Energy storage device and electric equipment

Abstract

The utility model discloses an energy storage device and electric equipment. The energy storage device comprises a plurality of single batteries and a plurality of busbars. The single battery is provided with a pole. The plurality of busbars are connected to the poles of the plurality of single batteries, at least one busbar in the plurality of busbars is provided with two first split bodies and a second split body, and each first split body comprises a first connecting part and an electrode connecting part which are connected with each other; the electrode connecting parts of the two first split bodies are respectively connected to the poles of two single batteries in the plurality of single batteries, the two ends of the second split body are provided with second connecting parts, and the two second connecting parts of the second split body are respectively detachably connected to the first connecting parts of the two first split bodies; the first connecting part is provided with a first limiting structure, the second connecting part is provided with a second limiting structure, and the first limiting structure is in limiting fit with the second limiting structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage, in particular to an energy storage device and an electric equipment. BACKGROUND

[0002] The energy storage device includes a plurality of single batteries and a plurality of busbars. The plurality of busbars are connected to the pole columns of the plurality of single batteries to connect the plurality of single batteries in series or in parallel, forming a battery module. The busbar generally has low resistance and good conductivity, which has strong advantages in reducing energy loss and improving the energy conversion efficiency of the battery. At the same time, the busbar also has good chemical stability and mechanical strength, which can ensure that it maintains good performance during battery operation and has sufficient durability to meet long-term cyclic use in different environments.

[0003] However, in the related art, if a single battery needs to be removed due to failure or needs to be recharged, the busbar corresponding to the single battery needs to be damaged and removed from the pole column of the single battery. The removed busbar cannot be reused, causing resource waste. UTILITY MODEL CONTENT

[0004] The present application provides an energy storage device and an electric equipment to solve the problem that the busbar cannot be reused after being removed in the related art.

[0005] The energy storage device of the present application embodiment comprises:

[0006] a plurality of single batteries, the single battery having a pole column;

[0007] a plurality of busbars connected to the pole columns of the plurality of single batteries, at least one of the plurality of busbars having two first parts and one second part, the first part including a first connecting portion and an electrode connecting portion connected to each other, the electrode connecting portions of the two first parts being connected to the pole columns of two single batteries in the plurality of single batteries, respectively, the second part having second connecting portions at both ends, the two second connecting portions of the second part being detachably connected to the first connecting portions of the two first parts, respectively; the first connecting portion having a first limiting structure, the second connecting portion having a second limiting structure, the first limiting structure and the second limiting structure being limitedly matched.

[0008] The energy storage device of the embodiment of the present application, the busbar includes two first parts and one second part, the second part is detachably connected with the first part, since the busbar adopts the three-section part design, when it is needed to independently operate one of the plurality of single batteries, only the second part of the busbar corresponding to the single battery is detached from the first part, the single battery can be separated from the remaining single batteries without damaging the first part of the busbar corresponding to the remaining single batteries. In addition, after the second part is detached from the first part, the second part still maintains the original shape and performance, so the second part can be reused, thereby saving the cost. In addition, the first limiting structure and the second limiting structure with the limiting cooperation between the first connecting part and the second connecting part can avoid the misalignment of the first part and the second part when connecting the first part and the second part, thereby ensuring the position accuracy between the first connecting part and the second connecting part.

[0009] According to some embodiments of the present application, one of the first limiting structure and the second limiting structure is a groove, and the other is a protrusion, and the protrusion is limited in the groove.

[0010] In the embodiment of the present application, the protrusion and the groove are limited and cooperated, which facilitates the connection of the first part and the second part and improves the assembly efficiency.

[0011] According to some embodiments of the present application, the second connecting part is overlapped on one side of the first connecting part away from the single battery.

[0012] In the embodiment of the present application, the second connecting part and the first connecting part are connected in the overlapping manner, which can improve the overall overload capacity of the busbar.

[0013] According to some embodiments of the present application, the second connecting part and the first connecting part are detachably connected through a fastener.

[0014] In the embodiment of the present application, the first connecting part and the second connecting part are connected through the fastener, which can improve the firmness after the connection of the first connecting part and the second connecting part.

[0015] According to some embodiments of the present application, the first connecting part has a first threaded hole, the second connecting part has a second threaded hole, and one side of the second connecting part away from the first connecting part further has a first sink groove, and the second threaded hole penetrates through the groove bottom surface of the first sink groove.

[0016] The fastener is a screw, and has a nail cap and a nail rod, the nail cap is connected to one end of the nail rod, the nail rod is screwed into the first threaded hole and the second threaded hole, and at least part of the nail cap is located in the first sink groove.

[0017] In the embodiments of the present application, the shank connects the first connecting part and the second connecting part, and at least part of the nail cap is located in the first sink, thereby reducing the space occupied by the screw in the thickness direction of the busbar.

[0018] According to some embodiments of the present application, the side of the nail cap away from the single battery has a first surface, the side of the second connecting part away from the single battery has a second surface, and the first surface is flush with the second surface.

[0019] In the embodiments of the present application, after the screw is screwed with the first connecting part and the second connecting part, the first surface of the nail cap is flush with the second surface of the second connecting part, so that the side where the second surface of the second connecting part is located is smoother, thereby avoiding scratching other components in the energy storage device due to the nail cap protruding from the second surface.

[0020] According to some embodiments of the present application, the first connecting part has at least one first step, and the first limiting structure is arranged on the first step.

[0021] The second connecting part has at least one second step matched with the first step, and the second limiting structure is arranged on the second step.

[0022] In the embodiments of the present application, the first connecting part and the second connecting part are connected in a stepped splicing manner, which can increase the contact area of the joint surface between the first connecting part and the second connecting part, thereby having greater contact force and friction, which helps to enhance the connection strength between the first connecting part and the second connecting part. Because the contact area between the first connecting part and the second connecting part is increased, the stepped structure can disperse stress, reduce local stress concentration, enhance vibration resistance, and ensure the current carrying capacity of the busbar under the action of vibration and impact force.

[0023] According to some embodiments of the present application, the first connecting part has three first steps arranged in sequence, the first limiting structure is a groove, and is arranged on the tread of the first step located in the middle position of the three first steps.

[0024] The second connecting part has three second steps, the second limiting structure is a protrusion, and is arranged on the tread of the second step located in the middle position of the three second steps, and the protrusion is limited in the groove.

[0025] According to some embodiments of the present application, the second part is made of a flexible conductive material.

[0026] In the embodiments of the present application, the second part is made of a flexible conductive material, so that the distance between the two first parts of the busbar can be adjusted by elongating or compressing the second part, so that the two first parts of the busbar can be connected to the pole columns of the two single batteries with different distances, improving the versatility of the busbar, without the need to additionally design busbars with different lengths, saving costs.

[0027] The present application also provides a kind of energy storage device, comprising:

[0028] A plurality of single batteries, the single battery has a pole column; and

[0029] A plurality of busbars are connected to the pole columns of the plurality of single batteries, and the plurality of busbars have a lead-out busbar, the lead-out busbar has a first part and a third part, the first part includes a first connecting part and an electrode connecting part connected to each other, the electrode connecting part is connected to the pole column of the single battery, the third part includes a third connecting part and a lead-out part connected to each other, the third connecting part is detachably connected to the first connecting part, and the lead-out part is used to connect with external equipment.

[0030] In the embodiments of the present application, the lead-out busbar adopts a two-section design, when the single battery connected with the lead-out busbar needs to be operated independently, the first part and the third part are only separated, so that the single battery can be separated from the remaining single batteries, without the need to remove the third part from the external equipment. After the first part and the third part are separated, the third part still maintains the original shape and performance, and can be reused, saving costs.

[0031] According to some embodiments of the present application, the first connecting part has a first limiting structure, the third connecting part has a third limiting structure, and the first limiting structure and the third limiting structure limit each other.

[0032] In the embodiments of the present application, the first connecting part and the third connecting part have a first limiting structure and a third limiting structure for limiting each other, when the first part and the third part are connected, the two limiting structures can avoid misalignment of the first part and the third part, ensuring the positional accuracy between the first connecting part and the third connecting part.

[0033] According to some embodiments of the present application, one of the first limiting structure and the third limiting structure is a protrusion, and the other is a groove, and the protrusion is limited in the groove.

[0034] In the embodiments of the present application, the protrusion and the groove limit each other, which facilitates the connection of the first part and the third part, and improves the assembly efficiency.

[0035] According to some embodiments of the present application, the third connecting part is overlapped with the first connecting part on the side away from the single battery.

[0036] In the embodiments of the present application, the third connecting part is connected with the first connecting part in an overlapping manner, which can improve the overload capacity of the whole busbar.

[0037] According to some embodiments of the present application, the third connecting part is detachably connected with the first connecting part by a fastener.

[0038] In the embodiments of the present application, the first connecting part and the third connecting part are connected by a fastener, which can improve the firmness of the connection between the first connecting part and the third connecting part.

[0039] According to some embodiments of the present application, the first connecting part has a first threaded hole, the third connecting part has a third threaded hole, and the side of the third connecting part away from the first connecting part further has a second recess, and the third threaded hole penetrates through the bottom surface of the second recess.

[0040] The fastener is a screw having a head and a shank, the head is connected to one end of the shank, the shank is screwed into the first threaded hole and the third threaded hole, and at least part of the head is located in the second recess.

[0041] In the embodiments of the present application, the shank connects the first connecting part and the third connecting part, and at least part of the head is located in the second recess, which reduces the space occupied by the screw in the thickness direction of the busbar.

[0042] According to some embodiments of the present application, the side of the head away from the single battery has a first surface, the side of the third connecting part away from the single battery has a third surface, and the first surface is flush with the third surface.

[0043] In the embodiments of the present application, after the screw is screwed with the first connecting part and the third connecting part, the first surface of the head is flush with the third surface of the third connecting part, which makes the side where the third surface is located more smooth, avoiding scratching other components in the energy storage device due to the head protruding from the third surface.

[0044] According to some embodiments of the present application, the first connecting part has at least one first step, and the first limiting structure is arranged on the first step.

[0045] The third connecting part has at least one third step matched with the first step, and the third limiting structure is arranged on the third step.

[0046] In the embodiments of the present application, the first connecting part and the third connecting part are connected in a stepped splicing manner, which can increase the contact area of the joint surface between the first connecting part and the third connecting part, thereby having greater contact force and friction, which helps to enhance the connection strength between the first connecting part and the third connecting part. Since the contact area between the first connecting part and the third connecting part is increased, under the action of vibration and impact force, the stepped structure can disperse stress, reduce local stress concentration, enhance the anti-vibration capability, and ensure the current carrying capacity of the busbar.

[0047] According to some embodiments of the present application, the first connecting part has three first steps arranged in sequence, the first limiting structure is a groove, and is arranged on the tread surface of the first step located in the middle position among the three first steps;

[0048] The third connecting part has three third steps, the third limiting structure is a protrusion, and is arranged on the tread surface of the third step located in the middle position among the three third steps, and the protrusion is limited in the groove.

[0049] According to some embodiments of the present application, the third connecting part is arranged perpendicularly to the lead-out part.

[0050] The power consumption equipment of the embodiments of the present application comprises the energy storage device of any one of the above, and the energy storage device supplies power to the power consumption equipment. BRIEF DESCRIPTION OF DRAWINGS

[0051] The drawings incorporated into the specification and forming a part thereof, illustrate embodiments consistent with the present application and, together with the specification, serve to explain the principles of the present application. It is apparent that the drawings described below are only some embodiments of the present disclosure, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art.

[0052] Figure 1 is a structural schematic diagram of a household energy storage system.

[0053] Figure 2 is a disassembled schematic diagram of a plurality of busbars and a plurality of single batteries.

[0054] Figure 3 is a perspective schematic diagram of one of the busbars.

[0055] Figure 4 is Figure 3 is a disassembled schematic diagram from one perspective.

[0056] Figure 5 is Figure 3 is a disassembled schematic diagram from another perspective.

[0057] Figure 6 is a sectional view along Figure 3 A-A sectional line in FIG. 2.

[0058] Figure 7 is a perspective view of the busbar.

[0059] Figure 8 is Figure 7 an exploded view in one perspective.

[0060] Figure 9 is Figure 7 an exploded view in another perspective.

[0061] Figure 10 is a sectional view along Figure 7 B-B sectional line in FIG. 3.

[0062] In the drawings, the reference signs are explained as follows:

[0063] 1, energy storage device; 2, electric energy conversion device; 3, user load;

[0064] 100, single cell; 110, pole;

[0065] 200, busbar; 200a, busbar; 200b, connecting busbar;

[0066] 210, first part; 211, first limiting structure; 212, first connecting part; 2121, first threaded hole; 2122, first step; 213, electrode connecting part;

[0067] 220, second part; 221, second limiting structure; 222, second connecting part; 2221, second threaded hole; 2222, first sink groove; 2223, second surface; 2224, second step;

[0068] 230, third part; 231, third limiting structure; 232, third connecting part; 2321, third threaded hole; 2322, second sink groove; 2323, third surface; 2324, third step; 233, leading-out part;

[0069] 300, fastener; 300a, screw; 310, nail cap; 311, first surface; 320, nail rod. DETAILED DESCRIPTION

[0070] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0071] It is understood that the terms "comprising" and "having," and any variations thereof, in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to these processes, methods, products, or devices.

[0072] Since the energy people need is highly time- and space-dependent, in order to make rational use of energy and improve energy efficiency, it is necessary to use a medium or device to store one form of energy in the same way or by converting it into another form of energy, and then release it in a specific form of energy based on future application needs.

[0073] Current energy storage applications are quite widespread, including generation-side energy storage, grid-side energy storage, renewable energy grid-connected energy storage, and user-side energy storage. The corresponding types of energy storage devices include:

[0074] (1) Large energy storage containers used in grid-side energy storage scenarios can serve as high-quality active and reactive power regulation power sources in the grid, enabling load matching of electrical energy in time and space, enhancing the absorption capacity of renewable energy, and playing a significant role in grid system backup, alleviating peak load power supply pressure, and peak regulation and frequency regulation.

[0075] (2) Small and medium-sized energy storage cabinets used in commercial and industrial energy storage scenarios (banks, shopping malls, etc.) and small household energy storage boxes used in residential energy storage scenarios primarily operate under the "peak shaving and valley filling" mode. Because there are significant price differences in electricity consumption during peak and off-peak periods, users with energy storage devices typically charge the cabinets / boxes during off-peak hours to reduce costs; during peak hours, they release the stored electricity for use, thus saving on electricity bills. Furthermore, in remote areas and regions prone to natural disasters such as earthquakes and hurricanes, the existence of household energy storage devices effectively provides backup power for users and the power grid, eliminating the inconvenience caused by frequent power outages due to disasters or other reasons.

[0076] This explanation will take the residential energy storage scenario in user-side energy storage as an example. Figure 1A household energy storage system is shown, which includes an energy storage device 1 and an electric energy conversion device 2 (such as a photovoltaic panel), and a user load 3 (such as street lamps, household appliances, etc.), the energy storage device 1 is a small energy storage box, which can be installed on the outdoor wall by wall hanging. Specifically, the electric energy conversion device 2 can convert solar energy into electric energy during the low price period, and store it through the energy storage device 1, and then supply it to the user load 3 for use during the peak price period, or supply it to the user load 3 for use during the power grid outage / power failure.

[0077] And in the case of energy storage by physical or electrochemical means as described above, taking electrochemical energy storage as an example, the energy storage device 1 includes at least one set of chemical batteries, which use chemical elements in the chemical batteries as energy storage media to achieve the charging and discharging process through chemical reactions or changes of the energy storage media. In short, the electric energy generated by light energy and wind energy is stored in at least one set of chemical batteries through chemical reactions or changes of the energy storage medium, and then the electric quantity stored in at least one set of chemical batteries is released for use through chemical reactions or changes of the energy storage medium when the use of external electric energy reaches the peak, or transferred to places where electric quantity is in short supply for use.

[0078] As shown in Figure 2 The embodiment of the present application provides an energy storage device 1, which can be but is not limited to a battery pack, and an energy storage cabinet, an energy storage container, etc. including the battery pack. Next, taking the energy storage device 1 as a battery pack as an example for description.

[0079] As shown in Figure 2 The battery pack includes a plurality of single batteries 100 and a plurality of busbars 200, the plurality of single batteries 100 are arranged side by side, each single battery 100 has a pole 110, and the plurality of busbars 200 are connected to the poles 110 of the plurality of single batteries 100 to realize series connection or parallel connection of the plurality of single batteries 100, thereby forming a battery module.

[0080] Among them, the single battery 100 can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead-acid battery, etc.

[0081] As shown in Figure 2As shown in the figure, the plurality of busbars 200 includes two outgoing busbars 200a, which are used to connect with external devices (not shown in the figure). One of the outgoing busbars 200a is used as the positive outgoing terminal of the battery module, and the other outgoing busbar 200a is used as the negative outgoing terminal of the battery module. The two outgoing busbars 200a are connected with the positive and negative terminals of the external devices, respectively. The external devices include, but are not limited to, devices that need to be powered by the battery module or devices that test the single battery 100. The busbars other than the two outgoing busbars 200a in the plurality of busbars 200 are defined as connecting busbars 200b. The two ends of each connecting busbar 200b are used to connect the poles 110 of two single batteries 100, respectively.

[0082] As shown in the figure, Figures 3 to 5 At least one of the plurality of connecting busbars 200b has two first parts 210 and one second part 220. The first part 210 includes a first connecting portion 212 and an electrode connecting portion 213 connected with each other. The electrode connecting portions 213 of the two first parts 210 are connected with the poles 110 of two single batteries 100 in the plurality of single batteries 100, respectively. The second part 220 has two second connecting portions 222 at its two ends. The two second connecting portions 222 of the second part 220 are detachably connected with the first connecting portions 212 of the two first parts 210, respectively. The first connecting portion 212 has a first limiting structure 211, and the second connecting portion 222 has a second limiting structure 221. The first limiting structure 211 and the second limiting structure 221 are in limiting cooperation.

[0083] The energy storage device 1 of the embodiment has the busbar including two first parts 210 and one second part 220. The second part 220 is detachably connected with the first part 210. Since the busbar is designed in three sections, when one single battery 100 in the plurality of single batteries 100 needs to be operated independently, the second part 220 of the busbar corresponding to the single battery 100 is detached from the first part 210. Thus, the single battery 100 can be separated from the remaining single batteries 100 without damaging the first part 210 of the busbar corresponding to the remaining single batteries 100. After the second part 220 is detached from the first part 210, the second part 220 still maintains the original shape and performance. Therefore, the second part 220 can be reused, which saves the cost. In addition, the first connecting portion 212 and the second connecting portion 222 have the first limiting structure 211 and the second limiting structure 221 in limiting cooperation. When the first part 210 and the second part 220 are connected, the two limiting structures can avoid misalignment of the first part 210 and the second part 220, and ensure the positional accuracy between the first connecting portion 212 and the second connecting portion 222.

[0084] It should be noted that the independent operation of one of the plurality of single batteries 100 can include but is not limited to the following:

[0085] 1. After the plurality of single batteries 100 form a battery module, if one of the single batteries 100 fails, the single battery 100 needs to be removed from the battery module and replaced with a normal single battery 100. When removing, only the first part 210 corresponding to the connection bus bar 200b of the failed single battery 100 needs to be removed, and the second part 220 and the other first part 210 do not need to be removed.

[0086] 2. During the module level test, due to the difference in consistency of the plurality of single batteries 100, one or several single batteries 100 may have low power, and the single battery 100 with low power needs to be recharged. Before recharging, only the first part 210 corresponding to the single battery 100 with low power is removed from the second part 220, so that the single battery 100 is disconnected from the remaining single batteries 100.

[0087] 3. During the module level heat spread test, one of the single batteries 100 in the battery module needs to be triggered to heat out of control. At this time, only the first part 210 corresponding to the target single battery 100 is removed from the second part 220, so that the single battery 100 is disconnected from the remaining single batteries 100.

[0088] In an embodiment, the electrode connecting part 213 of the first part 210 and the pole 110 of the single battery 100 can be connected by welding or bolt connection and the like. Using screw connection or bolt connection improves the firmness of the connection, and can further resist the vibration and impact generated by the single battery 100 during charging and discharging.

[0089] As shown in Figure 4 and Figure 5 , one of the first limiting structure 211 and the second limiting structure 221 is a groove, and the other is a protrusion, and the protrusion is limited in the groove.

[0090] For example, the first limiting structure 211 is a groove, and the second limiting structure 221 is a protrusion; or the first limiting structure 211 is a protrusion, and the second limiting structure 221 is a groove.

[0091] In the embodiments of the present application, the protrusion and the groove limit the cooperation, which facilitates the connection of the first part 210 and the second part 220, and improves the assembly efficiency.

[0092] Of course, in other embodiments, one of the first limiting structure 211 and the second limiting structure 221 can also be a limiting column, and the other can be a limiting hole, and the limiting column is limited in the limiting hole.

[0093] As shown in Figures 3 to 4 the second connecting portion 222 is overlapped on the first connecting portion 212 on the side away from the single battery 100.

[0094] In the embodiment of the present application, the second connecting portion 222 and the first connecting portion 212 are connected in an overlapping manner, which can improve the overload capacity of the busbar as a whole.

[0095] As shown in Figure 4 and Figure 5 the second connecting portion 222 and the first connecting portion 212 are detachably connected through the fastener 300. In the embodiment of the present application, the first connecting portion 212 and the second connecting portion 222 are connected through the fastener 300, which can improve the firmness after the first connecting portion 212 and the second connecting portion 222 are connected.

[0096] In an embodiment, the first connecting portion 212 has a first threaded hole 2121, the second connecting portion 222 has a second threaded hole 2221, and the second connecting portion 222 further has a first sink 2222 on the side away from the first connecting portion 212, and the second threaded hole 2221 penetrates the bottom surface of the first sink 2222. The fastener 300 is a screw 300a, and the screw 300a has a nail cap 310 and a nail rod 320, and the nail cap 310 is connected to one end of the nail rod 320. The nail rod 320 is screwed into the first threaded hole 2121 and the second threaded hole 2221, and at least part of the nail cap 310 is located in the first sink 2222.

[0097] In the embodiment of the present application, the nail rod 320 connects the first connecting portion 212 and the second connecting portion 222, and at least part of the nail cap 310 is located in the first sink 2222, which reduces the space occupied by the screw 300a in the thickness direction of the busbar.

[0098] It can be understood that the first threaded hole 2121 can be a through hole or a blind hole. The second threaded hole 2221 is a through hole.

[0099] As shown in Figure 6 the side of the nail cap 310 away from the single battery 100 has a first surface 311, the side of the second connecting portion 222 away from the single battery 100 has a second surface 2223, and the first surface 311 is flush with the second surface 2223.

[0100] In the embodiment of the present application, after the screw 300a is screwed with the first connecting portion 212 and the second connecting portion 222, since the first surface 311 of the nail cap 310 is flush with the second surface 2223 of the second connecting portion 222, the side where the second surface 2223 of the second connecting portion 222 is located is smoother, which avoids scratching other components in the energy storage device 1 due to the nail cap 310 protruding from the second surface 2223.

[0101] As shown in Figures 4 to 6 The first connecting part 212 has at least one first step 2122, and the first limiting structure 211 is arranged on the first step 2122. The second connecting part 222 has at least one second step 2224 matched with the first step 2122, and the second limiting structure 221 is arranged on the second step 2224.

[0102] In the embodiment, the first connecting part 212 and the second connecting part 222 are connected in a stepped manner, which can increase the contact area of the joint surface between the first connecting part 212 and the second connecting part 222, thereby having greater contact force and friction, which helps to enhance the connection strength between the first connecting part 212 and the second connecting part 222. Because the contact area between the first connecting part 212 and the second connecting part 222 is larger, under the action of vibration and impact force, the stepped structure can disperse stress, reduce local stress concentration, enhance the anti-vibration ability, and ensure the current carrying capacity of the busbar.

[0103] As shown in Figure 4 The first connecting part 212 of the first part 210 has three first steps 2122 arranged in sequence, and the first limiting structure 211 is a groove arranged on the tread surface of the first step 2122 located in the middle position of the three first steps 2122.

[0104] As shown in Figure 5 The second connecting part 222 of the second part 220 has three second steps 2224 arranged in sequence, and the second limiting structure 221 is a protrusion arranged on the tread surface of the second step 2224 located in the middle position of the three second steps 2224. The protrusion is limited in the groove.

[0105] As an example, when the first connecting part 212 has one first step 2122, and the second connecting part 222 has one second step 2224 matched with the first step 2122, after the first step 2122 and the second step 2224 are spliced, the second surface 2223 of the second connecting part 222 is flush with the side surface of the first part 210 away from the monomer battery 100, which can reduce the volume of the connecting busbar 200b in the thickness direction, and is conducive to saving space in the battery pack.

[0106] In one embodiment, the second component 220 is made of a flexible conductive material. In related technologies, the length of the busbar is fixed, meaning the distance between the two electrode connections 213 of the busbar is constant. When heat insulation pads of different thicknesses are placed between two adjacent individual cells 100 in a battery module, the distance between the terminals 110 of the two adjacent individual cells 100 will change. In this case, the two electrode connections 213 of the busbar may not be able to connect to the terminals 110 of the two individual cells 100.

[0107] In this embodiment, by designing the second component 220 to be made of a flexible conductive material, the distance between the electrode connection portions 213 of the two first components 210 of the busbar can be finely adjusted by stretching or compressing the second component 220, so that the two first components 210 of the busbar can be connected to the terminals 110 of two single cells 100 at different distances, which improves the versatility of the busbar and eliminates the need to design busbars of different lengths, thus saving costs.

[0108] like Figures 7 to 9 As shown, the lead-out bus 200a has a first part 210 and a third part 230. The first part 210 includes a first connecting part 212 and an electrode connecting part 213 connected to each other. The electrode connecting part 213 is connected to the terminal post 110 of the single cell 100. The third part 230 includes a third connecting part 232 and a lead-out part 233 connected to each other. The third connecting part 232 is detachably connected to the first connecting part 212, and the lead-out part 233 is used to connect to external devices.

[0109] In this embodiment, the busbar 200a adopts a two-section split design. When it is necessary to operate the individual battery 100 connected to the busbar 200a independently, it is only necessary to separate the first split 210 from the third split 230 to detach the individual battery 100 from the other individual batteries 100, without having to remove the third split 230 from the external device. After the first split 210 and the third split 230 are separated, the third split 230 still retains its original shape and performance, can be reused, and saves costs.

[0110] In one embodiment, the third connecting portion 232 is disposed perpendicularly to the lead-out portion 233. Of course, in other embodiments, the third connecting portion 232 and the lead-out portion 233 may also be disposed at an acute angle or an obtuse angle.

[0111] like Figure 8 and Figure 9 As shown, the first connecting part 212 has a first limiting structure 211, and the third connecting part 232 has a third limiting structure 231. The first limiting structure 211 and the third limiting structure 231 are in a limiting cooperation.

[0112] The first connecting part 212 and the third connecting part 232 have a first limiting structure 211 and a third limiting structure 231 that provide a limiting fit. When connecting the first part 210 and the third part 230, the two limiting structures can prevent the first part 210 and the third part 230 from being misaligned, thus ensuring the positional accuracy between the first connecting part 212 and the third connecting part 232.

[0113] In one embodiment, one of the first limiting structure 211 and the third limiting structure 231 is a protrusion and the other is a groove, with the protrusion located within the groove.

[0114] For example, the first limiting structure 211 is a groove and the third limiting structure 231 is a protrusion; or, the first limiting structure 211 is a protrusion and the third limiting structure 231 is a groove.

[0115] In the embodiments of this application, the protrusion and the groove are matched to facilitate the connection between the first part 210 and the third part 230, thereby improving the assembly efficiency.

[0116] Of course, in other embodiments, one of the first limiting structure 211 and the third limiting structure 231 may be a limiting post and the other may be a limiting hole, with the limiting post being limited within the limiting hole.

[0117] like Figure 7 As shown, the third connecting part 232 overlaps the first connecting part 212 on the side facing away from the single cell 100.

[0118] In the embodiments of this application, the third connecting part 232 and the first connecting part 212 are connected by an overlapping method, which can improve the overall overload capacity of the busbar 200a.

[0119] like Figure 8 and Figure 9 As shown, the third connecting part 232 is detachably connected to the first connecting part 212 by a fastener 300. In this embodiment of the application, connecting the first connecting part 212 and the third connecting part 232 by the fastener 300 can improve the firmness of the connection between the first connecting part 212 and the third connecting part 232.

[0120] In one embodiment, the first connecting portion 212 has a first threaded hole 2121, the third connecting portion 232 has a third threaded hole 2321, and the side of the third connecting portion 232 facing away from the first connecting portion 212 also has a second recess 2322, with the third threaded hole 2321 penetrating the bottom surface of the second recess 2322. The fastener 300 is a screw 300a, and the screw 300a has a head 310 and a shank 320. The head 310 is connected to one end of the shank 320, and the shank 320 is screwed into the first threaded hole 2121 and the third threaded hole 2321. At least a portion of the head 310 is located in the second recess 2322.

[0121] In the embodiment of the present application, the shank 320 connects the first connecting portion 212 and the third connecting portion 232, and at least part of the nail cap 310 is located in the second sink 2322, thereby reducing the space occupied by the screw 300a in the thickness direction of the busbar.

[0122] It can be understood that the first threaded hole 2121 can be a through hole or a blind hole. The third threaded hole 2321 is a through hole.

[0123] As shown in Figure 10 , the side of the nail cap 310 away from the single battery 100 has a first surface 311, and the side of the third connecting portion 232 away from the single battery 100 has a third surface 2323, and the first surface 311 is flush with the third surface 2323.

[0124] In the embodiment of the present application, after the screw 300a is screwed with the first connecting portion 212 and the third connecting portion 232, because the first surface 311 of the nail cap 310 is flush with the third surface 2323 of the third connecting portion 232, the side where the third surface 2323 of the third connecting portion 232 is located is smoother, avoiding scratching other components in the energy storage device 1 due to the nail cap 310 protruding from the third surface 2323.

[0125] As shown in Figures 8 to 10 , the first connecting portion 212 has at least one first step 2122, and the first limiting structure 211 is arranged on the first step 2122; the third connecting portion 232 has at least one third step 2324 matched with the first step 2122, and the third limiting structure 231 is arranged on the third step 2324.

[0126] In the embodiment of the present application, the first connecting portion 212 and the third connecting portion 232 are connected in a stepped splicing manner, which can increase the contact area of the joint surface between the first connecting portion 212 and the third connecting portion 232, thereby having greater contact force and friction, which helps to enhance the connection strength between the first connecting portion 212 and the third connecting portion 232. Because the contact area between the first connecting portion 212 and the third connecting portion 232 is larger, under the action of vibration and impact force, the stepped structure can disperse stress, reduce local stress concentration, enhance vibration resistance, and ensure the current carrying capacity of the busbar.

[0127] As shown in Figure 8 , the first connecting portion 212 has three first steps 2122 arranged in sequence, and the first limiting structure 211 is a groove, and the groove is arranged on the tread of the first step 2122 located in the middle position among the three first steps 2122.

[0128] As shown in Figure 9As shown, the third connecting portion 232 has three third steps 2324, and the third limiting structure 231 is a protrusion arranged on the tread surface of the third step 2324 located in the middle position among the three third steps 2324, and the protrusion is limited in the groove.

[0129] As an example, when the first connecting portion 212 has one first step 2122 and the third connecting portion 232 has one third step 2324 matched with the first step 2122, after the first step 2122 and the third step 2324 are spliced, the third surface 2323 of the third connecting portion 232 is flush with the side surface of the monomer battery 100 away from the electrode connecting portion 213 of the first body 210.

[0130] The application also provides a power utilization device comprising the energy storage device 1 of any one of the above, and the energy storage device 1 supplies power for the power utilization device.

[0131] It can be understood that the various embodiments / embodiments provided by the application can be combined with each other without contradiction, and will not be illustrated one by one here.

[0132] In the embodiments of the application, the terms "first", "second", "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; the term "multiple" refers to two or more, unless otherwise explicitly limited. The terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, "connecting" can be fixed connection, can also be detachable connection, or integrally connected; "connected" can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the application can be understood according to the specific circumstances.

[0133] In the description of the embodiments of the application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or units referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the embodiments of the application.

[0134] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "specific embodiments" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the application. In the present application, 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.

[0135] The above merely provides preferred embodiments of the application, and is not intended to limit the application. The application can be variously changed and modified by those skilled in the art. Any modification, equivalent replacement, improvement, and the like made within the spirit and principle of the application shall fall within the protection scope of the application.

Claims

1. An energy storage device, characterized by, The application relates to a battery, comprising: a plurality of single batteries, each of which has a pole; a plurality of busbars connected to the poles of the single batteries, at least one of the busbars has two first parts and a second part, the first part comprises a first connecting part and an electrode connecting part connected to each other, the electrode connecting parts of the two first parts are connected to the poles of two single batteries respectively, the second part has second connecting parts at both ends, and the second connecting parts of the second part are detachably connected to the first connecting parts of the two first parts respectively; the first connecting part has a first limiting structure, and the second connecting part has a second limiting structure; the first limiting structure and the second limiting structure are in limiting cooperation. One of the first limiting structure and the second limiting structure is a groove, and the other is a protrusion, the protrusion is limited in the groove.

2. The energy storage device of claim 1, wherein, The second connecting part is overlapped on one side of the first connecting part away from the single battery.

3. The energy storage device of claim 1, wherein, The second connecting part is detachably connected to the first connecting part through a fastener.

4. The energy storage device of claim 3, wherein, The first connecting part has a first threaded hole, the second connecting part has a second threaded hole, and one side of the second connecting part away from the first connecting part further has a first sink groove, and the second threaded hole penetrates the bottom surface of the first sink groove; 5. The energy storage device of claim 4, wherein, The fastener is a screw, and has a nail cap and a nail rod, the nail cap is connected to one end of the nail rod, the nail rod is screwed into the first threaded hole and the second threaded hole, and at least part of the nail cap is located in the first sink groove. One side of the nail cap away from the single battery has a first surface, one side of the second connecting part away from the single battery has a second surface, and the first surface is flush with the second surface.

6. The energy storage device of claim 5, wherein, The first connecting part has at least one first step, and the first limiting structure is arranged on the first step; 7. The energy storage device of claim 3, wherein, The second connecting part has at least one second step matched with the first step, and the second limiting structure is arranged on the second step. The first connecting part has three first steps arranged in sequence, the first limiting structure is a groove, and is arranged on the tread surface of the first step in the middle position of the three first steps; 8. The energy storage device of claim 7, wherein, The second connecting part has three second steps, the second limiting structure is a protrusion, and is arranged on the tread surface of the second step in the middle position of the three second steps, and the protrusion is limited in the groove. The second part is made of a flexible conductive material.

9. The energy storage device of any one of claims 1-8, wherein, The application relates to a battery, comprising:

10. An energy storage device, characterized by, a plurality of single batteries, each of which has a pole; a plurality of busbars connected to the poles of the single batteries, at least one of the busbars has two first parts and a second part, the first part comprises a first connecting part and an electrode connecting part connected to each other, the electrode connecting parts of the two first parts are connected to the poles of two single batteries respectively, the second part has second connecting parts at both ends, and the second connecting parts of the second part are detachably connected to the first connecting parts of the two first parts respectively; the first connecting part has a first limiting structure, and the second connecting part has a second limiting structure; the first limiting structure and the second limiting structure are in limiting cooperation. One of the first limiting structure and the second limiting structure is a groove, and the other is a protrusion, the protrusion is limited in the groove. The second connecting part is overlapped on one side of the first connecting part away from the single battery. The second connecting part is detachably connected to the first connecting part through a fastener. The first connecting part has a first threaded hole, the second connecting part has a second threaded hole, and one side of the second connecting part away from the first connecting part further has a first sink groove, and the second threaded hole penetrates the bottom surface of the first sink groove; The fastener is a screw, and has a nail cap and a nail rod, the nail cap is connected to one end of the nail rod, the nail rod is screwed into the first threaded hole and the second threaded hole, and at least part of the nail cap is located in the first sink groove. One side of the nail cap away from the single battery has a first surface, one side of the second connecting part away from the single battery has a second surface, and the first surface is flush with the second surface. The first connecting part has at least one first step, and the first limiting structure is arranged on the first step; The second connecting part has at least one second step matched with the first step, and the second limiting structure is arranged on the second step. The first connecting part has three first steps arranged in sequence, the first limiting structure is a groove, and is arranged on the tread surface of the first step in the middle position of the three first steps; The second connecting part has three second steps, the second limiting structure is a protrusion, and is arranged on the tread surface of the second step in the middle position of the three second steps, and the protrusion is limited in the groove. The second part is made of a flexible conductive material. The application relates to a battery, comprising: a plurality of single batteries, each of which has a pole; a plurality of busbars connected to the poles of the single batteries, at least one of the busbars has two first parts and a second part, the first part comprises a first connecting part and an electrode connecting part connected to each other, the electrode connecting parts of the two first parts are connected to the poles of two single batteries respectively, the second part has second connecting parts at both ends, and the second connecting parts of the second part are detachably connected to the first connecting parts of the two first parts respectively; the first connecting part has a first limiting structure, and the second connecting part has a second limiting structure; the first limiting structure and the second limiting structure are in limiting cooperation. One of the first limiting structure and the second limiting structure is a groove, and the other is a protrusion, the protrusion is limited in the groove. The second connecting part is overlapped on one side of the first connecting part away from the single battery. The second connecting part is detachably connected to the first connecting part through a fastener. The first connecting part has a first threaded hole, the second connecting part has a second threaded hole, and one side of the second connecting part away from the first connecting part further has a first sink groove, and the second threaded hole penetrates the bottom surface of the first sink groove; The fastener is a screw, and has a nail cap and a nail rod, the nail cap is connected to one end of the nail rod, the nail rod is screwed into the first threaded hole and the second threaded hole, and at least part of the nail cap is located in the first sink groove. One side of the nail cap away from the single battery has a first surface, one side of the second connecting part away from the single battery has a second surface, and the first surface is flush with the second surface. The first connecting part has at least one first step, and the first limiting structure is arranged on the first step; The second connecting part has at least one second step matched with the first step, and the second limiting structure is arranged on the second step. The first connecting part has three first steps arranged in sequence, the first limiting structure is a groove, and is arranged on the tread surface of the first step in the middle position of the three first steps; The second connecting part has three second steps, the second limiting structure is a protrusion, and is arranged on the tread surface of the second step in the middle position of the three second steps, and the protrusion is limited in the groove. The second part is made of a flexible conductive material.

11. The energy storage device of claim 10, wherein, The first connecting part has a first limiting structure, and the third connecting part has a third limiting structure, the first limiting structure and the third limiting structure are in limiting cooperation.

12. The energy storage device of claim 11, wherein, One of the first limiting structure and the third limiting structure is a protrusion, and the other is a groove, the protrusion is limited in the groove.

13. The energy storage device of claim 11, wherein, The third connecting part is overlapped on the side of the first connecting part away from the single battery.

14. The energy storage device of claim 13, wherein, The third connecting part is detachably connected with the first connecting part through a fastener.

15. The energy storage device of claim 14, wherein, The first connecting part has a first threaded hole, the third connecting part has a third threaded hole, and the side of the third connecting part away from the first connecting part further has a second sink groove, the third threaded hole penetrates the bottom surface of the second sink groove; The fastener is a screw, and has a nail cap and a nail rod, the nail cap is connected to one end of the nail rod, the nail rod is screwed into the first threaded hole and the third threaded hole, and at least part of the nail cap is located in the second sink groove.

16. The energy storage device of claim 15, wherein, The side of the nail cap away from the single battery has a first surface, the side of the third connecting part away from the single battery has a third surface, and the first surface is flush with the third surface.

17. The energy storage device of claim 13, wherein, The first connecting part has at least one first step, and the first limiting structure is arranged on the first step; The third connecting part has at least one third step matched with the first step, and the third limiting structure is arranged on the third step.

18. The energy storage device of claim 17, wherein, The first connecting part has three first steps arranged in sequence, the first limiting structure is a groove, and is arranged on the tread surface of the first step in the middle position among the three first steps; The third connecting part has three third steps, the third limiting structure is a protrusion, and is arranged on the tread surface of the third step in the middle position among the three third steps, and the protrusion is limited in the groove.

19. The energy storage device of any one of claims 10-18, wherein, The third connecting part is arranged perpendicularly to the lead-out part.

20. An electrical device, comprising: The energy storage device includes any one of claims 1-19, and the energy storage device supplies power to the power-using equipment.

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