Battery device, energy storage equipment and power utilization system

Abstract

The utility model discloses a battery device, energy storage equipment and a power utilization system, the battery device comprises a plurality of battery cells, an insulating support and a connecting piece, each battery cell at least comprises a tab, and the tabs of the plurality of battery cells are located on the same side of the plurality of battery cells; the insulating bracket is arranged on one side of the tabs of the plurality of battery cells; and the connecting sheet is arranged on the insulating bracket and is electrically connected with the tab. And compared with the scheme of welding with a printed circuit board, the manufacturing difficulty and the manufacturing cost are remarkably reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery device, energy storage equipment and an electricity system. Background Art

[0002] With the development of battery technology, the design of multiple battery cells in series and parallel has come into being. By welding multiple battery cells to the printed circuit board through the tabs, electrical conductivity of each battery cell can be achieved.

[0003] However, welding the tabs to the printed circuit board is difficult and has high manufacturing costs. Utility Model Content

[0004] The utility model aims to provide a battery device, an energy storage device and an electric system, which can solve the problems of great difficulty in welding a tab to a printed circuit board and high manufacturing cost.

[0005] In order to achieve the purpose of the utility model, the utility model provides the following technical solutions:

[0006] In a first aspect, the utility model provides a battery device, comprising: each of the battery cells comprises at least one pole lug, and the pole lugs of the multiple battery cells are located on the same side of the multiple battery cells; an insulating bracket, arranged on one side of the pole lugs of the multiple battery cells; a connecting plate, arranged on the insulating bracket, and the connecting plate is electrically connected to the pole lug.

[0007] In one embodiment, the insulating support is provided with a through hole, the tab is passed through the through hole, and the connecting piece is arranged on a surface of the insulating support facing away from the battery cell and close to an inner wall of the through hole.

[0008] In one embodiment, the insulating support is provided with a through hole, and the connecting piece includes: a connecting piece body, the connecting piece body is arranged on a surface of the insulating support facing away from the battery cell; and a connecting portion, the connecting portion is passed through the through hole.

[0009] In one embodiment, the pole lugs of each of the battery cells include at least a first pole lug and a second pole lug, the first pole lug and the second pole lug have opposite polarities, there are multiple through holes, and the multiple through holes are spaced apart from each other, and the first pole lug and the second pole lug of each of the battery cells are arranged in different through holes.

[0010] In one embodiment, there are multiple connecting pieces, and the first pole tab and the second pole tab of the same battery cell are connected to different connecting pieces.

[0011] In one embodiment, the plurality of connecting sheets are arranged along an arrangement direction of the plurality of battery cells, and / or the plurality of connecting sheets are arranged along a direction from a first pole tab to a second pole tab of the same battery cell.

[0012] In one embodiment, the connecting piece includes a main body and multiple branch parts, one end of each of the branch parts is connected to the main body, and the multiple branch parts are arranged at intervals. The multiple branch parts are arranged one by one at the inner wall near the multiple through holes, and each branch part is connected to one of the pole ears.

[0013] In one embodiment, a plurality of the first pole ears are arranged in a row along the arrangement direction of the battery cells, and a plurality of the second pole ears are arranged in another row along the arrangement direction of the battery cells. The first pole ears and the second pole ears of the same battery cell are spaced apart, the main body extends along the arrangement direction of the plurality of the battery cells, and the branch portion extends from the first pole ears to the direction of the second pole ears.

[0014] In one embodiment, the battery device further includes a first buffer member, which is disposed at a connection between the battery cell and the tab, and the insulating bracket abuts against the first buffer member.

[0015] In one embodiment, the battery cell is a soft-pack battery cell, and the battery device also includes a first side plate, a second side plate and a plurality of pull plates, wherein the first side plate and the second side plate are respectively arranged on opposite sides of an arrangement direction of the plurality of battery cells, and the two ends of the plurality of pull plates are respectively connected to the first side plate and the second side plate, and the plurality of battery cells are located in a receiving space enclosed by the first side plate, the second side plate and the plurality of pull plates.

[0016] In one embodiment, the battery device also includes at least one layer plate, the first side plate and the second side plate are both provided with a snap-in groove, the layer plate has a snap-in protrusion, the snap-in protrusion is inserted into the snap-in groove so that the layer plate is snap-fitted and fixed to the first side plate and the second side plate, the layer plate divides the receiving space into a plurality of sub-spaces, each sub-space receiving a plurality of the battery cells.

[0017] In one embodiment, the battery device further includes a second buffer member, which is disposed on at least one surface of the first side plate, the second side plate, and the plurality of pull plates that faces the receiving space.

[0018] In one embodiment, at least one surface of the plurality of battery cells is provided with a plurality of spaced apart pulling plates, and the battery device further comprises an insulating film, which is located in the gaps between the plurality of pulling plates and attached to the surfaces of the plurality of battery cells.

[0019] In a second aspect, the utility model further provides an energy storage device, comprising a plurality of energy storage devices, each of which is provided with at least one battery device, the plurality of energy storage devices being arranged along a first direction, the plurality of energy storage devices being electrically connected to each other via plug-in terminals, or the plurality of energy storage devices being electrically connected to each other via wiring harnesses, and the battery device being any one of the battery devices described in any one of the various embodiments of the first aspect.

[0020] In one embodiment, a plurality of the energy storage devices are electrically connected via a wiring harness, and a gripping member is provided on the side of at least one of the energy storage devices, wherein the gripping member comprises: a gripping portion, which is suitable for gripping to move the energy storage device; and a wiring harness arranging portion, which is suitable for limiting the wiring harness connecting the plurality of the energy storage devices.

[0021] In a third aspect, the utility model further provides an electricity system, characterized in that it comprises an electricity device and a battery device described in any one of the various embodiments of the first aspect, wherein the battery device supplies power to the electricity device, or comprises an electricity device and an energy storage device described in the second aspect, wherein the energy storage device supplies power to the electricity device.

[0022] The battery device provided by the utility model realizes series-parallel connection between multiple battery cells by arranging an insulating bracket and a connecting piece, wherein the connecting piece is arranged on the insulating bracket, and a plurality of pole ears are electrically connected to the connecting piece, thereby significantly reducing the manufacturing difficulty and manufacturing cost compared with the solution of welding with a printed circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 is a perspective view of a battery device according to an embodiment;

[0025] Figure 2 is an exploded view of a battery device according to an embodiment;

[0026] Figure 3 The present invention is a stereoscopic diagram of an insulating bracket and a connecting piece of an embodiment.

[0027] Description of reference numerals:

[0028] 10-battery cell, 21-first pole ear, 22-second pole ear, 30-insulating bracket, 31-through hole, 40-connecting piece, 41-main body, 42-branch, 43-first terminal, 44-second terminal, 50-first buffer, 61-first side plate, 62-second side plate, 621-clamping groove, 63-pull plate, 631-main plate, 632-first side portion, 633-second side portion, 64-layer plate, 641-clamping protrusion, 70-second buffer, 80-insulating film, X-first direction, Y-second direction, Z-third direction. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0031] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meaning as those commonly understood by technicians in the technical field of this utility model. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used in this utility model includes any and all combinations of one or more related listed items.

[0032] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0033] Please refer to Figures 1 to 3 An embodiment of the utility model provides a battery device, including a plurality of battery cells 10 , a plurality of tabs, an insulating bracket 30 and a connecting sheet 40 .

[0034] First define the directions: the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0035] The plurality of battery cells 10 are arranged in sequence, specifically, arranged in sequence in the first direction X. The battery cell 10 may be a battery cell 10 with an aluminum shell, or a soft-pack battery cell 10, without limitation. The thickness direction of the battery cell 10 is the first direction X, the width direction of the battery cell 10 is the second direction Y, and the length direction of the battery cell 10 is the third direction Z. The plurality of battery cells 10 may be arranged in a row in the thickness direction thereof, or may be arranged in one or more rows in the width direction, without limitation.

[0036] Each battery cell 10 includes at least one pole ear, and the multiple pole ears correspond to the multiple battery cells 10 one by one, and the multiple pole ears are located on the same side of the multiple battery cells 10. Among them, the multiple pole ears include multiple first pole ears 21 and multiple second pole ears 22, and the polarities of the first pole ears 21 and the second pole ears 22 are opposite, that is, one of them is a positive pole ear and the other is a negative pole ear. Each battery cell 10 corresponds to at least one first pole ear 21 and at least one second pole ear 22, and the multiple first pole ears 21 and the multiple second pole ears 22 are all arranged at one end of the length direction (i.e., the third direction Z) of the multiple battery cells 10.

[0037] The insulating bracket 30 is arranged on one side of the tabs of the multiple battery cells 10. The multiple tabs can be inserted into the insulating bracket 30, or connected to the bracket 30 in any way. The insulating bracket 30 is arranged on one side of the length direction of the multiple battery cells 10, and the insulating bracket 30 is provided with a plurality of through holes 31, and the multiple tabs are inserted into the plurality of through holes 31 one by one. The insulating bracket 30 is made of an insulating material, which can be plastic, bakelite, ceramic, etc., without limitation. The insulating bracket 30 can be roughly plate-shaped, and the shapes of the multiple through holes 31 opened thereon can correspond to the multiple tabs, without limitation.

[0038] The connecting piece 40 is arranged on the insulating bracket 30, and the connecting piece 40 is electrically connected to the pole ear. The connecting piece 40 can be connected to any feasible position of the insulating bracket 30, and can be connected and fixed to the insulating bracket 30 by any feasible method such as snap connection, screw connection, bonding, etc., without limitation. The connecting piece 40 is made of a conductive material, and can be specifically made of copper, aluminum, etc., without limitation. The connecting piece 40 is roughly sheet-shaped, and its specific structure is not limited. The electrical connection between the pole ear and the connecting piece 40 can be a direct connection method such as welding and screw connection, or an indirect connection through a transfer structure, without limitation.

[0039] In the currently used printed circuit board welding method, the circuit on the printed circuit board is formed on a plane by printing, which is small in size and requires high welding precision, resulting in great manufacturing difficulty and high manufacturing cost. Compared with the existing solution, the connecting piece 40 of the embodiment of the utility model is arranged on the insulating bracket 30, which can be insulated from the battery cell 10, and the tab is electrically connected to the connecting piece 40. Compared with welding on a plane, the connecting piece 40 can be connected to the tab in three-dimensional space, so that the connecting piece 40 can be connected in series and parallel with multiple tabs. The connecting piece 40 has a simple structure, is easy to manufacture, and has low cost.

[0040] Therefore, the battery device provided in the embodiment of the utility model realizes series-parallel connection between multiple battery cells 10 by setting an insulating bracket 30 and a connecting plate 40, wherein the connecting plate 40 is set on the insulating bracket 30, and multiple pole ears are electrically connected to the connecting plate 40, thereby significantly reducing the manufacturing difficulty and manufacturing cost compared to the solution of welding with a printed circuit board.

[0041] Optionally, the connecting piece 40 is arranged on the surface of the insulating bracket 30 facing away from the battery cell 10 and close to the inner wall of the through hole 31. In this way, the connecting piece 40 can be insulated from the battery cell 10 by the insulating bracket 30 to avoid contact between the connecting piece 40 and the battery cell 10, which may cause accidental electric shock. The connecting piece 40 can be fixed on the surface of the insulating bracket 30 facing away from the battery cell 10 by snap connection, screw connection, etc. The connecting piece 40 is close to the inner wall of the through hole 31, which means that the connecting piece 40 does not close the through hole 31, but is roughly flush with the inner wall of the through hole 31. Taking the direct welding of the pole tab with the connecting piece 40 as an example, after the pole tab passes through the through hole 31, it can extend to the surface of the connecting piece 40 facing away from the battery cell 10. The welding of the connecting piece 40 and the pole tab in three-dimensional space can simply realize the connection between the pole tab and the connecting piece 40. Compared with the welding of the printed circuit board and the pole tab in a two-dimensional plane, the welding difficulty is significantly reduced.

[0042] Optionally, the connecting piece 40 includes a connecting piece body (not shown) and a connecting portion (not shown), wherein the connecting piece body is disposed on the surface of the insulating support 30 facing away from the battery cell 10; and the connecting portion is penetrated through the through hole 31. In this way, the tab does not need to extend to the surface of the insulating support 30 facing away from the battery cell 10, but can be connected to the tab by extending the connecting portion into the through hole 31, and the connection between the connecting piece 40 and the tab can also be simply achieved.

[0043] Optionally, a plurality of through holes 31 are arranged at intervals from each other, and the first pole tab 21 and the second pole tab 22 of each battery cell 10 are arranged in different through holes 31 .

[0044] Optionally, there are multiple connecting sheets 40, and the first pole tab 21 and the second pole tab 22 of the same battery cell 10 are connected to different connecting sheets 40. Specifically, the same battery cell 10 has a first pole tab 21 and a second pole tab 22, and the first pole tab 21 and the second pole tab 22 are arranged at intervals in the second direction Y. The two through holes 31 corresponding to one battery cell 10 correspond to the first pole tab 21 and the second pole tab 22, respectively, and are also arranged at intervals in the second direction Y. Optionally, the multiple first pole tabs 21 of the multiple battery cells 10 can be arranged at intervals along the first direction X, and the multiple second pole tabs 22 can be arranged at intervals along the first direction X, and the corresponding multiple through holes 31 are also arranged at intervals along the first direction X. Alternatively, the multiple first pole tabs 21 and the multiple second pole tabs 22 of the multiple battery cells 10 can be arranged alternately in the first direction X, or can be arranged randomly, without limitation. The first pole tab 21 and the second pole tab 22 are connected to different connecting sheets 40 , so as to avoid a short circuit between the first pole tab 21 and the second pole tab 22 connected to the same battery cell 10 through the connecting sheet 40 .

[0045] In one embodiment, the plurality of connecting sheets 40 are arranged along the arrangement direction of the plurality of battery cells 10 , and / or the plurality of connecting sheets 40 are arranged along the direction from the first pole tab 21 to the second pole tab 22 of the same battery cell 10 .

[0046] Optionally, the number of first pole tabs 21 and second pole tabs 22 is a, the number of connecting plates 40 connected to a first pole tabs 21 is m, and the number of connecting plates 40 connected to a second pole tabs 22 is n, wherein a, m, and n are all positive integers, and m<a and n<a.

[0047] Among them, since each battery cell 10 is connected to at least one first pole lug 21 and at least one second pole lug 22, multiple battery cells 10 are stacked, and a≥2. When a=2, two battery cells 10 are stacked, and each battery cell 10 is connected to a first pole lug 21 and a second pole lug 22; when a>2, each battery cell 10 may be connected to a first pole lug 21 and a second pole lug 22, and the number of a is equal to the number of stacked battery cells 10, or each battery cell 10 may be connected to more than one first pole lug 21 and / or more than one second pole lug 22, and the number of a is less than the number of battery cells 10, and there is no limitation. For example, when a=4, one battery cell 10 may be connected to two first pole lugs 21 and two second pole lugs 22, and two such battery cells 10 are stacked. The following text is explained by taking an example where a battery cell 10 is connected to a first pole lug 21 and a second pole lug 22 . It should be understood that the embodiments of the utility model are still applicable to a battery cell 10 connected to more than one first pole lug 21 and / or more than one second pole lug 22 .

[0048] When m≥2, m connecting sheets 40 are arranged in sequence in the stacking direction of the battery cells 10; when n≥2, n connecting sheets 40 are arranged in sequence in the stacking direction of the battery cells 10. In this way, the multiple connecting sheets 40 can be electrically connected to the first pole tabs 21 and the second pole tabs 22 of all the battery cells 10 by simple arrangement.

[0049] When there are multiple connecting sheets 40 , in order to realize series-parallel connection of multiple battery cells 10 , the multiple connecting sheets 40 can be connected by structures such as copper busbars, and the specific connection method is not limited.

[0050] Among the multiple connecting pieces 40 , one has a first terminal 43 and another has a second terminal 44 . The first terminal 43 and the second terminal 44 are used to electrically connect to an external electric control module to realize charging of the multiple battery cells 10 or external discharge of the electric energy of the battery cells 10 .

[0051] Optionally, the connecting piece 40 includes a main body 41 and multiple branch parts 42, one end of the multiple branch parts 42 is connected to the main body 41, and the multiple branch parts 42 are arranged at intervals. The multiple branch parts 42 are arranged one by one at the inner wall near the multiple through holes 31, and each branch part 42 is connected to a pole ear.

[0052] The multiple branches 42 can be parallel to each other and connected to the first pole ear 21 or the second pole ear 22 one by one. The main body 41 is connected to the multiple branches 42, so that the multiple branches 42 are connected in series through the main body 41. In this way, the connecting piece 40 can be formed into a shape similar to "E", "F", etc. The multiple branches 42 and the main body 41 can be an integrated structure or a split structure. The connection between the connecting piece 40 and the insulating bracket 30 can be achieved by connecting and fixing the main body 41 to the insulating bracket 30, and connecting and fixing the multiple branches 42 to the main body 41.

[0053] Optionally, the insulating bracket 30 is provided with a receiving groove (not shown), and the structure of the main body 41 and the branch part 42 of the connecting piece 40 can be embedded in the receiving groove to achieve positioning and limiting.

[0054] Optionally, multiple first pole ears 21 are arranged in a row along the arrangement direction of the battery cells 10 (i.e., the first direction X), and multiple second pole ears 22 are arranged in another row along the arrangement direction of the battery cells 10 (i.e., the first direction X). The first pole ears 21 and the second pole ears 22 of the same battery cell 10 are spaced apart in the second direction Y, and the main body 41 extends along the arrangement direction of the multiple battery cells 10 (i.e., the first direction X), and the branch portion 42 extends from the first pole ear 21 to the direction of the second pole ear 22 (i.e., the second direction Y).

[0055] The structure of the trunk portion 41 and the branch portions 42 is simple and convenient for connecting with the plurality of first pole tabs 21 and the plurality of second pole tabs 22 .

[0056] In one embodiment, the battery device further includes a first buffer member 50 , which is disposed at a connection between the battery cell 10 and the tab, and the insulating bracket 30 abuts against the first buffer member 50 .

[0057] Specifically, the first buffer 50 is arranged at the end of the length direction (i.e., the third direction Z) of the battery cell 10, and one first buffer 50 can be shared between two adjacent battery cells 10, that is, the first buffer 50 is arranged between the positions of the connecting pole ears of the two adjacent battery cells 10, that is, the opposite surfaces of the first buffer 50 are in close contact with the pole ears of the two adjacent battery cells 10. The first buffer 50 is an insulating deformable material, which can be specifically a buffer foam, rubber, etc., without limitation. The first buffer 50 can have a certain elastic deformation ability, and can maintain the abutting pressure on the insulating bracket 30 and the battery cell 10 through elastic tension after being squeezed. The length of the first buffer 50 (i.e., the size in the second direction Y) can be equal to the width of the battery cell 10 (the size in the second direction Y), that is, the first pole ear 21 and the second pole ear 22 connected to the same battery cell 10 are in close contact with the same first buffer 50.

[0058] The first buffer member 50 is provided to prevent the insulating support 30 from directly contacting the battery cell 10, which may cause the battery cell 10 to be scratched or crushed. The deformation ability of the first buffer member 50 can absorb the pressure of the insulating support 30. At the same time, the elastic tension of the first buffer member 50 can maintain the pressure of the insulating support 30 on the battery cell 10, thereby ensuring the restraint force of the insulating support 30 on the multiple battery cells 10 in the third direction Z.

[0059] In one embodiment, the battery cell 10 is a soft-pack battery cell 10. The battery device further includes a first side plate 61, a second side plate 62, and a plurality of pull plates 63, wherein the first side plate 61 and the second side plate 62 are respectively arranged on opposite sides of the arrangement direction (i.e., the first direction X) of the plurality of battery cells 10, and the two ends of the plurality of pull plates 63 are respectively connected to the first side plate 61 and the second side plate 62, and the plurality of battery cells 10 are located in a receiving space enclosed by the first side plate 61, the second side plate 62, and the plurality of pull plates 63.

[0060] Compared with the battery cell 10 with a shell, the soft-pack battery cell 10 does not require the step of shelling, which avoids the outer shell of each battery cell 10 occupying space and increasing weight, and is more conducive to improving the energy density of the battery and reducing the equipment quality. The soft-pack battery cell 10 needs to be reasonably restrained to keep the shape and structure of the battery cell 10 stable. In the embodiment of the utility model, the first side plate 61 and the second side plate 62 are arranged on opposite sides of the arrangement direction of the multiple battery cells 10, and then connected to the first side plate 61 and the second side plate 62 through multiple pull plates 63, so as to realize the size constraint of the multiple battery cells 10 in the first direction X and the second direction Y, and ensure that they are constrained to the required size and ensure the shape and structure are stable.

[0061] Among them, at least one pull plate 63 may be respectively provided on both sides of the multiple battery cells 10 opposite to each other in the second direction Y, providing a restraining force on the multiple battery cells 10 in the second direction Y. At least one pull plate 63 is provided on the side of the multiple battery cells 10 opposite to the insulating support 30 in the third direction Z, providing a restraining force on the multiple battery cells 10 in the third direction Z. The insulating support 30 may be connected and fixed to the first side plate 61 and the second side plate 62, so that the insulating support 30 also provides a restraining force in the third direction Z, thereby realizing that the multiple battery cells 10 are restrained in all directions.

[0062] Optionally, the pull plate 63 includes a main plate 631, a first side portion 632, and a second side portion 633. The main plate 631 extends along the first direction X. The first side portion 632 and the second side portion 633 are respectively connected to both ends of the main plate 631 in the first direction X, and protrude from the surface of the main plate 631 facing the receiving space along the second direction Y. The first side portion 632 is connected and fixed to the first side plate 61, and the second side portion 633 is connected and fixed to the second side plate 62. The connection and fixing method can be screwing, riveting, welding, etc., without limitation. The main plate 631, the first side portion 632, and the second side portion 633 can be an integrated structure or a split structure, without limitation.

[0063] Optionally, the battery device further includes a second buffer member 70 , which is disposed on at least one surface of the first side plate 61 , the second side plate 62 , and the plurality of pull plates 63 that faces the receiving space.

[0064] The second buffer member 70 is similar to the first buffer member 50 and may also be a buffer foam, rubber, etc. The second buffer member 70 is provided to prevent the first side plate 61, the second side plate 62 and the plurality of pull plates 63 from scratching or crushing the battery cell 10, and can also ensure the restraint force on the battery cell 10 through elastic tension.

[0065] In one embodiment, the battery device also includes at least one layer plate 64, the first side plate 61 and the second side plate 62 are both provided with a snap-in groove 621, the layer plate 64 has a snap-in protrusion 641, the snap-in protrusion 641 is inserted into the snap-in groove 621 so that the layer plate 64 is snap-fitted and fixed to the first side plate 61 and the second side plate 62, and the layer plate 64 divides the receiving space into multiple sub-spaces, each of which receives multiple battery cells 10.

[0066] The number of the layers 64 can be 1, 2, 3, etc., without limitation. Figure 1 and Figure 2 FIG. 6 shows an embodiment in which the number of the layer plate 64 is 1. At least one layer plate 64 divides the receiving space equally along the second direction Y. Figure 1 and Figure 2One layer plate 64 divides the receiving space into two identical sub-spaces. When there are two layer plates 64, the two layer plates 64 divide the receiving space into three sub-spaces along the second direction Y. And so on, without limitation.

[0067] The multiple battery cells 10 in each subspace form a cluster. By providing at least one layer plate 64, a structure with multiple clusters of battery cells 10 can be realized in a battery device, thereby increasing the number of battery cells 10 and facilitating improving the battery energy density.

[0068] The layer plate 64 is in the shape of a flat plate, and its main body (not shown) is in close contact with the side of the battery cell 10 in the subspace. The clamping part connected to the main body protrudes from the main body along the first direction X and is used to be inserted into the clamping groove 621 provided on the first side plate 61 and the second side plate 62. The number of the clamping groove 621 and the clamping protrusion 641 can be multiple, such as Figure 1 and Figure 2 2 shows an embodiment in which two clamping grooves 621 are provided on the first side plate 61 and the second side plate 62, and there are four clamping protrusions 641. In this way, the clamping protrusions 641 are inserted into the clamping grooves 621 to achieve clamping and fixing of the layer plate 64 to the first side plate 61 and the second side plate 62, which has a simple structure and is easy to install.

[0069] For the embodiment with multiple sub-spaces, an insulating bracket 30 and corresponding connecting pieces 40 , a first buffer member 50 , etc. may be provided for each sub-space, which will not be described in detail.

[0070] Optionally, at least one surface of the plurality of battery cells 10 is provided with a plurality of spaced apart pull plates 63 , and the battery device further comprises an insulating film 80 , which is located in the gaps between the plurality of pull plates 63 and attached to the surfaces of the plurality of battery cells 10 .

[0071] For example, Figure 1 and Figure 2 FIG. 1 shows an embodiment in which two pull plates 63 are provided on two opposite sides of the plurality of battery cells 10 in the second direction Y. Then, an insulating film 80 is provided in the gap between the two pull plates 63 on the two sides to prevent the battery cells 10 from being directly exposed. It can be understood that Figure 1 and Figure 2 A pull plate 63 is provided on the bottom surface of the plurality of battery cells 10 facing away from the insulating support 30 in the third direction Z, and an insulating film 80 is respectively provided on both sides of the pull plate 63 in the second direction Y.

[0072] The reason why the insulating film 80 is provided on parts of the plurality of battery cells 10 instead of the entire surface is that the second buffer member 70 on the pull plate 63 is in close contact with parts of the surfaces of the plurality of battery cells 10, playing a protective and insulating role, so the insulating film 80 only needs to be affixed to the exposed parts.

[0073] The insulating film 80 may be any feasible insulating film 80 , which plays a role in protecting the battery cell 10 .

[0074] The following is an introduction to the assembly process of a battery device according to a specific embodiment of the utility model.

[0075] refer to Figure 1 and Figure 2 , attach the second buffer 70 to the first side plate 61 and the second side plate 62, and make the first side plate 61 and the second side plate 62 face each other in the first direction X; stack the first row of battery cells 10 between the first side plate 61 and the second side plate 62, clamp the layer plate 64 with the first side plate 61 and the second side plate 62, and then stack the second row of battery cells 10 between the first side plate 61 and the second side plate 62; clamp the first side plate 61 and the second side plate 62 with a clamp to clamp the stacked multiple battery cells 10, and the second buffer 70 on the first side plate 61 and the second side plate 62 is in close contact with the battery cells 10; install multiple pull plates 63, and use rivets to fix the pull plates 63 is connected and fixed with the first side plate 61 and the second side plate 62; the insulating film 80 is attached to the exposed part of the battery cell 10 except the surface of the connecting pole ear, that is, in the gap between the two pull plates 63 in the second direction Y and on both sides of a pull plate 63 in the third direction Z; the first buffer 50 is placed on the top surface of the third direction Z of multiple battery cells 10; the insulating bracket 30 passes through multiple pole ears and is placed on the first buffer 50, and the insulating bracket 30 is riveted and fixed with the first side plate 61 and the second side plate 62; multiple connecting plates 40 are placed on the insulating bracket 30; multiple pole ears and multiple connecting plates 40 are welded to complete the assembly. The subsequent connection between multiple connecting plates 40 can be carried out as needed, and the embodiment of the utility model is not limited. The assembled battery device can be flipped to a posture where the layer plate 64 is roughly horizontal for use.

[0076] An embodiment of the utility model further provides an energy storage device, which includes a plurality of energy storage devices, each of which is provided with at least one battery device, the plurality of energy storage devices are arranged along a first direction, the plurality of energy storage devices are electrically connected via plug-in terminals, or the plurality of energy storage devices are electrically connected via wiring harnesses, and the battery device is the battery device of any one of the aforementioned embodiments.

[0077] The specific structure of the energy storage device is not limited, and the first direction can be the vertical direction and / or the horizontal direction, or any other direction. The specific structure of the plug-in terminal and the wiring harness is not limited, and its function is to electrically connect multiple energy storage devices to form an integrated energy storage device.

[0078] Optionally, multiple energy storage devices are electrically connected via a wiring harness, and a gripping member is provided on the side of at least one energy storage device. Optionally, the gripping member includes a gripping portion and a wiring harness arranging portion, the gripping portion is suitable for gripping to move the energy storage device, and the wiring harness arranging portion is suitable for limiting the position of the wiring harness connected between the multiple energy storage devices. The specific structure of the gripping portion and the wiring harness arranging portion is not limited. The wiring harness arranging portion and the gripping portion are integrated into a gripping member. On the basis of realizing the function of gripping to move the energy storage device, the wiring harness can also be limited, so that the wiring harness can be arranged and stored, avoiding the wiring harness being scattered and possibly causing accidents.

[0079] The embodiment of the utility model further provides an electric power system, including an electric power device and a battery device in the embodiment of the utility model, the battery device supplies power to the electric power device. Alternatively, the electric power system includes an electric power device and an energy storage device in the embodiment of the utility model, the energy storage device supplies power to the electric power device. The electric power device can be a household electric load, a commercial electric load, an industrial electric load, an electric vehicle, etc., without limitation.

[0080] The power consumption system of the embodiment of the utility model adopts the battery device or energy storage device in the embodiment of the utility model. The battery device is provided with an insulating bracket 30 and a connecting piece 40. The connecting piece 40 is provided on the insulating bracket 30. A plurality of pole ears are electrically connected to the connecting piece 40 to realize series-parallel connection between a plurality of battery cells 10. Compared with the solution of welding with a printed circuit board, the manufacturing difficulty and manufacturing cost are significantly reduced.

[0081] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship described in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0082] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A battery device, characterized in that: include: A plurality of battery cells, each of the battery cells comprises at least one tab, and the tabs of the plurality of battery cells are located on the same side of the plurality of battery cells; An insulating bracket, arranged on one side of the tabs of the plurality of battery cells; A connecting piece, arranged on the insulating bracket, the connecting piece is electrically connected to the tab; The battery device also includes a first side plate, a second side plate and a plurality of pull plates, wherein the first side plate and the second side plate are respectively arranged on opposite sides of an arrangement direction of the plurality of battery cells, and two ends of the plurality of pull plates are respectively connected to the first side plate and the second side plate, and the plurality of battery cells are located in a receiving space enclosed by the first side plate, the second side plate and the plurality of pull plates.

2. The battery device according to claim 1, characterized in that: The insulating support is provided with a through hole, the tab is passed through the through hole, and the connecting piece is arranged on the surface of the insulating support facing away from the battery core and close to the inner wall of the through hole.

3. The battery device according to claim 1, characterized in that: The insulating bracket is provided with a through hole, and the connecting piece comprises: A connecting piece body, the connecting piece body being arranged on a surface of the insulating bracket facing away from the battery core; and A connecting portion is disposed through the through hole.

4. The battery device according to claim 2, characterized in that: The pole lugs of each of the battery cells include at least a first pole lug and a second pole lug, the first pole lug and the second pole lug have opposite polarities, there are multiple through holes, and the multiple through holes are arranged at intervals from each other, and the first pole lug and the second pole lug of each of the battery cells are arranged in different through holes.

5. The battery device according to claim 4, characterized in that: There are multiple connecting pieces, and the first pole tab and the second pole tab of the same battery cell are connected to different connecting pieces.

6. The battery device according to claim 5, characterized in that: The plurality of connecting sheets are arranged along an arrangement direction of the plurality of battery cells, and / or the plurality of connecting sheets are arranged along a direction from a first pole tab to a second pole tab of the same battery cell.

7. The battery device according to claim 4, characterized in that: The connecting piece comprises: A main body and multiple branch parts, one end of each of the branch parts is connected to the main body, and the multiple branch parts are arranged at intervals. The multiple branch parts are arranged one by one at the inner wall near the multiple through holes, and each branch part is electrically connected to at least one of the pole ears.

8. The battery device according to claim 7, characterized in that: The plurality of first pole ears are arranged in one row along the arrangement direction of the battery cells, the plurality of second pole ears are arranged in another row along the arrangement direction of the battery cells, the first pole ears and the second pole ears of the same battery cell are arranged at intervals, the main body extends along the arrangement direction of the plurality of battery cells, and the branch part extends from the first pole ears to the second pole ears.

9. The battery device according to any one of claims 1 to 8, characterized in that: The battery device further includes a first buffer member, which is disposed at a connection between the battery cell and the tab, and the insulating bracket abuts against the first buffer member.

10. The battery device according to any one of claims 1 to 8, characterized in that: The battery cell is a soft-pack battery cell.

11. The battery device according to claim 10, characterized in that: The battery device also includes at least one layer plate, the first side plate and the second side plate are both provided with a snap-in groove, the layer plate has a snap-in protrusion, the snap-in protrusion is inserted into the snap-in groove so that the layer plate is snap-fitted and fixed to the first side plate and the second side plate, the layer plate divides the receiving space into a plurality of sub-spaces, each of which receives a plurality of the battery cells.

12. The battery device according to claim 10, characterized in that: The battery device further includes a second buffer member disposed on at least one surface of the first side plate, the second side plate, and the plurality of pull plates facing the receiving space.

13. The battery device according to claim 10, characterized in that: At least one surface of the plurality of battery cells is provided with a plurality of spaced pull plates, and the battery device further comprises an insulating film, which is located in the gaps between the plurality of pull plates and attached to the surfaces of the plurality of battery cells.

14. An energy storage device, characterized in that: The energy storage device includes a plurality of energy storage devices, each of which is provided with at least one battery device, the plurality of energy storage devices are arranged along a first direction, the plurality of energy storage devices are electrically connected to each other via plug-in terminals, or the plurality of energy storage devices are electrically connected to each other via wiring harnesses, and the battery device is a battery device as described in any one of claims 1 to 13.

15. The energy storage device according to claim 14, characterized in that: The plurality of energy storage devices are electrically connected through a wiring harness, and a gripping member is provided on the side of at least one of the energy storage devices, and the gripping member comprises: a gripping portion, the gripping portion being adapted to grip to move the energy storage device; and A wire harness arranging portion, wherein the wire harness arranging portion is suitable for limiting the position of the wire harnesses connected between the plurality of energy storage devices.

16. An electricity system, characterized in that: It comprises an electric device and a battery device as claimed in any one of claims 1 to 13, wherein the battery device supplies power to the electric device; or it comprises an electric device and an energy storage device as claimed in claim 14 or 15, wherein the energy storage device supplies power to the electric device.

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