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CN-224232849-U - Energy storage device

CN224232849UCN 224232849 UCN224232849 UCN 224232849UCN-224232849-U

Abstract

The application provides an energy storage device which comprises a box body, a connecting plate and a battery cluster, wherein an accommodating cavity is formed in the box body, the connecting plate is arranged in the accommodating cavity and divides the accommodating cavity into a first subchamber and a second subchamber, the connecting plate comprises a plate body, an output terminal, a conductive piece and an input terminal, the conductive piece is at least partially arranged in the plate body, a plurality of input terminals are respectively arranged on the surface of the plate body, the conductive piece is respectively electrically connected with the plurality of input terminals and the output terminals, the battery cluster comprises at least two battery modules, each battery module comprises a bag body, a battery core and a plug terminal, the plurality of battery cores are arranged in the bag body, the plug terminal is arranged on the surface of the bag body and is electrically connected with the battery core, at least one battery module is arranged in the first subchamber and is electrically connected with the input terminal, at least one other battery module is arranged in the second subchamber and is electrically connected with the plug terminal, and the battery clusters are stacked in the accommodating cavity along the height direction of the box body.

Inventors

  • ZHANG GUISEN
  • ZHANG ZHIGUO
  • WU DI
  • FU JIAXING
  • ZENG ZHIJIE

Assignees

  • 珠海冠宇动力电池有限公司

Dates

Publication Date
20260512
Application Date
20250331

Claims (10)

  1. 1. An energy storage device, comprising: the box body (10) is internally provided with a containing cavity (11); The connecting plate (20) is positioned in the accommodating cavity (11), the accommodating cavity (11) is divided into a first subchamber (111) and a second subchamber (112) by the connecting plate (20), the connecting plate (20) comprises a plate body (21), an output terminal (22), a conductive piece (23) and an input terminal (24), the conductive piece (23) is at least partially positioned in the plate body (21), a plurality of input terminals (24) are respectively arranged on the surface of the plate body (21), and the conductive piece (23) is respectively electrically connected with a plurality of input terminals (24) and the output terminal (22); The battery cluster (30) comprises at least two battery modules (31), wherein each battery module (31) comprises a bag body (311), an electric core (312) and plug terminals (313), a plurality of electric cores (312) are positioned in the bag body (311), the plug terminals (313) are arranged on the surface of the bag body (311) and are electrically connected with the electric cores (312), at least one battery module (31) is positioned in the first subcavity (111), the plug terminals (313) of the battery modules (31) are electrically connected with the input terminals (24), at least one other battery module (31) is positioned in the second subcavity (112), and the plug terminals (313) of the battery modules (31) are electrically connected with the input terminals (24); along the height direction of the box body (10), a plurality of battery clusters (30) are stacked and arranged in the accommodating cavity (11).
  2. 2. The energy storage device according to claim 1, wherein the battery cluster (30) comprises at least three of the battery modules (31); Each battery module (31) comprises two plug terminals (313), wherein one plug terminal (313) is a first positive terminal (3131), and the other plug terminal (313) is a first negative terminal (3132); The input terminal (24) comprises a second positive terminal (241) and a second negative terminal (242), the conductive member (23) comprises a plurality of conductive rows, each conductive row is electrically connected with any one of the second negative terminals (242) and any one of the second positive terminals (241), each first positive terminal (3131) is electrically connected with any one of the second positive terminals (241), and each first negative terminal (3132) is electrically connected with any one of the second negative terminals (242); The first positive electrode terminal (3131) of each battery module (31) is electrically connected with the first negative electrode terminal (3132) of another battery module (31), and a plurality of battery modules (31) are sequentially connected in series.
  3. 3. The energy storage device according to claim 2, wherein in the same battery cluster (30), in the orthographic projection of the height direction of the case (10), a plurality of the battery modules (31) are not overlapped with each other, and the thickness of any two of the battery modules (31) has at least a partially overlapped region in the height direction of the case (10), or, In the same battery cluster (30), at least two battery modules (31) are at least partially overlapped in the orthographic projection of the height direction of the box body (10).
  4. 4. Energy storage device according to claim 1, characterized in that one of the plug-in terminals (313) and the input terminals (24) electrically connected to each other is a hole-provided end, the other is a plug end; The plug end is provided with an electric connecting plug corresponding to the electric connecting hole, a limit plug corresponding to the limit hole is arranged, the limit plug is configured to protrude relative to the electric connecting plug, the top end is provided with a guide surface, and the guide surface is configured to be a conical surface or a round table surface which is reduced towards one side of the top end.
  5. 5. Energy storage device according to claim 1, characterized in that the plug-in terminal (313) is movably arranged on the bag body (311) and/or that the output terminal (22) and the input terminal (24) are movably arranged on the connection plate (20).
  6. 6. Energy storage device according to claim 1, characterized in that the projection of the plate (21) on the vertical plane thereof covers each of the battery clusters (30); The edges of the horizontal ends and the edges of the upper ends and the lower ends of the plate body (21) are fixedly connected with the side wall of the box body (10), and/or, The first subchamber (111) and the second subchamber (112) are closed chambers.
  7. 7. The energy storage device according to any one of claims 1 to 6, wherein the battery module (31) comprises at least four cells (312) located within the bag body (311), the cells (312) having a length direction and a width direction, each of the cells (312) being configured to be arranged in parallel in the width direction, and comprising edge cells (3122) located at both ends in the width direction and a middle cell (3121) located between the two edge cells (3122); The middle battery cells (3121) protrude towards one side of the length direction relative to the two edge battery cells (3122), two edge mounting cavities (3141) are respectively formed by surrounding the bag body (311), the long side of the middle battery cell (3121) and the short side of the edge battery cell (3122), and the plug-in terminal (313) is at least partially positioned in the edge mounting cavities (3141).
  8. 8. The energy storage device of claim 7, wherein a central mounting cavity (3142) is defined between the bag body (311), the short sides of the central cell (3121) and the long sides of the edge cells (3122); The bag body (311) is provided with a first explosion-proof valve (3151) and a second explosion-proof valve (3152), the first explosion-proof valve (3151) is arranged on the bag body (311) which encloses the edge mounting cavity (3141), and the second explosion-proof valve (3152) is arranged on the bag body (311) which encloses the middle mounting cavity (3142).
  9. 9. The energy storage device of claim 8, wherein the battery module (31) further comprises a battery management unit (316), the battery management unit (316) being disposed within the mid-mount cavity (3142).
  10. 10. The energy storage device according to any one of claims 1 to 6, wherein the enclosure (311) includes a frame (3111) located around the longitudinal and width directions of the cells (312) and a heat dissipation plate (3112) attached to the bottom surface of the cells (312), the energy storage device further including a cooling device configured to cool each of the cells (312) through the heat dissipation plate (3112); The bag body (311) further comprises a reinforcing plate (3113) which is positioned in the middle of the bag body (311) and extends along the length direction of the battery cell (312), and two ends of the reinforcing plate (3113) are fixedly connected with the frame body (3111).

Description

Energy storage device Technical Field The application relates to the field of energy storage equipment, in particular to an energy storage device. Background The energy storage container is one of the energy storage devices, has the characteristics of convenience in installation and transportation, high integration level, small occupied area and good expansibility, and is an important component for the development of distributed energy, smart power grids and energy Internet in the energy storage field. In the energy storage device, a case for accommodating the battery modules is generally provided, and in order to supply electric power to the outside, it is necessary to provide an electrical connector for electrically connecting each battery module with external devices. But adopt the connection pencil to realize the electricity between the battery module more in the current energy memory to connect, overall structure is more complicated to connect the pencil and need certain setting space, arrange comparatively loaded down with trivial details can not satisfy the user demand well. Disclosure of utility model In view of the above, the embodiments of the present application are directed to providing an energy storage device, so as to solve the problems that in the existing energy storage device, a connection harness is mostly used to realize electrical connection between battery modules, the overall structure is complex, and the connection harness needs a certain installation space and is complicated to arrange. In one aspect, the present application provides an energy storage device comprising: The box body is internally provided with a containing cavity; the connecting plate is positioned in the accommodating cavity and divides the accommodating cavity into a first subchamber and a second subchamber, the connecting plate comprises a plate body, an output terminal, a conductive piece and an input terminal, the conductive piece is at least partially positioned in the plate body, a plurality of input terminals are respectively arranged on the surface of the plate body, and the conductive piece is respectively electrically connected with the input terminals and the output terminals; The battery cluster comprises at least two battery modules, at least one battery module and at least one battery module, wherein the battery modules comprise a bag body, electric cores and plug terminals, the electric cores are positioned in the bag body, the plug terminals are arranged on the surface of the bag body and are electrically connected with the electric cores; Along the height direction of the box body, a plurality of battery clusters are stacked and arranged in the accommodating cavity. In one embodiment of the present application, the battery cluster includes at least three of the battery modules; Each battery module comprises two plug terminals, wherein one plug terminal is a first positive terminal, and the other plug terminal is a first negative terminal; The input terminal comprises a second positive electrode terminal and a second negative electrode terminal, the conductive piece comprises a plurality of conductive rows, each conductive row is electrically connected with any one of the second negative electrode terminals and any one of the second positive electrode terminals, each first positive electrode terminal is electrically connected with any one of the second positive electrode terminals, and each first negative electrode terminal is electrically connected with any one of the second negative electrode terminals; The first positive terminal of each battery module is electrically connected with the first negative terminal of another battery module, and a plurality of battery modules are sequentially connected in series. In one embodiment of the present application, in the same battery cluster, in the front projection of the height direction of the case, a plurality of the battery modules are not overlapped with each other, and the thickness of any two of the battery modules has at least a partially overlapped region in the height direction of the case, or, In the same battery cluster, at least two battery modules are at least partially overlapped in the orthographic projection of the height direction of the box body. In one embodiment of the present application, one of the plug terminal and the input terminal electrically connected to each other is a hole end, and the other is a plug end; The plug end is provided with an electric connecting plug corresponding to the electric connecting hole, a limit plug corresponding to the limit hole is arranged, the limit plug is configured to protrude relative to the electric connecting plug, the top end is provided with a guide surface, and the guide surface is configured to be a conical surface or a round table surface which is reduced towards one side of the top end. In one embodiment of the application, the plug-in terminal is movably arranged on the bag body, and/or