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EP-4742360-A1 - BATTERY PACK AND ENERGY STORAGE BOX

EP4742360A1EP 4742360 A1EP4742360 A1EP 4742360A1EP-4742360-A1

Abstract

The present disclosure relates to a battery pack and an energy storage box, belonging to the field of energy storage technologies. The battery pack includes a battery module, a connector, and a first output terminal base assembly. The battery module includes end plates, an electrical connection bar, and a plurality of battery cells. The plurality of battery cells are located between the end plates, and the electrical connection bar is electrically connected to the plurality of battery cells. The connector is electrically connected to the electrical connection bar. The first output terminal base assembly includes a first body for fixing the connector and a second body for fixing the electrical connection bar. The first body includes a board body and at least two first partitions arranged at intervals. The at least two first partitions each protrude relative to the board body along a length direction of the battery pack, and at least one cavity is formed between the board body and the at least two first partitions. When an electrical fault occurs in the battery pack, by means of the at least one cavity enclosed between the board body and the first partitions, the current can flow around the cavity. That is, the current needs to cross over the first partitions in order to flow towards the charged metal components, thereby increasing the creepage distance and being beneficial to improving the electrical safety performance of the battery pack.

Inventors

  • SHI, Yanyan
  • CHEN, Yuanhang

Assignees

  • Zhejiang Jinko Energy Storage Co., Ltd.

Dates

Publication Date
20260513
Application Date
20250225

Claims (15)

  1. A battery pack (1), characterized in that , comprising: a battery module (11), comprising end plates (111), an electrical connection bar (112), and a plurality of battery cells that are located between the end plates (111) and electrically connected to the electrical connection bar (112); a connector (114) electrically connected to the electrical connection bar (112); and a first output terminal base assembly (2), comprising a first body (21) for fixing the connector (114) and a second body (22) for fixing the electrical connection bar (112), wherein the first body (21) comprises a board body (211) and at least two first partitions (212) arranged at intervals, the at least two first partitions (212) protrude relative to the board body (211) along a length direction (X) of the battery pack (1), and at least one cavity is formed between the board body (211) and the at least two first partitions (212).
  2. The battery pack (1) according to claim 1, characterized in that , the end plate (111) is made of a metal material, and the first output terminal base assembly (2) is made of an insulating material.
  3. The battery pack (1) according to claim 1, characterized in that , the first body (21) further comprises at least two second partitions (213) arranged at intervals, and the at least two second partitions (213) connect adjacent first partitions (212); along the length direction (X) of the battery pack (1), a first distance L from a surface of the second partition (213) to a surface of the first partition (212) satisfies 5mm≤L≤10mm; and the first partition (212) is perpendicular to a height direction (Z) of the battery pack (1).
  4. The battery pack (1) according to claim 3, characterized in that , the first partitions (212) each are perpendicular to the height direction (Z) of the battery pack (1), and the second partitions (213) each are parallel to the height direction (Z) of the battery pack (1), in such a manner that the first partitions (212) and the second partitions (213) form a square grid-like structure.
  5. The battery pack (1) according to claim 3, characterized in that , a top of the first body (21) is provided with the second partition (213) and a third partition (214) that is arranged parallel to the height direction (Z) of the battery pack (1).
  6. The battery pack (1) according to claim 5, characterized in that , the second partition (213) at the top of the first body (21) is configured to connect at least two third partitions (214) along the length direction (X) of the battery pack 1, in such a manner that the top wall of the first body (21) is approximately formed as a grid-like structure.
  7. The battery pack (1) according to claim 1, characterized in that , further comprising a printed circuit board (115) fixedly connected to the connector (114), the first body (21) comprises a fixing member (215), the printed circuit board (115) is provided with a fixing hole (1151), and the fixing member (215) is capable of extending into the fixing hole (1151) to cause the first body (21) to be relatively fixed to the connector (114); and the fixing member (215) is a protruding post extending along a height direction (Z) of the battery pack (1), and the printed circuit board (115) and the first body (21) are riveted by the fixing member (215), or the fixing member (215) is a screw, the printed circuit board (115) and the first body (21) are thread-connected by the fixing member (215), the first body (21) has an avoidance space (216), and the screw is capable of extending into the avoidance space (216).
  8. The battery pack (1) according to claim 1, characterized in that , the end plate (111) comprises an avoidance portion (1111) recessed downward along a height direction (Z) of the battery pack (1), the avoidance portion (1111) is provided therein with a limit-mating groove (1111a), the first body (21) further comprises a mating portion (217), the first body (21) is installed at the avoidance portion (1111), the mating portion (217) is located at the limit-mating groove (1111a), and a bottom wall of the limit-mating groove (1111a) along the length direction (X) of the battery pack (1) is configured to prevent the mating portion (217) from separating from the limit-mating groove (1111a).
  9. The battery pack (1) according to claim 8, characterized in that , the limit-mating groove (1111a) is located in the avoidance portion (1111), in such a manner that a surface of the first body (21) is flush with a surface of the end plate (111) along the length direction (X) of the battery pack (1).
  10. The battery pack (1) according to claim 1, characterized in that , the end plate (111) further comprises a snap-fit hole (1112), the first body (21) further comprises a first snap (218), the first snap (218) is in snap-fit connection with the snap-fit hole (1112), an inner wall of the snap-fit hole (1112) comprises a first inclined surface (1112a), the first snap (218) comprises a second inclined surface (2181), and during a process of the first snap (218) being in snap-fit connection with the snap-fit hole (1112), the first inclined surface (1112a) is in sliding fit with the second inclined surface (2181).
  11. The battery pack (1) according to any one of claims 1 to 10, characterized in that , the second body (22) comprises a mounting seat (224) for fixing the electrical connection bar (112), the first output terminal base assembly (2) further comprises a protective cover (23), the protective cover (23) is detachably connected to the second body (22), and along a height direction (Z) of the battery pack (1), a safety gap H is formed between the protective cover (23) and the second body (22); the protective cover (23) at least comprises a second snap (232) and a third snap (2341), the second body (22) comprises a first barrier wall (221) along a width direction (Y) of the battery pack (1) and a second barrier wall (222) along the length direction (X) of the battery pack (1), the first barrier wall (221) is provided with a first snap-groove (2211), the second barrier wall (222) is provided with a second snap-groove (2221), the first snap-groove (2211) is in snap-fit connection with the second snap (232), and the second snap-groove (2221) is in snap-fit connection with the third snap (2341); and the second snap (232) is capable of moving relative to the second body (22) or elastically deforming to allow the protective cover (23) to be disconnected from the second body (22).
  12. The battery pack (1) according to claim 11, characterized in that , the protective cover (23) further comprises: a first limit wall (231) and a second limit wall (233) that are arranged at intervals along the width direction (Y) of the battery pack (1), and a third limit wall (234) arranged along the length direction (X) of the battery pack (1); and the second body (22) further comprises a third barrier wall (225) arranged along the width direction (Y) of the battery pack (1); and the third snap (2341) is provided at the third limit wall (234), the first limit wall (231) and the second snap (232) are located at two sides of the first barrier wall (221), and the first limit wall (231) abuts against the first barrier wall (221), the second limit wall (233) abuts against the third barrier wall (225), and each of the first limit wall (231) and the second limit wall (233) abuts against the second barrier wall (222).
  13. The battery pack (1) according to claim 11, characterized in that , the first output terminal base assembly (2) further comprises a fastening pin (24), the protective cover (23) comprises a first through-hole (235), the second body (22) comprises a second through-hole (223), and the fastening pin (24) passes through the first through-hole (235) and the second through-hole (223) to allow the protective cover (23) to be detachably connected to the second body (22).
  14. The battery pack (1) according to claim 11, characterized in that , the second snap (232) protrudes along the width direction (Y) of the battery pack (1), and the third snap (2341) protrudes along the length direction (X) of the battery pack (1), in such a manner that the second snap (232) and the third snap (2341) are asymmetrically arranged at the protective cover (23).
  15. The battery pack (1) according to any one of claims 1 to 14, characterized in that , the battery pack (1) further comprises at least one second output terminal base assembly (3), the second output terminal base assembly (3) comprises the first body (21); the first body (21) and the second body (22) of the first output terminal base assembly (2) are formed as an integral structure, or the first output terminal base assembly (2) comprises a mounting board (25) and at least two first bodies (21), and along a width direction (Y) of the battery pack (1), adjacent first bodies (21) are connected to each other by the mounting board (25); and the at least two first bodies (21), the second body (22) and the mounting board (25) are formed as an integral structure.

Description

TECHNICAL FIELD The present disclosure relates to the field of energy storage technologies, specifically to a battery pack and an energy storage box. BACKGROUND At present, a battery pack generally includes a low-voltage connector and an output electrical connection bar. The low-voltage connector is mainly used to ensure communication and power transmission between the battery management system (BMS) and other electronic control units. The output electrical connection bar is mainly used to transmit power from the battery pack to the motor controller or other high-voltage electrical devices. The low-voltage connector and the output electrical connection bar are fixed to an end plate of the battery pack through a fixing base. SUMMARY The present disclosure provides a battery pack and an energy-storage box. In a first aspect, the present disclosure provides a battery pack. The battery pack includes a battery module, a connector, and a first output terminal base assembly. The battery module includes end plates, an electrical connection bar, and a plurality of battery cells that are located between the end plates and electrically connected to the electrical connection bar. The connector is electrically connected to the electrical connection bar. The first output terminal base assembly includes a first body for fixing the connector and a second body for fixing the electrical connection bar. The first body includes a board body and at least two first partitions arranged at intervals. The at least two first partitions protrude relative to the board body along a length direction of the battery pack, and at least one cavity is formed between the board body and the at least two first partitions. When an electrical fault occurs in the battery pack, by means of the at least one cavity enclosed between the board body and the first partitions, the current can flow around the cavity. That is, the current has to cross over the first partitions in order to flow towards the charged metal components. As a result, the creepage distance can be increased, thereby preventing the creepage current between two charged metal components from flowing along a straight-line path. This reduces a risk of creepage occurring between the connector and metal components such as the end plate, thereby reducing a risk of potential safety hazards, and thus being beneficial to improving the electrical safety performance of the battery pack and ensuring the use safety of the battery pack. In one or more embodiments, the first body further includes at least two second partitions arranged at intervals. The at least two second partitions connect adjacent first partitions. Along the length direction of the battery pack, a first distance L from a surface of the second partition to a surface of the first partition satisfies 5mm≤L≤10mm. The first partition is perpendicular to a height direction of the battery pack. In one or more embodiments, a top of the first body is provided with the second partition and a third partition that is arranged parallel to the height direction of the battery pack. In one or more embodiments, the battery pack further includes a printed circuit board fixedly connected to the connector. The first body includes a fixing member. The printed circuit board is provided with a fixing hole, and the fixing member is capable of extending into the fixing hole to cause the first body to be relatively fixed to the connector. The fixing member is a protruding post extending along a height direction of the battery pack, and the printed circuit board and the first body are riveted by the fixing member. Alternatively, the fixing member is a screw, and the printed circuit board and the first body are thread-connected by the fixing member, the first body has an avoidance space, and the screw is capable of extending into the avoidance space. In one or more embodiments, the end plate includes an avoidance portion recessed downward along a height direction of the battery pack, and a limit-mating groove is provided at the avoidance portion. The first body further includes a mating portion, the first body is installed at the avoidance portion, the mating portion is located at the limit-mating groove, and a bottom wall of the limit-mating groove along the length direction of the battery pack is used to prevent the mating portion from separating from the limit-mating groove. In one or more embodiments, the end plate further includes a snap-fit hole. The first body further includes a first snap. The first snap is in snap-fit connection with the snap-fit hole. An inner wall of the snap-fit hole includes a first inclined surface, and the first snap includes a second inclined surface. During a process of the first snap being in snap-fit connection with the snap-fit hole, the first inclined surface is in sliding fit with the second inclined surface. In one or more embodiments, the second body includes a mounting seat for fixing the electrical connection bar.