CN219163580U

CN219163580U - Battery pack structure and power supply device

Info

Publication number: CN219163580U
Application number: CN202223377193.1U
Authority: CN
Inventors: 余翔; 余建华; 韦启旺; 涂仲华
Original assignee: Huizhou Saiwang Electronics Co ltd
Current assignee: Huizhou Saiwang Electronics Co ltd
Priority date: 2022-12-13
Filing date: 2022-12-13
Publication date: 2023-06-09
Anticipated expiration: 2032-12-13

Abstract

The utility model discloses a battery pack structure, which comprises a shell, wherein an electric core group is arranged in the shell, the shell comprises a shell body and a cover body, and the cover body is connected with the shell body through threads. In the battery pack structure provided by the utility model, the shell comprises the shell body and the cover body, and the shell body and the cover body adopt the threaded connection structure, so that the design of holes, grooves and the like is avoided on the shell, the condition that water vapor enters the shell from the holes, grooves and the like is avoided, the sealing performance in the shell is better, the waterproof requirement of IP67 can be met, and the safety of the battery pack is improved.

Description

Battery pack structure and power supply device

Technical Field

The utility model relates to the technical field of battery modules, in particular to a battery pack structure and a power supply device.

Background

The lithium battery pack is applied to various environments, the severe environment is not spent, the waterproof structure is designed to be indispensable, the existing lithium battery pack is provided with a protective shell, the battery pack shell is mainly used for protecting the internal lithium battery pack, the lithium battery pack is prevented from being damaged, normal use of the lithium battery is guaranteed, the battery pack shell is light and small, the internal lithium battery pack can be replaced freely, and the lithium battery pack is convenient to use. Most of the existing lithium battery pack shells are fixed through screws, although rubber pads are arranged at the shells, the waterproof effect of the battery pack shells is poor, water seepage, humidity inside the shells and the like still occur when special weather is met, humid air and water easily enter the battery pack shells, normal use of batteries is affected, for example, a light person affects normal discharge of the lithium ion battery pack, damage to the lithium ion battery pack possibly occurs when serious potential safety hazards occur.

Disclosure of Invention

Aiming at the technical problems in the prior art, the utility model provides a battery pack structure, which comprises a shell, wherein a battery cell group is arranged in the shell, the shell comprises a shell body and a cover body, and the cover body is connected with the shell body through threads.

In an embodiment, the cover body comprises a first cover body and a second cover body, one end of the housing body is connected with the first cover body through threads, the other end of the housing body is connected with the second cover body through threads, and an external interface is arranged on the first cover body.

In an embodiment, the first cover is further provided with a power switch.

In an embodiment, the first cover body is further provided with a current protection device.

In an embodiment, the electric core group comprises a plurality of electric core group units, each electric core group unit comprises a plurality of electric cores, two ends of each electric core are fixed on an electric core bracket, and two adjacent electric core group units are connected through the electric core brackets.

In an embodiment, a battery cell mounting groove is formed in the battery cell support, the battery cell is fixed in the battery cell mounting groove, a limiting piece is arranged in the battery cell mounting groove, and the limiting piece is in mirror image distribution on the battery cell mounting groove.

In an embodiment, the battery cell group further includes a conductive sheet, the conductive sheet includes a first conductive sheet and a second conductive sheet, one end of the battery cell group near the first cover body is covered with the first conductive sheet, and one end of the battery cell group near the second cover body is covered with the second conductive sheet.

In one embodiment, the conductive sheet is connected to the battery cell through the battery cell mounting groove.

In an embodiment, a circuit board is further disposed in the housing, and the circuit board is connected to the first conductive sheet.

The utility model also provides a power supply device which comprises the battery pack structure.

Compared with the prior art, the technical scheme provided by the utility model has at least the following beneficial effects:

1. in the battery pack structure provided by the utility model, the shell comprises the shell body and the cover body, and the shell body and the cover body adopt a threaded connection structure, so that compared with a screw fixing structure in the prior art, the design of holes, grooves and the like is avoided on the shell, the condition that water vapor enters the inside of the shell from the holes, grooves and the like is avoided, the sealing performance in the shell is better, the waterproof requirement of IP67 can be met, and the safety of the battery pack is improved;

2. the shell body and the cover body adopt a threaded connection structure, so that the assembly process of the battery pack is simplified, the condition of laborious disassembly and assembly of the battery pack is improved, and the shell provided by the utility model has a simple structure, reduces the processing and manufacturing difficulty of the shell, and is beneficial to reducing the production cost;

3. the cover body is provided with a power switch and a current protection device, the power switch is used for preventing safety accidents caused by electric leakage of the battery pack, and meanwhile, when the battery pack is in an idle state, the power switch can be used for conducting power-off operation, so that the consumption of electric energy is reduced; the current protection device is arranged outside the cover body, which is beneficial to the replacement of the current protection device.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a battery pack structure according to an embodiment;

fig. 2 is a schematic structural diagram of a cell holder according to an embodiment;

fig. 3 is a schematic diagram of a connection of two cell holders.

Wherein, the reference numerals are as follows: 10-battery pack structure, 100-shell, 110-shell body, 120-cover body, 121-first cover body, 122-second cover body, 200-battery cell group, 210-battery cell group unit, 211-battery cell, 212-battery cell support, 213-battery cell mounting groove, 214-limiting piece, 220-conducting piece, 221-first conducting piece, 222-second conducting piece, 300-external interface, 400-power switch, 500-current protection device and 600-circuit board.

Detailed Description

In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the utility model. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In the prior art, the lithium battery pack shell is mostly fixed through screws, holes, grooves and other designs are formed in the shell, although rubber pads are arranged at the sealing positions of the shell, the waterproof effect of the lithium battery pack shell is poor, water seepage, humidity inside the shell and other conditions still occur when special weather is met, humid air and water easily enter the battery pack shell from the holes, grooves and other positions, normal use of a battery is affected, for example, a light person affects normal discharge of the lithium battery pack, damage to the lithium battery pack possibly occurs when serious damage occurs, and potential safety hazards occur. In view of this, the utility model provides a battery pack structure, in which the shell adopts a threaded connection structure, compared with the screw fixing structure in the prior art, the design of holes, grooves and the like is avoided on the shell, the condition that water vapor enters the inside of the shell from the holes, grooves and the like is avoided, so that the sealing performance in the shell is better, the waterproof requirement of IP67 can be met, and the safety of the battery pack is improved.

In one embodiment, as shown in fig. 1, a battery pack structure 10 includes a housing 100, a battery cell 200 is disposed in the housing 100, the housing 100 includes a housing body 110 and a cover 120, and the cover 120 is connected with the housing body 110 through threads. Specifically, the cover 120 includes a first cover 121 and a second cover 122, one end of the housing body 110 is screwed with the first cover 121, the other end is screwed with the second cover 122, the housing body 110 is connected with the first cover 121 and the second cover 122 to form a housing structure, and the battery cell set 200 is disposed in the housing structure. The port of the battery pack to which the external power source or the device is connected is called an external interface, and the external interface is provided on the cover, for example, the external interface 300 is provided on the first cover 121.

In an embodiment, in order to improve the safety performance of the battery pack, the first cover 121 is further provided with a power switch 400 and a current protection device 600, and optionally, the current protection device 600 is a fuse. When the conditions such as electric leakage and the like occur, the power supply can be cut off in time through the power switch 400, so that further safety accidents are avoided; meanwhile, when the battery pack is in an idle state, the power-off operation can be performed through the power switch 400, so that the consumption of electric energy is reduced. The current protection device 600 is used for overload protection, when the current in the battery pack is abnormal, the current protection device 600 can be fused to cut off the current, compared with the prior art that the current protection device 600 is arranged in the shell structure, the current protection device 600 is arranged on the cover 120 externally, and the replacement is convenient.

In an embodiment, as shown in fig. 1-3, the battery cell set 200 includes a plurality of battery cell set units 210, each battery cell set unit 210 includes a plurality of battery cells 211, two ends of each battery cell 211 are fixed on a battery cell bracket 212, and two adjacent battery cell set units 210 are connected through the battery cell bracket 212. Specifically, a battery cell mounting groove 213 is formed in the battery cell bracket 212, a limiting piece 214 is arranged at one end of the battery cell mounting groove 213, the limiting piece 214 is used for limiting and fixing the position of the battery cell 211 in the battery cell mounting groove 213, and the limiting piece 214 is distributed in a mirror image manner on the battery cell mounting groove 213 so as to ensure the fixing and limiting effects of the battery cell 211. When the adjacent cell units 210 are connected, the two cells are connected through the cell supports 212, for example, in each cell unit 210, two ends of the cell 211 are fixed on the cell supports 212, that is, each cell unit 210 includes the cell 211 and two cell supports 212, a cell mounting position is formed between the two cell supports 212, the cell 211 is placed in the cell mounting position, the different cell units 210 are sequentially arranged according to a designated sequence, the different cell units 210 can be connected through the cell supports 212, at this time, the connection states of the adjacent two cell supports 212 are as shown in fig. 3, the two cell supports 212 are connected to form a whole, the two cell mounting grooves 213 are mutually communicated, and the limiting piece 214 is located between the two cell mounting grooves 213. It is understood that the two cell holders 212 for connecting the two battery cells 210 may be designed as an integrally formed structure to reduce the battery assembly process.

In one embodiment, the battery cell 200 further includes a conductive sheet 220, where it should be noted that the conductive sheet 220 functions as a bus bar in the prior art for conducting electricity and collecting current. The conductive sheet 220 includes a first conductive sheet 221 and a second conductive sheet 222, wherein the first conductive sheet 221 is covered on an end of the cell group 220 near the first cover 121, and the second conductive sheet 222 is covered on an end of the cell group 220 near the second cover 122. The conductive pads 220 are each connected to the battery cell 211 through the battery cell mounting groove 213, for example, the conductive pads 220 are spot-welded to the battery cell 211.

In an embodiment, the battery pack structure 10 further includes a circuit board 600, where the circuit board 600 is connected to the first conductive sheet 221, and optionally, the circuit board 600 is a BMS circuit board, and the circuit board 600 can monitor the state of the battery cells 211 and control the energy output of the battery pack.

Based on the same conception, the present utility model also provides a power supply device, which is different from the power supply device in the prior art in that the battery pack structure used is the battery pack structure 10 provided by the present utility model.

The above embodiments represent only a few embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the present utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. The battery pack structure comprises a shell, wherein an electric core group is arranged in the shell, and the battery pack structure is characterized in that the shell comprises a shell body and a cover body, and the cover body is connected with the shell body through threads.

2. The battery pack structure according to claim 1, wherein the cover body comprises a first cover body and a second cover body, one end of the housing body is connected with the first cover body through threads, the other end of the housing body is connected with the second cover body through threads, and an external interface is arranged on the first cover body.

3. The battery pack structure of claim 2, wherein the first cover is further provided with a power switch.

4. The battery pack structure of claim 2, wherein the first cover is further provided with a current protection device.

5. The battery pack structure according to any one of claims 1-4, wherein the battery pack comprises a plurality of battery pack units, each battery pack unit comprises a plurality of battery cells, both ends of each battery cell are fixed on a battery cell bracket, and two adjacent battery cell units are connected through the battery cell bracket.

6. The battery pack structure according to claim 5, wherein the cell support is provided with a cell mounting groove, the cell is fixed in the cell mounting groove, a limiting piece is arranged in the cell mounting groove, and the limiting piece is in mirror image distribution on the cell mounting groove.

7. The battery pack structure of claim 6, wherein the cell pack further comprises a conductive sheet, the conductive sheet comprises a first conductive sheet and a second conductive sheet, one end of the cell pack near the first cover is covered with the first conductive sheet, and one end of the cell pack near the second cover is covered with the second conductive sheet.

8. The battery pack structure of claim 7, wherein the conductive tab is connected to the cell through the cell mounting slot.

9. The battery pack structure of claim 8, wherein a circuit board is further disposed within the housing, the circuit board being connected to the first conductive sheet.

10. A power supply device, characterized in that it comprises a battery structure according to any one of claims 1-9.