Separated soft package battery module

Abstract

The utility model relates to the technical field of batteries, and discloses a separated soft package battery module. The soft package battery module comprises a box body, a battery cell module, a battery cell support, a first PCBA board and a second PCBA board, the box body comprises a shell, an upper cover and a side cover, the shell is provided with a conducting bar, a busbar and a reinforcing rib, the reinforcing rib is arranged on the side wall of the shell, the first PCBA board is embedded in a containing cavity of the shell, the upper cover seals the containing cavity of the shell, and the battery cell support is arranged on the side wall of the shell. The battery cell module is arranged on the battery cell support, the battery cell support is connected to an opening in the side face of the shell, the second PCBA board is arranged on the battery cell support, and the side cover is arranged at the opening of the shell, so that the shell is sealed. According to the soft package battery module disclosed by the utility model, the second PCBA board is electrically connected with the battery cell module, and voltage and temperature parameters of the battery cell module are acquired; the first PCBA board is electrically connected with the second PCBA board, signals from the second PCBA board are processed, and the battery module is simple in structure and has good anti-extrusion capacity.

Description

Technical Field

[0001] The embodiment of the utility model relates to the technical field of batteries, and particularly relates to a split soft-pack battery module. Background Art

[0002] At present, more and more automobiles adopt soft-pack batteries as starting power sources. Soft-pack batteries occupy an important position in the field of new energy vehicles by virtue of their advantages of light weight and high energy density.

[0003] The battery cells of soft-pack batteries are generally arranged in a shell, and the management and control board of the battery cells is electrically connected to an external client to realize various functions of the battery.

[0004] At present, the strength of the shell of the soft-pack battery is relatively low, which makes the soft-pack battery cells have the risk of short circuit caused by extrusion; and the components arranged on the shell are not convenient to assemble. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a split soft-pack battery module to solve the problems in the above background art.

[0006] The embodiment of the utility model provides a split soft-pack battery module, which includes: a box body, a battery cell module, a battery cell bracket, a first PCBA board and a second PCBA board;

[0007] The box body includes: a shell, an upper cover and a side cover;

[0008] The shell is provided with an integrally formed conductive row, a bus bar and a reinforcing rib. The reinforcing rib is arranged on the side wall of the shell and is used for enhancing the strength and anti-extrusion ability of the shell;

[0009] A receiving cavity is arranged at the top of the shell, and the first PCBA board is embedded in the receiving cavity and is electrically connected to the conductive row;

[0010] The upper cover is arranged on the shell and is used for sealing the receiving cavity;

[0011] An opening is arranged on one side of the shell. The battery cell module is arranged on the battery cell bracket and is located inside the shell. The battery cell bracket is connected to the opening of the shell, and the battery cell module is electrically connected to the bus bar;

[0012] The second PCBA board is arranged on the battery cell bracket and is electrically connected to the battery cell module, and the second PCBA board is electrically connected to the first PCBA board;

[0013] The side cover is arranged at the opening of the shell and is used for sealing the shell.

[0014] Based on the above solution, for the split soft-pack battery module of the present utility model, by providing a box body, a battery cell module, a battery cell bracket, a first PCBA board, and a second PCBA board, the box body includes: a housing, an upper cover, and a side cover. The housing is provided with an integrally formed conductive row, a bus bar, and a reinforcing rib. The first PCBA board is disposed in the accommodating cavity of the housing and is electrically connected to the conductive row. The upper cover seals the accommodating cavity of the housing. The battery cell module is disposed on the battery cell bracket, and the battery cell bracket is connected to the opening of the housing. The battery cell module is electrically connected to the bus bar. The second PCBA board is disposed on the battery cell bracket and is electrically connected to the battery cell module and the first PCBA board. The side cover seals the opening of the housing. For the split soft-pack battery module of the present utility model, the second PCBA board is disposed on the battery cell bracket and is electrically connected to the battery cell module. The second PCBA board collects parameters such as the voltage and temperature of the battery cell module. The first PCBA board is disposed in the accommodating cavity of the housing and is electrically connected to the second PCBA board. The first PCBA board is the hardware board of the battery module management system, processes signals from the second PCBA board, and realizes and controls various functions of the battery module. For this split soft-pack battery module, the side wall of the housing is provided with a reinforcing rib to enhance the strength and anti-extrusion ability of the housing and reduce the short-circuit risk. The first PCBA board is disposed in the accommodating cavity at the top of the housing and is separated from the battery cell module to prevent the pressure released after the thermal runaway of the battery cell from damaging the first PCBA board, so that the first PCBA board is better protected. Multiple components on the housing are integrally injection-molded with the housing as inserts, making the housing structure simple and facilitating the rapid assembly of other components in the future.

[0015] In a feasible solution, the housing is provided with a signal PIN pin and a communication PIN pin;

[0016] The first PCBA board is provided with a transfer row and a communication PIN pin hole. The transfer row is electrically connected to the conductive row, and the communication PIN pin is inserted into the communication PIN pin hole to electrically connect the communication PIN pin to the first PCBA board;

[0017] And the first PCBA board is electrically connected to the signal PIN pin;

[0018] The second PCBA board is provided with a signal PIN pin hole, the signal PIN pin is inserted into the signal PIN pin hole, and the second PCBA board is electrically connected to the signal PIN pin.

[0019] In a feasible solution, the battery cell module includes: a soft-pack battery cell, a foam, and an end plate;

[0020] The soft-pack battery cells and the foam are provided in plurality, and the plurality of soft-pack battery cells are stacked. Two end plates are respectively arranged at the top and bottom of the plurality of soft-pack battery cells, and the foam is laid between adjacent two soft-pack battery cells and between the end plate and the soft-pack battery cell;

[0021] One end of the soft-pack battery cell is provided with a tab, and the tab is used for electrically connecting with the bus bar and the second PCBA board.

[0022] In a feasible solution, the battery cell bracket includes: a frame body and a connecting copper bar;

[0023] The frame body is fixedly connected with the battery cell module and fixed on the housing;

[0024] The frame body is provided with a pore for the tab to pass through;

[0025] The connecting copper bar is arranged on the frame body, electrically connected with the bus bar and electrically connected with the tab.

[0026] In a feasible solution, the second PCBA board is provided with a connecting nickel sheet;

[0027] The connecting nickel sheet is electrically connected with the tab.

[0028] In a feasible solution, the conductive bar includes: a positive conductive bar and a negative conductive bar;

[0029] The positive conductive bar includes: a first conductive bar and a first connecting piece, and the first connecting piece is arranged on the first conductive bar;

[0030] The negative conductive bar includes: a second conductive bar and a second connecting piece, and the second connecting piece is arranged on the second conductive bar. The first connecting piece and the second connecting piece are used for connecting with the client;

[0031] The bus bar includes: a positive bus bar and a negative bus bar;

[0032] The positive bus bar includes: a third conductive bar and a first conductive stud, and the first conductive stud is arranged on the third conductive bar;

[0033] The negative bus bar includes: a fourth conductive bar and a second conductive stud, and the second conductive stud is arranged on the fourth conductive bar. The first conductive stud and the second conductive stud are used for electrically connecting with the connecting copper bar;

[0034] And the first connecting piece and the first conductive stud are located on one side of the housing, and the second connecting piece and the second conductive stud are located on the opposite side of the housing.

[0035] In a feasible solution, the housing is provided with a support frame at the bottom of the accommodation cavity;

[0036] The support frame is in a grid shape and is integrally formed with the housing, and the first PCBA board is embedded on the support frame.

[0037] In a feasible solution, sealant is provided between the first PCBA board and the upper cover, and between the battery cell bracket and the side cover.

[0038] In a feasible solution, a breather valve is provided on the side wall of the housing.

[0039] In a feasible solution, the materials of the housing, the upper cover and the side cover are plastics.

[0040] Compared with the prior art, the present utility model has the following beneficial effects:

[0041] 1. Reinforcing ribs are provided on the side wall of the housing to enhance the anti-extrusion ability of the housing and reduce the short-circuit risk caused by the extrusion deformation of the battery cell due to the housing.

[0042] 2. Multiple components on the housing are integrally injection-molded with the housing as inserts, making the housing structure simple and facilitating the assembly of other subsequent components.

[0043] 3. The first PCBA board is arranged in the accommodation cavity at the top of the housing and is separated from the battery cell module, and is electrically connected to the battery cell module through the second PCBA board. The pressure released after the thermal runaway of the battery cell will not damage the first PCBA board, so that the first PCBA board is better protected.

[0044] 4. The first connecting piece of the positive conductive bus and the first conductive stud of the positive busbar are located on one side of the housing, and the second connecting piece of the negative conductive bus and the second conductive stud of the negative busbar are located on the opposite side of the housing. The distance between the positive connecting piece and the negative connecting piece is relatively far, and the distance between the two reaches 30% of the total length of the corresponding side. The two will not easily come into contact to cause a short circuit of the battery cell, further reducing the short-circuit risk of the soft-pack battery cell when the housing is squeezed. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0046] Figure 1 It is a schematic diagram of the split soft-pack battery module in the embodiment of the present utility model;

[0047] Figure 2 Explosion schematic diagram of the split soft-pack battery module in the embodiment of the present utility model;

[0048] Figure 3 Schematic diagram of the housing in the embodiment of the present utility model;

[0049] Figure 4 Schematic diagram of the upper cover in the embodiment of the present utility model;

[0050] Figure 5 Schematic diagram of the battery cell module in the embodiment of the present utility model;

[0051] Figure 6 Schematic diagram of the battery cell bracket in the embodiment of the present utility model;

[0052] Figure 7 Schematic diagram of the first PCBA board in the embodiment of the present utility model;

[0053] Figure 8 Schematic diagram of the second PCBA board in the embodiment of the present utility model;

[0054] Figure 9 Another perspective schematic diagram of the housing in the embodiment of the present utility model.

[0055] Reference numerals in the figure:

[0056] 1, box body; 11, housing; 1101, reinforcing rib; 1111, positive conductive busbar; 11111, first conductive busbar; 11112, first connecting piece; 1112, negative conductive busbar; 11121, second conductive busbar; 11122, second connecting piece; 1121, positive busbar; 11211, third conductive busbar; 11212, first conductive stud; 1122, negative busbar; 11221, fourth conductive busbar; 11222, second conductive stud; 113, signal PIN pin; 114, communication PIN pin; 115, support frame; 116, breather valve; 12, upper cover; 121, glue groove; 13, side cover; 2, battery cell module; 21, soft-pack battery cell; 211, tab; 2111, positive tab; 2112, negative tab; 22, foam; 23, end plate; 3, battery cell bracket; 31, frame body; 32, connecting copper bar; 321, positive copper bar; 322, negative copper bar; 4, first PCBA board; 41, adapter bar; 42, communication PIN pin hole; 5, second PCBA board; 51, signal PIN pin hole; 52, connecting nickel sheet; 521, positive nickel sheet; 522, negative nickel sheet; 6, sealant. Detailed implementation manners

[0057] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0058] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0059] In the present utility model, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0060] The technical solutions of the present utility model will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

[0061] As described in the background art of the present application, the battery cells of a soft-pack battery are generally arranged in a housing and are electrically connected to an external client through a management control board to realize various functions of the battery.

[0062] The present application finds that currently, the strength of the housing of a soft-pack battery is relatively low, resulting in a risk that the soft-pack battery cells may be short-circuited due to extrusion; moreover, the structure of the housing is relatively complex, making it inconvenient to assemble various components.

[0063] To solve the above problems, the present application proposes the technical solutions of the present application, and the specific embodiments are as follows:

[0064] Figure 1Schematic diagram of the split soft-pack battery module in the embodiment of the present utility model. Figure 2 Explosion schematic diagram of the split soft-pack battery module in the embodiment of the present utility model. Figure 3 Schematic diagram of the housing in the embodiment of the present utility model. Figure 4 Schematic diagram of the upper cover in the embodiment of the present utility model. Figure 5 Schematic diagram of the battery cell module in the embodiment of the present utility model. Figure 6 Schematic diagram of the battery cell support in the embodiment of the present utility model. Figure 7 Schematic diagram of the first PCBA board in the embodiment of the present utility model. Figure 8 Schematic diagram of the second PCBA board in the embodiment of the present utility model. Figure 9 Another perspective schematic diagram of the housing in the embodiment of the present utility model.

[0065] As Figures 1 to 9 As shown, the split soft-pack battery module of this embodiment includes: a box body 1, a battery cell module 2, a battery cell support 3, a first PCBA board 4, and a second PCBA board 5.

[0066] The box body 1 includes: a housing 11, an upper cover 12, and a side cover 13.

[0067] A cavity is provided inside the housing 11, and a conductive busbar, a bus bar, and a reinforcing rib 1101 are provided on the housing 11.

[0068] The reinforcing rib 1101 can be in a grid shape and is provided on the side wall of the housing 11. It is integrally formed with the housing 11 during injection molding to increase the strength and anti-extrusion ability of the housing 11, so that the housing 11 is not easily deformed when being extruded.

[0069] The conductive busbar and the bus bar are provided on the housing 11 as inserts. They are embedded in the housing 11 during the injection molding of the housing 11 and are integrally formed with the housing 11 by injection molding to simplify the structure of the housing 11.

[0070] The conductive busbar includes: a positive conductive busbar 1111 and a negative conductive busbar 1112, and the bus bar includes: a positive bus bar 1121 and a negative bus bar 1122.

[0071] A receiving cavity is provided at the top of the housing 11. The first PCBA board 4 is embedded in the receiving cavity of the housing 11, and the first PCBA board 4 is electrically connected to the conductive busbar on the housing 11. The conductive busbar of the housing 11 is used for electrical connection with the client.

[0072] The upper cover 12 covers the receiving cavity of the housing 11 and is fixed to the housing 11 by connecting screws. The upper cover 12 seals the receiving cavity of the housing 11 and encloses the first PCBA board 4 in the receiving cavity of the housing 11.

[0073] One side of the housing 11 is provided with an opening. The battery cell module 2 is arranged inside the housing 11. One side of the battery cell module 2 is fixed on the battery cell support 3. The battery cell support 3 is fixedly connected to the housing 11 and is located at the opening of the housing 11. The battery cell module 2 is electrically connected to the bus bar of the housing 11 through the battery cell support 3.

[0074] The second PCBA board 5 is arranged on the battery cell support 3. The second PCBA board 5 is electrically connected to the bus bar on the housing 11 and the battery cell module 2, and the second PCBA board 5 is electrically connected to the first PCBA board 4.

[0075] The side cover 13 is arranged on the housing 11 and is located at the opening of the housing 11. The side cover 13 seals the opening of the housing 11, so that the battery cell module 2 and the second PCBA board 5 are located in the closed box body 1.

[0076] After the housing 11, the upper cover 12 and the side cover 13 are assembled, the sealed box body 1 is formed.

[0077] It is not difficult to find from the above content that for the split soft-pack battery module of this embodiment, by setting the box body, the battery cell module, the battery cell support, the first PCBA board and the second PCBA board, the box body includes: the housing, the upper cover and the side cover. The housing is provided with an integrally formed conductive row, bus bar and reinforcing rib. The first PCBA board is arranged in the accommodation cavity of the housing and is electrically connected to the conductive row. The upper cover seals the accommodation cavity of the housing. The battery cell module is arranged on the battery cell support. The battery cell support is connected to the opening of the housing. The battery cell module is electrically connected to the bus bar. The second PCBA board is arranged on the battery cell support and is electrically connected to the battery cell module and the first PCBA board. The side cover seals the opening of the housing. In the split soft-pack battery module of this embodiment, the second PCBA board is arranged on the battery cell support and is electrically connected to the battery cell module. The second PCBA board collects parameters such as the voltage and temperature of the battery cell module. The first PCBA board is arranged in the accommodation cavity at the top of the housing and is separated from the battery cell module. It is more unlikely to be damaged by extrusion, ensuring the control of the battery cell module. Multiple components on the housing are integrally injection-molded with the housing as inserts, making the housing structure simple and facilitating the rapid assembly of other components in the future.

[0078] Optionally, in the split soft-pack battery module of this embodiment, the housing 11 is further provided with signal PIN pins 113 and communication PIN pins 114, and there are multiple signal PIN pins 113 and communication PIN pins 114.

[0079] The signal PIN 113 is disposed at the opening of the housing 11, the communication PIN 114 is disposed in the accommodating cavity of the housing 11, Pressfit PINs are provided at both ends of the signal PIN 113, and a Pressfit PIN is provided at the top end of the communication PIN 114.

[0080] The first PCBA board 4 is provided with a transfer row 41 and a plurality of communication PIN holes 42.

[0081] The first PCBA board 4 is embedded in the accommodating cavity of the housing 11, such that the communication PIN 114 passes through the communication PIN holes 42 of the first PCBA board 4, so that the first PCBA board 4 is electrically connected to the communication PIN 114.

[0082] The first PCBA board 4 is further provided with signal PIN holes, so that the first PCBA board 4 is electrically connected to the signal PIN 113 on the housing 11.

[0083] The transfer row 41 of the first PCBA board 4 is electrically connected to the conductive row on the housing 11, and the conductive row of the housing 11 is used for electrical connection with the client.

[0084] The second PCBA board 5 is provided with signal PIN holes 51.

[0085] The second PCBA board 5 is disposed on the battery cell bracket 3, and the signal PIN 113 on the housing 11 passes through the signal PIN holes 51 of the second PCBA board 5, so that the second PCBA board 5 is electrically connected to the signal PIN 113, thereby enabling the second PCBA board 5 to be electrically connected to the first PCBA board 4.

[0086] Optionally, as Figure 2 and Figure 5 shown, in the split soft-pack battery module of this embodiment, the battery cell module 2 includes: a soft-pack battery cell 21, a foam 22, and an end plate 23.

[0087] A plurality of soft-pack battery cells 21 and foams 22 are provided. The plurality of soft-pack battery cells 21 are arranged in a stacked manner, and foams 22 are laid between two adjacent soft-pack battery cells 21, that is, the plurality of soft-pack battery cells 21 and the plurality of foams 22 are arranged in an alternating up-and-down manner.

[0088] Two end plates 23 are provided. The two end plates 23 are respectively disposed at the top and bottom of the plurality of soft-pack battery cells 21, and foams 22 are also laid between the end plates 23 and the soft-pack battery cells 21.

[0089] One end of the soft-pack battery cell 21 is provided with a pair of tab ears 211, namely a positive tab ear 2111 and a negative tab ear 2112 respectively. The positive tab ear 2111 and the negative tab ear 2112 of the soft-pack battery cell 21 are electrically connected to the positive nickel sheet 521 and the negative nickel sheet 522 of the following second PCBA board 5 respectively, and the positive tab ears 2111 of multiple soft-pack battery cells 21 are electrically connected to the positive copper row 321 of the following battery cell bracket 3 after being connected in series, and the negative tab ears 2112 of multiple soft-pack battery cells 21 are electrically connected to the negative copper row 322 of the following battery cell bracket 3 after being connected in series.

[0090] Further, as Figure 2 and Figure 6 shown, in the split soft-pack battery module of this embodiment, the battery cell bracket 3 includes: a frame body 31 and a connecting copper row 32.

[0091] The frame body 31 is provided with pores.

[0092] The frame body 31 is fixedly arranged on one side of the battery cell module 2, so that the tab ears 211 of the soft-pack battery cell 21 pass through the pores of the frame body 31. The frame body 31 is fixedly connected to the battery cell module 2 through connecting screws, and the frame body 31 is fixed on the housing 11 through fixing screws.

[0093] The connecting copper row 32 is arranged on the frame body 31. The connecting copper row 32 includes: a positive copper row 321 and a negative copper row 322. The positive copper row 321 is electrically connected to the positive tab ear 2111 of the soft-pack battery cell 21, the negative copper row 322 is electrically connected to the negative tab ear 2112 of the soft-pack battery cell 21, and the positive copper row 321 and the negative copper row 322 are electrically connected to the positive bus bar 1121 and the negative bus bar 1122 on the housing 11 respectively.

[0094] Further, as Figure 6 and Figure 8 shown, in the split soft-pack battery module of this embodiment, the second PCBA board 5 is provided with connecting nickel sheets 52.

[0095] The second PCBA board 5 is arranged on the frame body 31, so that the signal PIN pins 113 on the housing 11 pass through the signal PIN pin holes 51 of the second PCBA board 5.

[0096] The connecting nickel sheets 52 include: a positive nickel sheet 521 and a negative nickel sheet 522. The positive nickel sheet 521 of the second PCBA board 5 is electrically connected to the positive tab ear 2111 of the soft-pack battery cell 21, and the negative nickel sheet 522 of the second PCBA board 5 is electrically connected to the negative tab ear 2112 of the soft-pack battery cell 21.

[0097] Optionally, as Figure 2 and Figure 3As shown in the figure, in the split soft-pack battery module of this embodiment, the positive electrode conductive busbar 1111 of the housing 11 includes: a first conductive busbar 11111 and a first connecting member 11112.

[0098] The first connecting member 11112 is welded to the first conductive busbar 11111. The first connecting member 11112 is a stud or a nut, and the first connecting member 11112 forms a positive electrode output interface on the housing 11. There are two positive electrode conductive busbars in this embodiment. The first connecting members of the two positive electrode conductive busbars are a stud and a nut respectively, and two positive electrode output interfaces are formed on the housing.

[0099] The negative electrode conductive busbar 1112 includes: a second conductive busbar 11121 and a second connecting member 11122. The second connecting member 11122 is a nut, and the second connecting member 11122 forms a negative electrode output interface on the housing 11.

[0100] The first connecting member 11112 and the second connecting member 11122 form output interface terminals for the positive electrode and the negative electrode on the housing 11, which is convenient for electrical connection with the client; and there are 2 positive electrode conductive busbars, which can be compatible with the connection of multiple external terminals.

[0101] The positive electrode busbar 1121 includes: a third conductive busbar 11211 and a first conductive stud 11212.

[0102] The first conductive stud 11212 is welded to the third conductive busbar 11211 and is electrically connected to the positive electrode copper bar 321 on the frame 31.

[0103] The negative electrode busbar 1122 includes: a fourth conductive busbar 11221 and a second conductive stud 11222.

[0104] The second conductive stud 11222 is welded to the fourth conductive busbar 11221 and is electrically connected to the negative electrode copper bar 322 on the frame 31.

[0105] The first connecting member 11112 of the positive electrode conductive busbar 1111 and the first conductive stud 11212 of the positive electrode busbar 1121 are located on one side (left side) of the housing 11. The second connecting member 11122 of the negative electrode conductive busbar 1112 and the second conductive stud 11222 of the negative electrode busbar 1122 are located on the opposite side (right side) of the housing 11. The distance between the first conductive stud 11212 of the positive electrode busbar and the second conductive stud 11222 of the negative electrode busbar 1122 reaches 30% of the total length of the corresponding side of the housing 11, so that the two will not easily come into contact and cause a short circuit of the battery cells.

[0106] In this embodiment, the positive electrode and the negative electrode of the soft-pack battery module are far apart. When the housing is extruded and deformed, the positive electrode and the negative electrode are not easily in contact with each other to cause a short circuit of the soft-pack battery cells, improving the safety of the battery cells.

[0107] Optionally, in the split soft-pack battery module of this embodiment, the housing 11 is provided with a support frame 115 at the bottom of the accommodation cavity.

[0108] The support frame 115 is in a grid shape and is integrally formed with the housing 11 by injection molding. The first PCBA board 4 is embedded on the support frame 115 of the housing 11, so that there is a certain distance between the first PCBA board 4 and the top plate of the housing 11, which is beneficial to the cooling and heat dissipation of the first PCBA board 4; and the support frame 115 also forms a reinforcing rib of the housing 11, further improving the strength and anti-extrusion ability of the housing 11.

[0109] Optionally, in the split soft-pack battery module of this embodiment, sealant 6 is filled between the first PCBA board 4 and the upper cover 12, and between the battery cell support 3 and the side cover 13, so that the first PCBA board 4 and the battery cell support 3 are more stable in the box body 1.

[0110] Optionally, in the split soft-pack battery module of this embodiment, a breather valve 116 is provided on one side wall of the housing 11.

[0111] The breather valve 116 is communicated with the inside of the housing 11. When the battery cell module 2 releases gas due to thermal runaway and causes the pressure in the housing 11 (box body) to exceed the threshold value of the breather valve 116, the breather valve 116 opens to relieve pressure, preventing the box body 1 from being in danger due to excessive pressure.

[0112] Furthermore, in the split soft-pack battery module of this embodiment, the materials of the housing 11, the upper cover 12 and the side cover 13 are plastics.

[0113] The upper cover 12 is provided with a glue groove 121.

[0114] In the split soft-pack battery module of the present utility model, the second PCBA board is electrically connected to the tabs of the soft-pack battery cells for collecting parameters such as the voltage and temperature of the soft-pack battery cells. The first PCBA board is the management system of the battery module and is arranged in the accommodation cavity of the housing for realizing various functions of the split soft-pack battery module. The assembly process of the split soft-pack battery module is as follows:

[0115] Insert the assembled battery cell module 2 onto the frame body 31 of the battery cell support 3, so that the tabs 211 of the soft-pack battery cells 21 pass through the corresponding pores on the frame body 31, and then lock and fix the battery cell support and the battery cell module together with screws; then roll the tabs of the soft-pack battery cells flat and perform laser welding; then place the second PCBA board 5 into the corresponding positioning structure of the frame body 31, and then fix the second PCBA board 5 with two SR nylon rivets. The second PCBA board 5 is provided with a positive nickel sheet and a negative nickel sheet, and the positive nickel sheet and the negative nickel sheet are respectively laser welded to the bent positive tab and negative tab by laser welding.

[0116] Then, the entire module is loaded into the housing through the opening of the housing 11, and then the frame is locked to the housing with screws; next, the positive copper busbar and the negative copper busbar are installed on the frame of the battery cell support, and the connecting copper busbar is connected to the busbar of the housing, and then the sealant and the side cover are installed.

[0117] Then, the first PCBA board is pressed into the accommodating cavity of the housing by a jig, so that the communication PIN pins on the housing are in good contact with the inner wall of the communication PIN pin holes of the first PCBA board; then, the first PCBA board is locked with screws; next, other pins are soldered to the first PCBA board; then, the wire harness is inserted into the corresponding connectors on the first PCBA board and glue is applied.

[0118] Finally, the upper cover and the sealant are installed to seal the upper cover and the housing. Sealant is applied in the glue groove 121 of the upper cover, and then the upper cover is installed upside down on the housing and locked and fixed with screws to complete the assembly of the split soft-pack battery module.

[0119] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first feature is in direct contact with the second feature, or the first feature and the second feature are in indirect contact through an intermediate medium.

[0120] Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0121] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example" or "some examples", etc., means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0122] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A separate soft-pack battery module, characterized in that: include: Box body, battery cell module, battery cell bracket, first PCBA board and second PCBA board; The box body comprises: a shell, an upper cover and a side cover; The housing is provided with an integrally formed conductive bar, a bus bar and a reinforcing rib, wherein the reinforcing rib is arranged on the side wall of the housing to enhance the strength and anti-extrusion capability of the housing; A receiving cavity is provided on the top of the housing, and the first PCBA board is embedded in the receiving cavity and electrically connected to the conductive bar; The upper cover is arranged on the housing and is used to seal the accommodating cavity; An opening is provided on one side of the shell, the battery cell module is arranged on the battery cell bracket and is located inside the shell, the battery cell bracket is connected to the opening of the shell, and the battery cell module is electrically connected to the busbar; The second PCBA board is arranged on the battery support and is electrically connected to the battery module, and the second PCBA board is electrically connected to the first PCBA board; The side cover is arranged at the opening of the housing and is used to seal the housing.

2. The split soft pack battery module according to claim 1, characterized in that: The housing is provided with a signal PIN pin and a communication PIN pin; The first PCBA board is provided with a transfer row and a communication PIN pin hole, the transfer row is electrically connected to the conductive row, and the communication PIN pin is inserted into the communication PIN pin hole, so that the communication PIN pin is electrically connected to the first PCBA board; And the first PCBA board is electrically connected to the signal PIN needle; The second PCBA board is provided with a signal PIN pin hole, the signal PIN pin is inserted into the signal PIN pin hole, and the second PCBA board is electrically connected to the signal PIN pin.

3. The split soft pack battery module according to claim 1, characterized in that: The battery cell module includes: soft-pack battery cells, foam and end plates; The soft-packed battery cells and the foam are provided in plurality, the plurality of soft-packed battery cells are stacked, the two end plates are respectively arranged at the top and bottom of the plurality of soft-packed battery cells, and the foam is laid between two adjacent soft-packed battery cells and between the end plates and the soft-packed battery cells; One end of the soft-pack battery cell is provided with a pole ear, and the pole ear is used to be electrically connected to the bus bar and the second PCBA board.

4. The split soft pack battery module according to claim 3, characterized in that: The battery cell support comprises: a frame body and a connecting copper bar; The frame is fixedly connected to the battery module and fixed on the shell; The frame is provided with a hole for the tab to pass through; The connecting copper bar is arranged on the frame, electrically connected to the bus bar, and electrically connected to the tab.

5. The split soft pack battery module according to claim 4, characterized in that: The second PCBA board is provided with a connecting nickel sheet; The connecting nickel sheet is electrically connected to the tab.

6. The split soft pack battery module according to claim 4, characterized in that: The conductive bars include: a positive conductive bar and a negative conductive bar; The positive electrode conductive bar comprises: a first conductive bar and a first connecting member, wherein the first connecting member is arranged on the first conductive bar; The negative electrode conductive bar comprises: a second conductive bar and a second connecting member, the second connecting member is arranged on the second conductive bar, and the first connecting member and the second connecting member are used to connect to the client; The busbars include: a positive busbar and a negative busbar; The positive busbar comprises: a third conductive bar and a first conductive stud, wherein the first conductive stud is arranged on the third conductive bar; The negative electrode bus bar comprises: a fourth conductive bar and a second conductive stud, the second conductive stud is arranged on the fourth conductive bar, and the first conductive stud and the second conductive stud are used to be electrically connected to the connecting copper bar; The first connecting member and the first conductive stud are located on one side of the shell, and the second connecting member and the second conductive stud are located on the other side of the shell opposite to the first connecting member and the second conductive stud.

7. The split soft pack battery module according to claim 1, characterized in that: The shell is provided with a supporting frame at the bottom of the accommodating cavity; The support frame is in a grid shape and is integrally formed with the shell, and the first PCBA board is embedded in the support frame.

8. The split soft pack battery module according to claim 1, characterized in that: Sealant is provided between the first PCBA board and the upper cover, and between the battery cell support and the side cover.

9. The split soft pack battery module according to claim 1, characterized in that: A breathing valve is arranged on the side wall of the shell.

10. The split soft-pack battery module according to any one of claims 1 to 9, characterized in that: The shell, the upper cover and the side cover are made of plastic.

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