide groove 62 has a size larger than that of the lever portion 71.

The shielding plate 60 is fixed to the first end plate 20. Illustratively, the shield 60 is secured to the first end plate 20 by fasteners.

Alternatively, the second direction Z is parallel to the thickness direction of the shielding plate 60.

The battery module 6 may include one or more fixtures 70. Alternatively, the fixing members 70 are the same in number as the guide grooves 62 and are provided correspondingly.

The flange 72 and the second end plate 30 may clamp the shield plate 60 in the second direction Z to limit the shield plate 60 in the second direction Z, reducing the risk of the shield plate 60 coming off the second end plate 30. When the first and second end plates 20 and 30 are relatively displaced due to the expansion of the battery cells 10, the rod portion 71 may slide in the guide groove 62, thereby reducing the force applied to the protection plate 60 by the fixing member 70 and the second end plate 30 in the first direction X, reducing the risk of the protection plate 60 being broken, and improving the reliability of the battery module 6.

In some alternative embodiments, the stem 71 passes through the guide slot 62 and is connected to the first end plate 20 in the second direction Z, with a portion of the shield plate 60 being located between the first end plate 20 and the flange 72 in the second direction Z. The shielding plate 60 is fixedly coupled to the second end plate 30.

In some embodiments, the stem 71 may be welded, glued, bolted, riveted, or otherwise connected to the second end plate 30.

In some embodiments, the plurality of fixing members 70 is a plurality, and the plurality of fixing members 70 are spaced apart along the third direction Y. The plurality of fixing members 70 may improve the stability of the connection of the shielding plate 60 with the second end plate 30.

In some embodiments, the guide groove 62 extends to an edge of the shielding plate 60 in the first direction X and forms an opening 621. The opening 621 is formed at an edge of the shielding plate 60 away from the first end plate 20 in the first direction X.

On the premise that the relative movable range of the rod portion 71 and the protection plate 60 along the first direction X meets the requirement, the opening 621 is formed by opening one end of the guide groove 62, so that the maximum size of the guide groove 62 along the first direction X can be reduced, that is, the space requirement of the guide groove 62 on the first direction X is reduced, and the battery module 6 is adapted to a battery pack or an electric device with strict requirement on the size of the first direction X.

In some embodiments, the guide slot 62 is a U-shaped slot.

FIG. 11 is a schematic illustration of a battery pack according to some embodiments of the present application; fig. 12 is an enlarged schematic view of fig. 11 at a circle.

Referring to fig. 5, 7 and 11-12, a battery pack 2 according to an embodiment of the present application includes a battery module 6 and a bus member 7. The harness plate assembly 40 further includes an output pole piece 46, the output pole piece 46 being electrically connected to the plurality of battery cells 10 of the battery module 6, at least a portion of the output pole piece 46 being located on one side of the second end plate 30 in the second direction Z. The bus member 7 is electrically connected to the output pole piece 46.

The battery pack 2 may include one or more battery modules 6.

The output tab 46 may be an electrode lead-out structure of the battery module 6. Upon discharge, the plurality of battery cells 10 of the battery module 6 output electric energy to the outside through the output pole piece 46; during charging, an external power source charges the plurality of battery cells 10 of the battery module 6 through the output pole piece 46.

Illustratively, there may be two output pole pieces 46, one output pole piece 46 being the total positive output pole of the battery module 6 and the other output pole piece 46 being the total negative output pole of the battery module 6. Optionally, at least one output pole piece 46 is connected with a bus member 7.

The bus member 7 may be used to electrically connect the output pole piece 46 to other structures. As an example, the bus bar member 7 may be used to connect the output pole pieces 46 of two battery modules 6 to connect the two battery modules 6 in series or in parallel.

In the embodiment of the application, the output pole piece 46 and the connector 42 are arranged at the two opposite ends of the battery module 6, so that the distance between the bus component 7 and the wire harness can be increased, and the interference between high-voltage and low-voltage lines can be reduced.

In some embodiments, the battery pack 2 includes a plurality of battery modules 6.

In some embodiments, the battery pack 2 further includes a harness 8, the harness 8 including a mating connector 8a and a harness body 8b, the mating connector 8a being in plug-fit with the connector 42, the harness body 8b being connected to the mating connector 8a. As an example, the harness body 8b may be connected to a battery management system.

In some embodiments, the bus bar member 7 does not extend beyond the second end plate 30 in a direction away from the first end plate 20 and parallel to the first direction X.

The embodiment of the application can enable the confluence part 7 to share the space with the battery module 6 in the first direction X, thereby improving the space utilization rate and reducing the requirement of the battery pack 2 on the size of the first direction X.

In some embodiments, a portion of the output pole piece 46 and a portion of the bus member 7 are stacked on the second end plate 30 in the second direction Z and connected to the second end plate 30.

The second end plate 30 can support and fix the output pole piece 46 and the bus member 7, thereby improving the stability of the connection of the output pole piece 46 with the bus member 7 and reducing the risk of failure when the battery pack 2 is subjected to external impact. The output pole piece 46 and the bus member 7 can use the space of one side of the second end plate 30 in the second direction Z, thereby reducing the space additionally occupied by the output pole piece 46 and the bus member 7 in the first direction X.

In some embodiments, the battery pack 2 further includes a protective cover 9 fixed to the second end plate 30, and the protective cover 9 is used to cover the junction between the bus bar member 7 and the output pole piece 46, so as to reduce the risk of short circuit.

In some embodiments, the protective cover 9 is provided with a channel 9a at one side in the third direction Y, and the bus bar 7 may pass through the channel 9a of the protective cover 9.

In some embodiments, the battery pack 2 includes at least two battery modules 6 arranged along the third direction Y, the first direction X, the second direction Z, and the third direction Y being perpendicular to each other. The bus bar 7 is connected to the output pole pieces 46 of two battery modules 6 adjacent in the third direction Y.

The confluence part 7 may connect the two battery modules 6 in series or in parallel to achieve confluence output of the two battery modules 6. The bus bar members 7 do not exceed the second end plates 30 of the two battery modules 6 in a direction away from the first end plates 20 and parallel to the first direction X, thereby reducing the need for the size of the battery pack 2 in the first direction X.

In some embodiments, the battery pack 2 includes a plurality of battery modules 6 and a plurality of bus members 7, the plurality of bus members 7 connecting the plurality of battery modules 6 in series, parallel, or a series-parallel connection. Alternatively, at least one of the bus members 7 is a bar-shaped structure extending in the third direction Y, as viewed in the first direction X.

In some embodiments, the wire harness 8 does not extend beyond the first end plate 20 in a direction away from the second end plate 30 and parallel to the first direction X, such that the wire harness 8 shares space with the battery module 6 in the first direction X, thereby improving space utilization and reducing the size requirements of the battery pack 2 in the first direction X.

According to some embodiments of the present application, the present application also provides an electric device, which includes the battery module 6 of any one of the above embodiments, and the battery module 6 is used to provide electric energy for the electric device.

According to some embodiments of the present application, the present application also provides an electric device, which includes the battery pack 2 of any one of the above embodiments, where the battery pack 2 is used to provide electric energy for the electric device.

Referring to fig. 3 to 12, an embodiment of the present application provides a battery module 6 including a first end plate 20, a second end plate 30, a plurality of battery cells 10, a harness plate assembly 40, a protection plate 60, and a tie 50.

The first end plate 20 and the second end plate 30 are disposed at intervals along the first direction X. The plurality of battery cells 10 are disposed between the first end plate 20 and the second end plate 30. The tie 50 is formed around the first end plate 20, the plurality of battery cells 10, and the second end plate 30 as a unit to fix the first end plate 20, the plurality of battery cells 10, and the second end plate 30 together.

The harness plate assembly 40 is disposed at one side of the plurality of battery cells 10 in a second direction Z, which is perpendicular to the first direction X.

The harness board assembly 40 includes a separator 43, a circuit board 41, a connector 42, a plurality of bus bars 44, and two output pole pieces 46. The circuit board 41, the connector 42, and the plurality of bus bars 44 are mounted to the partition plate 43. The plurality of bus bars 44 are used to connect to the plurality of battery cells 10 to connect the plurality of battery cells 10 in series, parallel, or series-parallel.

The circuit board 41 is provided with a wire, one end of which is electrically connected with the bus bar 44 so as to collect electric signals and/or temperature signals on the bus bar 44; the other end of the wire is connected to the connector 42 to transmit the acquired signal to the connector 42.

The connector 42 is disposed at an end of the circuit board 41 near the first end plate 20 along the first direction X. The connector 42 does not extend beyond the first end plate 20 in a direction away from the second end plate 30 and parallel to the first direction X.

The socket of the connector 42 faces the second end plate 30 in the first direction X. The connector 42 is configured to be mated with the wiring harness 8, and the wiring harness 8 may be inserted into the socket of the connector 42 at a side of the connector 42 near the second end plate 30.

The output pole piece 46 is electrically connected to the plurality of battery cells 10 of the battery module 6, and at least a portion of the output pole piece 46 is located on one side of the second end plate 30 in the second direction Z. The output tab 46 may be used to electrically connect with the bus member 7 connecting the two battery modules 6. The bus bar member 7 does not protrude beyond the second end plate 30 in a direction away from the first end plate 20 and parallel to the first direction X.

The protection plate 60 is disposed at a side of the circuit board 41 facing away from the battery cell 10. One end of the shielding plate 60 in the first direction X is fixed to the first end plate 20, and the other end of the shielding plate 60 in the first direction X is movably connected to the second end plate 30. The connector 42 is disposed on a side of the circuit board 41 facing the shielding plate 60. The protection plate 60 is provided with a relief structure 61, the relief structure 61 being used for relieving the connector 42.

The shielding plate 60 is provided with a guide groove 62, the guide groove 62 penetrates the shielding plate 60 in the second direction Z, and the guide groove 62 extends to the edge of the shielding plate 60 in the first direction X and forms an opening 621.

The battery module 6 further includes a fixing member 70, the fixing member 70 including a stem 71 and a flange 72, the flange 72 surrounding the stem 71. The rod portion 71 passes through the guide groove 62 in the second direction Z and is connected to the second end plate 30, and a portion of the shielding plate 60 is located between the second end plate 30 and the flange 72 in the second direction Z.

While the application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the application, and in particular, the technical features set forth in the various embodiments may be combined in any manner so long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. A battery module, comprising:

the first end plate and the second end plate are arranged at intervals along the first direction;

a plurality of battery cells disposed between the first end plate and the second end plate;

the wire harness board assembly is arranged on one side of each of the plurality of battery cells along the second direction, the second direction is intersected with the first direction, the wire harness board assembly comprises a circuit board and a connector, the circuit board is electrically connected to at least part of the plurality of battery cells, the connector is arranged on one end, close to the first end plate, of the circuit board along the first direction, and the plug-in structure of the connector faces the second end plate along the first direction.

2. The battery module of claim 1, wherein the connector does not extend beyond the first end plate in a direction away from the second end plate and parallel to the first direction.

3. The battery module of claim 1, wherein the connector is connected to the first end plate.

4. The battery module of claim 1, further comprising a protective plate disposed on a side of the circuit board facing away from the battery cells;

the guard plate is connected to the first end plate and the second end plate.

5. The battery module according to claim 4, wherein the connector is provided at a side of the circuit board facing the shielding plate;

the protection plate is provided with an avoidance structure, and the avoidance structure is used for avoiding the connector.

6. The battery module of claim 4, wherein the shielding plate is fixed to one of the first and second end plates, the shielding plate being movably connected to the other of the first and second end plates in the first direction.

7. The battery module of claim 6, wherein the battery module comprises a plurality of battery cells,

The protection plate is provided with a guide groove, and the guide groove penetrates through the protection plate along the second direction;

the battery module further comprises a fixing piece, wherein the fixing piece comprises a rod part and a flange, and the flange surrounds the rod part; the rod part passes through the guide groove along the second direction and is connected with the second end plate, and a part of the protection plate is positioned between the second end plate and the flange along the second direction;

in the first direction, the guide groove has a size larger than that of the lever portion.

8. The battery module of claim 7, wherein the guide groove extends to an edge of the protection plate in the first direction and forms an opening.

9. A battery pack, comprising:

the battery module of any one of claims 1-8, the harness plate assembly further comprising an output pole piece electrically connected to the plurality of battery cells of the battery module, at least a portion of the output pole piece being located on one side of the second end plate in the second direction; and

and the converging component is electrically connected with the output pole piece.

10. The battery pack of claim 9, wherein the bus bar member does not extend beyond the second end plate in a direction away from the first end plate and parallel to the first direction.

11. The battery pack according to claim 10, wherein a portion of the output pole piece and a portion of the bus member are laminated on and connected to the second end plate in the second direction.

12. The battery pack of claim 9, wherein the battery pack comprises a plurality of battery cells,

the battery pack comprises at least two battery modules arranged along a third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other;

the bus member is connected to the output pole pieces of two battery modules adjacent in the third direction.

13. An electrical device comprising a battery module according to any one of claims 1-8 or a battery pack according to any one of claims 9-12 for providing electrical energy.