A battery box assembly

Abstract

The present invention discloses a battery box assembly, including parallel battery cells, the parallel battery cells are connected in series to form a loop, the parallel battery cells are arranged in an array to form a rectangular battery box assembly, the parallel battery cells include a plurality of batteries connected in parallel, each battery in the parallel battery cells has a battery core and an electrolyte wrapped by a container around the periphery of the battery core. In the battery box assembly of the present invention, a plurality of parallel battery cells are connected in series to form a loop, and a plurality of parallel battery cells are connected in an array to form a rectangular parallelepiped. The series-parallel arrangement of the metal sheet and the battery core makes the loop structure compact, and the negative pole socket and the positive pole socket are arranged on the same side of the battery box assembly, so that the positive and negative pole sockets are arranged on the same plane, simplifying the structure of the conductive bar and the box body, and facilitating user use.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery box assemblies, and in particular relates to a battery box assembly for a new energy vehicle. Background Art

[0002] A pure electric vehicle is a vehicle that uses a single battery as a power source for energy storage. It uses the battery as a power source for energy storage, provides electrical energy to the motor through the battery, drives the motor to operate, and thus propels the vehicle. The components of an electric vehicle include an electric drive and control system, mechanical systems such as drive force transmission, and working devices that complete a given task. The electric drive and control system is the core of an electric vehicle, and is also the biggest difference from an internal combustion engine vehicle.

[0003] When driving a car, multiple batteries are needed to ensure power, and multiple batteries need to be assembled to form a battery box assembly. In existing battery box assemblies, the arrangement of battery packs is not optimized, resulting in a bulky battery box assembly structure and a complex circuit structure, which is inconvenient to use and occasionally causes short circuit accidents. Summary of the invention

[0004] In order to solve the above problems in the prior art, the present invention provides a battery box assembly, which has a simple structure and a simple circuit structure, thereby optimizing the circuit structure of the battery box and facilitating use.

[0005] To achieve the above objectives, the technical solution of the battery box assembly of the present invention is as follows:

[0006] A battery box assembly includes parallel battery cells, which are connected in series to form a loop. The parallel battery cells are arranged in an array to form a rectangular battery box assembly. The parallel battery cells include a plurality of batteries connected in parallel to each other. Each battery connected in parallel in the parallel battery cells has a battery core and an electrolyte wrapped in a container around the outer periphery of the battery core.

[0007] Furthermore, the parallel battery unit comprises 2, 3, 4, 5 or 6 batteries connected in parallel, and the positive poles of each battery or battery cell in the parallel battery unit are on the same side.

[0008] Furthermore, metal sheets are connected to both sides of the parallel battery unit, and a plurality of batteries in the parallel battery unit are fixed and connected in parallel via the metal sheets, and mounting grooves for connecting battery cells are formed on the metal sheets.

[0009] Furthermore, the same metal sheet is connected to the positive side of one parallel battery cell and the negative side of another parallel battery cell, thereby realizing the series connection between adjacent parallel battery cells; multiple parallel battery cells are respectively connected through metal sheets to realize the series connection between multiple parallel battery cells.

[0010] Furthermore, the battery box assembly includes a first array group and a second array group, the first array group and the second array group are arranged opposite to each other, the first end of the first array group has a first end parallel battery cell, the negative pole of the first end parallel battery cell is connected to the negative socket, thereby forming a negative output port of the battery box assembly; the first end of the second array group has a second end parallel battery cell, the positive pole of the second end parallel battery cell is connected to the positive socket, thereby forming a positive output port of the battery box assembly.

[0011] Furthermore, the positive output port and the negative output port are arranged on the same side of the battery box assembly.

[0012] Furthermore, metal sheets are arranged on both sides of the first array group and the second array group, and the metal sheets on the outer sides of the first array group and the second array group are arranged in a ring shape, and a printed circuit board is arranged on the inner side of the ring-shaped metal sheet, and the printed circuit board is connected to the ring-shaped metal sheet to detect the metal sheets on the mounting surfaces of the outer sides of the first array group and the second array group.

[0013] Furthermore, collection points are arranged on the inner edge of the annular metal sheet, and the collection points are evenly arranged on the inner edge of the annular metal sheet. The printed circuit board is connected to the annular metal sheet through the collection points.

[0014] Furthermore, the distance between the metal sheets on the outer side of the battery box assembly is 15mm-25mm.

[0015] Furthermore, a battery box bracket is provided in the battery box assembly, and the battery cells are embedded in the upper limit of the battery box bracket and fixed.

[0016] In the battery box assembly of the present invention, multiple parallel battery cells are connected in series to form a loop, and multiple parallel battery cells are connected in an array to form a rectangular parallelepiped shape. The series-parallel arrangement of the metal sheet and the battery cell makes the loop structure compact, and the negative pole socket and the positive pole socket are arranged on the same side of the battery box assembly, so that the positive and negative pole sockets are arranged on the same plane, simplifying the structure of the conductive bar and the box body and making it convenient for users to use. It is only necessary to install a printed circuit board collection and installation point corresponding to the position of the riveted nut of the annular conductive bar, so that all metal sheets on a mounting surface can be detected, making the box body structure simpler, realizing one object with multiple forms, reducing the types and quantities of materials used in the battery box assembly, and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Hereinafter, the present invention will be described in more detail based on embodiments and with reference to the accompanying drawings.

[0018] Figure 1 It is a schematic diagram of the exploded structure of the battery box assembly of the present invention;

[0019] Figure 2 It is a schematic diagram of the assembly structure of the battery box assembly of the present invention;

[0020] Figure 3-Figure 4 It is a schematic diagram of the exploded structure of the battery box assembly of the present invention;

[0021] Figure 5 It is a schematic structural diagram of the positive electrode output port in the battery box assembly of the present invention;

[0022] Figure 6 It is a schematic structural diagram of the negative electrode output port of the battery box assembly of the present invention;

[0023] Figure 7 A polarity diagram of a first side of a battery box assembly of the present invention;

[0024] Figure 8 It is a polarity diagram of the second side of the battery box assembly of the present invention. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below with reference to the accompanying drawings.

[0026] like Figure 1-Figure 8 As shown, the battery box assembly of the present invention is composed of parallel battery cells, and the parallel battery cells are connected in series to form a rectangular battery box assembly. The parallel battery cells include a plurality of batteries connected in parallel, such as 2, 3, 4, 5 or 6 batteries connected in parallel to form a parallel battery cell, and the parallel battery cells are connected in series to form a loop. Each battery connected in parallel in the parallel battery cell has a battery cell 7 and an electrolyte wrapped by a container around the outer periphery of the battery cell 7. The plurality of batteries connected in parallel in the parallel battery cell refers to the battery cells 7 in the plurality of batteries being connected in parallel to form a parallel battery cell.

[0027] The positive poles of each battery or battery cell 7 in the parallel battery unit are on the same side, thus meeting the parallel requirements. The parallel battery units are fixed and connected in parallel by metal sheets, which may be aluminum sheets, and on which mounting grooves are formed, and the mounting grooves are used to mount each battery in the parallel battery unit. For example, the mounting grooves are connected to the battery cells 7 of each battery in the parallel battery unit to achieve fixation, and the conductivity of the metal sheets enables the batteries in the parallel battery unit to be connected in parallel.

[0028] The battery box assembly includes two array groups, namely, a first array group and a second array group. The first array group is arranged opposite to the second array group, and a plurality of parallel battery cells are connected in series along the first array group and the second array group to form a loop. The first end of the first array group has a first end parallel battery cell, and the negative electrode of the first end parallel battery cell is connected to the negative electrode socket, thereby forming a negative electrode output port 30 of the battery box assembly. The first end of the second array group has a second end parallel battery cell, and the positive electrode of the second end parallel battery cell is connected to the positive electrode socket, thereby forming a positive electrode output port 20 of the battery box assembly.

[0029] The following is an example of a parallel battery unit with three parallel cells 7 or three parallel batteries. The case of 2, 4, 5 or 6 parallel cells 7 or batteries is similar. It is only necessary to replace the three parallel cells 7 in the parallel battery unit with 2, 4, 5 or 6 parallel cells 7, and the rest is consistent with the present embodiment.

[0030] Figure 6 The figure shows a parallel battery unit formed by three battery cells 7 connected in parallel, wherein the positive electrodes of the parallel battery units are on the same side and the negative electrodes are on the same side. The parallel battery units are connected in parallel, and the parallel battery units are connected in series. The parallel battery units are arranged in series to form an array, thereby forming a rectangular battery box assembly.

[0031] like Figure 1-Figure 4 As shown, the battery box assembly includes two array groups, namely, a first array group and a second array group. The first array group is arranged opposite to the second array group. The first end of the first array group has a first end parallel battery unit, and the negative electrode of the first end parallel battery unit is connected to the negative electrode socket, thereby forming a negative electrode output port 30 of the battery box assembly. The first end of the second array group has a second end parallel battery unit, and the positive electrode of the second end parallel battery unit is connected to the positive electrode socket, thereby forming a positive electrode output port 20 of the battery box assembly.

[0032] The positive output port 20 and the negative output port 30 are arranged on the same side of the battery box assembly, and the negative socket, the positive socket, and the positive lead metal sheet (such as Figure 1 As shown, the positive electrode lead metal sheet is connected to the parallel metal sheet 10), the negative electrode lead metal sheet (as shown Figure 1 As shown, the negative electrode lead-out metal sheet is connected to the parallel metal sheet 9) and is arranged on the same side of the battery box assembly and has the same outlet direction, so that the battery box assembly has a compact structural design, high space utilization, and a smaller overall size of the battery box assembly.

[0033] The negative electrode of the battery cell 7 or the positive electrode of the battery cell 7 of the parallel battery unit is assembled with the metal sheet 1 to achieve parallel connection and fixation. The metal sheet is simultaneously connected to the positive electrode side of a parallel battery unit and the negative electrode side of another parallel battery unit, thereby realizing the series connection between adjacent parallel battery units, and multiple parallel battery units are respectively connected through the metal sheet to form a series connection between multiple parallel battery units. After the metal sheet 2 is connected to the positive electrode of a parallel battery unit (to realize the parallel connection of the positive electrode of the parallel battery unit), the metal sheet 2 is also connected to the negative electrode of another parallel battery unit (to realize the parallel connection of the negative electrode of the other parallel battery unit), so that a metal sheet can connect the three battery cells 7 in a parallel battery unit in parallel while connecting two parallel battery units in series.

[0034] like Figure 1 As shown, the metal sheet in the battery box assembly and the parallel battery cells connected thereto are configured as follows Figure 1 As shown, when the power is turned on, the current flows from the positive high voltage connector into a universal metal sheet 16, a parallel metal sheet 2 (the parallel metal sheet refers to the metal sheet used in the parallel battery unit), 7 (or odd-numbered) parallel metal sheets 4, 1 parallel metal sheet 12, 3 (or odd-numbered) parallel metal sheets 8, and 1 parallel metal sheet 10 (the parallel metal sheet 10 is connected to the positive lead-out metal sheet), and then flows out through a universal metal sheet 17, a universal metal sheet 19 (the universal metal sheet 1 9 connects the parallel metal sheet 9 with the parallel metal sheet 10), 1 universal metal sheet 18, 1 parallel metal sheet 9 (the parallel metal sheet 9 is connected to the negative lead-out metal sheet), 3 (or odd-numbered) parallel metal sheets 8, 1 parallel metal sheet 11, 7 (or odd-numbered) parallel metal sheets 3, 1 parallel metal sheet 1, 1 universal metal sheet 15, and finally flows out through the negative high-voltage connector, thereby realizing 72 battery cells connected in series to form a battery circuit that connects parallel battery cells in series. For example, a single battery with a voltage of 2.3V and a capacity of 40AH is used. After being connected in parallel and then in series, the battery box assembly has a capacity of 120AH and can output a voltage of 55.2V. The battery polarity on the side of the battery box assembly is as follows: Figure 7 and Figure 8 shown.

[0035] like Figure 1 As shown, the lines in the battery box assembly represent the battery cells 7, and three adjacent battery cells 7 on the same metal sheet represent three battery cells 7 connected in parallel, and then the parallel battery units are connected by a metal sheet with six mounting slots or mounting holes. The metal sheet acts as a conductor, and the metal sheet and the battery cell 7 are connected and fixed by nuts. The metal sheet uses the battery cell 7 as a bridge to achieve current communication, and the metal sheet and the battery cell 7 are fixed by nuts.

[0036] In the first array group and the second array group of the battery box assembly, metal sheets are arranged on both sides of each array group, and the parallel battery units are connected between the metal sheets on both sides. A battery box bracket is arranged in the battery box assembly, and the battery cell 7 is directly embedded in the battery box bracket for position fixing, so as to realize the current connection between the battery cell 7 and the metal sheets at both ends. The current realizes the normal operation of the entire battery module through this circuit.

[0037] The outer side of the first array group (the side opposite to the second array group is the inner side) is provided with a printed circuit board 5, the metal sheet on the outer side of the first array group is arranged in an annular manner, the printed circuit board 5 is arranged inside the metal sheet arranged in an annular manner, and the printed circuit board 5 is connected to the metal sheet arranged in an annular manner to detect the metal sheet on the mounting surface of the outer side of the first array group. Similarly, the outer side of the second array group is provided with a printed circuit board 5, the metal sheet on the outer side of the second array group is arranged in an annular manner, the printed circuit board 5 is arranged inside the metal sheet arranged in an annular manner, and the printed circuit board 5 is connected to the metal sheet arranged in an annular manner to detect the metal sheet on the mounting surface of the outer side of the second array group.

[0038] Therefore, this arrangement scheme only requires one printed circuit board 5 to detect all metal sheets on a mounting surface. At the same time, the outlet directions of the negative pole socket, the positive pole socket, the positive pole lead-out metal sheet, and the negative pole lead-out metal sheet are consistent, making the battery box assembly structure simple in design and having high space utilization.

[0039] A collection point 6 is provided on the inner edge of the ring-shaped metal sheet, and the printed circuit board 5 is connected to the ring-shaped metal sheet through the collection point 6. The collection points 6 are evenly arranged on the inner edge of the ring-shaped metal sheet, so that the printed circuit board 5 can collect data on the metal sheet more accurately, and it is also convenient to install the collected printed circuit board 5.

[0040] The multiple metal sheets on the side of the battery box assembly form a conductive row, which is arranged around the outer surface to form a ring-shaped conductive row. The distance between the metal sheets on the side of the battery box assembly is 15mm-25mm, preferably 19mm-24mm. Reducing the spacing is likely to cause the metal sheets to contact during the manual assembly process, thereby causing safety hazards such as short circuits. Too small a spacing will also put forward higher requirements or restrictions on the width of the printed circuit board 5, thereby increasing costs. Increasing the spacing between the metal sheets will reduce the effective current-carrying area of ​​the metal sheets (or conductive rows) and reduce the conductive performance of the metal sheets (or conductive rows).

[0041] The power components of electric vehicles need to be designed according to the working conditions, and the normal operation of the power battery is based on the correct arrangement of the conductive bars inside the box. Using a single 2.3V lithium titanate battery cell 7 with a capacity of 40AH, through the arrangement of the conductive bars, 72 batteries 7 are connected in series and parallel in the limited battery box assembly space, so that the battery box assembly can output a voltage of 55.2V.

[0042] The arrangement of the metal sheets in the battery box assembly of the present invention simplifies the box structure, requires fewer types of metal sheets, and simplifies the assembly process of the conductive row formed by the metal sheets.

[0043] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery box assembly, characterized in that: The parallel battery cells are connected in series to form a loop, and the parallel battery cells are arranged in an array to form a rectangular battery box assembly. The parallel battery cells include a plurality of batteries connected in parallel to each other, and each battery connected in parallel in the parallel battery cells has a battery core and an electrolyte wrapped by a container around the outer periphery of the battery core; Metal sheets are connected to both sides of the parallel battery unit, and multiple batteries in the parallel battery unit are fixed and connected in parallel through the metal sheets. The metal sheets are formed with mounting grooves for connecting battery cells; The metal sheet includes an intermediate metal sheet, the intermediate metal sheet is connected to the positive side of one parallel battery unit and the negative side of another parallel battery unit so as to realize the series connection between adjacent parallel battery units, the two parallel battery units connected to the intermediate metal sheet are located on the same side of the intermediate metal sheet, and the two parallel battery units connected to the intermediate metal sheet are connected to different metal sheets on the side away from the intermediate metal sheet; multiple parallel battery units are respectively connected through the intermediate metal sheet so as to connect the multiple parallel battery units in series; The battery box assembly includes a first array group and a second array group arranged along a first direction, the first direction is the extension direction of the battery, the first array group includes a plurality of parallel battery cells connected in series through the intermediate metal sheet, the second array group includes a plurality of parallel battery cells connected in series through the intermediate metal sheet, the first array group and the second array group are arranged opposite to each other, the first end of the first array group has a first end parallel battery cell, the negative electrode of the first end parallel battery cell is connected to the negative socket, thereby forming a negative output port of the battery box assembly; the first end of the second array group has a second end parallel battery cell, the positive electrode of the second end parallel battery cell is connected to the positive socket, thereby forming a positive output port of the battery box assembly; The parallel battery cells at the positive end of the first array group are first transition parallel battery cells, and the parallel battery cells at the negative end of the second array group are second transition parallel battery cells. The first transition parallel battery cells and the second transition parallel battery cells are connected in series via a metal sheet to connect the first array group and the second array group in series. Metal sheets for connecting the first array group and the second array group in series are arranged on both sides of the first array group and the second array group.

2. The battery box assembly according to claim 1, characterized in that: The parallel battery unit comprises 2, 3, 4, 5 or 6 batteries connected in parallel, and the positive poles of each battery or battery cell in the parallel battery unit are on the same side.

3. The battery box assembly according to claim 1, characterized in that: The positive output port and the negative output port are arranged on the same side of the battery box assembly.

4. The battery box assembly according to claim 1, characterized in that: The metal sheets on the outer sides of the first array group and the second array group are both arranged in an annular shape, and a printed circuit board is arranged inside the annular metal sheet. The printed circuit board is connected to the annular metal sheet to detect the metal sheets on the mounting surfaces on the outer sides of the first array group and the second array group.

5. The battery box assembly according to claim 4, characterized in that: The inner edge of the annular metal sheet is provided with collecting points, which are evenly arranged on the inner edge of the annular metal sheet, and the printed circuit board is connected to the annular metal sheet through the collecting points.

6. The battery box assembly according to claim 5, characterized in that: The distance between the metal sheets on the outer side of the battery box assembly is 15mm-25mm.

7. The battery box assembly according to claim 1, characterized in that: A battery box bracket is provided in the battery box assembly, and the battery cells are embedded in the upper limit of the battery box bracket and fixed.

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