Battery pack and electric device with same

Abstract

The application discloses a battery pack and an electric device with the same, wherein the battery pack comprises a battery cell assembly and a coil, the battery cell assembly comprises a battery cell, and the coil is arranged around the outer periphery of the battery cell assembly, and the magnetic field direction of the coil is parallel to the ion movement direction of the battery cell. The battery pack of the embodiment of the application can avoid the growth of foreign matter dendrites such as metal lithium and copper to a certain extent in the process of charging and discharging of the battery cell, and can avoid the phenomenon of puncture of the diaphragm to a certain extent in the process of use of the battery pack, thereby prolonging the charging and discharging life of the battery pack and improving the safety performance of the battery pack.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery pack and an electric device with the same. BACKGROUND

[0002] At present, with the gradual popularization of new energy vehicles, batteries have been widely used in the market, especially lithium batteries with high energy density, no memory effect, long cycle life and other characteristics are widely used.

[0003] However, lithium batteries also have some problems in the process of charging and discharging, such as capacity attenuation, reduced safety, etc. Among them, a common failure phenomenon of lithium batteries is the formation of lithium dendrites, that is, irregular metal whiskers are deposited on the surface or inside of the negative electrode, which causes the battery to easily have problems such as increased internal resistance, capacity decline, and shortened cycle life, and in severe cases, it can also cause internal short circuit, thermal runaway, etc.

[0004] In the prior art, in order to solve the above problems, the formula of the electrolyte is usually improved, additives are added, the charging and discharging conditions are optimized, or special structure separators are used, but the above improvement methods cannot fundamentally solve the formation of lithium dendrites, which affects the performance and efficiency of the battery pack. SUMMARY

[0005] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a battery pack which can to some extent avoid the growth of dendrites, thereby to some extent avoid the problem of separator puncture during use of the battery pack, prolong the charging and discharging life of the battery pack and improve the safety performance of the battery pack, solving the problem of easy formation of dendrites in the prior art during use of the battery pack.

[0006] The present application also aims to provide an electric device with the above battery pack.

[0007] The battery pack according to the embodiments of the present application comprises: an electric core assembly comprising an electric core; a coil surrounding the outer periphery of the electric core assembly, the magnetic field direction of the coil being parallel to the ion movement direction of the electric core.

[0008] The battery pack according to the embodiments of the present application, by arranging the coil surrounding the outer periphery of the electric core assembly, and setting the magnetic field direction of the coil to be parallel to the ion movement direction of the electric core in the electric core assembly, the growth of metal lithium and copper and other foreign matter dendrites can be avoided to some extent during the charging and discharging of the electric core, thereby to some extent avoiding the phenomenon of separator puncture during use of the battery pack, prolonging the charging and discharging life of the battery pack and improving the safety performance of the battery pack.

[0009] In some embodiments, the battery pack further comprises a plurality of the battery cell assemblies, and the plurality of the battery cell assemblies are arranged in an array, and the plurality of the battery cell assemblies are parallel to each other in the direction of ion movement.

[0010] In some embodiments, the magnetic induction B generated by the coil is greater than or equal to 200 mT.

[0011] In some embodiments, the battery pack further comprises a protection assembly, the protection assembly is sleeved on the outer periphery of the battery cell assembly, and the coil is arranged in the protection assembly.

[0012] In some embodiments, the protection assembly comprises a first protection member sleeved on the outer periphery of the battery cell assembly, and a second protection member sleeved on the outer periphery of the first protection member, the first protection member and the second protection member form a cavity therebetween, and the coil is arranged in the cavity and around the first protection member.

[0013] In some embodiments, the first protection member and / or the second protection member is a polytetrafluoroethylene member.

[0014] In some embodiments, the protection assembly further comprises a support member arranged between the first protection member and the second protection member, and the support member is used for supporting the first protection member.

[0015] In some embodiments, the battery pack further comprises a cooling member for reducing the temperature of the coil.

[0016] In some embodiments, the cooling member comprises a cooling plate adapted to be filled with a cooling liquid, and the cooling plate is arranged in the cavity.

[0017] In some embodiments, the cooling plate is connected to the inner peripheral wall of the second protection member.

[0018] In some embodiments, the battery pack further comprises a detection member for detecting the temperature of the coil, and the cooling member is used for adjusting the temperature of the coil according to the detection result of the detection member.

[0019] In some embodiments, the detection member is arranged in the cavity.

[0020] In some embodiments, the battery cell assembly further comprises a shell, the shell is hollow inside to form a receiving cavity, the battery cell is arranged in the receiving cavity, and the protection assembly is sleeved on the outer periphery of the shell.

[0021] In some embodiments, the battery cell comprises a shell and a pole piece arranged in the shell, and the shell and / or the shell are paramagnetic material members.

[0022] In some embodiments, the bottom wall of the accommodating cavity is provided with a positioning groove, and the battery cell is positioned and matched in the positioning groove.

[0023] In some embodiments, the battery cell assembly further comprises a heat exchange member, which is in heat exchange with the battery cell, and is used for adjusting the temperature of the battery cell.

[0024] The power consuming device according to the embodiments of the present application comprises the battery pack as described above, and the battery pack is used for supplying power for the power consuming device.

[0025] The power consuming device according to the embodiments of the present application can improve the use safety of the power consuming device while ensuring the working performance of the power consuming device by using the battery pack as described above.

[0026] Additional aspects and advantages of the present application will become apparent from the following description, which is by way of illustration. BRIEF DESCRIPTION OF DRAWINGS

[0027] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description, with reference to the following figures, in which:

[0028] Figure 1 A schematic view of the battery pack of some embodiments of the present application.

[0029] Figure 2 A schematic view of the battery cell assembly of some embodiments of the present application.

[0030] Figure 3 A schematic view of the protection assembly when matched with the coil of some embodiments of the present application.

[0031] Figure 4 A schematic view of the tray of some embodiments of the present application.

[0032] REFERENCE SIGNS:

[0033] 1000, battery pack;

[0034] 100, battery cell assembly;

[0035] 110, battery cell;

[0036] 120, shell; 121, accommodating cavity; 122, positioning groove; 123, tray;

[0037] 200, coil;

[0038] 300, protection assembly; 310, first protection member; 320, second protection member; 330, cavity;

[0039] 400, cooling member; 500, detection member. DETAILED DESCRIPTION

[0040] Embodiments of the present application are described below in detail with reference to the accompanying drawings, wherein the same or similar components are denoted by the same or similar reference numerals throughout the drawings. The embodiments described below are exemplary and are for the purpose of explanation only, and are not to be understood as limiting the present application.

[0041] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0042] The battery pack 1000 of the embodiments of the present application is described below with reference to the accompanying drawings.

[0043] In combination with Figure 1 , Figure 2 and Figure 3 , a battery pack 1000 according to an embodiment of the present application includes a cell assembly 100 and a coil 200.

[0044] As shown in combination with Figure 1 and Figure 2 , the cell assembly 100 includes a cell 110.

[0045] In combination with Figure 1 , Figure 2 and Figure 3As shown, the coil 200 is arranged around the outer periphery of the battery cell assembly 100, and the magnetic field direction of the coil 200 is parallel to the ion movement direction of the battery cell 110. Here, it is referred to that the coil 200 is arranged around the outer periphery of the battery cell assembly 100, and the magnetic field direction of the coil 200 is set to be parallel to the ion movement direction of the battery cell 110, because when the magnetic field direction of the coil 200 is parallel to the charged ion movement direction of the battery cell 110, a micro-magnetohydrodynamic (micro-MHD) effect is generated, the current is deflected on the surface of the lithium or copper foreign matter, and a current component parallel to the current collector and a current component perpendicular to the current collector are generated. The current component parallel to the current collector and the magnetic field perpendicular to the current collector generate a Lorentz force, the micro-magnetohydrodynamic effect generates a micro-eddy current at a fixed position due to the limited range of its influence, thereby causing the lithium ions to be redistributed, the metal nucleation and growth to be more inclined to a 2D mode, and the growth of dendrites to be inhibited. Therefore, the growth of metal lithium and copper foreign matter dendrites during the operation of the battery pack 1000 can be effectively avoided, the problem of membrane puncture during the use of the battery pack 1000 can be avoided, the charge and discharge life of the battery pack 1000 is prolonged, the safety performance of the battery pack 1000 is improved, and the short circuit hazard is reduced.

[0046] It should be noted that when the coil 200 is energized, the current direction of the coil 200 can induce a magnetic field, wherein the current direction of the coil 200 of the present application can be understood as the direction indicated by the dashed arrow shown in Figure 3 It can be seen that the coil 200 of the present application can generate a magnetic field perpendicular to the paper and outward after being energized. Figure 3

[0047] In addition, the ion movement direction of the battery cell 110 refers to the direction of ion transmission between the positive electrode and the negative electrode, which can be specifically seen from the direction of the solid arrow shown in Figure 2 In combination with the directions shown in Figure 2 and Figure 3 It can be seen that the magnetic field direction of the coil 200 of the present application is parallel to the ion movement direction of the battery cell 110.

[0048] At the same time, by setting the coil 200 to form part of the battery pack 1000 and arranging the coil 200 around the outer periphery of the battery cell assembly 100, the coil 200 has the characteristic of moving with the battery cell assembly 100, so that the coil 200 can provide a repair function during the use of the battery pack 1000, improve the use efficiency of the coil 200, and improve the use safety of the battery pack 1000.

[0049] That is, the battery pack 1000 of the present application can in-situ regulate the performance of the battery cell 110 during the charge and discharge process, which is a non-destructive regulation scheme without damaging the battery pack 1000 body structure.

[0050] ​In summary, the application utilizes the principle that charged particles are deflected in a magnetic field, and the magnetic field triggers a micro-MHD effect in a fluid, to construct an electromagnetic coupling power battery package structure.

[0051] In a specific example, during the charging process (0.2C-3C AC or DC charging) of the battery package 1000, the coil 200 is energized, when the coil 200 is energized, the current direction of the coil 200 can induce a magnetic field perpendicular to the paper surface outward with constant strength, after the charging is completed, the magnetic field remains closed state during the normal operation of the vehicle, to avoid the growth of metal lithium and copper foreign matter dendritic in a certain extent during the use of the battery package 1000, prolong the charge and discharge life of the battery package 1000 and improve the safety performance of the battery package 1000.

[0052] From the above structure, the battery package 1000 of the embodiment of the application can avoid the growth of metal lithium and copper foreign matter dendritic in a certain extent during the charging and discharging of the battery 110 by setting the coil 200 around the outer periphery of the battery cell assembly 100 and setting the magnetic field direction of the coil 200 parallel to the ion movement direction of the battery cell 110, thereby avoiding the phenomenon of the diaphragm being pierced during the use of the battery package 1000 in a certain extent, prolonging the charge and discharge life of the battery package 1000 and improving the safety performance of the battery package 1000.

[0053] Meanwhile, by setting the coil 200 in the battery package 1000, the repair function can be provided by the coil 200 in real time during the use of the battery package 1000, the use efficiency of the coil 200 is improved, and the use safety of the battery package 1000 is improved.

[0054] It can be understood that, compared with the prior art, the coil 200 is arranged in the battery package 1000, and the magnetic field direction of the coil 200 is arranged parallel to the ion movement direction of the battery cell 110, so that the repair function can be provided by the coil 200 in real time during the use of the battery package 1000, the phenomenon of the diaphragm being pierced during the use of the battery package 1000 is avoided in a certain extent, the charge and discharge life of the battery package 1000 is prolonged, and the safety performance of the battery package 1000 is improved.

[0055] It should be noted that when the charge movement direction is perpendicular to the magnetic field direction, a macroscopic micro-MHD effect is generated, and the relatively large Lorentz force causes the ions to be deflected in a certain direction, a relatively dense surface is generated, that is, the continuous deposition of metal ions at a certain point is caused, and the dendritic growth is accelerated. In view of the above theory, the electrolyte fluidity is required, therefore, the battery cell 110 of the application is a non-gel battery and a non-solid battery, mainly a lithium ion battery with injected electrolyte.

[0056] In some embodiments, as shown in FIG. 1, the battery pack 1000 includes a plurality of battery cell assemblies 100, and each battery cell assembly 100 includes a plurality of battery cells 110. Figure 2 As shown in FIG. 1, the battery cell assembly 100 includes a plurality of battery cells 110, and the plurality of battery cells 110 are arranged in an array, and the ion movement directions of the plurality of battery cells 110 are parallel. By arranging the battery cell assembly 100 to include the plurality of battery cells 110, the capacity of the battery pack 1000 can be increased, and the working performance of the battery pack 1000 can be improved.

[0057] Meanwhile, by arranging the ion movement directions of the plurality of battery cells 110 to be parallel, the ion movement directions of the plurality of battery cells 110 are all parallel to the magnetic field direction of the coil 200, which is conducive to effectively avoiding the growth of metal lithium and copper foreign matter dendrites in the battery pack 1000 during use by using the coil 200, so that the problem of membrane puncture is less likely to occur during use of the battery pack 1000, the charge and discharge life of the battery pack 1000 is prolonged, the safety performance of the battery pack 1000 is improved, and the short circuit hazard is reduced.

[0058] It should be noted that the plurality of battery cells 110 of the battery cell assembly 100 can be arranged in a single cell array or in a module form, which is not specifically limited here.

[0059] In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0060] In some embodiments, the magnetic induction intensity B generated by the coil 200 after being energized is greater than or equal to 200 mT. Studies have shown that the growth of dendrites can be positively affected when the magnetic induction intensity B generated by the coil 200 after being energized is greater than or equal to 200 mT. Therefore, by arranging the magnetic induction intensity B generated by the coil 200 after being energized to be greater than or equal to 200 mT, the growth of metal lithium and copper foreign matter dendrites can be avoided to some extent, so that the problem of membrane puncture is less likely to occur during use of the battery pack 1000, the charge and discharge life of the battery pack 1000 is prolonged, the safety performance of the battery pack 1000 is improved, and the short circuit hazard is reduced.

[0061] In some embodiments, the magnetic induction intensity B generated by the coil 200 after being energized is 200 mT, 300 mT, or 400 mT, etc.

[0062] However, it should be noted that, due to the different sizes and formula systems of the battery cells 110, in specific examples, the magnetic induction intensity B generated by the coil 200 after being energized can need to be adjusted according to the experimental results of the battery cells 110. Meanwhile, since B = μNI / Le (where μ is the magnetic permeability, N is the number of turns of the coil 200, I is the current of the coil 200, and Le is the magnetic path length), the magnetic induction intensity generated by the coil 200 after being energized can be changed by adjusting the number of turns, the current size, and / or the effective path length of the coil 200.

[0063] In some embodiments, in combination with Figure 1 , Figure 2 and Figure 3 , the battery pack 1000 further comprises a protection assembly 300, the protection assembly 300 is sleeved on the outer periphery of the battery cell assembly 100, and the coil 200 is arranged in the protection assembly 300. While achieving the purpose of surrounding the coil 200 on the outer periphery of the battery cell assembly 100, the protection assembly 300 can also be used to protect the battery cell assembly 100 and the coil 200.

[0064] When the battery cell assembly 100 is protected by the protection assembly 300, the damage of the battery cell assembly 100 by external foreign matters can be avoided to some extent, the service life of the battery cell assembly 100 is prolonged, and the use safety of the battery cell assembly 100 is improved; when the coil 200 is protected by the protection assembly 300, the service life of the coil 200 is prolonged.

[0065] In specific embodiments, by arranging the coil 200 in the protection assembly 300, on the one hand, some magnetic substances outside the magnetic field can be prevented from being sucked into the coil 200, and the performance of the coil 200 is improved, and on the other hand, the corrosion of the coil 200 caused by the leakage of the battery cell 110 or acid and alkali substances can be avoided, and the service life of the coil 200 is prolonged.

[0066] That is, by arranging the coil 200 in the protection assembly 300, while achieving the purpose of surrounding the coil 200 on the outer periphery of the battery cell assembly 100, the performance of the coil 200 can be improved and the service life of the coil 200 can be prolonged.

[0067] In some embodiments, one end of the protection assembly 300 is opened, so as to facilitate the sleeving of the protection assembly 300 on the outer periphery of the battery cell assembly 100, and the assembly difficulty of the protection assembly 300 and the battery cell assembly 100 is reduced.

[0068] In specific examples, the battery cell assembly 100 can be pushed into the protection assembly 300 through the opening, so as to achieve the purpose of sleeving the protection assembly 300 on the outer periphery of the battery cell assembly 100.

[0069] In some embodiments, in combination with Figure 1 , Figure 2 and Figure 3 , the protection assembly 300 comprises a first protection member 310 and a second protection member 320, and the first protection member 310 is sleeved on the outer periphery of the battery cell assembly 100. The protection assembly 300 is sleeved on the outer periphery of the battery cell assembly 100, and the assembly difficulty of the protection assembly 300 and the battery cell assembly 100 is reduced, so that the coil 200 can be arranged around the outer periphery of the battery cell assembly 100, and the charge and discharge life of the battery pack 1000 is prolonged and the safety performance of the battery pack 1000 is improved by using the coil 200.

[0070] In the description of the present application, the features defined as "first", "second" can explicitly or implicitly include one or more of the features, for distinguishing the description features, without order and without emphasis.

[0071] In some embodiments, in combination with Figure 1 、 Figure 2 and Figure 3 shown, the second protective member 320 is spaced and sleeved on the outer periphery of the first protective member 310, a cavity 330 is formed between the first protective member 310 and the second protective member 320, and the coil 200 is arranged in the cavity 330 and around the first protective member 310. Here, when the second protective member 320 is spaced and sleeved on the outer periphery of the first protective member 310, a cavity 330 is formed between the first protective member 310 and the second protective member 320, and the coil 200 is arranged in the cavity 330 and around the first protective member 310. Since the first protective member 310 is sleeved on the outer periphery of the battery cell assembly 100, the coil 200 can be arranged around the outer periphery of the battery cell assembly 100, reducing the difficulty of cooperation between the coil 200 and the battery cell assembly 100, thereby facilitating the use of the coil 200 to prolong the charge and discharge life of the battery pack 1000 and improve the safety performance of the battery pack 1000.

[0072] At the same time, by arranging the coil 200 in the cavity 330, the assembly difficulty of the coil 200 and the protective assembly 300 can be reduced, so as to facilitate the protection of the coil 200 by the protective assembly 300, improve the performance of the coil 200, and prolong the service life of the coil 200.

[0073] In summary, the present application adopts the principle that the coil 200 generates a magnetic field when powered on, constructs a cavity 330 around the battery cell assembly 100, and places the coil 200 in the cavity 330. By adjusting the current intensity and the number of turns of the coil 200, the magnetic induction intensity generated after the coil 200 is powered on is adjusted to a certain extent to avoid the growth of metal lithium and copper foreign matter dendrites, so that the problem of membrane puncture is less likely to occur during the use of the battery pack 1000, prolonging the charge and discharge life of the battery pack 1000 and improving the safety performance of the battery pack 1000.

[0074] At the same time, in addition to the stable magnetic field, an alternating magnetic field can be introduced by alternating current to meet the needs of different power systems.

[0075] In some embodiments, the first protective member 310 and / or the second protective member 320 is a polytetrafluoroethylene member. Here, the first protective member 310 is a polytetrafluoroethylene member; or, the second protective member 320 is a polytetrafluoroethylene member; or, both the first protective member 310 and the second protective member 320 are polytetrafluoroethylene members.

[0076] When the first protective member 310 is a polytetrafluoroethylene member, the first protective member 310 is sleeved on the outer periphery of the battery cell assembly 100, which can prevent the battery cell 110 from leaking liquid or corrosive substances such as acid and base, and can prolong the service life of the coil 200.

[0077] When the second protective member 320 is a polytetrafluoroethylene member, some magnetic substances outside the magnetic field can be prevented from being sucked into the coil 200, thereby improving the performance of the coil 200.

[0078] When the first protective member 310 and the second protective member 320 are both polytetrafluoroethylene members, the application is equivalent to adding a polytetrafluoroethylene cavity to the outer periphery of the battery cell assembly 100, which can be well insulated, so that the cavity 330 can withstand high-voltage electric shock, thereby enabling the coil 200 to generate a high magnetic induction intensity after being energized, and to a certain extent, guarantee the working performance of the coil 200.

[0079] Meanwhile, when the first protective member 310 and the second protective member 320 are both polytetrafluoroethylene members, the following advantages are also provided:

[0080] First, polytetrafluoroethylene can withstand strong acid, strong base, and organic solvent corrosion, and is almost insoluble in any solvent, so it can ensure the chemical corrosion resistance of the protective assembly 300, thereby ensuring the performance of the protective assembly 300 and prolonging the service life of the protective assembly 300.

[0081] Second, the use temperature range of polytetrafluoroethylene is between -200°C and 260°C, and the short-term use temperature can reach 300°C, so the high-temperature resistance of the protective assembly 300 can be improved, and the cavity 330 can remain stable in a high-temperature environment.

[0082] Third, during vehicle movement, the coil 200 can rub or collide with the first protective member 310 and the second protective member 320. Since the friction coefficient of polytetrafluoroethylene is extremely low, by setting the first protective member 310 and the second protective member 320 to be polytetrafluoroethylene members, the service life of the coil 200 can be guaranteed, and the coil 200 can be used for a long time under high temperature and high speed conditions, thereby prolonging the service life of the coil 200.

[0083] Fourth, polytetrafluoroethylene is an insulating material, so the coil 200 can work under high voltage, which is a prerequisite for adjustable magnetic field.

[0084] In summary, by setting the first protective member 310 and the second protective member 320 to be polytetrafluoroethylene members, the coil 200 can work for a long time, safely and stably.

[0085] Of course, in other embodiments, the first protective member 310 and the second protective member 320 can also be ordinary plastic members.

[0086] In some embodiments, the protection assembly 300 further comprises a support member (not shown in the figure) disposed between the first protective member 310 and the second protective member 320, and the support member is used to support the first protective member 310. In order to improve the positional stability of the first protective member 310, and thus the relative position stability of the first protective member 310 and the second protective member 320 arranged at intervals, so as to form a stable cavity 330 between the first protective member 310 and the second protective member 320, so that the coil 200 can be arranged in the cavity 330, to a certain extent, to ensure the working performance of the coil 200.

[0087] In some embodiments, the support member is a support plate, which is arranged on the opposite sides of the first protective member 310 and is fixedly connected with the second protective member 320, so as to support the first protective member 310 by the support member, improve the positional stability of the first protective member 310, and reduce the support difficulty of the first protective member 310.

[0088] In some embodiments, as shown in Figure 1 The battery pack 1000 further comprises a cooling member 400, which is used to reduce the temperature of the coil 200. It should be noted that when the magnetic induction intensity generated by the coil 200 after being powered on is large, there may be a heat dissipation problem. By arranging the cooling member 400 to reduce the temperature of the coil 200, the coil 200 can be prevented from generating too much heat when powered on to a certain extent, which reduces the safety risk and is beneficial to prolong the service life of the coil 200.

[0089] In some embodiments, in combination with Figure 1 and Figure 3 The cooling member 400 comprises a cooling plate, which is adapted to be filled with a cooling liquid, and the cooling plate is arranged in the cavity 330. By arranging the cooling member 400 to comprise the cooling plate and filling the cooling liquid in the cooling plate, the temperature of the coil 200 can be reduced by the cooling member 400, thereby reducing the temperature adjustment difficulty of the coil 200, so that the temperature of the coil 200 during operation can be maintained within a suitable temperature range, and the service life of the coil 200 is prolonged.

[0090] At the same time, since the coil 200 is arranged in the cavity 330, by arranging the cooling plate in the cavity 330, the cooling plate can be arranged close to the coil 200, so as to reduce the temperature of the coil 200 by the cooling plate, thereby reducing the temperature adjustment difficulty of the coil 200.

[0091] In a specific example, when the cooling plate is arranged in the cavity 330, the cooling plate is used to reduce the temperature of the detection cavity 330, ensure the stability of the internal temperature of the cavity 330, achieve the purpose of reducing the temperature of the coil 200, and reduce the adjustment difficulty of the temperature of the coil 200.

[0092] In addition, by arranging the cooling plate in the cavity 330, the first protection member 310 and the second protection member 320 can also be used to protect the cooling plate, thereby prolonging the service life of the cooling plate.

[0093] In some embodiments, the cooling plate is connected with the inner circumferential wall of the second protection member 320. Here, when the cooling plate is arranged in the cavity 330, the cooling plate is connected with the inner circumferential wall of the second protection member 320, so as to support the cooling plate by the second protection member 320, improve the position stability of the cooling plate, and improve the performance of the cooling plate to a certain extent.

[0094] In some embodiments, the cooling plate is fixedly connected with the inner circumferential wall of the second protection member 320, so as to increase the connection strength between the cooling plate and the second protection member 320, and improve the position stability of the cooling plate.

[0095] Here, the fixed connection between the cooling plate and the inner circumferential wall of the second protection member 320 can be adhesion, clamping, or the like.

[0096] At the same time, by connecting the cooling plate with the inner circumferential wall of the second protection member 320, the cooling plate can also to a certain extent avoid occupying the space on the outer periphery of the first protection member 310, so as to arrange the coil 200 on the outer periphery of the first protection member 310, and reduce the arrangement difficulty of the coil 200.

[0097] In some embodiments, as shown in Figure 1 The battery pack 1000 also includes a detection member 500, which detects the temperature of the coil 200, and the cooling member 400 is used to adjust the temperature of the coil 200 according to the detection result of the detection member 500. Thus, the temperature of the coil 200 can be accurately adjusted, so that the temperature of the coil 200 can be maintained within a suitable temperature range when the coil 200 is energized, thereby improving the working performance of the coil 200 and prolonging the service life of the coil 200.

[0098] It should be noted that the detection member 500 can be understood as a temperature sensing device, such as a temperature sensor or a temperature meter, which is used to detect the temperature of the coil 200, so as to adjust the temperature of the coil 200, reduce the detection difficulty of the temperature of the coil 200, improve the accuracy of the detection, and thereby prolong the service life of the coil 200.

[0099] In some embodiments, the battery pack 1000 further comprises a controller (not shown in the figure) electrically connected with the cooling member 400 and the detection member 500 respectively, the detection member 500 is used to detect the temperature of the coil 200 in real time and send the detected result to the controller, when the controller judges that the temperature of the coil 200 is high, the controller controls the cooling member 400 to work to reduce the temperature of the coil 200 by using the cooling member 400.

[0100] In a specific example, when the temperature of the coil 200 is ≥80℃, the controller controls the cooling member 400 to start to cool the coil 200; when the temperature of the coil 200 is ≤30℃, the controller controls the cooling member 400 to exit the cooling, reduces the use cost of the cooling member 400, and prolongs the service life of the coil 200.

[0101] In some embodiments, in combination with Figure 1 and Figure 3 As shown in the figures, the detection member 500 is arranged in the cavity 330. Since the coil 200 is arranged in the cavity 330, by arranging the detection member 500 in the cavity 330, the detection member 500 can be arranged close to the coil 200, so as to facilitate detecting the temperature of the coil 200 by using the detection member 500, and reduce the difficulty of detecting the temperature of the coil 200.

[0102] At the same time, by arranging the detection member 500 in the cavity 330, the first protection member 310 and the second protection member 320 can be used to cooperate to protect the detection member 500, and prolong the service life of the detection member 500.

[0103] It should be noted that since the coil 200 is located in the cavity 330, when the detection member 500 is arranged in the cavity 330, the temperature of the cavity 330 can be directly detected by using the detection member 500, so as to achieve the purpose of detecting the temperature of the coil 200, and reduce the difficulty of detecting the temperature of the coil 200.

[0104] When the temperature of the cavity 330 is detected by using the detection member 500, when the temperature of the cavity 330 is ≥80℃, the controller controls the cooling member 400 to start to cool the cavity 330, so as to achieve the purpose of cooling the coil 200; when the temperature of the coil 200 is ≤30℃, the controller controls the cooling member 400 to exit the cooling.

[0105] In some embodiments, in combination with Figure 1 and Figure 3 As shown in the figures, the detection member 500 is arranged on the inner circumferential wall of the second protection member 320 and is fixedly connected with the inner circumferential wall of the second protection member 320. While achieving the purpose of arranging the detection member 500 in the cavity 330, the second protection member 320 can also be used to support the detection member 500, improve the position stability of the detection member 500, and improve the detection performance of the detection member 500 to a certain extent.

[0106] The fixed connection between the detection component 500 and the inner peripheral wall of the second protective component 320 can be by bonding, snap-fitting, etc.

[0107] Meanwhile, by placing the detection element 500 on the inner peripheral wall of the second protective element 320, the detection element 500 can be avoided to some extent from occupying the space on the outer periphery of the first protective element 310, so that the coil 200 can be set on the outer periphery of the first protective element 310, reducing the difficulty of arranging the coil 200.

[0108] In some embodiments, combined with Figure 1 and Figure 2 As shown, the battery cell assembly 100 also includes a housing 120, the interior of which is hollow to form a receiving cavity 121. The battery cell 110 is disposed within the receiving cavity 121, and the protective assembly 300 is sleeved on the outer periphery of the housing 120. By placing the battery cell 110 within the receiving cavity 121, the battery cell 110 can be placed within the housing 120, thereby protecting and supporting the battery cell 110, extending its service life, improving its positional stability, and to a certain extent ensuring its working performance.

[0109] Meanwhile, by sleeved the protection component 300 on the outer periphery of the housing 120, the protection component 300 is sleeved on the outer periphery of the cell assembly 100. This not only protects the cell assembly 100 with the protection component 300, but also allows the coil 200 to be arranged around the outer periphery of the cell assembly 100. This helps to extend the charge and discharge life of the battery pack 1000 and improve the safety performance of the battery pack 1000 by utilizing the coil 200.

[0110] In some embodiments, the outer casing 120 is made of a paramagnetic material. Because paramagnetic materials have weak shielding ability against magnetic fields, they do not affect the migration of ions inside the cell 110 by the magnetic field, thereby preventing the outer casing 120 from affecting the magnetic field to suppress the growth of dendrites of foreign matter such as lithium metal and copper.

[0111] In some embodiments, the housing 120 may be made of aluminum, such that the housing 120 is a paramagnetic material.

[0112] The relative permeability of aluminum is μr≈1.00002.

[0113] Of course, in some other embodiments, the housing 120 may also be made of plastic.

[0114] In some embodiments, the battery cell 110 includes a housing and electrodes disposed within the housing, wherein the housing of the battery cell 110 is made of a paramagnetic material. This is to a certain extent to prevent the housing of the battery cell 110 from affecting the magnetic field's influence on the migration of ions inside the battery cell 110, thereby preventing the housing of the battery cell 110 from affecting the magnetic field's inhibition of dendritic growth of foreign matter such as metallic lithium and copper.

[0115] In some embodiments, the material of the shell of the battery cell 110 can be an aluminum plastic film and aluminum, so that the shell of the battery cell 110 becomes a paramagnetic material piece.

[0116] In some embodiments, as shown in Figure 1 , Figure 2 and Figure 4 , the bottom wall of the accommodating cavity 121 is provided with a positioning groove 122, and the battery cell 110 is positioned and fitted in the positioning groove 122. On the one hand, the assembly difficulty of the battery cell 110 can be reduced, and on the other hand, the position of the battery cell 110 can be limited and fixed by the positioning groove 122, and the position stability of the battery cell 110 can be improved.

[0117] In some embodiments, as shown in Figure 1 , Figure 2 and Figure 4 , the shell 120 includes a tray 123, which is arranged in the accommodating cavity 121 and on the bottom wall of the accommodating cavity 121, and the tray 123 is provided with the positioning groove 122. In order to realize the positioning groove 122 arranged on the bottom wall of the accommodating cavity 121, and reduce the forming difficulty of the positioning groove 122.

[0118] In some embodiments, the tray 123 can be formed as an integral piece with the bottom wall of the accommodating cavity 121, so that the tray 123 is formed as part of the side wall of the shell 120, and the fixing difficulty of the tray 123 is reduced.

[0119] In other embodiments, the tray 123 can be formed as a separate piece from the bottom wall of the accommodating cavity 121, so that the tray 123 is formed as a separate piece from the side wall of the shell 120, and the forming difficulty of the tray 123 is reduced.

[0120] In some embodiments, during the assembly of the battery cell 110, the battery cell 110 is positioned and fitted in the positioning groove 122, and the ion motion direction of the battery cell 110 is perpendicular to the paper surface, and at the same time, the magnetic field direction of the coil 200 is also perpendicular to the paper surface. This placement can realize the influence of the above-mentioned micro-MHD, so as to avoid the growth of foreign matter dendrites such as metal lithium and copper by using the coil 200, prolong the charge and discharge life of the battery pack 1000, and improve the safety performance of the battery pack 1000.

[0121] In some embodiments, the battery cell assembly 100 further includes a heat exchange piece (not shown in the figure), which exchanges heat with the battery cell 110. The heat exchange piece is used to adjust the temperature of the battery cell 110. In order to enable the temperature of the battery cell 110 during work to be maintained within a suitable temperature range, prolong the service life of the battery cell 110, and improve the use safety of the battery cell 110, and to a certain extent, guarantee the working performance of the battery cell 110, and further guarantee the working performance of the battery pack 1000.

[0122] Wherein, the adjusting temperature of the battery cell 110 includes increasing the temperature of the battery cell 110 and decreasing the temperature of the battery cell 110.

[0123] In a specific example, when the temperature of the battery cell 110 is higher than the preset temperature range, the heat exchange member is used to decrease the temperature of the battery cell 110; when the temperature of the battery cell 110 is lower than the preset temperature range, the heat exchange member is used to increase the temperature of the battery cell 110, so that the temperature of the battery cell 110 can be maintained within the appropriate temperature range.

[0124] In some embodiments, the heat exchange member is a heat exchange pipe or a heat exchange plate, and the heat exchange pipe or the heat exchange plate is filled with a heat exchange medium (such as refrigerant), and the heat exchange medium exchanges heat with the battery cell 110 to adjust the temperature of the battery cell 110.

[0125] In some embodiments, the battery cell assembly 100 further comprises a BMS (Battery Management System), which is used for intelligent management and maintenance of the battery cell 110, prevents overcharging and overdischarging of the battery cell 110, prolongs the service life of the battery cell 110, and monitors the state of the battery cell 110.

[0126] It should be noted that due to the introduction of the magnetic field in the battery pack 1000, the BMS and the like need to be shielded from the magnetic field to ensure the normal work of the elements, and therefore, in some embodiments, the BMS is provided with a magnetic shielding protective cover and a magnetic shielding coating and the like protection devices to protect the BMS.

[0127] In addition, the battery cell 110 of the present application can be a lithium metal battery, a lithium-oxygen battery, a lithium-sulfur battery, and a sodium-ion battery, etc.

[0128] The following describes a power consuming device of an embodiment of the present application.

[0129] A power consuming device according to an embodiment of the present application comprises: a battery pack 1000, which is used for supplying power to the power consuming device.

[0130] Wherein, the battery pack 1000 is the aforementioned battery pack 1000, and the specific structure of the battery pack 1000 is not described herein.

[0131] From the above structure, it can be seen that the power consuming device of the embodiment of the present application adopts the aforementioned battery pack 1000 to ensure the working performance of the power consuming device and improve the use safety of the power consuming device.

[0132] It should be noted that the power consuming device of the present application includes but is not limited to vehicles, ships, spacecraft, etc.

[0133] Wherein, when the power consuming device is a vehicle, the vehicle can be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile, or a range extended automobile, etc.

[0134] In the description of the present application, it is necessary to point out that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "linking" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0135] Other configurations of the battery pack 1000 and the electric device having the same according to the embodiments of the present application, such as the specific structure inside the battery pack 1000, the specific structure and cooling principle of the cooling member 400, and the specific structure and heat exchange principle of the heat exchange member, are known to those skilled in the art, and will not be described in detail here.

[0136] In the description of the present application, the description referring to the terms "embodiment", "example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0137] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that, include: A battery cell assembly (100) includes a housing (120) and a battery cell (110). A coil (200) is arranged around the outer periphery of the cell assembly (100), and the magnetic field direction of the coil (200) is parallel to the ion movement direction of the cell (110). A protective component (300) includes a first protective member (310), a second protective member (320), and a support member. The first protective member (310) is sleeved on the outer periphery of the outer shell (120), and the second protective member (320) is sleeved at intervals on the outer periphery of the first protective member (310). The support member is disposed between the first protective member (310) and the second protective member (320) and is used to support the first protective member (310). A cavity (330) is formed between the first protective member (310) and the second protective member (320). The coil (200) is disposed in the cavity (330) and surrounds the first protective member (310). A cooling element (400) is provided to reduce the temperature of the coil (200). The cooling element (400) includes a cooling plate, which is adapted to be filled with coolant and is disposed in the cavity (330).

2. The battery pack according to claim 1, characterized in that, The battery cell assembly (100) includes a plurality of battery cells (110), which are arranged in an array and the ion movement directions of the plurality of battery cells (110) are parallel.

3. The battery pack according to claim 1, characterized in that, The magnetic induction intensity B generated by the coil (200) after being energized is ≥200mT.

4. The battery pack according to claim 1, characterized in that, The first protective element (310) and / or the second protective element (320) are polytetrafluoroethylene (PTFE) parts.

5. The battery pack according to claim 1, characterized in that, The cooling plate is connected to the inner peripheral wall of the second protective member (320).

6. The battery pack according to claim 1, characterized in that, It also includes a detection element (500) for detecting the temperature of the coil (200), and the cooling element (400) is used to adjust the temperature of the coil (200) according to the detection result of the detection element (500).

7. The battery pack according to claim 6, characterized in that, The detection element (500) is disposed inside the cavity (330).

8. The battery pack according to claim 1, characterized in that, The battery cell (110) includes a housing and an electrode disposed within the housing, wherein the housing and / or the outer shell (120) are made of paramagnetic material.

9. The battery pack according to claim 1, characterized in that, The bottom wall of the outer casing (120) is provided with a positioning groove (122), and the battery cell (110) is positioned and fitted in the positioning groove (122).

10. The battery pack according to any one of claims 1-9, characterized in that, The battery cell assembly (100) also includes a heat exchanger that exchanges heat with the battery cell (110) and is used to adjust the temperature of the battery cell (110).

11. An electrical appliance, characterized in that, Includes a battery pack according to any one of claims 1-10, the battery pack being used to supply power to the electrical device.

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