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EP-4191765-B1 - BATTERY UNIT COMPRISING A BRACKET WITH BRACKET BODIES AND ENERGY STORAGE POWER SUPPLY WITH THE BATTERY UNIT

EP4191765B1EP 4191765 B1EP4191765 B1EP 4191765B1EP-4191765-B1

Inventors

  • QIN, Geng
  • MA, HUI
  • GUO, HUISHENG

Dates

Publication Date
20260506
Application Date
20220407

Claims (7)

  1. A battery unit (10), comprising: a bracket (100), comprising a first bracket body (130) and a second bracket body (140), wherein the first bracket body (130) is provided with a first clamping part (132), the second bracket body (140) is provided with a second clamping part (142), the second bracket body (140) rotates relative to the first bracket body (130) in a mirroring mode in a height direction of the battery unit (10), and, the first bracket body (130) and the second bracket body (140) are clamped by the first clamping part (132) and the second clamping part (142); wherein the first bracket body (130) and the second bracket body (140) are combined together to form a base shell (110), the base shell (110) being provided with a receiving groove (111) for receiving a battery cell, the receiving groove (111) running through a first surface (112) and a second surface (113) of the base shell (110), and the first surface (112) and the second surface (113) being two opposite surfaces of the base shell (110); and wherein the bracket (100) is further provided with a stopper (120), the stopper (120) comprising a connecting part (121) and a resisting part (122), the connecting part (121) being fixed to the first surface (112) of the base shell (110) and avoiding the receiving groove (111), the resisting part (122) being connected to the connecting part (121), and the resisting part (122) corresponding to the receiving groove (111) and covering part of an edge of the receiving groove (111); wherein the resisting part (122) is higher than the first surface (112) of the base shell (110) and forms a gap with the first surface (112); a battery cell installed in the receiving groove (111), the resisting part (122) abutting against part of an edge of the battery cell, and a conductive sheet (300), comprising a positioning hole (302) adapted to the stopper (120), wherein the conductive sheet (300) is fixed to the first surface (112) of the base shell (110) through the positioning hole (302), and is electrically connected to an electrode of the battery cell, and the battery unit (10) comprises a plurality of battery cells, which are divided into two battery cell groups (200), the battery cells in each battery cell group (200) face the same direction, and the battery cells of the two battery cell groups (200) face opposite directions.
  2. The battery unit (10) according to claim 1, characterized in that the base shell (110) is provided with a plurality of receiving grooves (111) which are arranged in a matrix or honeycomb pattern.
  3. The battery unit (10) according to claim 2, characterized in that the stopper (120) comprises a connecting part (121) and at least one resisting part (122), and each of the at least one resisting part (122) corresponds to and covers part of an edge of one receiving groove (111).
  4. The battery unit (10) according to claim 1, characterized in that a height of the gap is 0.3-0.8 mm.
  5. The battery unit (10) according to claim 1, characterized in that the stopper (120) is L-shaped or T-shaped.
  6. An energy storage power supply (1), characterized by comprising: a plurality of battery units (10) according to any one of claims 1-5, the plurality of battery units (10) being stacked in a direction perpendicular to the first surface (112) and the second surface (113) to form a battery unit module (10a); and a positive electrode bus structure (30) and a negative electrode bus structure (40) which are respectively connected to a total positive electrode and a total negative electrode of the battery unit module (10a).
  7. The energy storage power supply (1) according to claim 6, characterized by comprising: the plurality of battery unit modules (10a), wherein the plurality of battery unit modules (10a) are arranged in a direction parallel to the first surface (112) and the second surface (113) and are electrically connected through the positive electrode bus structure (30) and/or the negative electrode bus structure (40).

Description

Technical Field The invention relates to the technical field of energy storage power supplies, in particular to a battery unit comprising a bracket with bracket bodies and an energy storage power supply with the battery unit. Background of the Invention A battery refers to a cup, tank, or other containers or part of the space of a composite container containing an electrolyte solution and metal electrodes to generate electric currents, which can convert chemical energy into electric energy and has a positive electrode and a negative electrode. To meet the power demand of a power battery system of an electric vehicle or an energy storage battery system of State Grid Corporation of China, it is necessary to connect multiple single batteries in series and parallel, and then connect these battery units in series and parallel to reach a certain voltage level and capacity level to meet people's needs. At present, battery units are mostly obtained by assembling battery packs (assembled batteries, with battery units inside) with main control boxes, and a stackable installation mode is adopted most of the time. Battery packs are also known from US2014193684A1, JPS519221U and US2020343497A1. According to a traditional battery unit, a battery cell group is fixed to a bracket, and then a conductive sheet is welded to two ends of a battery cell exposed from the bracket, so as to realize electrical connection between multiple battery cells. In the process of implementing the embodiment, the inventor found that for the bracket of the traditional battery unit, an end of a receiving groove for receiving the battery cell extends to a middle to form a shielding part, thus preventing the battery cell from coming off the bracket when being installed in the receiving groove, but the shielding part is designed so that an electrode center of the battery cell is lower than an end face of the bracket, resulting in a distance between the battery cell and the conductive sheet, which is not conducive to the welding between the conductive sheet and the battery cell. Even if the conductive sheet and the battery cell are welded, false soldering occurs easily, thus affecting the electrical connection between the battery cells and the normal use of the battery unit. Summary of the Invention The invention provides a battery unit as defined in claim 1 and an energy storage power supply as defined in claim 6, so as to solve the technical problem that a conductive sheet and a battery cell are hard to weld when a battery cell is fixed through a shielding part for an existing bracket. In order to solve the above technical problem, the technical scheme adopted in this invention is as follows. A battery unit, comprising: a bracket, comprising a first bracket body and a second bracket body, wherein the first bracket body is provided with a first clamping part, the second bracket body is provided with a second clamping part, the second bracket body rotates relative to the first bracket body in a mirroring mode in a height direction of the battery unit, and, the first bracket body and the second bracket body are clamped by the first clamping part and the second clamping part ; wherein the first bracket body and the second bracket body are combined together to form a base shell, the base shell being provided with a receiving groove for receiving a battery cell, the receiving groove running through a first surface and a second surface of the base shell, and the first surface and the second surface being two opposite surfaces of the base shell; and wherein the bracket is further provided with a stopper, the stopper comprising a connecting part and a resisting part, the connecting part being fixed to the first surface of the base shell and avoiding the receiving groove, the resisting part being connected to the connecting part, and the resisting part corresponding to the receiving groove and covering part of an edge of the receiving groove; wherein the resisting part is higher than the first surface of the base shell and forms a gap with the first surface;a battery cell installed in the receiving groove, the resisting part abutting against part of an edge of the battery cell, anda conductive sheet, comprising a positioning hole adapted to the stopper, wherein the conductive sheet is fixed to the first surface of the base shell through the positioning hole, and is electrically connected to an electrode of the battery cell;wherein the battery unit comprises a plurality of battery cells, which are divided into two battery cell groups, the battery cells in each battery cell group face the same direction, and the battery cells of the two battery cell groups face opposite directions.Optionally, the base shell is provided with a plurality of receiving grooves which are arranged in a matrix or honeycomb pattern. Optionally, the stopper comprises a connecting part and at least one resisting part, and each of the at least one resisting part corresponds to and cover