CN221327914U

CN221327914U - Battery pack structure and battery

Info

Publication number: CN221327914U
Application number: CN202323199136.3U
Authority: CN
Inventors: 廖方俊; 罗自皓; 王燕青
Original assignee: Zhuhai Cosmx Power Co Ltd
Current assignee: Zhuhai Cosmx Power Co Ltd
Priority date: 2023-11-24
Filing date: 2023-11-24
Publication date: 2024-07-12
Anticipated expiration: 2033-11-24

Abstract

The application provides a battery pack structure, which is used in the technical field of batteries, and particularly relates to a battery pack structure, comprising a shell, wherein the shell comprises a first plate and a second plate, the second plate is perpendicular to the first plate, and a plurality of guide grooves are formed in the second plate; the battery cell group comprises a plurality of battery cells, the battery cell group is arranged in the shell, and the lugs of the battery cells pass through the guide grooves and are exposed on the outer surface of the second plate; BMS plates disposed in parallel outside the second plate while maintaining a gap with the second plate; and the electrode lugs are electrically connected with the BMS plate through the electric connecting sheets. Above-mentioned battery package structure, the guide way that the tab of electric core offered through the casing second board stretches out, and the rethread electric connection piece is with the BMS board of tab electricity to second board top to save keysets, signal connector, some bubble cotton material, can effectively reduce material cost, promoted group battery space utilization. The application also provides a battery, which comprises the battery pack structure.

Description

Battery pack structure and battery

Technical Field

The application relates to the technical field of batteries, in particular to a battery pack structure and a battery.

Background

At present, the cordless trend of cleaning electric appliances (dust collectors, steam machines, floor washing machines and the like) and electric tool products is more and more obvious, the cordless brings great convenience, so that people can more flexibly apply tools in life and work,

The applications of the clean electrical appliance battery and the electric tool battery mainly include 2 batteries, one of which is: a cylindrical cell; and two,: the soft-package battery cell has the advantages and disadvantages of low cost, high yield, but slightly poor performance, and good performance but high cost. Therefore, how to simplify the structure of the soft package battery, improve the utilization rate of the internal space of the battery and reduce the cost of the soft package battery is an urgent problem to be solved.

Disclosure of utility model

In view of this, the application provides a battery pack structure and a battery, wherein an electric connection sheet is arranged between a second plate of a shell and a BMS plate, and a tab is extended from the second plate and is electrically connected to the BMS plate above the second plate, so that an adapter plate, a signal connector and part of foam materials are saved, the material cost can be effectively reduced, and the space utilization rate of a battery pack is improved.

In order to achieve the above purpose, the present application provides the following technical solutions:

A battery pack structure, comprising:

the shell comprises a first plate and a second plate, wherein the second plate is perpendicular to the first plate, and a plurality of guide grooves are formed in the second plate;

the battery cell group comprises a plurality of battery cells, the battery cell group is arranged in the shell, and the lugs of the battery cells pass through the guide grooves and are exposed on the outer surface of the second plate;

BMS plates disposed in parallel outside the second plate and spaced apart from the second plate;

And the electric connection sheet is arranged between the second plate and the BMS plate, and the tab is electrically connected with the BMS plate through the electric connection sheet.

Optionally, the electric connection piece include with the connection piece body that the utmost point ear of electric core is connected and with BMS connecting portion that BMS board is connected, the connection piece body is on a parallel with the upper surface setting of second board, the utmost point ear of electric core is buckled and is connected on the upper surface or the lower surface of connection piece body, the connection piece body with there is the clearance between the second board.

Optionally, the distance between the connecting piece body and the second plate is H1, and the value of H1 satisfies: h1 is more than or equal to 0.3mm and less than or equal to 4mm.

Optionally, the electric connection sheet comprises a total positive BUS, a total negative BUS and a signal acquisition connection sheet;

The positive electrode lug of the battery cell at one end of the battery cell group is electrically connected with the total positive BUS;

The positive electrode tab of one cell in the middle of the cell group is connected with the negative electrode tab of the other adjacent cell and is electrically connected with one signal acquisition connecting sheet;

And the negative electrode lug of the battery cell at the other end of the battery cell group is electrically connected with the total negative BUS.

Optionally, an insulating retaining wall is arranged between the total positive BUS and the adjacent signal acquisition connecting sheet.

Optionally, the first direction of the second plate is a direction parallel to the battery cells, and the battery cells of the battery cell group are arranged along a second direction perpendicular to the first direction;

The signal acquisition connecting piece comprises a first signal connecting piece and a second signal connecting piece, and the first signal connecting piece is uniformly distributed at one end of the second plate in the first direction; the total positive BUS, the second signal connecting sheet and the total negative BUS are sequentially and uniformly distributed at the other end of the second plate in the first direction.

Optionally, the first signal connection piece includes a first body portion and a first connection portion that are connected to each other, and the positive electrode tab of one of the battery cells and the negative electrode tab of the other battery cell are overlapped with each other on the first body portion; the end part of the first connecting part is bent towards the BMS plate to form a first terminal part, and the first terminal part is electrically connected with the BMS plate;

The second signal connecting piece comprises a second body part and a second connecting part which are connected with each other, and the positive electrode lug of one battery cell and the negative electrode lug of the other battery cell are mutually overlapped on the second body part; the end of the second connecting part is bent towards the direction of the BMS plate to form a second terminal part, and the second terminal part is electrically connected with the BMS plate.

Optionally, the first terminal portion and the second terminal portion are both disposed at the other end of the second plate in the first direction and aligned with each other.

Optionally, the width ratio of the first body portion to the first connecting portion is K1, the width ratio of the second body portion to the second connecting portion is K2, and the K1 and K2 satisfy: k1 is more than or equal to 2.5 and less than or equal to 3.5,2.5, K2 is more than or equal to 3.5.

Optionally, the total positive BUS includes a total positive body portion and a total positive lead portion that are disposed perpendicular to each other, a length direction of the total positive body portion is disposed along a first direction of the second plate, the total positive lead portion is disposed along a second direction of the second plate, and a positive tab of one cell is lapped on the total positive body portion; the end part of the total positive connection lead part is bent upwards to form a total positive terminal part, and the total positive terminal part is electrically connected with the BMS board;

the total negative BUS comprises a total negative body part and a total negative connecting part which are mutually perpendicular, the length direction of the total negative body part is arranged along the first direction of the second plate, and the negative electrode lug of one battery cell is lapped on the total negative body part; the total negative connection lead part is arranged along the second direction of the second plate, the end part of the total negative connection lead part is bent upwards to form a total negative terminal part, and the total negative terminal part is electrically connected with the BMS plate.

Optionally, the width ratio of the total positive body portion to the total positive connection portion is K3, the width ratio of the total negative body portion to the total negative connection portion is K4, and the K3 and K4 satisfy: k3 is more than or equal to 1 and less than or equal to 1.2,1, K4 is more than or equal to 1.2.

Optionally, a connecting piece locating column for locating the electric connecting piece is further arranged on the second plate.

Optionally, the inner surface of the second plate is further provided with a guide block, the guide block is provided with two guide surfaces, an included angle exists between two opposite guide surfaces of the adjacent two guide blocks, the distance between two opposite guide surfaces of the adjacent two guide blocks is gradually reduced from bottom to top, and a gap between the tops of the adjacent two guide blocks forms the guide groove.

Optionally, two guide surfaces of the guide block are provided with glue reducing holes.

Optionally, the cross section of the guide block is inverted triangle.

Optionally, two vertex angles of the inverted triangle are provided with round chamfers.

Optionally, the radius of the round chamfer is R, and the value of R is more than or equal to 0.2mm and less than or equal to 3mm.

Optionally, the included angle between two opposite guide surfaces of two adjacent guide blocks is A, and the value of A is more than or equal to 30 degrees and less than or equal to 85 degrees.

Optionally, the width of the guide groove is W, and the value of W satisfies: w is more than or equal to 0.3mm and less than or equal to 3mm.

Optionally, the distance between the BMS board and the second board is H2, and the value of H2 satisfies: h2 is more than or equal to 1mm and less than or equal to 10mm.

Optionally, an insulating interlayer is disposed between the BMS board and the second board.

According to the battery pack structure provided by the application, the lugs of the battery core extend out through the guide grooves formed in the second plate of the shell, and are electrically connected to the BMS plate above the second plate through the electric connection sheets arranged between the second plate and the BMS plate, so that the adapter plate, the signal connector and part of foam materials are saved, the material cost can be effectively reduced, and the space utilization rate of the battery pack is improved.

The application also provides a battery, which comprises the battery pack structure.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present application, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

Fig. 1 is a perspective view of a battery pack structure according to the present application;

FIG. 2 is an exploded view of the battery pack structure of the present application;

FIG. 3 is a second exploded view of the battery pack structure of the present application;

FIG. 4 is an enlarged view of the structure within the block of FIG. 3;

Fig. 5 is a perspective view of the battery pack structure of the present application with the BMS plates removed;

FIG. 6 is a schematic view of a housing according to the present application;

FIG. 7 is a second schematic illustration of the housing of the present application;

FIG. 8 is a schematic diagram of the overall positive BUS of the present application;

FIG. 9 is a schematic diagram of the overall negative BUS of the present application;

FIG. 10 is a schematic view of a first signal bond pad of the present application;

FIG. 11 is a schematic diagram of a second signal bond pad of the present application;

FIG. 12 is a partial cross-sectional view of the battery pack structure of the present application;

FIG. 13 is an enlarged view of the section of FIG. 12;

fig. 14 is a schematic view showing the separation of a housing and a telecommunications of the battery pack structure of the present application;

FIG. 15 is a schematic view of section B-B of FIG. 14;

FIG. 16 is an enlarged view of the structure within the block of FIG. 15;

fig. 17 is an enlarged view of the second plate structure of fig. 16.

In fig. 1-17:

1. A housing; 11. a first plate; 12. a second plate; 121. a guide groove; 13. a guide block; 131. a glue reducing hole; 132. a guide surface; 14. an insulating retaining wall; 15. connecting a sheet positioning column;

2. A battery cell; 22. a tab; 221. a positive electrode tab; 222. a negative electrode tab;

3. BMS board;

4. An electrical connection piece; 41. total positive BUS; 42. total negative BUS; 43. a signal acquisition connecting sheet; 431. a first signal connection pad; 432. a second signal connection pad;

5. soaking cotton; 6. and (5) a screw.

Detailed Description

The application provides a battery pack structure, which is characterized in that an electric connection sheet is arranged between a second plate of a shell and a BMS plate, and a tab extends out from the second plate and is electrically connected to the BMS plate above the second plate, so that an adapter plate, a signal connector and part of foam materials are saved, the material cost can be effectively reduced, and the space utilization rate of a battery pack is improved.

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

As shown in fig. 1 to 4, the battery pack structure provided by the application comprises a housing 1, a battery cell group, a BMS board 3 and an electric connection sheet 4, wherein:

The shell 1 comprises a first plate 11 and a second plate 12, wherein the second plate 12 is perpendicular to the first plate 11, the second plate 12 is connected to the top of each first plate 11 in the figure, and a plurality of guide grooves 121 are formed in the second plate 12;

The battery cell group comprises a plurality of battery cells 2, the battery cell group is arranged in the shell 1, foam 5 is arranged between the battery cell group and the shell 1, and the electrode lugs 22 of the battery cells 2 pass through the guide grooves 121 and are exposed above the second plate 12;

A BMS board 3 disposed above the second plate 12 while maintaining a gap with the second plate 12, the BMS board 3 being fixed to the support columns of the second plate 12 by screws 6;

And an electric connection sheet 4, which is arranged between the second plate 12 and the BMS plate 3, wherein the electrode lug 22 is electrically connected with the BMS plate 3 through the electric connection sheet 4, and the electric connection sheet 4 is generally made of metal, and is usually a copper sheet, a nickel sheet or a copper sheet with a plating layer.

The traditional soft-pack battery is generally provided with the tab 22 on the side surface of the shell 1, namely, the tab 22 of the battery core 2 extends out from the side surface of the shell 1, and then the tab 22 on the side surface is electrically connected with the BMS board 3 on the top of the shell 1 through the adapter plate, so that the scheme is required to be provided with the components such as the adapter plate, the signal connector and the like, so that materials are wasted, and space is wasted;

In the application, the electric connection sheet 4 is arranged between the second plate 12 of the shell 1 and the BMS plate 3, and the tab 22 extending from the guide groove 121 of the second plate 12 is electrically connected to the BMS plate 3 above the second plate 12, so that materials of the adapter plate, the signal connector and part of foam 5 are saved, the material cost can be effectively reduced, and the space utilization rate of the battery pack is improved.

As shown in fig. 5, 12 and 13, in a preferred embodiment, the electrical connection tab 4 includes a connection tab body connected to the tab 22 of the battery cell 2 and a BMS connection part connected to the BMS board 3, the connection tab body is disposed parallel to the upper surface of the second board 12, the tab 22 of the battery cell 2 is bent and connected to the upper surface or the lower surface of the connection tab body, and a gap exists between the connection tab body and the second board 12.

In the application, the connection mode between the tab 22 and the electric connection sheet 4 is that after the tab 22 of the battery cell 2 passes through the shell 1, the tab 22 is bent on the upper surface or the lower surface of the electric connection sheet 4 for laser welding, preferably, in the embodiment, the tab 22 is bent on the upper surface of the electric connection sheet 4 for laser welding; the electric connection sheet 4 can be placed on the shell 1 or the tooling jig, after welding is completed, the electric connection sheet 4 and the shell 1 are kept at a certain distance, the distance can be realized through the tooling jig, the distance can ensure that the lug 22 of the battery is not pulled during mechanical vibration, and the mechanical reliability of the battery is improved.

In a preferred embodiment, the spacing between the connecting piece body and the second plate 12 is H1, and the spacing between the connecting piece body and the second plate 12 is in a range that is required to meet the buffering requirement of the battery during mechanical vibration, and avoid that the tab 22 cannot effectively support the connecting piece due to the excessive spacing between the connecting piece body and the second plate 12; therefore, in the present embodiment, the value of H1 satisfies: h1 is more than or equal to 0.3mm and less than or equal to 4mm.

As shown in fig. 5, 8-11, in a preferred embodiment, the electrical connection pads 4 include a total positive BUS41, a total negative BUS42, and a signal acquisition connection pad 43;

The positive electrode tab 221 of the battery core 2 at one end of the battery core group is electrically connected with the total positive BUS 41;

The positive electrode tab 221 of one cell 2 in the middle of the cell group is connected with the negative electrode tab 222 of the other adjacent cell 2 and is electrically connected with one signal acquisition connecting sheet 43; that is, one cell 2 and the adjacent cell 2 with different polar lugs are overlapped and welded on the connecting sheet body of the same signal acquisition connecting sheet 43;

The negative electrode lug 222 of the battery cell 2 at the other end of the battery cell group is electrically connected with the total negative BUS 42;

Thus, the tabs 22 of the battery cells 2 of the battery cell group are connected in series through the connecting sheet bodies of the plurality of signal acquisition connecting sheets 43, and the BMS connecting parts of the plurality of signal acquisition connecting sheets 43 are respectively and electrically connected with the BMS board 3; the battery cells 2 at two ends of the battery cell group are respectively provided with a positive electrode tab 221 and a negative electrode tab 222 which are electrically connected with the total positive BUS41 and the total negative BUS42, and then are electrically connected with the BMS plate 3; the BMS is electrically connected to the respective electrical connection pads 4 by soldering.

The signal collecting tab 43 includes a first signal tab 431 and a second signal tab 432, and the BMS connection part of the second signal tab 432 is longer than the first signal tab 431, so that the ends of the BMS connection parts of the first signal tab 431 and the second signal tab 432 are converged at the same side position of the battery cell 2, and are connected to one side of the BMS board 3 in a uniform manner;

the total positive BUS41 and the total negative BUS42 are then correspondingly provided at the other side of the BMS board 3.

After the corresponding lugs 22 are welded on the total positive BUS41 and the adjacent signal acquisition connecting sheet 43 respectively, the distance between the total positive BUS41 and the adjacent signal acquisition connecting sheet is smaller, and if vibration is encountered, mutual contact is likely to occur, so that short circuit is caused;

To avoid this, as shown in fig. 5-6, in a preferred embodiment, an insulating retaining wall 14 is disposed between the total positive BUS41 and the adjacent signal acquisition tab 43, and the insulating retaining wall 14 is capable of separating the total positive BUS41 and the positive tab 221 welded thereon from the adjacent signal acquisition tab 43 and the positive tab 221 and the negative tab 222 welded thereon, so as to prevent the tab 22 of the cell 2 from contacting the other tab 22 and causing a short circuit risk.

In a preferred embodiment, the first direction of the second plate is a direction parallel to the cells, and the cells of the cell group are arranged in a second direction perpendicular to the first direction;

The signal acquisition connecting piece comprises a first signal connecting piece and a second signal connecting piece, and the first signal connecting piece is uniformly distributed at one end of the second plate in the first direction; the total positive BUS, the second signal connecting sheet and the total negative BUS are sequentially and uniformly distributed at the other end of the second plate in the first direction;

Specifically, as shown in fig. 5, the right side in the drawing is one end of the second board in the first direction, and 4 first signal connection pieces are disposed on the one side; the left side of the figure is the other end of the second plate in the first direction, and the total positive BUS, the 3 second signal connecting pieces and the total negative BUS are arranged in sequence from top to bottom;

The first signal connecting sheet, the second signal connecting sheet, the total positive BUS and the total negative BUS are all arranged in the groove on the outer surface of the second plate for positioning;

The first signal connection piece, the second signal connection piece, the total positive BUS and the total negative BUS are reasonably distributed, and the space between the second plate and the BMS plate can be utilized to the maximum extent.

In a preferred embodiment, as shown in fig. 5, 10 and 11, the first signal connection piece includes a first body portion and a first lead portion connected to each other, the first body portion having a width greater than the first lead portion; the positive electrode tab of one cell and the negative electrode tab of the other cell are mutually overlapped on the wider first body part; the end part of the first connecting part is bent towards the BMS plate to form a first terminal part, and the purpose of the first terminal part is to be electrically connected with the BMS plate;

Similarly, the second signal connecting piece comprises a second body part and a second connecting part which are connected with each other, and the width of the second body part is larger than that of the second connecting part; the positive electrode tab of one cell and the negative electrode tab of the other cell are mutually overlapped on the wider second body part; the end part of the second connecting and guiding part is bent towards the BMS plate to form a second terminal part, and the second terminal part is electrically connected with the BMS plate;

Thus, the wider first body part and the wider second body part are used for supporting and electrically connecting with the lugs of the battery cell; the narrower first connecting part and the second connecting part realize the electric connection between the tab of the battery core and the BMS board.

In a preferred embodiment, as shown in fig. 5, in order to reasonably use space, the first terminal part and the second terminal part are disposed at the other end of the second board in the first direction and aligned with each other, so that the first signal connection piece and the second signal connection piece are on the same side as the connection terminals of the BMS board, which is also beneficial to the design layout of the internal circuits of the BMS board when the BMS board is designed.

In a preferred embodiment, for the purpose of enabling the widths of the first body portion and the second body portion to be sufficient for supporting the electrode tab effectively and enabling the widths of the first connection portion and the second connection portion to meet the signal transmission, the width ratio of the first body portion to the first connection portion is K1, the width ratio of the second body portion to the second connection portion is K2, and K1, K2 satisfy: k1 is more than or equal to 2.5 and less than or equal to 3.5,2.5, K2 is more than or equal to 3.5.

In a preferred embodiment, as shown in fig. 5, 8 and 9, the total positive BUS includes a total positive body portion and a total positive lead portion which are disposed perpendicular to each other, the length direction of the total positive body portion is disposed along the first direction of the second plate, and the positive tab of one cell is overlapped on the total positive body portion; the total positive connection lead part is arranged along the second direction of the second plate, the end part of the total positive connection lead part is bent upwards to form a total positive terminal part, and the total positive terminal part is electrically connected with the BMS plate;

the total negative BUS comprises a total negative body part and a total negative connecting part which are mutually perpendicular, the length direction of the total negative body part is arranged along the first direction of the second plate, and the negative electrode lug of one battery cell is lapped on the total negative body part; the total negative connection lead part is arranged along the second direction of the second plate, the end part of the total negative connection lead part is bent upwards to form a total negative terminal part, and the total negative terminal part is electrically connected with the BMS plate;

Specifically, as shown in fig. 5, the length direction of the total positive connection lead portion is perpendicular to the length direction of the total positive body portion, and the end portion of the total positive connection lead portion is bent upwards near the upper edge of the second plate to form a total positive terminal portion; the length direction of the total negative connecting and guiding part is perpendicular to the length direction of the total negative body part, and the end part of the total negative connecting and guiding part is upwards bent at the position close to the lower edge of the second plate to form the total negative terminal part, so that the total positive terminal part and the total negative terminal part are arranged as close as possible to the upper edge and the lower edge, and interference with other parts is avoided.

In a preferred embodiment, for the purpose of making the widths of the total positive body portion and the total negative body portion sufficient for effectively supporting the electrode tab and making the widths of the total positive lead portion and the total negative lead portion capable of satisfying the requirement of electrical connection, the width ratio of the total positive body portion to the total positive lead portion is K3, the width ratio of the total negative body portion to the total negative lead portion is K4, and K3, K4 satisfy: k3 is more than or equal to 1 and less than or equal to 1.2,1, K4 is more than or equal to 1.2.

As shown in fig. 5-6, in a preferred embodiment, the second plate 12 is further provided with tab locating posts 15 for locating the electrical tabs 4; correspondingly, the electric connection pieces 4 are provided with positioning holes, and each connection piece positioning column 15 is respectively penetrated in the positioning hole of each electric connection piece 4, so that each electric connection piece 4 is rapidly positioned on the second plate 12.

As shown in fig. 12-17, in a preferred embodiment, the inner surface of the second plate 12 is further provided with a plurality of guide blocks 13, the guide blocks 13 are provided with two guide surfaces 132, an included angle exists between two opposite guide surfaces 132 of two adjacent guide blocks 13, the distance between two opposite guide surfaces 132 of two adjacent guide blocks 13 is tapered from bottom to top, and a gap between the tops of two adjacent guide blocks 13 forms a guide groove 121;

The length direction of the guide groove 121 coincides with the width direction of the tab, so that the tab can be inserted from below the guide groove 121 and pass out from the outer surface of the second plate 12;

The guide block 13 and the guide groove 121 formed by the guide block are used for penetrating and guiding the electrode lugs of the battery cell group, so that the assembly of the process is facilitated, and the assembly efficiency is improved.

In a preferred embodiment, as shown in fig. 3-7, in order to meet the requirement of uniform thickness of each wall surface of the housing 1, the two guide surfaces 132 of the guide block 13 are provided with glue reducing holes 131.

In a preferred embodiment, the guide block 13 is inverted triangular in cross-section, as shown in figures 12-17.

The guide blocks 13 with inverted triangle sections have simple structures, and the two surfaces of the adjacent guide blocks 13 can meet the requirement of reaching the guide groove 121 between the two guide surfaces 132 when the tab is inserted and pulled out, and are easy to process.

In a preferred embodiment, as shown in fig. 12-17, rounded chamfers are provided at the two apex corners of the inverted triangle. The rounded corners are arranged at the two vertex angles of the inverted triangle, so that the stress is dispersed when the tab is inserted into or pulled out of the guide groove 121, namely, the tab is pulled by the second plate 12, and the tab breaking prevention device has a certain effect.

As shown in FIG. 17, in a preferred embodiment, the radius of the round chamfer is R, and the radius R of the round chamfer is too large to play a role in protecting the tab from being smoothly introduced, so that the value of R in the embodiment satisfies 0.2 mm.ltoreq.R.ltoreq.3 mm for protecting the tab from being smoothly introduced.

As shown in fig. 17, in a preferred embodiment, the angle between two opposing guide surfaces 132 of two adjacent guide blocks 13 is a; a cannot be too small, otherwise, the tab cannot pass smoothly, and if too large, the requirement of constraint guiding of the tab cannot be met; in order to smoothly guide the tab into the guide groove 121, the value of A in this embodiment satisfies 30 DEG A < 85 deg.

As shown in fig. 17, in a preferred embodiment, the width of the guide groove 121 is W, and W cannot be too small or the tab cannot be smoothly inserted into the guide groove 121, and too large affects the arrangement and installation of the electric connection piece 4; in order to facilitate the introduction of the tab into the guide groove 121 and to facilitate the installation as a whole, in this embodiment, the value of W satisfies the following: w is more than or equal to 0.3mm and less than or equal to 3mm.

In a preferred embodiment, the distance between the BMS plate 3 and the second plate 12 is H2, and in order to meet the insulation performance requirement of the BMS plate 3 and the respective electrical connection pads 4, the value of H2 satisfies: h2 is more than or equal to 1mm and less than or equal to 10mm.

Further, an insulating spacer layer is provided between the BMS board 3 and the second board 12 for improving the insulating properties of the BMS board 3 and the respective electrical connection pieces 4.

The application also provides a battery, and the battery pack structure is used.

The basic principles of the present application have been described above in connection with specific embodiments, but it should be noted that the advantages, benefits, effects, etc. mentioned in the present application are merely examples and not intended to be limiting, and these advantages, benefits, effects, etc. are not to be construed as necessarily possessed by the various embodiments of the application. Furthermore, the specific details disclosed herein are for purposes of illustration and understanding only, and are not intended to be limiting, as the application is not necessarily limited to practice with the above described specific details.

The block diagrams of the devices, apparatuses, devices, systems referred to in the present application are only illustrative examples and are not intended to require or imply that the connections, arrangements, configurations must be made in the manner shown in the block diagrams. As will be appreciated by one of skill in the art, the devices, apparatuses, devices, systems may be connected, arranged, configured in any manner. Words such as "including," "comprising," "having," and the like are words of openness and mean "including but not limited to," and are used interchangeably therewith. The words "or" and "as used herein refer to the word" or "and are used interchangeably herein unless the context clearly indicates otherwise. The term "such as" as used herein refers to, and is used interchangeably with, the phrase "such as, but not limited to.

It is also noted that in the apparatus, devices and methods of the present application, the components or steps may be separated or recombined. These decompositions or recombinations should be regarded as equivalents of the present application.

The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the application. Thus, the present application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

It should be understood that the terms "first", "second", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present application are used for more clearly describing the technical solutions, and are not intended to limit the scope of the present application.

The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit embodiments of the application to the form disclosed herein. Although a number of example aspects and embodiments have been discussed above, a person of ordinary skill in the art will recognize certain variations, modifications, alterations, additions, and subcombinations thereof.

Claims

1. A battery pack structure, comprising:

2. The battery pack structure of claim 1, wherein the electric connection tab comprises a connection tab body connected with the tab of the battery cell and a BMS connection part connected with the BMS board, the connection tab body is disposed parallel to the upper surface of the second board, the tab of the battery cell is bent and connected on the upper surface or the lower surface of the connection tab body, and a gap exists between the connection tab body and the second board.

3. The battery pack structure according to claim 2, wherein a distance between the connecting piece body and the second plate is H1, and a value of H1 satisfies: h1 is more than or equal to 0.3mm and less than or equal to 4mm.

4. The battery pack structure of claim 1, wherein the electrical connection tabs comprise a total positive BUS, a total negative BUS, and a signal acquisition connection tab;

5. The battery pack structure of claim 4, wherein an insulating retaining wall is provided between the general positive BUS and the adjacent signal acquisition connection tab.

6. The battery pack structure of claim 4, wherein the first direction of the second plate is a direction parallel to the cells, the cells of the cell group being arranged in a second direction perpendicular to the first direction;

7. The battery pack structure of claim 6, wherein the first signal connection piece comprises a first body portion and a first lead portion that are connected to each other, the positive tab of one of the battery cells and the negative tab of the other of the battery cells being overlapped with each other on the first body portion; the end part of the first connecting part is bent towards the BMS plate to form a first terminal part, and the first terminal part is electrically connected with the BMS plate;

The second signal connecting piece comprises a second body part and a second connecting part which are connected with each other, and the positive electrode lugs of the two electric cores and the negative electrode lugs of the other two electric cores are mutually overlapped on the second body part; the end of the second connecting part is bent towards the direction of the BMS plate to form a second terminal part, and the second terminal part is electrically connected with the BMS plate.

8. The battery pack structure according to claim 7, wherein the first terminal portion and the second terminal portion are each provided at the other end of the second plate in the first direction and aligned with each other.

9. The battery pack structure of claim 7, wherein the first body portion to first lead portion width ratio is K1, the second body portion to second lead portion width ratio is K2, the K1, K2 satisfying: k1 is more than or equal to 2.5 and less than or equal to 3.5,2.5, K2 is more than or equal to 3.5.

10. The battery pack structure according to claim 6, wherein the total positive BUS includes a total positive body portion and a total positive lead portion that are disposed perpendicular to each other, a length direction of the total positive body portion is disposed along a first direction of the second plate, and a positive tab of one cell is overlapped on the total positive body portion; the total positive connection lead parts are arranged along the second direction of the second plate, the end parts of the total positive connection lead parts are bent upwards to form total positive terminal parts, and the total positive terminal parts are electrically connected with the BMS plate;

11. The battery pack structure of claim 10, wherein the ratio of the width of the total positive body portion to the total positive lead portion is K3, the ratio of the width of the total negative body portion to the total negative lead portion is K4, the K3, K4 satisfying: k3 is more than or equal to 1 and less than or equal to 1.2,1, K4 is more than or equal to 1.2.

12. The battery pack structure of claim 1, wherein the second plate is further provided with a tab locating post for locating the electrical tab.

13. The battery pack structure according to claim 1, wherein the inner surface of the second plate is further provided with a guide block, the guide block is provided with two guide surfaces, an included angle exists between two opposite guide surfaces of two adjacent guide blocks, the distance between two opposite guide surfaces of two adjacent guide blocks is tapered from bottom to top, and the gap between two adjacent guide blocks forms the guide groove.

14. The battery pack structure of claim 13, wherein the guide block is provided with glue reducing holes on both guide surfaces.

15. The battery pack structure of claim 13, wherein the guide block has an inverted triangle in cross section.

16. The battery pack structure of claim 15, wherein rounded chamfers are provided at both vertex corners of the inverted triangle.

17. The battery pack structure of claim 16, wherein the radius of the circular chamfer is R, and the value of R satisfies 0.2mm r.ltoreq.3 mm.

18. The battery pack structure according to claim 13, wherein an angle between two opposing guide surfaces of adjacent two of the guide blocks is a, and a has a value satisfying 30 ° -a < 85 °.

19. The battery pack structure according to claim 1, wherein the guide groove has a width W, and the value of W satisfies: w is more than or equal to 0.3mm and less than or equal to 3mm.

20. The battery pack structure of claim 1, wherein a distance between the BMS board and the second board is H2, and a value of H2 satisfies: h2 is more than or equal to 1mm and less than or equal to 10mm.

21. The battery pack structure of claim 1, wherein an insulating spacer is provided between the BMS board and the second board.

22. A battery comprising a battery pack structure according to any one of claims 1-21.