CN114614202A - Battery pack and electric equipment - Google Patents

Abstract

The application provides a battery package and consumer relates to battery technical field. The battery cell module of the battery pack comprises a first electrode terminal and a second electrode terminal which have opposite polarities; the battery pack comprises a first fuse, a first conductive piece and a second conductive piece, wherein the first fuse is electrically connected between the first electrode terminal and the first conductive piece, the second conductive piece is electrically connected with the second electrode terminal, and a gap is formed between the first conductive piece and the second conductive piece; the first conductive member and the second conductive member are configured to be able to contact each other to conduct a circuit in which the first electrode terminal, the first fuse, the first conductive member, the second conductive member, and the second electrode terminal are located, thereby disconnecting the first fuse. When the battery package charge-discharge is unusual, the contact of first electrically conductive piece and second electrically conductive piece, the short circuit of electricity core module makes first fuse fusing, cuts off the charge-discharge path, reduces because of the unusual risk that causes safety problems such as conflagration, explosion of battery package charge-discharge to improve the security performance of battery package.

Description

Battery pack and electric equipment

Technical Field

The application relates to the technical field of batteries, in particular to a battery pack and electric equipment.

Background

Secondary batteries, such as lithium ion batteries, sodium ion batteries, solid state batteries, and the like, have outstanding advantages of high energy density, good cycle performance, and the like, and are widely used in the fields of portable electronic devices, electric vehicles, electric tools, unmanned aerial vehicles, energy storage devices, and the like. The safety problem of the battery is one of the main concerns of the user and is also one of the main factors restricting the development of the battery. Therefore, how to improve the safety performance of the battery becomes a problem to be solved urgently in the field of batteries.

Disclosure of Invention

The embodiment of the application provides a battery pack and electric equipment to improve the problem of poor safety performance of a battery.

In a first aspect, an embodiment of the present application provides a battery pack, which includes a battery cell module, where the battery cell module includes a plurality of battery cells, a first electrode terminal, and a second electrode terminal, and polarities of the first electrode terminal and the second electrode terminal are opposite; the battery pack further comprises a first fuse, a first conductive piece and a second conductive piece, wherein the first fuse is electrically connected between the first electrode terminal and the first conductive piece, the second conductive piece is electrically connected with the second electrode terminal, and a gap exists between the first conductive piece and the second conductive piece; wherein the first conductive member and the second conductive member are configured to be capable of contacting each other to conduct a circuit in which the first electrode terminal, the first fuse, the first conductive member, the second conductive member, and the second electrode terminal are located, thereby disconnecting the first fuse.

Among the above-mentioned technical scheme, first fuse electricity is connected in first electrode terminal and first electrically conductive piece, and second electrically conductive piece is connected with second electrode terminal electricity, and when the battery package charge-discharge was unusual, first electrically conductive piece and the contact of second electrically conductive piece, then first electrode terminal, first fuse, first electrically conductive piece, second electrically conductive piece and second electrode terminal form the current path, make electric core module short circuit. After the short circuit, the current in the current path that first electrode terminal, first fuse, first electrically conductive piece, second electrically conductive piece and second electrode terminal formed can increase rapidly, and after surpassing the fusing threshold value of first fuse, first fuse fuses, cuts off the charge-discharge path, reduces because of the risk that the battery package charges and discharges the safety problems such as conflagration, explosion that arouse unusually to improve the security performance of battery package. Make electric core module short circuit through the physical contact of first electrically conductive piece and second electrically conductive piece, and then make first fuse fusing to effectively, alleviateed the Battery package charge and discharge unusually and leaded to the safety problem reliably, can effectively reduce and lead to judging the unusual inefficacy risk of losing charge and discharge of Battery package because of BMS (Battery Management System) became invalid, improved the reliability that prevents the Battery package charge and discharge unusually.

In some embodiments of the first aspect, the battery pack further comprises: a first charging terminal and a second charging terminal, the first conductive member being electrically connected between the first charging terminal and the first electrode terminal; the second conductive member is electrically connected between the second charging terminal and the second electrode terminal.

Among the above-mentioned technical scheme, the setting of first charging terminal and second charging terminal is convenient for external power source and is charged for the battery package. The first conductive piece is electrically connected between the first charging terminal and the first electrode terminal, the second conductive piece is connected between the second charging terminal and the second electrode terminal, when charging is carried out, the first electrode terminal, the first fuse, the first conductive piece, the first charging terminal, the second conductive piece and the second electrode terminal form a charging circuit, when charging is abnormal, the first conductive piece is contacted with the second conductive piece, and then the first electrode terminal, the first fuse, the first conductive piece, the second conductive piece and the second electrode terminal form a current circuit, so that the cell module is short-circuited. After the short circuit, the electric current in the electric current route that first electrode terminal, first fuse, first electrically conductive piece, second electrically conductive piece and second electrode terminal formed can increase rapidly, and after surpassing the fusing threshold value of first fuse, first fuse fuses, cuts off the charging route, reduces because of the risk that the battery package charges the safety problems such as conflagration, explosion that arouse unusually to improve the security performance of battery package in charging process. Make electric core module short circuit through the contact of first electrically conductive piece and second electrically conductive piece, and then make first fuse fusing to avoid battery package charge-discharge to lead to the safety problem unusually. The risk of judging abnormal failure of charging and discharging of the battery pack caused by BMS failure can be effectively reduced, and the reliability of preventing abnormal charging and discharging of the battery pack is improved.

In some embodiments of the first aspect of the present application, the battery pack comprises: a second fuse electrically connected between the second charging terminal and the second conductive member or between the first charging terminal and the first conductive member; wherein the first conductive member and the second conductive member are configured to be capable of contacting each other to conduct a circuit in which the first charging terminal, the first conductive member, the second fuse, and the second charging terminal are located, thereby disconnecting the second fuse.

Among the above-mentioned technical scheme, in the charging process, first electrically conductive piece and the electrically conductive back of second contact, not only electric core module short circuit, still can make first charging terminal, first electrically conductive piece, the electrically conductive piece of second and the second charging terminal form the current path, make external power supply short circuit, thereby lead to external power source to damage, cause safety problem even, the setting of second fuse, can be after external power source short circuit, in time fuse in order to cut off first charging terminal, first electrically conductive piece, the current path between the electrically conductive piece of second and the second charging terminal, avoid damaging external power source and causing the conflagration because of the short circuit, safety problems such as explosion, thereby improve the security performance of charging process.

In some embodiments of the first aspect, the battery pack further comprises: a first discharge terminal and a second discharge terminal, the first conductive member being electrically connected between the first discharge terminal and the first electrode terminal; the second conductive member is electrically connected between the second discharge terminal and the second electrode terminal.

In the above technical solution, the arrangement of the first discharge terminal and the second discharge terminal facilitates the discharge of the battery pack to an external load. The first conductive piece is electrically connected between the first discharging terminal and the first electrode terminal, the second conductive piece is connected between the second discharging terminal and the second electrode terminal, and when discharging, the first electrode terminal, the first conductive piece, the first discharging terminal, the second conductive piece and the second electrode terminal form a charging and discharging circuit. When discharging unusually, contact at first electrically conductive piece and the electrically conductive piece of second for electric core module short circuit, and then make first fuse fusing, cut off the route that discharges, avoid causing safety problems such as conflagration, explosion because of discharging unusually, thereby improve the security performance of battery package at the discharge in-process.

In some embodiments of the first aspect, the battery pack further comprises: a third fuse electrically connected between the second discharging terminal and the second conductive member or between the first discharging terminal and the first conductive member; wherein the first conductive member and the second conductive member are configured to be capable of contacting each other to conduct a circuit in which the first discharging terminal, the first conductive member, the second conductive member, the third fuse, and the second discharging terminal are located, thereby disconnecting the third fuse.

Among the above-mentioned technical scheme, the setting of third fuse can reduce because of the risk that discharges the safety problems such as the unusual damage external load and initiation conflagration, explosion through cutting off the discharge circuit through fusing third fusing device to improve the security performance of discharge process.

In some embodiments of the first aspect of the present application, the first electrically conductive member is spaced apart from the second electrically conductive member along the first direction; the first conductive piece is configured to be capable of moving relative to the second conductive piece in an opposite direction in response to expansion of the cell module, so that a gap between the first conductive piece and the second conductive piece is reduced until the first conductive piece and the second conductive piece are in contact.

Among the above-mentioned technical scheme, at electric core module charge-discharge in-process, the inside temperature of electric core module can rise, and the volume can expand, and electric core module lasts the inflation, appears incident such as fire, explosion easily. The electric core module inflation is the phenomenon that can appear in certain conditions certainly, and the inflation of electric core module is responded to in the motion that first electrically conductive piece and second electrically conductive piece are close to relatively to make electric core module short circuit, and then the first fusing portion of fusing, with cut off the charge-discharge path, in order to prevent that electric core module further inflation and cause the safety problem, consequently can further improve the reliability that prevents to charge-discharge abnormity. Make electric core module short circuit through the contact of first electrically conductive piece and second electrically conductive piece, and then make first fuse fusing, can not need BMS hardware to detect the battery package internal characteristics (for example voltage, temperature, gas concentration, the electric core module expansion characteristic that the overcharge leads to etc.) signal, judge whether the battery package charge-discharge is unusual, effectively reduce and lead to judging the unusual risk of battery package charge-discharge because of the BMS inefficacy.

In some embodiments of the first aspect, the battery pack further comprises: the elastic piece and the battery cell module are arranged in parallel along the first direction, the plurality of battery cells are stacked, and the first direction is the stacking direction of the plurality of battery cells; at least one of the first conductive member and the second conductive member is disposed on the elastic member.

In the above technical scheme, at least one of the first conductive piece and the second conductive piece is arranged on the elastic piece, so that when the battery pack is in a normal charging and discharging state and in a working environment, the risk of short circuit caused by contact between the first conductive piece and the second conductive piece or contact between the first conductive piece and the second conductive piece and other components inside the battery pack is reduced.

In some embodiments of the first aspect of the present application, the elastic member is configured to be compressed in response to expansion of the cell module, so as to move the first conductive member toward the second conductive member.

Among the above-mentioned technical scheme, need extrusion elastic component just can make first electrically conductive piece and the electrically conductive piece of second move in opposite directions and contact, then when the battery package is in normal charge-discharge state, the elastic component can keep first electrically conductive piece and the electrically conductive piece of second in the non-contact state to make the battery package can normally charge-discharge.

In some embodiments of the first aspect of the present application, the elastic member further includes a through hole, at least one of the first conductive member and the second conductive member being located at the through hole.

In the technical scheme, at least one of the first conductive piece and the second conductive piece is positioned in the through hole of the elastic piece, so that the first conductive piece and the second conductive piece can be kept in a non-contact state under the condition that the elastic piece is not extruded, the battery pack can be charged and discharged normally, and the internal space of the battery pack occupied by the first conductive piece, the second conductive piece and the elastic piece can be reduced.

In some embodiments of the first aspect of the present application, the elastic member includes a first sub elastic member and a second sub elastic member, the through hole includes a first hole section disposed in the first sub elastic member and a second hole section disposed in the second sub elastic member, the first conductive member is embedded in the first hole section, and the second conductive member is embedded in the second hole section.

In the technical scheme, the first conductive piece and the second conductive piece are respectively embedded in the first hole section of the first sub-elastic piece and the second hole section of the second sub-elastic piece, so that the first conductive piece and the second conductive piece can be kept in a non-contact state under the condition that the first sub-elastic piece and the second sub-elastic piece are not extruded, and the first conductive piece and the second conductive piece can be conveniently and independently installed and position-adjusted.

In some embodiments of the first aspect of the present application, the battery pack further comprises: the first member and the second member are oppositely arranged along the first direction, and the elastic piece is arranged between the first member and the second member; the first conductive piece is fixed on the first component, and the second conductive piece is fixed on the second component.

Among the above-mentioned technical scheme, the elastic component is located between first component and the second component, and under the less condition of electric core module unexpanded or inflation volume, the elastic component can make first electrically conductive piece and second electrically conductive piece keep at the state of non-contact to make the battery package can normally charge and discharge. Under the great condition of electric core module inflation volume, electric core module can drive first component and second component and move in opposite directions to through first component and second component cooperation extrusion elastic component, in order to give the extrusion force stable with the elastic component, so that first electrically conductive piece can in time stabilize the contact with the second electrically conductive piece, in order to make first fuse in time fuse, avoid taking place the incident.

In some embodiments of the first aspect of the present application, the first member and the second member are insulators.

According to the technical scheme, the first member and the second member are the insulating parts, so that the short circuit of the battery pack caused by the contact of the first member and the second member with parts inside the battery pack can be avoided.

In some embodiments of the first aspect of the present application, the battery pack further includes a casing, and the cell module, the elastic member, the first conductive member, and the second conductive member are accommodated in the casing; the casing comprises a first wall and a second wall, the first wall and the second wall are arranged oppositely along the first direction, and the elastic piece is located between the battery cell module and the first wall.

Among the above-mentioned technical scheme, the elastic component is located between the first wall of electric core module and casing, and the electric core module of being convenient for and first wall cooperation extrusion elastic component to make first electrically conductive piece and the second electrically conductive timely, stable contact, thereby the timely fusing of first fusing portion of fusing.

In a second aspect, an embodiment of the present application provides an electric device, including the battery pack provided in any embodiment of the first aspect.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, and it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope.

Fig. 1 is an exploded view of a battery pack provided in some embodiments of the present application;

fig. 2 is a schematic structural diagram of a cell module according to some embodiments of the present disclosure (a plurality of cells are connected in series);

fig. 3 is a schematic structural diagram of a cell module according to some embodiments of the present disclosure (a plurality of cells are connected in parallel);

fig. 4 is a circuit diagram of a battery pack provided in some embodiments of the present application;

fig. 5 is a circuit diagram of a battery pack according to further embodiments of the present application;

fig. 6 is a circuit diagram of a battery pack according to still other embodiments of the present application;

fig. 7 is a circuit diagram of a battery pack according to further embodiments of the present application;

fig. 8 is a circuit diagram of a battery pack according to still other embodiments of the present application;

fig. 9 is a circuit diagram of a battery pack according to yet other embodiments of the present application;

fig. 10 is a block diagram of a battery pack according to some embodiments of the present application;

fig. 11 is a cross-sectional view of a battery pack provided in some embodiments of the present application (the first conductive member and the second conductive member are not in contact);

fig. 12 is a schematic diagram of an elastic member disposed between a first conductive member and a second conductive member according to some embodiments of the present disclosure;

fig. 13 is a cross-sectional view of a battery pack provided in some embodiments of the present application (a first conductive member and a second conductive member are in contact);

fig. 14 is a schematic structural view of a battery pack according to some embodiments of the present application;

fig. 15 is a schematic diagram of a circuit board and a battery cell module provided in some embodiments of the present application after connection.

Icon: 100-a battery pack; 10-a cell module; 11-electric core; 12-a first electrode terminal; 13-a second electrode terminal; 20-a first fuse; 30-a first conductive member; 31-a first connection; 40-a second conductive member; 41-a second connection; 50-a first charging terminal; 60-a second charging terminal; 70-a second fuse; 80-a first discharge terminal; 90-a second discharge terminal; 110-a third fuse; 120-an elastic member; 1201-a via; 1202-a first sub-spring; 12021-first hole segment; 1203-a second sub-elastic; 12031-a second bore section; 130-a first member; 140-a second member; 150-a housing; 1501-a first wall; 1502-a second wall; 1503-first portion; 15031-a first plate portion; 15032-a second plate portion; 1504 — a second portion; 15041-a third plate portion; 15042-fourth plate portion; 1505-a limiting structure; 15051-a first card slot; 15052-a second card slot; 160-a circuit board; x-a first direction; y-second direction.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described in detail and clearly with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, an item is defined in one figure and need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present application, it should be noted that the indication of orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of the application is used, or the orientation or positional relationship which is conventionally understood by those skilled in the art, is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.

At present, the application of the power battery is more and more extensive from the development of market situation. The power battery is widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles and the like, and a plurality of fields such as electric tools, unmanned planes, energy storage equipment and the like. With the continuous expansion of the application field of the power battery, the market demand is also continuously expanded.

The inventor notices that in the process of charging the battery by an external power supply, the risk of overcharging exists, the overcharging of the battery is easy to cause thermal runaway, and even serious safety problems such as smoking, fire, explosion and the like occur; in the process of discharging to the electric equipment through the battery, there may be a situation that the current environment is not suitable for discharging, for example, the environment temperature is high, and the battery is ignited and exploded due to the continuous discharging to the electric equipment through the battery. In order to detect whether a Battery is abnormally charged or discharged, currently, hardware or program software of a BMS (Battery Management System) is mainly used to detect voltage, temperature, gas concentration, and the like inside a Battery pack, when the voltage, temperature, gas concentration, and the like inside the Battery pack exceed preset values, the Battery pack is determined to be abnormally charged or discharged, and the BMS controls a charging and discharging circuit to be disconnected after the abnormality is detected, so as to prevent the abnormal charging and discharging.

However, the BMS is relied upon for detection and control to prevent abnormal charging and discharging of the battery, and if the detection hardware, the control software, or the control hardware of the BMS fails, abnormal charging and discharging failure is prevented. Particularly, when a user uses a non-standard charger, the control hardware is easy to break down, so that a charging and discharging loop cannot be disconnected, the safety risk of the charging and discharging process of the battery is greatly improved, and the reliability of preventing the charging and discharging abnormality of the battery pack is low.

Based on the above consideration, in order to solve the problem that the safety risk of the existing battery in the charging and discharging process is high, the inventor has conducted intensive research, and designed a battery pack, in which a first fuse is electrically connected to a first electrode terminal and a first conductive piece, and a second conductive piece is electrically connected to a second electrode terminal, when the charging and discharging of the battery pack are abnormal, the first conductive piece contacts with the second conductive piece, and then the first electrode terminal, the first fuse, the first conductive piece, the second conductive piece and the second electrode terminal form a current path, so that a battery cell module is short-circuited. After the short circuit, the current in the current path that first electrode terminal, first fuse, first electrically conductive piece, second electrically conductive piece and second electrode terminal formed can increase rapidly, and after surpassing the fusing threshold value of first fuse, first fuse fuses, cuts off the charge-discharge path, reduces because of the risk that the battery package charges and discharges the safety problems such as conflagration, explosion that arouse unusually to improve the security performance of battery package.

Make electric core module short circuit through the electrically conductive physical contact of first electrically conductive piece and second, and then make first fuse fusing to alleviateed the battery package charge-discharge abnormity effectively and leaded to the safety problem, effectively reduced and leaded to judging the unusual risk that became invalid of battery package charge-discharge because of the BMS became invalid, improved and prevented the unusual reliability of battery package charge-discharge.

The battery pack disclosed by the embodiment of the application can be but is not limited to be used in electric equipment such as electric two-wheeled vehicles, electric tools, unmanned aerial vehicles and energy storage equipment. The battery pack with the working condition of the application can be used as a power supply system of the electric equipment, so that the charging and discharging safety of the power supply system and the electricity utilization safety of the electric equipment are improved.

The embodiment of the application provides an use consumer of battery package as power, consumer can be but not limited to electronic equipment, electric tool, electric vehicle, unmanned aerial vehicle, energy storage equipment. The electronic equipment can comprise a mobile phone, a tablet, a notebook computer and the like, the electric tool can comprise an electric drill, an electric saw and the like, and the electric vehicle can comprise an electric automobile, an electric motorcycle, an electric bicycle and the like.

As shown in fig. 1, an embodiment of the present application provides a battery pack 100, where the battery pack 100 includes a cell module 10, the cell module 10 includes a plurality of cells 11, a first electrode terminal 12, and a second electrode terminal 13, and polarities of the first electrode terminal 12 and the second electrode terminal 13 are opposite; the battery pack 100 further includes a first fuse 20, a first conductive member 30 (not shown in fig. 1), and a second conductive member 40, the first fuse 20 being electrically connected between the first electrode terminal 12 and the first conductive member 30, the second conductive member 40 being electrically connected to the second electrode terminal 13, and a gap being present between the first conductive member 30 and the second conductive member 40; wherein the first conductive member 30 and the second conductive member 40 are configured to be able to contact each other to conduct a circuit in which the first electrode terminal 12, the first fuse 20, the first conductive member 30, the second conductive member 40, and the second electrode terminal 13 are located, thereby disconnecting the first fuse 20.

In the battery pack 100, the plurality of battery cells 11 may be connected in series, in parallel, or in a series-parallel connection, where the series-parallel connection refers to both series connection and parallel connection among the plurality of battery cells 11. A plurality of battery cells 11 can be directly connected in series or in parallel or in series-parallel to form a battery cell module 10; of course, a plurality of battery cells 11 may be connected in series or in parallel or in series-parallel to form the battery cell module 10.

Each of the battery cells 11 may be a secondary battery including, but not limited to, a lithium sulfur battery, a sodium ion battery, a magnesium ion battery, a solid state battery, and the like. The battery cell 11 may be a cylinder, a flat body, a rectangular parallelepiped, or other shapes. The casing of the battery cell 11 may be in a hard shell form or a soft package form.

The first electrode terminal 12 and the second electrode terminal 13 have opposite polarities, which means that the first electrode terminal 12 and the second electrode terminal 13 are a positive electrode terminal and a negative electrode terminal, respectively. The electric energy of the battery cell module 10 can be output through the first electrode terminal 12 and the second electrode terminal 13 or the electric energy of the external power supply can be stored in the battery cell module 10 through the first electrode terminal 12 and the second electrode terminal 13.

As shown in fig. 2, in an embodiment in which a plurality of battery cells 11 are connected in series to form a battery cell module 10, along the parallel direction of the battery cells 11, a positive electrode of one battery cell 11 at one end serves as a first electrode terminal 12 of the battery cell module 10, and a negative electrode of one battery cell 11 at the other end serves as a second electrode terminal 13 of the battery cell module 10. As shown in fig. 3, in an embodiment in which a plurality of battery cells 11 are connected in parallel to form a battery cell module 10, a positive electrode of any one of the battery cells 11 may serve as the first electrode terminal 12 of the battery cell module 10, and a negative electrode of any one of the battery cells 11 may serve as the second electrode terminal 13 of the battery cell module 10.

The first fuse 20 is a member which is blown by heat generated by itself when a current exceeds a threshold value for a certain period of time, thereby breaking a circuit, and serves as a protection device for short circuit and overcurrent.

As shown in fig. 1 and 4, in the present embodiment, the first fuse 20 is electrically connected to the first electrode terminal 12 and the first conductive member 30, in other words, the first electrode terminal 12 and the first conductive member 30 are electrically connected through the first fuse 20; the second conductive member 40 is electrically connected to the second electrode terminal 13. When the first conductive member 30 and the second conductive member 40 contact each other due to abnormal charging and discharging of the battery pack 100, the first electrode terminal 12, the first fuse 20, the first conductive member 30, the second conductive member 40, and the second electrode terminal 13 form a current path, so that the cell module 10 is short-circuited. After short circuit, the current in the current path formed by the first electrode terminal 12, the first fuse 20, the first conductive member 30, the second conductive member 40 and the second electrode terminal 13 is rapidly increased, and after the current exceeds the fusing threshold of the first fuse 20 for a period of time, the first fuse 20 fuses to cut off the charging and discharging path, so that the risk of fire, explosion and other safety problems caused by abnormal charging and discharging of the battery pack 100 is reduced, and the safety performance of the battery pack 100 is improved.

Make electric core module 10 short circuit through the physical contact of first electrically conductive 30 and the electrically conductive 40 physical contact of second, and then make first fuse 20 fusing, can effectively reduce and lead to judging the risk of whether unusual inefficacy of battery package 100 charge-discharge because of BMS's hardware and software are invalid, improved and prevented the unusual reliability of battery package charge-discharge.

After the battery pack 100 is short of power, the battery pack 100 needs to be charged by an external power source. Thus, as shown in fig. 4, in some embodiments, the battery pack 100 further includes: a first charging terminal 50 and a second charging terminal 60, the first conductive member 30 being electrically connected between the first charging terminal 50 and the first electrode terminal 12; the second conductive member 40 is electrically connected between the second charging terminal 60 and the second electrode terminal 13. B + and B-in FIG. 4 correspond to the first electrode terminal 12 and the second electrode terminal 13, respectively; c + and C-correspond to the first and second charging terminals 50 and 60, respectively.

The first conductive member 30 is electrically connected between the first charging terminal 50 and the first electrode terminal 12, and it can be understood that the first charging terminal 50 and the first electrode terminal 12 are electrically connected through the first conductive member 30. In the present embodiment, the first conductive member 30 is electrically connected between the first charging terminal 50 and the first fuse 20, and the first fuse 20 is electrically connected between the first conductive member 30 and the first electrode terminal 12.

The second conductive member 40 is electrically connected between the second charging terminal 60 and the second electrode terminal 13, and it can be understood that the second charging terminal 60 and the second electrode terminal 13 are electrically connected through the second conductive member 40.

The first and second charging terminals 50 and 60 are provided to facilitate the external power source to charge the battery pack 100. The first conductive member 30 is electrically connected between the first charging terminal 50 and the first electrode terminal 12, and the second conductive member 40 is electrically connected between the second charging terminal 60 and the second electrode terminal 13, during charging, the first charging terminal 50, the first conductive member 30, the first fuse 20, the first electrode terminal 12, the second electrode terminal 13, the second conductive member 40, and the second charging terminal 60 form a charging path, and when the first conductive member 30 and the second conductive member 40 contact due to abnormal charging, the first electrode terminal 12, the first fuse 20, the first conductive member 30, the second conductive member 40, and the second electrode terminal 13 form a current path, so that the battery cell module 10 is short-circuited. After short circuit, the current in the current path formed by the first electrode terminal 12, the first fuse 20, the first conductive member 30, the second conductive member 40 and the second electrode terminal 13 is rapidly increased, and when the current exceeds the fusing threshold of the first fuse 20, the first fuse 20 fuses to cut off the charging path, thereby reducing the risk of fire, explosion and other safety problems caused by abnormal charging of the battery pack 100, and improving the safety performance of the battery pack 100 in the charging process.

Make electric core module 10 short circuit through the contact of first electrically conductive 30 and the second electrically conductive 40, and then make first fuse 20 fuse, can effectively reduce because of the BMS inefficacy leads to preventing the risk that battery package 100 overcharged and became invalid.

In the charging process, after the first conductive member 30 and the second conductive member 40 contact each other, not only the cell module 10 is short-circuited, but also the first charging terminal 50, the first conductive member 30, the second conductive member 40, and the second charging terminal 60 form a current path, so that an external power supply is short-circuited, thereby causing damage to the external power supply and even causing a safety problem.

Based on this, as shown in fig. 5 and 6, in some embodiments, the battery pack 100 includes: a second fuse 70, the second fuse 70 being electrically connected between the second charging terminal 60 and the second conductive member 40, or between the first charging terminal 50 and the first conductive member 30; wherein the first and second conductive members 30 and 40 are configured to be able to contact each other to conduct a circuit in which the first charging terminal 50, the first conductive member 30, the second conductive member 40, the second fuse 70, and the second charging terminal 60 are located, thereby disconnecting the second fuse 70.

The second fuse 70 is a part which is blown by heat generated by itself after a current exceeds a threshold value for a certain period of time, thereby breaking the circuit, and serves as a protection device for short circuit and overcurrent of the circuit. The second fuse 70 may be the same as or different from the first fuse 20 in structure and material.

The second fuse 70 is connected between the second charging terminal 60 and the second conductive member 40, and it is understood that the second charging terminal 60 and the second conductive member 40 are electrically connected through the second fuse 70.

In other embodiments, as shown in fig. 6, the second fuse 70 may also be electrically connected between the first charging terminal 50 and the first conductive member 30.

The second fuse 70 is arranged to be fused in time to cut off the current path among the first charging terminal 50, the first conductive member 30, the second conductive member 40, the second fuse 70 and the second charging terminal 60 after the external power supply is short-circuited (i.e., the first charging terminal 50, the first conductive member 30, the second conductive member 40, the second fuse 70 and the second charging terminal 60 form a current path), so that the wind direction which damages the external power supply due to short-circuit and causes safety problems such as fire and explosion is reduced, and the safety performance of the charging process is improved.

In some embodiments, as shown in fig. 7, the battery pack 100 further includes: a first discharging terminal 80, a first conductive member 30 electrically connected between the first discharging terminal 80 and the first electrode terminal 12; the second conductive member 40 is electrically connected between the second discharging terminal 90 and the second electrode terminal 13. P + and P-in fig. 7 correspond to the first discharging terminal 80 and the second discharging terminal 90, respectively, and P + and P-may also be referred to as a positive output terminal and a negative output terminal of the cell module, respectively.

The first conductive member 30 is electrically connected between the first discharging terminal 80 and the first electrode terminal 12, and it can be understood that the first discharging terminal 80 and the first electrode terminal 12 are electrically connected through the first conductive member 30. The second conductive member 40 is electrically connected between the second discharging terminal 90 and the second electrode terminal 13, and it can be understood that the second discharging terminal 90 and the second electrode terminal 13 are electrically connected through the second conductive member 40. The provision of the first and second discharging terminals 80 and 90 facilitates discharging the battery pack 100 to an external load. The first conductive member 30 is electrically connected between the first discharge terminal 80 and the first electrode terminal 12, and the second conductive member 40 is connected between the second discharge terminal 90 and the second electrode terminal 13, and when discharging, the first electrode terminal 12, the first conductive member 30, the first discharge terminal 80, the second discharge terminal 90, the second conductive member 40, and the second electrode terminal 13 form a charge-discharge path. When discharging unusually, contact at first electrically conductive 30 and second electrically conductive 40 for electric core module 10 short circuit, and then make first fuse 20 fusing, cut off the route of discharging, reduce because of the risk that the unusual safety problems such as fire, explosion that arouse of discharging, thereby improve the security performance of battery package 100 in the discharge process.

As shown in fig. 8 and 9, in some embodiments, the battery pack 100 further includes: a third fuse 110, the third fuse 110 being electrically connected between the second discharging terminal 90 and the second conductive member 40, or between the first discharging terminal 80 and the first conductive member 30; the first conductive member 30 and the second conductive member 40 are configured to contact each other, so that a circuit in which the first discharging terminal 80, the first conductive member 30, the second conductive member 40, the third fuse 110, and the second discharging terminal 90 are located is conducted, and the third fuse 110 is disconnected.

The third fuse 110 is connected between the second discharging terminal 90 and the second conductive member 40, and it can be understood that the second discharging terminal 90 and the second conductive member 40 are electrically connected through the third fuse 110.

In other embodiments, as shown in fig. 9, a third fuse 110 may also be connected between the first discharging terminal 80 and the first conductive member 30.

The third fuse 110 is arranged to cut off the discharge loop in time by fusing the third fuse 110, so that the risk of damaging loads and causing safety problems such as fire and explosion due to abnormal discharge is reduced, and the safety performance of the discharge process is improved.

At electric core module 10 charge-discharge in-process, the inside temperature of electric core module 10 can rise, and the volume can expand, and electric core module 10 lasts the inflation, the incident such as easy emergence fire, explosion. Especially under the condition of overcharging, the risk that the battery cell module 10 expands to cause fire and explosion will greatly increase.

Based on this, as shown in fig. 10, in some embodiments, the first conductive member 30 and the second conductive member 40 are spaced apart along the first direction X; the first conductive member 30 is configured such that, in response to swelling of the cell module 10, the first conductive member 30 moves toward the second conductive member 40, so that a gap between the first conductive member 30 and the second conductive member 40 decreases until the first conductive member 30 contacts the second conductive member 40.

In response to the expansion of the cell module 10, the cell module 10 drives the first conductive member 30 and the second conductive member 40 to move toward each other during the expansion process, so that the interval between the first conductive member 30 and the second conductive member 40 gradually decreases until the first conductive member 30 and the second conductive member 40 contact each other, thereby short-circuiting the cell module 10 (as shown in fig. 13).

The expansion of electric core module 10 is the phenomenon that can appear in certain conditions certainly, and the motion response electric core module 10's that first electrically conductive piece 30 and second electrically conductive piece 40 are close to relatively inflation to make electric core module 10 short circuit, and then the first fusing portion of fusing, with the cut-off charge and discharge path, in order to prevent that electric core module 10 further expands and cause the safety problem, consequently can further improve the reliability that prevents to charge and discharge unusually. Through the first piece 30 of electric conduction of electric core module 10 inflation drive and the second physical contact of 40 to make electric core module 10 short circuit, and then make first fuse 20 fusing, can effectively reduce and lead to judging the unusual risk of battery package 100 charge-discharge because of BMS inefficacy.

Referring to fig. 10, in some embodiments, the battery pack 100 further includes: the elastic member 120 is arranged in parallel with the cell module 10 along a first direction X, the plurality of cells 11 are stacked, and the first direction X is a stacking direction of the plurality of cells 11; at least one of the first and second conductive members 30 and 40 is disposed at the elastic member 120.

The stacking of the plurality of battery cells 11 means that the plurality of battery cells 11 are sequentially arranged along a certain direction, and in other embodiments, the plurality of battery cells 11 may also be arranged in other manners, for example, in a rectangular array, in an annular arrangement, and the like. Fig. 10 shows a case where a plurality of battery cells 11 are stacked in a certain linear direction (first direction X).

The elastic member 120 is disposed in parallel with the cell module 10, which means that the elastic member 120 is disposed on one side of the cell module 10 along the first direction X. At least one of the first conductive member 30 and the second conductive member 40 is disposed on the elastic member 120, so that when the battery cell module 10 expands, one of the elastic members 120 can be driven to move towards the other.

In the present embodiment, the first conductive member 30 and the second conductive member 40 are both disposed on the elastic member 120. It is understood that the first conductive member 30 and the second conductive member 40 are disposed on the elastic member 120, the first conductive member 30 and the second conductive member 40 may be directly mounted on the elastic member 120, or the first conductive member 30 and the second conductive member 40 are not directly mounted on the elastic member 120, but during the expansion of the cell module 10, the elastic member 120 is pressed, so that the first conductive member 30 and the second conductive member 40 move towards each other until they contact each other.

The elastic member 120 is an insulating member having an insulating property. The elastic member 120 may be foam, rubber, or the like.

At least one of the first conductive member 30 and the second conductive member 40 is disposed on the elastic member 120, so that when the battery pack 100 is in a normal charging and discharging state and in a working environment, the risk of short circuit caused by contact between the first conductive member 30 and the second conductive member 40 or contact between the first conductive member 30 and the second conductive member 40 and other components inside the battery pack 100 is reduced.

In some embodiments, the elastic member 120 is configured to be compressed in response to expansion of the cell module 10, so as to move the first conductive member 30 toward the second conductive member 40.

The first conductive member 30 and the second conductive member 40 are disposed on the elastic member 120, and the elastic member 120 is pressed by the cell module 10 during the expansion process, so that the first guide member and the second guide member can move towards each other and contact each other. On the contrary, when the battery pack 100 is in a normal charging and discharging state, or the expansion amount of the battery cell module 10 is small and is not enough to extrude the elastic member 120, the elastic member 120 can keep the first conductive member 30 and the second conductive member 40 in a non-contact state, so that the battery pack 100 can be charged and discharged normally.

With reference to fig. 10, in some embodiments, the elastic member 120 further includes a through hole 1201, and at least one of the first conductive member 30 and the second conductive member 40 is located in the through hole 1201.

Before the cell module 10 expands, the elastic member 120 is not squeezed, and the first conductive member 30 may be located in the through hole 1201 or the second conductive member 40 may be located in the through hole 1201, where one of the through holes 1201 may be partially located in the through hole 1201, or may be entirely located in the through hole 1201. The first conductive device 30 and the second conductive device 40 may be both located in the through hole 1201, both the first conductive device 30 and the second conductive device 40 may be partially located in the through hole 1201, or both the first conductive device 30 and the second conductive device 40 may be fully located in the through hole 1201, or one of the first conductive device 30 and the second conductive device 40 may be partially located in the through hole 1201, and the other one may be fully located in the through hole 1201.

After the elastic member 120 is pressed and the first conductive member 30 and the second conductive member 40 are in contact, the first conductive member 30 may be located in the through hole 1201 or the second conductive member 40 may be located in the through hole 1201; or both the first conductive member 30 and the second conductive member 40 may be located in the through hole 1201.

At least one of the first conductive member 30 and the second conductive member 40 is located in the through hole 1201 of the elastic member 120, so that the first conductive member 30 and the second conductive member 40 can be maintained in a non-contact state without being pressed by the elastic member 120, the battery pack 100 can be normally charged and discharged, and the space occupied by the first conductive member 30, the second conductive member 40 and the elastic member 120 in the battery pack 100 can be reduced.

Referring to fig. 10, in some embodiments, the elastic member 120 includes a first sub-elastic member 1202 and a second sub-elastic member 1203, the through hole 1201 includes a first hole 12021 disposed on the first sub-elastic member 1202 and a second hole 12031 disposed on the second sub-elastic member 1203, the first conductive member 30 is embedded in the first hole 12021, and the second conductive member 40 is embedded in the second hole 12031.

The first sub elastic member 1202 and the second sub elastic member 1203 are provided separately. The first sub elastic member 1202 and the second sub elastic member 1203 are arranged oppositely in the first direction X. The first bore section 12021 and the second bore section 12031 are relatively coaxially arranged. The first conductive member 30 and the second conductive member 40 are respectively embedded in the first hole section 12021 and the second hole section 12031, so that a gap exists between the first conductive member 30 and the second conductive member 40.

The first sub elastic member 1202 and the second sub elastic member 1203 may be in contact such that there is no gap between the first sub elastic member 1202 and the second sub elastic member 1203. In this embodiment, the surface of the first sub-elastic member 1202 facing the second sub-elastic member 1203 is closer to the second sub-elastic member 1203 than the surface of the first conductive member 30 facing the second sub-elastic member 1203, and the surface of the second sub-elastic member 1203 facing the first sub-elastic member 1202 is flush with the surface of the second conductive member 40 facing the first sub-elastic member 1202; or the surface of the first sub elastic member 1202 facing the second sub elastic member 1203 is flush with the surface of the first conductive member 30 facing the second sub elastic member 1203, and the surface of the second sub elastic member 1203 facing the first sub elastic member 1202 is closer to the first sub elastic member 1202 than the surface of the second conductive member 40 facing the first sub elastic member 1202; or the surface of the first sub elastic member 1202 facing the second sub elastic member 1203 is closer to the second sub elastic member 1203 than the surface of the first conductive member 30 facing the second sub elastic member 1203, and the surface of the second sub elastic member 1203 facing the first sub elastic member 1202 is closer to the first sub elastic member 1202 than the surface of the second conductive member 40 facing the first sub elastic member 1202.

The first sub elastic member 1202 and the second sub elastic member 1203 do not contact, so that a gap exists between the first sub elastic member 1202 and the second sub elastic member 1203.

In other embodiments, the resilient member 120 may be a unitary structure.

The first conductive member 30 and the second conductive member 40 are respectively embedded in the first hole 12021 of the first sub-elastic member 1202 and the second hole 12031 of the second sub-elastic member 1203, so that the first conductive member 30 and the second conductive member 40 can be maintained in a non-contact state without the first sub-elastic member 1202 and the second sub-elastic member 1203 being pressed. The first sub-elastic member 1202 and the second sub-elastic member 1203 are independent structures, and also facilitate independent installation and position adjustment of the first conductive member 30 and the second conductive member 40.

As shown in fig. 11, 12, and 13, in some embodiments, the battery pack 100 further includes: a first member 130 and a second member 140, the first member 130 and the second member 140 being disposed opposite to each other along a first direction X, the elastic member 120 being disposed between the first member 130 and the second member 140; the first conductive element 30 is fixed to the first member 130, and the second conductive element 40 is fixed to the second member 140.

The first member 130 and the second member 140 are each plate-shaped structures. The first conductive member 30 is mounted on a surface of the first member 130 facing the second member 140, and protrudes from the first member 130 toward the second member 140. The second conductive member 40 is mounted on a surface of the second member 140 facing the first member 130, and protrudes from the second member 140 toward the first member 130 in a direction approaching the second member 140.

The elastic member 120 is disposed between the first member 130 and the second member 140, and the battery module can drive the first member 130 and the second member 140 to move toward each other when expanding, so that the elastic member 120 is pressed by the first member 130 and the second member 140. The through hole 1201 of the elastic member 120 is disposed opposite to the first conductive member 30 and the second conductive member 40, and during the process of moving the first member 130 and the second member 140 toward each other, the first conductive member 30 and the second conductive member 40 are inserted into the through hole 1201 and move toward each other in the through hole 1201 until the two contact each other (as shown in fig. 13).

Two first connection portions 31 extend from two ends of the first conductive member 30, one of the two first connection portions 31 is used for connecting with one end of the first fusing portion, and the other of the two first connection portions 31 is used for electrically connecting with the first charging terminal 50. Two second connection parts 41 extend from both ends of the second conductive member 40, one of the two first connection parts 31 is used to connect with the second electrode terminal 13, and the other of the two first connection parts 31 is used to electrically connect with the second fuse 70.

The elastic element 120 is disposed between the first member 130 and the second member 140, and under the condition that the battery cell module 10 is not expanded or the expansion amount is small, the elastic element 120 can keep the first conductive element 30 and the second conductive element 40 in a non-contact state, so that the battery pack 100 can be charged and discharged normally. Under the great condition of battery cell module 10 inflation volume, battery cell module 10 can drive first component 130 and second component 140 and move in opposite directions to through first component 130 and the cooperation extrusion elastic component 120 of second component 140, in order to give the stable extrusion force of elastic component 120, so that first piece 30 and the second piece 40 of leading can in time stabilize the contact, in order to make first fuse 20 in time fuse, reduce the possibility of taking place the incident.

In some embodiments, the first member 130 and the second member 140 are insulators.

For example, the first member 130 and the second member are plastic plates. Of course, the first member 130 and the second member 140 may be conductors according to actual needs. The first and second members 130 and 140 are insulators, so that the first and second members 130 and 140 can be prevented from contacting with the components inside the battery pack 100 to cause short-circuiting of the battery pack 100.

Referring to fig. 1, 13, and 14, in some embodiments, the battery pack 100 further includes a housing 150, and the battery cell module 10, the elastic member 120, the first conductive member 30, and the second conductive member 40 are accommodated in the housing 150; the casing 150 includes a first wall 1501 and a second wall 1502, and the first wall 1501 is disposed opposite to the second wall 1502 along the first direction X, and the elastic member 120 is located between the cell module 10 and the first wall 1501.

The case 150 is formed with an accommodation space that accommodates the cell module 10. The housing 150 includes a first portion 1503 and a second portion 1504 arranged in opposition. The first portion 1503 and the second portion 1504 are mutually covered to define a receiving space for receiving the cell module 10. Of course, the connection between the first portion 1503 and the second portion 1504 may be sealed by a sealing member (not shown), such as a sealing ring, a sealant, etc.

The first portion 1503 and the second portion 1504 may be various shapes, such as a rectangular parallelepiped, a cylinder, and the like. In this embodiment, the first portion 1503 may be a hollow structure with one side open, the second portion 1504 may also be a hollow structure with one side open, and the opening side of the second portion 1504 is covered on the opening side of the first portion 1503 to form the housing 150 with a receiving space. Of course, the first portion 1503 may have a hollow structure with one side open, the second portion 1504 may have a plate-like structure, and the housing 150 having the accommodating space may be formed by covering the second portion 1504 on the open side of the first portion 1503.

In this embodiment, the first portion 1503 and the second portion 1504 are relatively closed along the second direction Y. Along the first direction X, the first portion 1503 includes opposing first and second plate portions 15031, 15032, and the second portion 1504 includes opposing third and fourth plate portions 15041, 15042. When the first portion 1503 and the second portion 1504 are fitted to each other, the first plate portion 15031 and the third plate portion 15041 form a first wall 1501 of the housing 150, and the second plate portion 15032 and the fourth plate portion 15042 form a second wall 1502 of the housing 150. The first direction X is perpendicular to the stacking direction of the plurality of battery cells 11.

The first conductive member 30 and the second conductive member 40 are also located between the cell module 10 and the first wall 1501. The elastic member 120 is located between the first wall 1501 of the cell module 10 and the casing 150, so that the cell module 10 and the first wall 1501 cooperate to extrude the elastic member 120, so that the first conductive member 30 and the second conductive member 40 are timely and stably contacted, and the first fusing part is fused in time.

With continued reference to fig. 1, in some embodiments, a plurality of limiting structures 1505 are disposed at intervals on a side wall of the casing 150 along a stacking direction of the plurality of battery cells 11, the limiting structures 1505 are disposed in one-to-one correspondence with the battery cells 11, and the limiting structures 1505 are used for limiting the movement of the battery cells 11 along the stacking direction, so as to improve the installation stability of the battery cells 11 in the casing 150.

For example, as shown in fig. 1, in some embodiments, the limiting structure 1505 includes a first engaging groove 15051 disposed on the first portion 1503 and a second engaging groove 15052 disposed on the second portion 1504, and two ends of the battery cell 11 along the second direction Y are respectively engaged with the first engaging groove 15051 and the second engaging groove 15052. The limiting structure 1505 in the form has a simple structure and a good limiting effect.

As shown in fig. 15, in some embodiments, the battery pack 100 further includes: the circuit board 160, the first fuse 20 and the second fuse 70 are disposed on the circuit board 160, the first conductive member 30 is connected to the circuit board 160 and connected to the first fuse 20 in series, and the second conductive member 40 is connected to the circuit board 160 and connected to the second fuse 70 in series.

The first conductive member 30 is connected to the circuit board 160 and is connected to the first fuse 20 in series, and it is understood that one end of the first conductive member 30 is connected to the circuit board 160 and the other end is connected to the first fuse 20. The second conductive member 40 is connected to the circuit board 160 and is connected in series with the second fuse 70, it being understood that one end of the second conductive member 40 is electrically connected to the circuit board 160 and the other end is connected to the second fuse 70. In the present embodiment, both the first connection parts 31 of the first conductive member 30 are connected to the circuit board 160, one second connection part 41 of the second conductive member 40 is connected to the second electrode terminal 13, and the other second connection part 41 is connected to the circuit board 160.

The embodiment of the present application further provides an electric device, which includes an electric main body and the battery pack 100 provided in any of the above embodiments. The battery pack 100 is used to supply power to a power using body.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (14)

1. The utility model provides a battery pack, includes the electric core module, the electric core module includes a plurality of electric cores, first electrode terminal and second electrode terminal, first electrode terminal with the polarity of second electrode terminal is opposite, its characterized in that:

the battery pack further comprises a first fuse, a first conductive piece and a second conductive piece, wherein the first fuse is electrically connected between the first electrode terminal and the first conductive piece, the second conductive piece is electrically connected with the second electrode terminal, and a gap is formed between the first conductive piece and the second conductive piece;

wherein the first conductive member and the second conductive member are configured to be capable of contacting each other to conduct a circuit in which the first electrode terminal, the first fuse, the first conductive member, the second conductive member, and the second electrode terminal are located, thereby disconnecting the first fuse.

2. The battery pack of claim 1, further comprising:

a first charging terminal, the first conductive member being electrically connected between the first charging terminal and the first electrode terminal;

and the second conductive piece is electrically connected between the second charging terminal and the second electrode terminal.

3. The battery pack according to claim 2, wherein the battery pack comprises:

a second fuse electrically connected between the second charging terminal and the second conductive member or between the first charging terminal and the first conductive member;

wherein the first conductive member and the second conductive member are configured to be capable of contacting each other to conduct a circuit in which the first charging terminal, the first conductive member, the second fuse, and the second charging terminal are located, thereby disconnecting the second fuse.

4. The battery pack of claim 1, further comprising:

a first discharging terminal, the first conductive member being electrically connected between the first discharging terminal and the first electrode terminal;

and the second conductive piece is electrically connected between the second discharge terminal and the second electrode terminal.

5. The battery pack according to claim 4, further comprising:

a third fuse electrically connected between the second discharging terminal and the second conductive member or between the first discharging terminal and the first conductive member;

wherein the first conductive member and the second conductive member are configured to be capable of contacting each other to conduct a circuit in which the first discharging terminal, the first conductive member, the second conductive member, the third fuse, and the second discharging terminal are located, thereby disconnecting the third fuse.

6. The battery pack of any of claims 1-5, wherein the first electrically conductive member is spaced from the second electrically conductive member along a first direction;

the first conductive member is configured to move toward the second conductive member in response to expansion of the cell module, so that a gap between the first conductive member and the second conductive member is reduced until the first conductive member and the second conductive member contact each other.

7. The battery pack of claim 6, further comprising:

the elastic piece and the battery cell module are arranged in parallel along the first direction, the plurality of battery cells are stacked, and the first direction is the stacking direction of the plurality of battery cells;

at least one of the first conductive member and the second conductive member is disposed on the elastic member.

8. The battery pack of claim 7, wherein the resilient member is configured to be compressed in response to expansion of the cell module to move the first conductive member toward the second conductive member.

9. The battery pack of claim 7, wherein the resilient member further comprises a through hole, at least one of the first and second conductive members being located at the through hole.

10. The battery pack of claim 9, wherein the elastic member comprises a first sub-elastic member and a second sub-elastic member, the through hole comprises a first hole section provided in the first sub-elastic member and a second hole section provided in the second sub-elastic member, the first conductive member is embedded in the first hole section, and the second conductive member is embedded in the second hole section.

11. The battery pack according to claim 7, further comprising:

the first member and the second member are oppositely arranged along the first direction, and the elastic piece is arranged between the first member and the second member;

the first conductive piece is fixed on the first component, and the second conductive piece is fixed on the second component.

12. The battery pack of claim 11, wherein the first member and the second member are insulators.

13. The battery pack according to claim 7, wherein: the battery pack further comprises a shell, and the battery cell module, the elastic piece, the first conductive piece and the second conductive piece are contained in the shell;

the casing includes first wall and second wall, follows first direction, first wall with the second wall sets up relatively, the elastic component is located the electricity core module with between the first wall.

14. An electrical device, comprising a battery pack according to any one of claims 1-13.

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