CN218996908U

CN218996908U - Assembled battery device

Info

Publication number: CN218996908U
Application number: CN202221461679.0U
Authority: CN
Inventors: 王坤利
Original assignee: Shenzhen Dongfang Xinyuan New Energy Co ltd
Current assignee: Shenzhen Dongfang Xinyuan New Energy Co ltd
Priority date: 2022-06-10
Filing date: 2022-06-10
Publication date: 2023-05-09
Anticipated expiration: 2032-06-10

Abstract

The utility model relates to the field of battery structures, in particular to a combined battery device, which comprises a battery shell; the battery cell group is arranged and is pressed against the battery shell side by side, the battery cell group comprises a plurality of independent battery cells which are connected in parallel or in series, and a user can set the number of the battery cells in the battery shell according to the need; the method is characterized in that a large number of current low-cost mature type battery cells are arranged in a newly designed high-capacity battery shell, so that a new-style high-capacity battery product is assembled in a transitional and low-cost manner by utilizing the current mature industrial system; the present application provides an assembly mechanical structure of a cell stack and an off-the-shelf management circuit board, which is designed and manufactured at a far lower cost than a completely manufactured product of a completely new individual cell, forming a transitional alternative product solution. In the case that the new battery demand is not high enough, the market supply by using the existing type of battery cells can be maintained all the time.

Description

Assembled battery device

Technical Field

The utility model relates to the field of battery structures, in particular to an improvement of a device for combining low-cost small-capacity battery cores by adopting mature technology to form a novel battery with larger capacity and high cost.

Background

Different types of batteries, such as batteries of different types of No. 2, no. 5, SC, F, 1865 and 2170, are adopted as battery cell model sizes which can be produced in large quantities at low cost along with the maturity of industrial production, but in the actual industrial development process, some brand new types of batteries, such as 4680 batteries and battery cells, are currently proposed, and Tesla claims to be a novel battery model which is widely applied in the future. The novel 4680 is said to increase the energy density of the battery by a factor of 5 and the cost can be reduced. These technical advantages, which are known as such, require corresponding technical innovations to be realized. The battery sizes such as 1865, 2170 and 4680 are merely size sizes of batteries, for example 1865 refers to a cylindrical battery or cell having a diameter of 18mm and a length of 65 mm.

With the advent of new model size batteries, the market has responded with a match, especially with the control of product parameters by large businesses with monopoly capability, and therefore, the battery requirements of the 4680 model, and the corresponding products using such model, such as flashlights, have begun to increase in volume. However, in the initial stage, the market demand is increased, the number of market demands is insufficient, and the manufacturing cost of the finished product of the novel type battery production line is far more than that of the mature type product if the novel type battery production line is on line completely. Therefore, how to achieve low-cost market-holding capability of the product when matching with the current battery equipment with new model size is a problem faced by a great number of battery manufacturers.

When a new battery with large capacity or large size is just appeared, the whole industrial chain is not established, the cost for directly producing the battery is extremely high, the actual market demand quantity is relatively small, the cost for separately producing the battery in the earlier stage is extremely high due to insufficient demand, and therefore, a transition stage before the formation of the mature industrial chain is necessary to consider the market supply problem of the product, but the prior art has no corresponding solution.

Therefore, the prior art has the defects and is further developed.

Disclosure of Invention

In order to solve the above problems, an object of the present utility model is to provide a combined battery device to solve the problem that a new type of large-capacity battery cannot be assembled at low cost, to supply products in the market before the industrial production capacity is improved to a single product cost low enough, and to solve the problem of the battery market supply capacity of the new type of size battery using equipment.

The utility model aims at realizing the following technical scheme:

the utility model provides a combined battery device, comprising:

a battery case;

the battery cell group is arranged and arranged in the battery shell, and comprises a plurality of independent battery cells which are connected in parallel or in series;

the circuit board is arranged at the end part of the positive electrode in the battery shell;

a battery cell frame is arranged in the battery shell and used for fixing independent battery cells in parallel;

a first nickel strap is arranged at the positive electrode of the battery cell group, and one end of the first nickel strap, which is far away from the battery cell group, is connected with the positive electrode of the circuit board;

an insulating first cushion layer is arranged on the first nickel strap, and the first cushion layer is positioned between the first nickel strap and the circuit board and used for fixing the first nickel strap and supporting the circuit board.

Optionally, the circuit board comprises a main circuit board and a secondary circuit board, the main circuit board is arranged outside the positive electrode, and the secondary circuit board is arranged between the main circuit board and the positive electrode of the battery cell group; the first nickel strap is connected to the positive electrode of the secondary circuit board; the secondary circuit board is fastened and connected with the main circuit board through a fastening structure.

Optionally, the fastening structure includes a bolt disposed on the secondary circuit board and a nut disposed on the primary circuit board, and the bolt is fastened to the nut.

Optionally, a bump structure is arranged on the inner wall of the battery cell frame, a groove structure is arranged on the secondary circuit board, the secondary circuit board is arranged in the battery cell frame, and the bump structure is embedded in the groove structure.

Optionally, the assembled battery device further comprises a second nickel strap, one end of the second nickel strap is connected with the negative electrode of the battery cell group, and the other end of the second nickel strap is connected with the negative electrode of the circuit board.

Optionally, a USB interface is further disposed on the circuit board, and an alignment hole is disposed on the battery case correspondingly.

Optionally, one end of the battery case is provided with an opening, and the battery case is used for loading the battery cell group into the battery case from the opening, and a surface pad is provided for covering the opening, so that the battery cell group is sealed in the battery case.

Optionally, a nickel strap hole is formed in the first cushion layer, and the first nickel strap penetrates through the nickel strap hole to be connected with the secondary circuit board.

Optionally, an insulating second cushion layer is sleeved on the nut of the main circuit board, and a spring is sleeved on the second cushion layer and is used for elastically supporting the main circuit board, the auxiliary circuit board and the negative electrode to be connected.

Optionally, the bottom of the battery case is provided with an opening structure, and the opening structure is provided with a retainer ring for supporting the battery cell group.

In the combined battery device, a user can set the number of the battery cores in the battery shell according to the needs; the large-capacity battery product with a new style is assembled with low cost transitionally by utilizing the existing mature industrial system by arranging a large number of current low-cost mature type battery cells in the newly designed large-capacity battery shell, and has the advantages of rapidness, practicability and high efficiency in industry; the present application provides an assembly mechanical structure of a cell stack and an off-the-shelf management circuit board, which is designed and manufactured at a far lower cost than a completely manufactured product of a completely new individual cell, forming a transitional alternative product solution. In the case that the new battery demand is not high enough, the market supply by using the existing type of battery cells can be maintained all the time.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

fig. 1 is a structural view of a assembled battery device of the present utility model;

FIG. 2 is a cross-sectional view of a assembled battery device of the present utility model;

FIG. 3 is another visual block diagram of the assembled battery device of the present utility model;

FIG. 4 is a block diagram of a bump structure and a recess structure of the present utility model;

fig. 5 is an assembly diagram of a bump structure and a groove structure according to the present utility model.

Wherein the reference numerals are as follows: 1-battery case, 2-electric core group, 3-independent electric core, 4-circuit board, 5-main circuit board, 6-secondary circuit board, 7-first nickel strap, 8-second nickel strap, 9-USB interface, 10-electric core frame, 11-first cushion, 12-second cushion, 13-paster, 14-riser, 15-bolt, 16-nut, 17-support column, 18-face pad, 19-spring, 20-negative film, 21-bump structure, 22-recess structure.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

As shown in fig. 1, in a preferred embodiment of a novel assembled battery device according to an embodiment of the present utility model, the novel assembled battery device includes: the battery case 1 adopts a new battery size, for example 4680, which is a larger new battery model size, and the material of the battery case may be a metal material or an insulating material, when the battery case adopts the metal material, the battery case itself may be used as a conductive material of the negative electrode, and when the battery case adopts the insulating material, for example, a hard plastic, a guiding structure of the negative electrode, for example, a nickel strap, is required to be additionally arranged.

The battery cell group 2 is arranged in the battery shell 1, and the battery cell group 2 comprises a plurality of independent battery cells 3 which are connected in parallel or in series; the independent battery cell 3 adopts the products which are common and mature in market shaping at present, such as model 1865 or 2170, the manufacturing cost is extremely low, a large number of products are formed in the market, and the productivity is abundant. For convenient assembly, the independent battery cells 3 are arranged and assembled on a bracket, namely a battery cell frame 10, and corresponding accommodating cavity grooves which are arranged side by side and are used for accommodating each corresponding independent battery cell 3 are arranged on the battery cell frame 10. In particular, but not limited to, examples, two or three cells may be used, corresponding to different capacity values when capacities are noted on the outside of the product. The cell holder 10 may be provided as a plastic holder.

A first cushion layer 11 is arranged at the end of the cell frame 10, is in a polygonal or abnormal block shape, can be made of insulating materials such as rubber or foaming glue, and plays the roles of supporting the circuit board 4 and fixing each independent cell 3 and the first nickel strap 7. The realization of the cell holders 10 can also be provided in particular cases as corresponding longitudinal strips or bead support bars in the battery case 1, so that individual cells can be fitted into the battery case 1 for fixing, respectively, with reference to fig. 2.

Corresponding connection structures for the series or parallel connection of the individual cells 3, such as nickel strips or circuit boards, wires, etc., can be provided on the cell holder 10, and care must be taken to avoid insulation problems between the lines and unnecessary connection of the lines to external circuits while the individual cells 3 are connected in series or parallel. In the preferred embodiment of the assembled battery device of the present utility model, the parallel connection is a more convenient and simple arrangement scheme, while the serial connection needs to consider the placement direction of the positive and negative electrodes of the independent battery cells 3 and the wiring of the serial connection, and the structure is slightly complex.

In the preferred embodiment of the assembled battery device of the present utility model, after the individual cells are arranged in series or parallel, a corresponding management circuit is required to form a complete battery device, rather than just the cells, which are the raw materials for processing or assembling batteries or large batteries such as batteries of electric vehicles. The management circuit of the present utility model is arranged to form a circuit board 4, as shown in fig. 1, disposed at the positive electrode end in the battery case 1, outside the first cushion layer 11. Preferably, the first pad layer 11 is provided in a shape in which a channel for the nickel strap to pass through is provided to fix and connect the nickel strap of the external electrode of the independent cell to the circuit board 4 to which the first pad layer 11 is connected.

In a specific embodiment, the nickel strap may include a first nickel strap 7, a second nickel strap 8, and the like. One end of the first nickel strap 7 is connected with the output positive electrode of the battery cell group 2 (the inside of the battery cell group 2 is connected in series or in parallel through an internal circuit), and the other end of the first nickel strap 7 is connected with the positive electrode of the circuit board 4. In the parallel connection case, two or three nickel straps 7 may be provided, corresponding to the number of the independent battery cells 3, and connected to each corresponding independent battery cell 3 after passing through the first cushion layer 11 respectively or after being connected, and connected and output to the circuit board 4.

One end of the second nickel strap 8 is connected to the negative electrode of the cell group 2, in particular, may be directly connected to the outer side wall of the cell group 2, and the other end of the second nickel strap 8 is connected to the negative electrode end of the circuit board 4, so that the second nickel strap 8 and the first nickel strap 7 together form an operating circuit and an output circuit of the circuit board 4.

In a further embodiment, a USB interface 9 may be further disposed at a corresponding position of the battery case 1 of the battery and on the circuit board 4, where a corresponding opening is disposed on the battery case 1, and the interface body is connected and fixed to extend outwards from the circuit board 4, so as to connect to a charging device according to the management circuit capability on the circuit board 4 for charging inwards, or connect to an electric device for discharging outwards. The battery case 1 is provided with a USB alignment hole, and the USB interface 9 is assembled in the USB alignment hole.

In the preferred embodiment of the present utility model, a battery case 1 is designed, and the number of the individual cells 3 disposed in the battery case 1 can be determined according to the capacity of the internal space, for example, two, three or more; in a specific embodiment, the battery case 1 may be 4680 models, and by disposing a corresponding number of independent battery cells 3 in the battery case 1, such as 1865 or 2170, since the independent battery cells are common models which are produced in a mass production manner at a low cost, the industrial manufacturing cost is low, and thus, a new type of high-capacity battery product can be assembled at a low cost, and a new battery product in a transition market period can be realized by only raising a small amount of mechanical manufacturing cost before the new battery product is demanded in a mass market and the industrial manufacturing cost is reduced to a certain extent.

In addition, the plurality of independent battery cells 3 disposed in the battery case 1 may be disposed in parallel with each other, or may be disposed in series in sequence, for example, in fig. 1, three independent battery cells 3 are disposed in parallel with each other, and then the plurality of independent battery cells are attached to the battery cell group by the first nickel strap 7 to form a parallel connection; or three independent battery cores 3 are sequentially arranged front and back to form a series connection mode of linear arrangement; or three independent electric cores 3 are still connected in parallel as shown in fig. 1, and then the front end and the rear end of different independent electric cores are connected by nickel belts to form a series connection mode, for example, one end of each nickel belt is connected with one end of one independent electric core 3, and the other end of each nickel belt is connected with one end of the other independent electric core 3. The arrangement of the plurality of independent battery cells 3 enables the whole battery cell group 2 to release higher voltage so as to meet the use requirement of a user on a high-capacity battery.

In some embodiments, the assembled battery device of the utility model comprises a cell rack 10 made of insulating material, wherein the cell rack 10 is used for placing the cell group 2 and is used as a mounting part for placing the independent cells 3; the cell holders 10 may have different specifications, for example, cell holders 10 in which three individual cells 3 can be placed, or cell holders 10 in which more than three individual cells 3 can be placed. The user selects the individual battery cells 3 of the corresponding model and the required number according to design requirements, and then assembles the assembled battery device.

In assembly, for example, a cell holder 10 to which three individual cells 3 can be mounted is selected, three individual cells 3 are placed in the cell holder 10, and then the cell holder 10 is assembled into the battery case 1. The battery case 1 is made of stainless steel and may be provided in a cylindrical shape. The cylindrical battery case 1 can avoid the serious collision of edges and corners on other objects; the battery cell frame 10 is matched with the shape of the battery shell 1 and is arranged to be cylindrical, and the installation parts matched with the three cylindrical independent battery cells 3 are arranged in the cylindrical shape, so that the installation parts have a certain limiting effect on the independent battery cells 3, and the independent battery cells 3 are convenient to assemble.

In some embodiments, the first pad layer 11 disposed on the cell group 2 is made of an insulating material, takes a shape of a Chinese character 'mi', and has a certain thickness. In this embodiment, the first nickel strap 7 is attached to the positive electrode of the battery cell group 2, and then the first pad layer 11 is provided with a nickel strap hole through which the first nickel strap 7 passes, and the first nickel strap 7 passes through the nickel strap hole on the first pad layer 11 and is connected to the circuit board 4. The first nickel strap 7 includes a patch 13 and a vertical piece 14 in a certain angle relation with the patch 13, for example, the vertical piece is generally vertical, the patch 13 is attached to and electrically connected to the positive electrode of the battery cell group 2, the first cushion layer 11 is pressed on the patch 13, and the vertical piece 14 is connected with the circuit board 4 through a nickel strap through hole of the first cushion layer 11, so as to realize positive electrode connection. The setting of first bed course 11 plays the effect of supporting circuit board 4, and first bed course 11 sets up to the insulator, can avoid the conductive interference to circuit board 4, is favorable to safety protection.

In some embodiments, the circuit board 4 may also be a double-layer circuit board, that is, as shown in fig. 2, it includes a main circuit board 5 and a secondary circuit board 6, which may be connected by a stronger bolt. The main circuit board 5 and the secondary circuit board 6 may have different circuit functions, for example, a charge and discharge management unit with more heat dissipation may be disposed on the secondary circuit board 6, i.e., an inner circuit board. Specifically, a nut 16 may be fixed on the inner side of the main circuit board 5, and a bolt 15 for fixedly connecting the adapting nut 16 is arranged on the auxiliary circuit board 6, and the bolt 15 is fastened and connected with the nut 16, so that the main circuit board 5 is fixedly connected with the auxiliary circuit board 6, and the effect of the fixed connection is very stable.

The double-layer circuit board is arranged in a mode that a heating circuit module in a working circuit such as a charge-discharge conversion unit, a voltage regulation control unit and the like can be independently placed on one circuit board for convenience, heat conduction on the side circuit board is enhanced, and the circuit module with less heating is arranged on the other side circuit board, so that the circuit module can be differentiated, the circuit module is modularized, the circuit board which is easy to damage is convenient to maintain and replace, and the heat dissipation capability can be enhanced on the circuit board bearing the heating module, for example, more heat dissipation glue is provided for heat conduction connection with the outer wall of a battery. In the preferred embodiment of the present utility model, the heat generating module may be disposed on the inner secondary circuit board 6, because the secondary circuit board 6 is closer to the battery cell group 2, and may be thermally connected to the outer side of the battery cell by using various heat conducting materials such as heat conducting glue to dissipate heat, while the main circuit board 5 is limited to the positive output of the front end of the whole battery, and needs protection and impact resistance, so that the heat dissipation capability of the front end of the whole battery cannot be better due to mechanical reinforcement.

In some embodiments, the bump structure 21 is disposed on the cell frame, the groove structure 22 is disposed on the secondary circuit board 6, the bump structure 21 and the groove structure 22 are aligned, so that the secondary circuit board 6 is mounted in the cell frame 10, and the bump structure 21 is embedded in the groove structure 22. The mating connection of the bump structure 21 and the groove structure 22 positions the sub-circuit board 6 in the circumferential direction, avoiding the sub-circuit board 6 from rotating in the circumferential direction, see fig. 4 and 5.

Specifically, USB interface 9 and main circuit board 5 electric connection, first nickel strap 7 is connected with the anodal of vice circuit board 6, and first nickel strap 7 welding is on vice circuit board 6, and the other end of first nickel strap 7 is connected with electric core group 2 positive pole, and second nickel strap 8 is connected with the negative level of vice circuit board 6, and the second nickel strap 8 other end is connected with the negative level of electric core group 2, when electronic equipment needs the electricity or charges, then is connected to the battery assembly device of this application with electronic equipment through USB interface 9 and gets the electricity.

In some embodiments, one end of the battery case 1 is provided with an opening, the battery cell group 2 is installed in the battery case 1 from the opening of the battery case 1, and the battery cell group 2 is sealed in the battery case 1 by covering the opening through the surface pad 18; the bottom of the battery case 1 is also provided with an opening structure, the diameter of the opening structure is smaller than the inner diameter of the battery case 1, namely, the bottom of the battery case 1 is provided with an opening, but the opening is a structure which is not completely opened, and a check ring wall is used for supporting the battery cell group 2; after the battery cell group 2 is placed in the battery cell frame 10, the battery cell frame 10 is assembled in the battery shell 1, and the check ring at the bottom of the battery shell 1 blocks the battery cell frame 10, so that the battery cell frame 10 is prevented from sliding out from the bottom of the battery shell 1, the battery cell frame 10 is conveniently taken out due to the arrangement of the opening at the bottom of the battery shell 1, namely, the battery cell frame 10 can be pushed out from the battery shell 1 by applying force from the bottom of the battery shell 1; a bottom plate 20 made of stainless steel is arranged at the bottom of the battery case 1, and an opening at the bottom of the battery case 1 is sealed to protect the inside of the battery case 1. Corresponding chute openings can be arranged on the battery cell frame 10, and corresponding blocking walls are arranged on the inner side wall of the battery shell 1, so that the battery cell frame 10 can be conveniently moved in and out.

In some embodiments, the patch 13 is provided with a number of vertical pieces 14 corresponding to the number of independent cells 3, each vertical piece 14 being connected to the main circuit board 5 through a nickel strap hole and the secondary circuit board 6; the nickel strap holes of the first cushion layer 11 are arranged with edges corresponding to the number of the vertical plates 14, for example, in the embodiment, the vertical plates 14 are arranged into three plates, then the nickel strap holes of the first cushion layer 11 are arranged into a hexagon, and each edge of each vertical plate 14, which is close to the nickel strap hole, passes through the secondary circuit board 6 and is connected to the primary circuit board 5; the vertical plates 14 of the first nickel strap 7 are arranged corresponding to the number of the independent battery cells 3, so that the connection between the battery cell group 2 and the circuit board 4 is facilitated, and the conduction of current can be increased; the upright plates 14 are closely attached to the edges of the nickel strap holes, which is beneficial to limit and guide the upright plates 14.

The first cushion layer 11 is provided with nickel strap holes, which may be configured as an inner hexagon as shown in fig. 1, or may be configured in other structures or shapes, such as through holes with the number of holes being matched with that of the vertical plates 14, and positions and shapes of the three through holes are matched with that of the vertical plates 14, so that the vertical plates 14 can pass through the through holes.

In some embodiments, the nut 16 of the main circuit board 5 is sleeved with an insulating second cushion layer 12, and the second cushion layer is sleeved with a spring 19 for supporting and connecting the negative electrode, as shown in fig. 3; the arrangement of the spring 19 structure can increase the elastic connection between the main circuit board 5 and the auxiliary circuit board 6, further strengthen the reliable connection between the circuit boards and between the circuit board 4 and the battery cell group 2, and avoid the damage possibly caused by hard impact between the circuit boards when encountering collision. The second pad layer 12 can block the conduction between the nut 16 and the spring 19, avoiding affecting the conduction between the main circuit board 5 and the secondary circuit board 6, see fig. 2 and 3. The assembly mode of the spiral spring is adopted instead of the common nickel strap connecting the negative electrode connection between the main circuit board and the auxiliary circuit board, and is convenient for automatic machine assembly and improves the assembly efficiency when the common spiral spring and the second cushion layer are adopted and the nut and bolt connection mode is adopted in the assembly process of the combined battery device.

In some embodiments, between two layers of circuit boards (the main circuit board 5 and the secondary circuit board 6), for convenience of supporting and fixing, at least one supporting column 17, and preferably a plurality of, for example three, is arranged on the main circuit board 5, for the main circuit board 5 to be assembled on the secondary circuit board 6, and the supporting column 17 abuts against the main circuit board 5 and the secondary circuit board 6, and generally adopts an insulating column structure; the support columns 17 are uniformly distributed along the circumference of the main circuit board 5, and the support columns 17 can provide supporting force for the main circuit board 5.

The assembled battery device of the present application will be described by way of specific examples:

for example, for a 46800 lithium battery, the last "0" represents a cylindrical battery in terms of a battery diameter of 46mm and a height of 80 mm; in the current network data disclosure, the battery can improve the single energy by 5 times, the charge and discharge power by 6 times and the endurance mileage by 16%; compared with the existing lithium battery, the lithium battery has the advantages of lower cost, higher energy density and higher upper limit of charge and discharge power, but in any case, the existing industrial manufacturing system has high manufacturing cost for single batteries until market demands are popularized to a certain extent; according to the calculation, the energy density of the 46800 lithium battery is about 283Wh/kg (the energy density of the battery weight=the battery capacity×the voltage/weight of a discharging platform, and the basic unit is Wh/kg); considering other technical improvements, the total capacity of the 46800 cell 3 should be up to 30Ah; the energy density can reach 300Wh/kg, and the market demand is basically satisfied.

As a new technology, the technology for directly producing 46800 lithium batteries at home is still immature, and the cost of single-particle assembly is high; however, the use of the battery is required in the market at present; therefore, the combined battery device can meet and transitionally meet the market demand, and when the production cost of single battery is reduced to a low enough degree in the later period, for example, the cost of the assembled battery is lower than that of the assembled battery, the processing and manufacturing mode of the single battery can be adopted.

In this embodiment, a 46800 battery model housing is used; namely, the battery case 1 is set to the specification of 46800 battery, then three 21700 battery cells 3 are put into the battery case 1, and then the face pad 18 is covered at the opening of the battery case 1 to complete the assembly of the 21700 battery cells 3; after the three 21700 battery cores 3 are assembled, a complete battery product is formed, the electric quantity which can be released is larger than that of a single 21700 battery core 3, and the use requirement of a user on large electric quantity can be met.

The user can also select the battery device with the USB interface, and can take electricity from the assembled large battery when the electric product is directly connected with the USB structure, so that the electric device is convenient to use.

The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model.

Claims

1. A battery pack device, comprising:

a battery case of 4680 model size;

the battery cell group is arranged and is pressed against the battery shell side by side and comprises a plurality of independent battery cells which are connected in parallel or in series;

a circuit board disposed at an end of the positive electrode in the battery case;

a battery cell frame is arranged in the battery shell and used for fixing the independent battery cells in parallel;

a first nickel strap is arranged at the positive electrode of the battery cell group, and one end, far away from the battery cell group, of the first nickel strap is connected with the positive electrode of the circuit board;

2. The assembled battery device according to claim 1, wherein the circuit board comprises a main circuit board and a sub circuit board, the main circuit board is arranged outside the positive electrode, and the sub circuit board is arranged between the main circuit board and the positive electrode of the battery cell group; the first nickel strap is connected to the positive electrode of the secondary circuit board; the secondary circuit board is in fastening connection with the main circuit board through a fastening structure.

3. The assembled battery apparatus according to claim 2, wherein the fastening structure includes a bolt provided on the sub-circuit board and a nut provided on the main circuit board, the bolt being fastened to the nut.

4. The assembled battery device according to claim 2, wherein a bump structure is provided on an inner wall of the cell frame, a groove structure is provided on the secondary circuit board, the secondary circuit board is mounted in the cell frame, and the bump structure is embedded in the groove structure.

5. The assembled battery device according to claim 3, further comprising a second nickel strap, wherein one end of the second nickel strap is connected to the cell stack negative electrode and the other end is connected to the circuit board negative electrode.

6. The assembled battery device according to claim 5, wherein a USB interface is further provided on the circuit board, and an alignment hole is provided on the battery case.

7. The assembled battery device according to claim 6, wherein one end of the battery case is provided with an opening for loading the battery cell assembly into the battery case from the opening, and a face pad is provided for covering the opening to enclose the battery cell assembly in the battery case.

8. The assembled battery apparatus of claim 7, wherein the first cushion layer is provided with a nickel strap hole, and the first nickel strap is connected to the secondary circuit board through the nickel strap hole.

9. The assembled battery device according to claim 8, wherein an insulating second cushion layer is sleeved on the nut of the main circuit board, and a spring is sleeved on the second cushion layer, and the spring is used for elastically supporting the main circuit board, the auxiliary circuit board and the negative electrode.

10. The assembled battery apparatus of claim 9, wherein the battery case bottom is provided with an opening structure provided with a retainer ring for supporting the battery cell group.