Soft package battery module

Abstract

The utility model relates to a soft package battery module, which belongs to the technical field of batteries and is characterized in that the soft package battery module comprises a shell, a battery cell group, a battery connecting plate, a module control plate, a screw, an upper cover, a side cover and a sealant, the top surface of the shell is provided with an anode conducting bar, a cathode conducting bar and a second cavity, and the side surface of the shell is provided with a first cavity; the opening end faces of the first cavity and the second cavity are provided with bulges and screw holes surrounding the end faces by one circle; the upper cover and the second cavity are mutually fixed through screws and sealants arranged at the protrusions and the grooves, and the side cover and the first cavity are mutually fixed through combination of the female buckles and the male buckles and the sealants arranged at the protrusions and the grooves; the battery cell group arranged in the shell is electrically connected with the battery connecting plate after a plurality of soft package battery cells are connected in series and / or in parallel; and the battery connecting plate is electrically connected with the module control panel and then outputs the current of the battery cell group through the positive conductive connecting terminal and the negative conductive connecting terminal. The flexible package battery module can be compatible with a plurality of flexible package battery modules with external terminals at different positions.

Description

Technical Field

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

[0002] With the rapid development of technology and the rise of the new energy industry, battery technology, as the core power source, has been increasingly widely used in various fields. In the electric vehicle industry, soft-pack battery modules can significantly improve the driving range and performance of electric vehicles due to their high energy density and lightweight characteristics, and have become one of the mainstream technologies. The soft-pack batteries in the soft-pack battery module, also known as polymer lithium-ion batteries or aluminum-plastic film batteries, are a form of battery encapsulation using an aluminum-plastic composite film as the outer shell. Compared with traditional cylindrical or square hard-shell batteries, soft-pack batteries have significant advantages in terms of energy density, design flexibility, weight, etc. However, since soft-pack batteries will expand with the increase of the service life, in order to be used as a starting power source in electric vehicles, multiple soft-pack battery cells need to be combined into a soft-pack battery module through series-parallel connection, and a liner is used to press the soft-pack battery core to limit the expansion of the soft-pack battery core within a specified space. However, the current design makes the soft-pack battery module have a complex structure, high cost, and requires different external connection methods to be designed according to different electric vehicles. Therefore, a soft-pack battery module with a simple structure, low cost, and compatible with multiple external terminals can bring faster development to the electric vehicle market. Summary of the Invention

[0003] The purpose of the utility model is to provide a soft-pack battery module with a simple structure and compatible with multiple external terminals for the problems existing in the prior art.

[0004] The technical solution is as follows:

[0005] A soft-pack battery module includes a housing (100), a battery cell group (200), a battery connection plate (300), a module control board (400), screws (500), an upper cover (600), side covers (700), and sealant (800); wherein on the top surface of the housing, there are a positive conductive busbar (101), a negative conductive busbar (102), and a second cavity (108). Inside the second cavity, there are a module control board (400), communication PIN pins (103), positive conductive busbar PIN feet (1011), positive transfer busbar PIN feet (1041), negative conductive busbar riveting studs (1021), negative transfer busbar riveting studs (1052), and multiple screw holes (111). On the side, there is a first cavity (107). Inside the first cavity, there are a battery connection plate (300), positive transfer busbar PIN feet (1041), negative transfer busbar PIN feet (1051), multiple transfer PIN pins (106), and multiple screw holes (111). On the side with the opening, there is a male buckle (109). On the opening end faces of the first cavity and the second cavity, there are protrusions (110) and screw holes that encircle the end face in a circle; on the circumferential side of the opening of the upper cover, there are multiple countersunk through holes (610), and on the opening end face, there is an upper cover groove (620) that encircles the end face in a circle. On the side with the opening of the side cover (700), there is a female buckle (710), and on the opening end face, there is a side cover groove (720) that encircles the end face in a circle. The upper cover and the second cavity are fixed to each other by screws and sealant placed in the cavity (1000) formed at the protrusion and the groove. The side cover and the first cavity are fixed to each other by the combination of the female buckle and the male buckle and sealant placed in the cavity formed at the protrusion and the groove; the battery cell group arranged inside the housing is electrically connected to the battery connection plate after multiple soft-pack battery cells (210) are connected in series and / or in parallel, and after the battery connection plate is electrically connected to the module control board, the current of the battery cell group is output through a positive conductive connection terminal (1012) and a negative conductive connection terminal (1022).

[0006] Further, a foam (230) is arranged between every two adjacent battery cells (210) in the battery cell group, and a protective plate (220) is respectively arranged on each of the two outermost sides of the battery cell group.

[0007] Further, the housing, the upper cover, and the side covers are all made of plastic material. Reinforcing ribs are arranged on the inner sides of the upper cover and the side covers. The middle sections of the positive conductive busbar, the negative conductive busbar, the communication PIN pins, the positive transfer busbar, the negative transfer busbar, and the transfer PIN pins are all coated with plastic.

[0008] Further, the positive conductive connection terminal of the positive conductive busbar and the negative conductive connection terminal of the negative conductive busbar are conical cylinders or press riveting studs.

[0009] Further, the battery connection board (300) is provided with a battery connection board fixing hole (310) for fixing it in the first cavity by screws, a first through hole (320) for the positive transfer row PIN foot and the negative transfer row PIN foot to pass through and be welded, a long through hole (330) for the battery cell tab (211) to pass through, a second through hole (340) for the press-fit PIN needle (1061) for communication connection between the battery connection board and the module control board to pass through and be welded, a first current-carrying row (350), a welding row (360) for welding the battery cell tab, and a voltage acquisition chip.

[0010] Furthermore, the battery cell tab (211) is laser welded, and the positive transfer row PIN foot (1041) and the negative transfer row PIN foot (1051) are soldered.

[0011] Further, the module control board (400) is provided with a module control board fixing hole (410) for fixing it in the second cavity by screws, a third through hole (420) for the positive conductive row PIN foot (1011) and the positive transfer row PIN foot (1041) to pass through and be welded, a fourth through hole (430) for the press-fit PIN needle (1061) for communication connection between the battery connection board and the module control board to pass through and be welded, a shunt (440), a second current-carrying row (450), and a battery module management chip; the shunt (440) is provided with two fifth through holes (460) respectively connected to the negative conductive row and the negative transfer row by riveting studs and nuts (900).

[0012] Furthermore, the positive conductive row PIN foot, the positive transfer row PIN foot, and the communication PIN needle are soldered, and the shunt and the second current-carrying row are SMT soldered.

[0013] Beneficial effects:

[0014] 1) The structure of the present utility model is simple, and it can be compatible with soft-pack battery modules with external terminals at multiple different positions.

[0015] 2) Fixing is completed and waterproofing is easier through methods such as setting sealant in the cavities formed by screws and screw holes, female fasteners and male fasteners, and protrusions and grooves.

[0016] 3) Voltage acquisition and module management are respectively arranged on two circuit boards, reducing the maintenance cost. Description of the drawings

[0017] Figure 1 is the overall structure schematic diagram of the present utility model;

[0018] Figure 2 is the exploded view of the structure of the present utility model;

[0019] Figure 3It is a schematic structural diagram of a battery cell group;

[0020] Figure 4 It is a schematic structural diagram of a housing;

[0021] Figure 5 It is a schematic structural diagram of a battery connection plate;

[0022] Figure 6 It is a schematic structural diagram of a module control board;

[0023] Figure 7 It is a schematic structural diagram of an upper cover;

[0024] Figure 8 It is a schematic structural diagram of a side cover;

[0025] Figure 9 It is a schematic diagram of the battery connection plate installed in the first cavity;

[0026] Figure 10 It is a schematic diagram of the module control board installed in the second cavity;

[0027] Figure 11 It is a partially enlarged detail view of the fixation of the side cover and the housing.

[0028] Among them: 100 is the housing, 101 is the positive conductive busbar, 1011 is the PIN foot of the positive conductive busbar, 1021 is the riveting stud of the negative conductive busbar, 102 is the negative conductive busbar, 103 is the communication PIN needle, 104 is the positive transfer busbar, 1041 is the PIN foot of the positive transfer busbar, 105 is the negative transfer busbar, 1051 is the PIN foot of the negative transfer busbar, 1052 is the riveting stud of the negative transfer busbar, 106 is the transfer PIN needle, 1061 is the press-fitted PIN needle, 107 is the first cavity, 108 is the second cavity, 109 is the male buckle, 110 is the protrusion, 111 is the screw hole, 200 is the battery cell group, 210 is the battery cell, 211 is the tab of the battery cell, 230 is the foam, 220 is the protection plate, 300 is the battery connection plate, 310 is the fixing hole of the battery connection plate, 320 is the first through hole, 330 is the long strip through hole, 340 is the second through hole, 350 is the first current-carrying busbar, 360 is the welding row, 400 is the module control board, 410 is the fixing hole, 420 is the third through hole, 430 is the fourth through hole, 440 is the shunt, 450 is the second current-carrying busbar, 460 is the fifth through hole, 500 is the screw, 600 is the upper cover, 610 is the countersunk through hole, 620 is the groove of the upper cover, 700 is the side cover, 710 is the female buckle, 720 is the groove of the side cover, 800 is the sealant, 900 is the nut, 1000 is the cavity. Specific implementation method

[0029] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. The orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model, 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 cannot be construed as a limitation of the present utility model:

[0030] As Figure 1 , Figure 2 , Figure 4 , Figure 7 , Figure 8 shown, a soft-pack battery module includes a housing 100, a battery cell group 200, a battery connection plate 300, a module control board 400, screws 500, an upper cover 600, side covers 700 and a sealant 800; wherein a positive conductive bus 101, a negative conductive bus 102 and a second cavity 108 are provided on the top surface of the housing, and a module control board 400, communication PIN pins 103, positive conductive bus PIN feet 1011, positive adapter bus PIN feet 1041, negative conductive bus riveting studs 1021, negative adapter bus riveting studs 1052 and a plurality of screw holes 111 are provided in the second cavity. A first cavity 107 is provided on the side surface, and a battery connection plate 300, positive adapter bus PIN feet 1041, negative adapter bus PIN feet 1051, a plurality of adapter PIN pins 106 and a plurality of screw holes 111 are provided in the first cavity. A male buckle 109 is provided on the side surface of its opening, and a protrusion 110 and screw holes are provided on the opening end surfaces of the first cavity and the second cavity around the circumference of the end surface; a plurality of countersunk through holes 610 are provided on the circumferential side surface of the opening of the upper cover, and an upper cover groove 620 is provided on the opening end surface around the circumference of the end surface. A female buckle 710 is provided on the side surface of the opening of the side cover 700, and a side cover groove 720 is provided on the opening end surface around the circumference of the end surface. The upper cover and the second cavity are fixed to each other by screws and a sealant is provided in the cavity 1000 formed at the protrusion and the groove. The side cover and the first cavity are fixed to each other by the combination of the female buckle and the male buckle and a sealant is provided in the cavity formed at the protrusion and the groove; the battery cell group arranged in the housing is electrically connected to the battery connection plate after being connected in series and / or in parallel by a plurality of soft-pack battery cells 210, and the current of the battery cell group is output through a positive conductive connection terminal 1012 and a negative conductive connection terminal 1022 after the battery connection plate is electrically connected to the module control board.

[0031] As Figure 3 shown, a foam 230 is provided between every two adjacent battery cells 210 in the battery cell group, and a protection plate 220 is provided on each of the two outermost sides of the battery cell group.

[0032] The housing, the upper cover and the side cover are all made of plastic. Reinforcing ribs are provided on the inner sides of the upper cover and the side cover. The middle sections of the positive conductive busbar, the negative conductive busbar, the communication PIN pins, the positive adapter busbar, the negative adapter busbar and the adapter PIN pins are all coated with plastic.

[0033] The positive conductive connection terminal of the positive conductive busbar and the negative conductive connection terminal of the negative conductive busbar are conical cylinders or press riveting studs.

[0034] As Figure 5 shown, on the battery connection board 300, there are battery connection board fixing holes 310 for fixing it in the first cavity by screws, first through holes 320 for the PIN feet of the positive adapter busbar and the negative adapter busbar to pass through and be welded, elongated through holes 330 for the cell tabs 211 to pass through, second through holes 340 for the press-fit PIN pins 1061 for communication connection between the battery connection board and the module control board to pass through and be welded, a first current-carrying busbar 350, a welding busbar 360 for welding the cell tabs, and a voltage acquisition chip. The cell tabs 211 are laser welded, and the PIN feet 1041 of the positive adapter busbar and the PIN feet 1051 of the negative adapter busbar are soldered.

[0035] As Figure 6 shown, on the module control board 400, there are module control board fixing holes 410 for fixing it in the second cavity by screws, third through holes 420 for the PIN feet 1011 of the positive conductive busbar and the PIN feet 1041 of the positive adapter busbar to pass through and be welded, fourth through holes 430 for the press-fit PIN pins for communication connection between the battery connection board and the module control board to pass through and be welded, a shunt 440, a second current-carrying busbar 450 and a battery module management chip; on the shunt 440, there are fifth through holes 460 for connecting to the negative conductive busbar and the negative adapter busbar respectively by riveting studs and nuts 900. The PIN feet of the positive conductive busbar, the PIN feet of the positive adapter busbar and the communication PIN pins are soldered, and the shunt and the second current-carrying busbar are SMT soldered.

[0036] Example 1:

[0037] As Figure 9As shown, after assembling the battery cell group (200), it is inserted into the first cavity (107) of the housing; the battery connection board (300) is placed at the opening position of the first cavity (107) of the housing. During the process of placing it at the opening position of the first cavity (107), the tabs (211) of all battery cells pass through the long strip-shaped through holes (330), and the positive transfer row PIN feet (1041), negative transfer row PIN feet (1051), and the press-fit PIN needles (1061) of the transfer PIN respectively pass through the first through holes (320) and the second through holes (340) on the battery connection board (300); multiple screws (500) pass through the battery connection board fixing holes (310) of the battery connection board and are screwed into the screw holes (111) of the housing to fix the battery connection board (300) on the side of the housing (100); then, through the welding process, the battery cell tabs (211), positive transfer row PIN feet (1041), and negative transfer row PIN feet (1051) are welded to the battery connection board (300). The laser welding process is selected for welding the battery cell tabs (211), and the tin soldering is selected for welding the positive transfer row PIN feet (1041) and negative transfer row PIN feet (1051).

[0038] As Figure 10As shown in the figure, the module control board (400) is placed at the opening position of the second cavity (108) of the housing. During the process of placing the opening of the second cavity (108), multiple positive conductive row PIN feet (1011), positive transfer row PIN feet (1041), communication PIN needles (103), and press-fit PIN needles (1061) of the transfer PIN pass through the third through holes (420) and fourth through holes (430) of the module control board. The negative conductive row riveting studs (1021) and negative transfer row riveting studs (1052) pass through the shunt through holes (460) of the module control board. Multiple screws (500) pass through the fixing holes (410) of the module control board and are screwed into the screw holes (111) of the housing to fix the module control board (400) on the housing (100). Multiple positive conductive row PIN feet (1011), positive transfer row PIN feet (1041), and communication PIN needles (103) are soldered to the module control board (400). Two nuts (900) are respectively locked on the negative conductive row riveting stud (1021) and negative transfer row riveting stud (1052). That is, the battery connection board and the module control board are connected to each other through the negative transfer row PIN feet (1051), positive transfer row PIN feet (1041), communication PIN needles (103), and press-fit PIN needles (1061) of the transfer PIN. The cell voltage collected by the voltage acquisition chip on the battery connection board is transmitted to the module management chip on the module control board for management, controlling the charging and discharging of the battery, and giving an alarm in case of abnormality. Since the voltage acquisition chip and the module management chip are respectively set on two circuit boards, only one circuit board needs to be replaced when only one of them has a problem, reducing the maintenance difficulty and cost.

[0039] Finally, install the side cover (700) and the upper cover (600). The female buckle (710) of the side cover is buckled with the male buckle (109) of the housing to fix the side cover (700) on the housing (100). Screws (500) pass through multiple countersunk through holes (610) of the upper cover and are locked on multiple screw holes (113) of the housing to fix the upper cover (600) on the housing (100).

[0040] As Figure 11 shown, the side cover (700) and the upper cover (600) are respectively sealed with the housing (100), and the sealing methods are the same. Taking the sealing method between the side cover (700) and the housing (100) as an example, the protrusion (110) of the housing is inserted into the side cover groove (720) of the side cover. After the protrusion (110) of the housing and the side cover groove (720) of the side cover are well matched, a "U"-shaped cavity (1000) is formed. Waterproof glue (800) is filled in the cavity (1000) for the sealing of the battery module. The sealing method of the upper cover (600) and the housing (100) is also as described above.

[0041] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the principle and spirit of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A soft pack battery module, characterized in that: The invention comprises a housing (100), a battery cell group (200), a battery connection plate (300), a module control board (400), screws (500), an upper cover (600), a side cover (700) and a sealant (800); wherein the top surface of the housing is provided with a positive electrode conductive row (101), a negative electrode conductive row (102) and a second cavity (108); and the second cavity is provided with a module control board (400), a communication PIN pin (103), a positive electrode conductive row PIN pin (101 1), a positive electrode transfer row PIN pin (1041), a negative electrode conductive row riveting stud (1021), a negative electrode transfer row riveting stud (1052) and a plurality of screw holes (111), a first cavity (107) is arranged on the side, a battery connection plate (300), a positive electrode transfer row PIN pin (1041), a negative electrode transfer row PIN pin (1051), a plurality of transfer PIN pins (106) and a plurality of screw holes (111) are arranged in the first cavity, and a positive electrode transfer row PIN pin (1041), a negative electrode transfer row PIN pin (1051), a plurality of transfer PIN pins (106) and a plurality of screw holes (111) are arranged on the side of the opening A male buckle (109) is provided, and a protrusion (110) and a screw hole are provided on the opening end surface of the first cavity and the second cavity. A plurality of countersunk through holes (610) are provided on the circumferential side surface of the upper cover opening, and an upper cover groove (620) is provided on the opening end surface. A female buckle (710) is provided on the side surface of the opening of the side cover (700), and a side cover groove (720) is provided on the opening end surface. The upper cover and the second cavity are connected by screws and screws on the protrusions and grooves. The side cover and the first cavity are fixed to each other by a sealant arranged in the cavity (1000) formed at the protrusion and the groove, and the sealant is arranged in the cavity formed at the protrusion and the groove to fix each other; the battery cell group arranged in the shell is electrically connected to the battery connection board after a plurality of soft-pack battery cells (210) are connected in series and / or in parallel, and the battery connection board is electrically connected to the module control board to output the current of the battery cell group through the positive conductive connection terminal (1012) and the negative conductive connection terminal (1022).

2. The soft pack battery module according to claim 1, characterized in that: A foam (230) is arranged between every two adjacent battery cells (210) in the battery cell group, and a protective plate (220) is respectively arranged on the two outermost sides of the battery cell group.

3. The soft pack battery module according to claim 1, characterized in that: The shell, upper cover and side cover are all made of plastic, and reinforcing ribs are arranged on the inner side of the upper cover and the side cover. The positive conductive bar, negative conductive bar, communication PIN needle, positive transfer bar, negative transfer bar and the middle section of the transfer PIN needle are all covered with plastic.

4. The soft pack battery module according to claim 1, characterized in that: The positive conductive connection terminal of the positive conductive bar and the negative conductive connection terminal of the negative conductive bar are conical cylinders or riveted studs.

5. The soft pack battery module according to claim 1, characterized in that: The battery connecting plate (300) is provided with a battery connecting plate fixing hole (310) for fixing the battery connecting plate in the first cavity by screws, a first through hole (320) for the positive electrode transfer row PIN pin and the negative electrode transfer row PIN pin to pass through and be welded, a long strip through hole (330) for the battery cell tab (211) to pass through, a second through hole (340) for the press-fit PIN needle (1061) for communication connection between the battery connecting plate and the module control board to pass through and be welded, a first overcurrent bar (350), a welding bar (360) for welding the battery cell tab, and a voltage acquisition chip.

6. The soft pack battery module according to claim 5, characterized in that: The battery cell tabs (211) are welded by laser, and the positive electrode transfer row PIN pins and the negative electrode transfer row PIN pins are welded by tin soldering.

7. The soft pack battery module according to claim 1, characterized in that: The module control board (400) is provided with a module control board fixing hole (410) for fixing it in the second cavity by screws, a third through hole (420) for the positive conductive bar PIN pin (1011) and the positive transfer bar PIN pin (1041) to pass through and be welded, a fourth through hole (430) for the press-fit PIN pin (1061) for communication connection between the battery connection board and the module control board to pass through and be welded, a shunt (440), a second current bar (450) and a battery module management chip; the shunt (440) is provided with two fifth through holes (460) respectively connected to the negative conductive bar and the negative transfer bar by riveting studs and nuts (900).

8. The soft pack battery module according to claim 7, characterized in that: The positive conductive row PIN pin, the positive transfer row PIN pin and the communication PIN pin are welded by tin soldering, and the shunt and the second overcurrent row are welded by SMT.

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