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EP-4742365-A1 - ENERGY STORAGE MODULE AND ELECTRIC APPARATUS

EP4742365A1EP 4742365 A1EP4742365 A1EP 4742365A1EP-4742365-A1

Abstract

An energy-storage module (5) and an electricity-consumption device (1) are discloses in the disclosure. The energy-storage module (5) includes multiple energy-storage apparatuses (100) and a bus bar sheet (500). Each of the multiple energy-storage apparatuses (100) includes an end cover component (10) and a terminal post (20). The bus bar sheet (500) includes multiple bus bar members (60). The multiple bus bar members (60) are stacked in a thickness direction (Z). Each of the multiple bus bar members (60) includes a first connecting portion (610), a heat dissipation portion (620) and a second connecting portion (630) that are sequentially connected in a length direction (X). The first connecting portion (610) and the second connecting portion (630) are respectively connected to terminal posts (20) of two adjacent energy-storage apparatuses (100). Any adjacent two heat dissipation portions (620) of the multiple bus bar members (60) cooperatively define multiple heat dissipation through-holes (6201), thereby improving heat dissipation performance and mechanical buffering performance of the energy-storage module (5).

Inventors

  • LI, MAOSONG
  • TAN, Jiben

Assignees

  • Shenzhen Hithium Energy Storage Technology Co., Ltd.
  • Xiamen Hithium Energy Storage Technology Co., Ltd.

Dates

Publication Date
20260513
Application Date
20230712

Claims (18)

  1. An energy-storage module, comprising: a plurality of energy-storage apparatuses, wherein each of the plurality of energy-storage apparatuses comprises an end cover component and a terminal post passing through the end cover component; and a bus bar sheet, wherein the bus bar sheet comprises a plurality of bus bar members, the plurality of bus bar members are stacked in a thickness direction of the bus bar sheet, each of the plurality of bus bar members comprises a first connecting portion, a heat dissipation portion, and a second connecting portion that are sequentially connected in a length direction of the bus bar sheet, the first connecting portion and the second connecting portion are respectively connected to terminal posts of two adjacent energy-storage apparatuses, and any adjacent two heat dissipation portions of the plurality of bus bar members cooperatively define a plurality of heat dissipation through-holes.
  2. The energy-storage module of claim 1, wherein each of the plurality of bus bar members comprise a first connecting sheet and a second connecting sheet that are stacked, a plurality of first bended protrusions are formed on a side of the heat dissipation portion of the first connecting sheet facing away from the end cover component, a plurality of second bended protrusions are formed on a side of the heat dissipation portion of the second connecting sheet facing towards the end cover component, an extending direction of the plurality of first bended protrusions and an extending direction of the plurality of second bended protrusions are parallel to a width direction of the bus bar sheet, the plurality of first bended protrusions and the plurality of second bended protrusions are disposed opposite to each other in the thickness direction of the bus bar sheet and cooperatively define the plurality of heat dissipation through-holes, and the plurality of heat dissipation through-holes are disposed in the length direction of the bus bar sheet.
  3. The energy-storage module of claim 2, wherein the first connecting sheet is implemented as a plurality of first connecting sheets and the second connecting sheet is implemented as a plurality of second connecting sheets, the plurality of first connecting sheets and the plurality of second connecting sheets are stacked alternately in the thickness direction of the bus bar sheet, and the plurality of second connecting sheets are disposed at a side of the bus bar sheet facing towards the terminal post.
  4. The energy-storage module of claim 3, wherein the plurality of heat dissipation through-holes comprise a plurality of first through-holes and a plurality of second through-holes, a first bended recess is defined between two adjacent first bended protrusions, a second bended recess is defined between two adjacent second bended protrusions, adjacent first bended protrusion and second bended protrusion abut against each other in the thickness direction of the bus bar sheet to define the first through-hole, and adjacent second bended recess and first bended recess abut against each other in the thickness direction of the bus bar sheet to define the second through-hole.
  5. The energy-storage module of any one of claims 1 to 4, wherein a first sheet metal part is disposed at a side of the first connecting portion of each of the plurality of bus bar members in a width direction of the bus bar sheet, and a second sheet metal part is disposed at a side of the second connecting portion of each of the plurality of bus bar members in the width direction of the bus bar sheet; wherein all first sheet metal parts are tightly connected through upsetting to form a first pressed portion, all second sheet metal parts are tightly connected through upsetting to form a second pressed portion, all first connecting portions of the plurality of bus bar members are tightly connected through upsetting to form a first plate body, and all second connecting portions of the plurality of bus bar members are tightly connected through upsetting to form a second plate body; and wherein in the thickness direction of the bus bar sheet, the first pressed portion is bent relative to the first plate body and presses against the first plate body, and the second pressed portion is bent relative to the second plate body and presses against the second plate body.
  6. The energy-storage module of claim 5, wherein a first notch is defined at a position of the first connecting portion of each of the plurality of bus bar members that is opposite to the first sheet metal part, a second notch is defined at a position of the second connecting portion of each of the plurality of bus bar members that is opposite to the second sheet metal part, a shape of the first notch matches a shape of the first sheet metal part, and a shape of the second notch matches a shape of the second sheet metal part.
  7. The energy-storage module of claim 6, wherein in the width direction of the bus bar sheet, the first notch has a first size, the second notch has a second size, and the first connecting portion has a third size, a ratio of the first size to the third size ranges from 0.2 to 0.45, and a ratio of the second size to the third size ranges from 0.2 to 0.45.
  8. The energy-storage module of any one of claims 5 to 7, wherein the first sheet metal part and the second sheet metal part are located on different sides of the energy-storage module in the width direction of the bus bar sheet, and the first sheet metal part and the second sheet metal part are bent towards a same direction.
  9. The energy-storage module of any one of claims 5 to 7, wherein in the length direction of the bus bar sheet, a size of the first sheet metal part gradually decreases from a connection end of the first sheet metal part with the first connecting portion to a free end of the first sheet metal part, and a size of the second sheet metal part gradually decreases from a connection end of the second sheet metal part with the second connecting portion to a free end of the second sheet metal part.
  10. The energy-storage module of any one of claims 1 to 4, wherein all first connecting portions of the plurality of bus bar members are tightly connected through upsetting to form a first plate body, and all second connecting portions of the plurality of bus bar members are tightly connected through upsetting to form a second plate body.
  11. The energy-storage module of claim 10, wherein the terminal post comprises a boss portion and a post portion protruding from the boss portion, the first plate body and the second plate body are respectively provided with a positioning recess, the positioning recess is recessed from a surface of the bus bar sheet facing towards the end cover component in a direction away from the energy-storage apparatus, a continuous through-hole is defined at a bottom wall of the positioning recess, at least part of the boss portion is accommodated in the positioning recess and abuts against the bottom wall of the positioning recess and a side wall of the positioning recess, and the post portion passes through the continuous through-hole.
  12. The energy-storage module of claim 11, wherein the bus bar sheet comprises a first section and a second section, some bus bar members among the plurality of bus bar members form the first section, and a remaining bus bar members among the plurality of bus bar members form the second section, each of the first connecting portion and the second connecting portion of the first section defines a first hole, each of the first connecting portion and the second connecting portion of the second section defines a second hole communicating with the first hole, the first section defines the positioning recess at a position where the first hole is located, and the second section defines the continuous through-hole at a position where the second hole is located.
  13. The energy-storage module of claim 12, wherein a number of the bus bar members in the second section is greater than that in the first section, and a number of the bus bar members in the first section ranges from 1 to 5.
  14. The energy-storage module of any one of claims 11 to 13, wherein a first polarity-marking structure is provided on an exposed end face of the post portion facing away from the boss portion, the continuous through-hole exposes the first polarity-marking structure, the exposed end face and a hole wall of the continuous through-hole define an accommodating recess, and the first polarity-marking structure is disposed at a bottom of the accommodating recess.
  15. The energy-storage module of claim 10, wherein the terminal post comprises an exposed end face protruding from the end cover component, the first plate body and the second plate body respectively abut against the exposed end face, the exposed end face is provided with a first polarity-marking structure; in the thickness direction of the bus bar sheet, the first plate body and the second plate body respectively define a continuous through-hole exposing the first polarity-marking structure, the exposed end face and a hole wall of the continuous through-hole form an accommodating recess, and the first polarity-marking structure is disposed at a bottom of the accommodating recess.
  16. The energy-storage module of claim 14 or 15, wherein the end cover component comprises an end cover, an upper plastic member disposed at the end cover, and an insulating patch both disposed at the end cover, the insulating patch is located between the upper plastic member and the terminal post, and the insulating patch is disposed around a periphery of the terminal post, the insulating patch is provided with a second polarity-marking structure, and/or the upper plastic member is provided with a third polarity-marking structure.
  17. The energy-storage module of claim 16, wherein the second polarity-marking structure and/or the third polarity-marking structure is configured as a hollow structure.
  18. An electricity-consumption device, comprising the energy-storage module of any one of claims 1 to 17, wherein the energy-storage module provides electrical energy for the electricity-consumption device.

Description

TECHNICAL FIELD This disclosure relates to the field of energy-storage technology, and in particular, to an energy-storage module and an electricity-consumption device. BACKGROUND With the increasing development of electrical equipment, higher requirements are raised for the performance of energy-storage batteries that provide power for the electrical equipment. Energy-storage batteries have been widely used for having advantages of high energy density, high operating voltage, and long service life. Regarding existing energy-storage modules, electrical connection of multiple energy-storage apparatuses is implemented. A mylar film that insulates an electrode component from a housing is provided inside the energy-storage apparatus, and an insulating film is wrapped around an exterior of the electrode component. Since these two insulating structures, the mylar film and the insulating film, are functioning for heat insulation, most of the heat generated by the electrode component of the energy-storage apparatus during electrochemical reactions is conducted and dissipated through metal structures such as tabs, connector, terminal posts, and energy-storage modules. However, the existing energy-storage modules have low heat dissipation efficiency, which easily causes thermal runaway of the energy-storage modules and degrades the safety performance of the energy-storage modules. SUMMARY In view of the above, the disclosure intends to provide an energy-storage module and an electricity-consumption device, so as to solve the technical problem of low heat dissipation efficiency of the energy-storage module in prior art. In a first aspect, an energy-storage module is provided in the disclosure. The energy-storage module includes multiple energy-storage apparatuses and a bus bar sheet. Each of the multiple energy-storage apparatuses includes an end cover component and a terminal post passing through the end cover component. The bus bar sheet includes multiple bus bar members. The multiple bus bar members are stacked in a thickness direction of the bus bar sheet. Each of the multiple bus bar members includes a first connecting portion, a heat dissipation portion, and a second connecting portion that are sequentially connected in a length direction of the bus bar sheet. The first connecting portion and the second connecting portion are respectively connected to terminal posts of two adjacent energy-storage apparatuses. Any adjacent two heat dissipation portions of the multiple bus bar members cooperatively define multiple heat dissipation through-holes. In the disclosure, by disposing any adjacent two heat dissipation portions in the multiple bus bar members to cooperatively define multiple heat dissipation through-holes, a heat dissipation area of the heat dissipation portion is expanded, enabling the heat dissipation portion of the bus bar sheet to quickly carry away and dissipate the heat generated by the energy-storage apparatus, thereby improving heat dissipation performance of the energy-storage module. The bus bar sheet is avoided from degradation in strength caused by experiencing long-term high temperature, which may lead to failure of connection between the bus bar sheet and the terminal post caused if there be accidental vibration or shaking, and safety performance and service life of the energy-storage module can be improved. On the other hand, by providing heat dissipation through-hole, mechanical buffering performance of the bus bar sheet can be improved at the heat dissipation portion. Furthermore, the bus bar sheet made of metal can be prevented from increasing in resistance caused by continuous high temperature, thereby improving efficiency of electric energy conduction. With reference to the first aspect, in some implementations of the first aspect, each of the multiple bus bar members includes a first connecting sheet and a second connecting sheet that are stacked. Multiple first bended protrusions are formed on a side of the heat dissipation portion of the first connecting sheet facing away from the end cover component. Multiple second bended protrusions are formed on a side of the heat dissipation portion of the second connecting sheet facing towards the end cover component. An extending direction of the multiple first bended protrusions and an extending direction of the multiple second bended protrusions are parallel to a width direction of the bus bar sheet. The first bended protrusion and the second bended protrusion are disposed opposite to each other in the thickness direction of the bus bar sheet and cooperatively define the heat dissipation through-hole. The multiple heat dissipation through-holes are disposed in the length direction of the bus bar sheet. Therefore, by disposing the first bended protrusion and the second bended protrusion which bend towards opposite directions, on the one hand, multiple heat dissipation portions are prevented from being pressed against and adhering to each othe