CN212848665U - Laminate polymer battery module - Google Patents
Laminate polymer battery module Download PDFInfo
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- CN212848665U CN212848665U CN202020313908.9U CN202020313908U CN212848665U CN 212848665 U CN212848665 U CN 212848665U CN 202020313908 U CN202020313908 U CN 202020313908U CN 212848665 U CN212848665 U CN 212848665U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The utility model discloses a soft package battery module, which comprises a battery cell group, a left side plate, a right side plate, an upper cover plate, a lower cover plate, a front side plate and a rear side plate, wherein the left side plate, the right side plate, the upper cover plate and the lower cover plate are arranged outside the battery cell group; the left and right side plates and the upper and lower cover plates or the left and right side plates and the front and rear side plates are adjustably and detachably connected to tightly press the internal cell group, so that the left and right side plates are continuously restrained by the upper and lower cover plates or the left and right side plates to generate pressure for clamping the cell, thereby tightly pressing the cell; the left side plate, the right side plate, the upper cover plate, the lower cover plate, the front side plate and the rear side plate can be detachably connected to package the battery cell to form a soft package battery module; the battery pack comprises foam, the left side plate and the right side plate are parallel to or in the same direction with the plane of the battery piece, and the front side plate and the rear side plate are perpendicular to the left side plate, the right side plate and the horizontal plane. The utility model discloses a battery not only the wholeness can greatly improve, the whole assembly efficiency of battery is high moreover.
Description
Technical Field
The utility model relates to a battery technology field relates to a laminate polymer battery module, especially relates to a laminate polymer battery module convenient to pretension and assembly.
Background
The lithium ion power battery is taken as a core component of the new energy automobile at present, and the performance of the lithium ion power battery directly determines the development key of the new energy automobile. When the lithium ion battery is charged, lithium ions are extracted from the positive electrode, and are embedded into the negative electrode graphite, and the negative electrode expands; during discharging, lithium ions are extracted from the negative electrode and are embedded into the layered positive electrode material, and the expansion of the negative electrode is relieved; meanwhile, in the aging process of the battery, the electrolyte can generate gas to increase the thickness of the battery. This not only affects the electrochemical performance and service life of the cell, but also has a large impact on the reliability design of the module. Experiments prove that the performance of the battery cell is greatly improved in performance maintenance and cycle life compared with the case of no pretightening force applied to the battery cell.
In the actual assembly process, the battery core is firstly added into the outer frame, then the pretightening force is applied to the outer frame from the side surface,
the excellent outer frame design needs to simultaneously meet two aspects of easy assembly and good pretightening force application. At present, the outer frame structure of the soft package battery module is commonly provided with an n, a u and an opening; all three of the above structures have some technical and structural drawbacks. In order to enable the outer frame to continuously apply pretightening force to the battery cell, the technical scheme that the size of the battery cell is equal to or slightly larger than the size of the inner part of the outer frame is favorable, but in the actual operation process, if the size of the battery cell is larger than or equal to the size of the outer frame, because the outer frame structure and the battery cell are rigid structures, the elastic deformation is small, the installation is very difficult, the battery cell is difficult to put into the outer frame by manpower, and if a mechanical tool is used for applying mechanical force, on one hand, the outer frame or the battery cell is easy to damage, on the other hand, the tool is difficult to enter or withdraw from the outer frame, and the defect is particularly.
If the size of the battery cell is smaller than that of the outer frame, although the assembly efficiency can be improved, under the condition, the pre-tightening force is absorbed by the outer frame, the pre-tightening force application effect is poor, and after the outer frame absorbs the pre-tightening force, deformation is easily generated due to the fact that corresponding pressure is not applied to the inner side of the outer frame, and the product is not in accordance with the design requirement.
Therefore, for the existing three outer frame structures of 'n', 'u' and 'opening', the assembly efficiency and the effective applied pretightening force are irreconcilable contradictions.
CN 109346630A discloses a laminate polymer battery module structure, including an aluminum shell frame (9), characterized by also including an integrally formed reverse S-shaped aluminum plate (8), the upper end face, the lower end face and the opening position of the reverse S-shaped aluminum plate (8) are filled with a laminate polymer battery core pack; the soft-package battery core group comprises two soft-package battery cores (12); the soft package battery cell (12) and the reverse S-shaped aluminum plate (8) are fixed and then integrally inserted into the aluminum shell outer frame (9), and the side surface of the reverse S-shaped aluminum plate (8) is in contact with the inner side surface of the aluminum shell outer frame (9); an integrated cover plate (7) is arranged at one end of the aluminum shell outer frame (9), and a tab (6) of the soft package battery cell (12) is embedded into the integrated cover plate (7) and led out through an insulating plate (3), and then is fixedly sealed through a right insulating cover plate (2) and a right fixed end plate (1); the other end part of the aluminum shell outer frame (9) is fixedly sealed through a left insulating cover plate (11) and a left fixed end plate (10); the reverse S-shaped aluminum plate (8) is of an integrally formed structure. The soft package battery is simple in assembly process and easy to operate, and the production efficiency of products is improved.
CN 109411667A discloses laminate polymer battery module, its characterized in that: the soft package battery comprises a bottom plate, a protection frame assembly, at least two soft package battery cores arranged in parallel, at least one first insulating plate, at least one second insulating plate, at least one first busbar used for leading out the positive electrode of each soft package battery core and at least one second busbar used for leading out the negative electrode of each soft package battery core, wherein the protection frame assembly is arranged on the bottom plate in a surrounding manner, the first insulating plate, the second insulating plate, the first busbar and the second busbar are arranged on the bottom plate, a spacing piece used for heat insulation is arranged between the soft package battery cores, the bottom of each soft package battery core is connected to the bottom plate through a heat-conducting adhesive material, the positive lug of each soft package battery core is connected with the first side face of the first busbar through a first adhesive, and the negative lug of each soft package battery core is connected with the first side face of the second busbar through the first adhesive, the second side surface of the first busbar is fixedly connected with the first side surface of the first insulating plate through the first adhesive, the second side surface of the second busbar is fixedly connected with the first side surface of the second insulating plate through the first adhesive, and the second side surface of the first insulating plate and the second side surface of the second insulating plate are respectively and fixedly connected to the inner side of the protective frame assembly through the second adhesive. The gap between the insulation board of this laminate polymer battery module and the busbar, between busbar and the laminate polymer battery core is filled with first adhesive, and the insulation board bonds through the second adhesive with the curb plate and is in the same place, and frame and other the structure that plays the fixed action in the current battery module can be replaced to first adhesive and second adhesive, are guaranteeing still to have reduced laminate polymer battery module's weight by a wide margin after the fixed of battery module structure. However, the positional relationship of the plates of the module is revealed only by the explosion diagram, the connection relationship of the plates and the blocks of the module is not involved, and the problem that the module cannot be installed and pre-tightened cannot be solved.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned problem that exists among the prior art, the utility model aims to provide a laminate polymer battery module especially lies in providing a laminate polymer battery module convenient to pretension and assembly.
In order to achieve the purpose, the utility model adopts the following technical proposal:
in a first aspect, the utility model provides a soft package battery module, the soft package battery module comprises a battery cell group, a left side plate, a right side plate, an upper cover plate, a lower cover plate, a front side plate and a rear side plate, wherein the left side plate and the right side plate are arranged outside the battery cell group;
the left and right side plates are detachably connected with the upper and lower cover plates in an interference fit manner, or the left and right side plates are detachably connected with the front and rear side plates in an interference fit manner, so that the left and right side plates are continuously restrained by the upper and lower cover plates or the front and rear side plates to generate pressure for clamping the battery cell so as to tighten the battery cell, wherein the pressure is 5-300 kPa;
the left side plate, the right side plate, the upper cover plate, the lower cover plate, the front side plate and the rear side plate can be detachably connected to package the battery cell to form a soft package battery module;
the battery pack comprises foam, the left side plate and the right side plate are parallel to or in the same direction with the plane of the battery piece, and the front side plate and the rear side plate are perpendicular to the left side plate, the right side plate and the horizontal plane.
The utility model discloses an among the laminate polymer battery module, control the curb plate and continuously receive about the restraint of apron and produce the pressure that presss from both sides tight electric core.
The utility model discloses an among the laminate polymer battery module, electric core group includes a plurality of (also at least two) electric cores, and two at least electric cores are a set of, and the interval is provided with the bubble cotton between every group electric core.
The utility model discloses a soft-packaged battery module, curb plate about with about or curb plate about with curb plate pass through adjustable, detachable cooperation is connected and forces tight inside electric core group, about curb plate and contain the cotton inside electric core group of bubble be in the clamping state, about or curb plate can be dismantled interference fit with about with curb plate and be connected about, make about the curb plate continuously receive about or the restraint of curb plate and produce the pressure that presss from both sides tight electric core, about the curb plate further give electric core with pressure transmission, make electric core receive corresponding pretension pressure all the time in assembling process, the problem that electric core inflation brought has effectively been overcome.
The utility model discloses in, left side board and right side board set up relatively, and the upper cover plate sets up relatively with lower apron, and preceding curb plate sets up relatively with the posterior lateral plate.
Preferably, the front and rear side panels are in any one of two forms:
the front side plate and the rear side plate are front end cover assembling plates and rear end cover assembling plates which are arranged oppositely;
secondly, the front and rear side plates include: the relative front end housing assembly plate and the rear end housing assembly plate that set up to and the relative front shroud assembly plate and the back shroud assembly plate that set up, just front shroud assembly plate and back shroud assembly plate are located respectively front end housing assembly plate and back end housing assembly plate be close to electric core group one side.
As the preferred technical scheme of laminate polymer battery module, the front shroud assembly plate includes the copper bar and supports the board groove of copper bar, electric core line forms complete circuit loop to the copper bar, and the board groove sets up in the front shroud assembly plate, plays the effect that supports the copper bar, keeps apart copper bar and electric core utmost point ear simultaneously, prevents both contacts.
Preferably, the front end cover assembly plate consists of a front end cover and an insulating plate, and the insulating plate physically isolates the copper bars to prevent electric leakage and short circuit.
Preferably, the back shroud assembly plate includes the copper bar and supports the board groove of copper bar, the electric core line forms complete circuit loop on the copper bar, and the board groove sets up in the back shroud assembly plate, plays the effect of supporting the copper bar, keeps apart copper bar and electric core utmost point ear simultaneously, prevents both contacts.
Preferably, the rear end cover assembly plate consists of a rear end cover and an insulating plate, and the insulating plate physically isolates the copper bars to prevent electric leakage and short circuit.
The utility model discloses it is right can dismantle the mode of connecting does not limit, can be the common connected mode of prior art, for example conventional mechanical cooperation mode, preferably include buckle, block or adopt bolt and/or nut to connect. The connection between the left side plate, the right side plate, the upper cover plate and the lower cover plate is used as an example, the contact part of the upper cover plate and the side plate can be set to be a bending part, the distance between the two bending parts of the cover plate is slightly smaller than or equal to the lateral width of the whole module, and the upper cover plate and the side plate form interference fit to form a tight structure. The upper cover plate and the lower cover plate may be provided with protrusions (the shape is not limited, for example, a cone shape) respectively, and the left and right side plates may be provided with grooves capable of accommodating the protrusions, so that the upper and lower cover plates may be engaged with the side plates.
Preferably, the left and right side plates and the upper and lower cover plates/the front and rear side plates are detachably connected to form a joint, and the joint is further connected by welding, so that the frame structure is prevented from being failed due to expansion deformation at the end of the service life of the battery cell, and the welding comprises laser welding.
Preferably, still be provided with the FPC pilot board between upper cover plate and the electric core group, the FPC pilot board includes flexible line way board and FPC backup pad, set up limit structure in the FPC backup pad for fixed flexible line way board, be provided with temperature acquisition piece and voltage acquisition piece on the flexible line way board.
The connection mode and the setting position of the temperature acquisition sheet and the voltage acquisition sheet with the flexible circuit board are known in the art, and technicians can select the temperature acquisition sheet and the voltage acquisition sheet according to the assembly requirements of the battery module, preferably, the temperature acquisition sheet and the voltage acquisition sheet can be connected in a welding mode.
Preferably, heat insulation plates are arranged between the left side plate and the right side plate and the electric core group, and the heat insulation plates are connected with the left side plate and the right side plate through heat conduction structural adhesives.
The heat insulation plate is arranged between the left side plate, the right side plate and the battery cell, so that the influence of high temperature on the performance of the battery cell in the welding (such as laser welding) process of the left side plate, the right side plate, the upper cover plate, the lower cover plate or the front end cover assembly plate and the rear end cover assembly plate can be avoided.
Preferably, the heat insulation plate is made of high-temperature-resistant materials, preferably mica sheets or aerogel with a heat insulation effect, and can resist the high temperature of 1000 ℃ in a short time and resist the high temperature of over 500 ℃ for a long time.
The utility model discloses a laminate polymer battery module forms a whole that has certain intensity and rigidity through modes such as welding and gluing to guarantee the holistic reliability of module.
Preferably, the left and right side plates, the upper and lower cover plates, the front end cover and the rear end cover are made of aluminum materials, preferably high-strength aluminum materials, and the high-strength aluminum materials must satisfy the following two points: when the first side plate, the left side plate and the right side plate are in interference fit with the upper cover plate, the lower cover plate or the front end cover assembly plate and the rear end cover assembly plate, proper deformation is generated; and secondly, the upper and lower cover plates or the front and rear end plates are detachably connected with the left and right side plates and do not deform when pressure is applied to the upper and lower cover plates or the front and rear end plates.
Preferably, the left side plate and the right side plate are formed by stamping or extrusion, the upper cover plate and the lower cover plate are formed by stamping or bending, and the front end cover and the rear end cover are formed by extrusion or casting.
As a preferred technical scheme of laminate polymer battery module, the width of upper and lower apron requires to adjust according to electric core and the cotton pretension of bubble.
In a second aspect, the present invention provides a method for assembling a pouch battery module according to the first aspect, the method includes the following steps:
(1) respectively stacking the left side plate and the right side plate on the side surfaces of the electric core group, and applying pretightening force in the width direction of the module group for clamping;
(2) under the condition of maintaining clamping, the upper cover plate and the lower cover plate are respectively detachably connected with the left side plate and the right side plate, or the front side plate and the rear side plate are respectively detachably connected with the left side plate and the right side plate;
(3) releasing and clamping, wherein the upper cover plate, the lower cover plate, the left side plate and the right side plate are in a close fit state and are pre-tightened, so that the left side plate and the right side plate continuously receive the pressure of the upper cover plate and the lower cover plate pointing to the battery core, the pressure is 5-300kPa, and the left side plate, the right side plate, the upper cover plate, the lower cover plate, the front side plate and the rear side plate can be detachably connected by continuous connection to form a soft package battery module.
The explanation of the step (3) of the present invention is continued as follows: if the upper cover plate and the lower cover plate are connected with the left side plate and the right side plate in the step (2), at least the front side plate and the rear side plate are detachably connected with the left side plate and the right side plate respectively; if the step (2) is connected with the left side plate and the right side plate through the front end cover assembly plate and the rear end cover assembly plate, at least the upper cover plate and the lower cover plate are detachably connected with the left side plate and the right side plate respectively.
The utility model discloses an among the method, if the preceding curb plate includes front end housing assembly plate and front shroud assembly plate, the posterior lateral plate includes rear end housing assembly plate and back shroud assembly plate, then carries out according to following mode:
the front cover plate assembly plate and the rear cover plate assembly plate are connected with the front end cover assembly plate and the rear end cover assembly plate in advance, for example, the front cover plate assembly plate and the rear cover plate assembly plate are detachably connected with the left side plate and the right side plate respectively, then the front cover plate assembly plate and the rear cover plate assembly plate are released and clamped, and finally the upper cover plate, the lower cover plate, the front cover plate assembly plate and the rear end cover plate assembly plate are connected with the left side plate, the right side plate, the upper cover plate assembly plate and the lower cover plate assembly plate.
The pressure testing method comprises the following steps: the battery module after releasing the clamp carries out the measurement of width, obtains width A1, then when removing upper and lower apron, keeps battery module left side or right side fixed, uses pressure device to exert pressure to the other side for battery module width becomes A1, and the pressure that pressure device shows this moment can be understood as being approximately equal to the pressure of upper and lower apron restraint left and right sides board.
The utility model discloses an among the assembly method, the battery cell group that the left and right sides curb plate and inside contained the bubble cotton is in the clamping state when the assembly, and upper and lower apron/front and back curb plate has detachable construction (for example lock structure) with left and right sides apron, and the release is pressed from both sides tightly after can dismantling to connect, and upper and lower apron/front and back curb plate belongs to the interference fit state with left and right sides curb plate this moment.
The utility model discloses abandoned the mode of using in the prior art "n", "u", "mouth" upper and lower cover and curb plate pre-assembling, on the basis of fixed battery electricity core, exert the pretightning force to electric core through the curb plate earlier, then the mode of upper and lower cover and front and back end cover board has been installed again, has avoided electric core size to install inconvenient problem under the condition that is greater than outer frame.
As a preferred technical solution of the method of the present invention, the method further comprises performing the following operations after the step (3): and welding and sealing the joints of the front side plate, the rear side plate, the left side plate, the right side plate, the upper cover plate and the lower cover plate. The upper cover plate, the lower cover plate, the front end cover assembly plate, the rear end cover assembly plate, the left side plate and the right side plate are detachably connected and then welded, and therefore the frame can be prevented from being out of work due to expansion deformation in the end of the service life of the battery cell.
Preferably, the welding comprises laser welding.
As an optimal technical solution of the method of the present invention, the method further comprises a module designing step, the module designing step comprises:
and testing to obtain the pre-tightening force of the battery core and the expansion space of the battery core, and calculating the width of the module according to the pre-tightening force and the expansion space of the battery core.
(a) Method for testing pretightening force F and cell expansion space phi of cell by cell pretightening expansion detection device
(b) According to a pressure-strain curve of the foam, determining the strain x% of the foam under the condition of a pretightening force F, determining the total compression z% of the foam, and calculating the thickness y of the pre-tightened foam according to a formula yx (z% -x%);
(c) calculating the thickness A of the pre-tightened foam according to a formula yx (1-x%) ═ A;
(d) calculating the width of the module according to a formula, wherein the formula is as follows: the module width is the foam thickness size after pretension + electric core size + other spare part sizes, and the size of above-mentioned size means the size along module width direction;
wherein phi is the cell expansion space, y is the thickness dimension of the foam, z% is the total compression amount of the foam, and x% is the pre-tightening compression amount of the foam.
The module design steps provided by the preferred technical scheme can be widely applied to the design of the soft package battery module. Obtain module width dimension through its calculation, make the module, have following advantage: the product structure is simpler, the sizes of parts are small, and the processing precision is easy to guarantee; the product assembly is simple, the assembly can be completed by one-time positioning, and fewer tool fixtures are needed in the assembly process. The module developed by the scheme is sampled, so that the problems that the width size of the soft package battery module cannot be ensured and the assembly process is difficult to realize are perfectly solved; meanwhile, the pre-tightening force of the module is perfectly realized, and the functionality and the reliability of the product are guaranteed.
The utility model discloses in, the cotton pressure-strain curve of bubble is through the cotton size of meeting an emergency of survey bubble under different stress condition to with result fitting one-tenth curve or characteristic equation obtain, be the cotton pressure deformation characteristic of bubble.
Preferably, the other parts comprise any one or a combination of at least two of a heat insulation board, a frame or glue.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) this application has abandoned "n", "u", "three kinds of frame structures of mouth" apron about with three or four combinations formation integrated device of curb plate, with the technical scheme of electric core "stopper" income this kind of structure, the utility model provides a detachable laminate polymer battery outer frame, outer frame includes apron about, curb plate and curb plate around, six parts that correspond are independent structure, these six parts can be dismantled and connect (for example through block device interconnect each other) and form laminate polymer battery outer frame. Simultaneously, weld and assemble in order to each detachable board in the frame better to and improve heat exchange efficiency in electric core use, the utility model also provides a holistic laminate polymer battery module and design.
(2) The method of the utility model, because the left and right side plates are firstly stacked on the side of the cell group, the tool can apply the required pre-tightening to the cell, and the overall performance of the battery is greatly improved through the proper pre-tightening; and simultaneously, the cooperation design method, because upper and lower apron and front and back curb plate design according to actual size, consequently, the overall assembly efficiency of battery obtains very big improvement, because of size problem when apron or front and back end cover board about can not having the assembly, lead to the unable puzzlement that gets into or withdraw from of frock.
Drawings
FIG. 1 is an exploded view of the detachable module of the present invention;
FIG. 2 is a schematic view of the fastening structure of the detachable module of the present invention, wherein the upper and lower cover plates are connected to the left and right side plates;
FIG. 3 is a schematic structural view of the FPC assembly board of the present invention;
FIG. 4 is a schematic structural view of a front cover plate assembly plate of the present invention;
FIG. 5 is a schematic structural view of the front end cover assembly plate of the present invention;
FIG. 6 is a PU foam stress-strain fit curve for calculating x% of the foam pre-tightening compression;
the device comprises a base, a front cover plate, a rear cover plate, a right side plate, a heat-conducting structure adhesive, a 7-electric core group, a 8-lower cover plate, a front cover plate, a rear cover plate.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "front", "inner", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Example 1
The embodiment provides a soft package battery module, in particular to a detachable module, an explosion diagram of which is shown in fig. 1, wherein the soft package battery module comprises a battery cell group 7, a left side plate, a right side plate, an upper cover plate, a lower cover plate, a front side plate and a rear side plate, which are arranged on the outer side of the battery cell group 7;
the left and right side board includes relative left side board 11 and the right side board 5 that sets up, upper and lower apron is including relative upper cover plate 1 and the lower apron 8 that sets up, the front and back curb plate includes: the front end cover assembly plate 10 (shown in a structural schematic view in fig. 5) and the rear end cover assembly plate 3 are oppositely arranged, and the front cover plate assembly plate 9 (shown in a structural schematic view in fig. 4) and the rear cover plate assembly plate 4 are oppositely arranged, and the front cover plate assembly plate 9 and the rear cover plate assembly plate 4 are respectively positioned on one sides, close to the electric core group, of the front end cover assembly plate 10 and the rear end cover assembly plate 3;
the front cover plate assembly plate 9 comprises a copper bar 17 and a plate groove 18 for supporting the copper bar 17, the electric core group 7 is connected to the copper bar 17 through a line to form a complete circuit loop, the plate groove 18 is arranged in the front cover plate assembly plate 9 to play a role in supporting the copper bar 17, and the copper bar 17 and an electric core lug are isolated simultaneously to prevent the contact between the two.
The front end cover assembly plate 10 is composed of an end cover 20 and an insulating plate 19, and the insulating plate 19 physically isolates the copper bar 17 to prevent electric leakage and short circuit.
Rear shroud assembly plate 4 includes copper bar 17 and the board groove 18 that supports copper bar 17, on copper bar 17 was connected to the line of electric core group 7, formed complete circuit loop, board groove 18 sets up in front shroud assembly plate 4, plays the effect that supports copper bar 17, keeps apart copper bar 17 and electric core utmost point ear simultaneously, prevents both contacts.
The rear end cover assembly plate 3 consists of an end cover 20 and an insulating plate 19, and the insulating plate 19 physically isolates the copper bar 17 to prevent electric leakage and short circuit.
Still be provided with FPC assembly panel 2 (the structure schematic diagram refers to fig. 3) between upper cover plate 1 and the electric core group 7, FPC assembly panel 2 includes flexible line way board 15 and FPC backup pad 16, set up limit structure 14 in the FPC backup pad 16 for fixed flexible line way board 15, be provided with temperature acquisition piece 13 and voltage acquisition piece 12 on the flexible line way board 15, the temperature acquisition piece is used for gathering temperature information, the voltage acquisition piece is used for gathering voltage information.
And heat insulation plates 21 are arranged between the left side plate 11 and the right side plate 5 and between the electric core group 7 and are connected through heat conduction structural adhesive 6.
The left and right side plates are connected with the upper and lower cover plates in an interference fit manner through a clamping structure (see fig. 2 for a structural schematic diagram), so that the left and right side plates continuously bear the pressure of the upper and lower cover plates pointing to the battery cell, and the battery cell is tightly forced, wherein the pressure is 5-300 kPa;
the left side plate, the right side plate, the upper cover plate, the lower cover plate, the front side plate and the rear side plate are connected through clamping to package the battery cell, so that a soft package battery module is formed;
the electric core group 7 comprises foam, the left side plate and the right side plate are parallel to or in the same direction with the plane of the battery piece, and the front side plate and the rear side plate are perpendicular to the left side plate, the right side plate and the horizontal plane.
Example 2
The embodiment provides an assembling method of the pouch battery module described in embodiment 1, including the following steps:
(1) modular design
The present embodiment uses a VDA355 module with the module size: 355 multiplied by 151 multiplied by 108.5mm, and the cell size is as follows: 310X 102X 11 mm; all cell thicknesses: 11 × 12 ═ 132mm, sum of thicknesses of other parts (insulation board and adhesive): 9 mm.
(a) And testing the cell pretightening force F and the cell expansion space phi by using a battery cell detection device. The optimum pretension force F of the cell was measured to be 30KPa and the cell expansion space phi was 5%.
(b) According to the pressure-strain curve of the selected foam material (PU selected in this example) as shown in fig. 6 (stress on the ordinate and strain on the abscissa), it is determined that the pre-tightening compression x% of the foam is 15% at a pressure of 30KPa, and the cell gradually expands to phi with the use of the battery, so that the total compression of the foam can be understood as the maximum value of the strain in fig. 6, that is, z% is 71%.
According to the equation yx (1-x%) ═ a,
calculating y x (z% -x%) ═ phi to obtain the dimension A of the pre-tightened foam, which is 10mm, and integrating the width of the module, the dimension of the pre-tightened foam, the dimension of the battery cell and the dimensions of other parts, which is 151 mm;
wherein A is the dimension of the foam after pre-tightening, y is the thickness dimension of the foam, x% is the pre-tightening compression amount of the foam, z% is the total compression amount of the foam, and phi is the cell expansion space;
(2) the left side plate 11 and the right side plate 5 are attached to the side face of the electric core group 7 through a tool, and pretightening force is applied to clamp the electric core group;
(3) then, adhering an FPC (flexible printed circuit) assembling plate 2 between the upper cover plate 1 and the electric core group 7 under the condition of maintaining clamping, adhering heat insulation plates 21 between the left side plate 11 and the electric core group 7 and between the right side plate 5 and the electric core group 7 respectively, and clamping the upper cover plate 1, the lower cover plate 8, the left side plate 11 and the right side plate 5, wherein the clamping is realized by arranging a matching structure 22 on the corresponding edge of the plates (the clamping structure is schematically shown in figure 2);
(4) then the assembly plates are clamped with a front cover plate assembly plate 9, a rear cover plate assembly plate 4, a front end cover assembly plate 10 and a rear end cover assembly plate 3 to form a complete soft package battery module;
(5) the joint of the front end cover assembly plate 10, the rear end cover assembly plate 3, the upper cover plate 1, the lower cover plate 8, the left side plate 11 and the right side plate 5 is welded and sealed.
The applicant states that the present invention is described in detail by the above embodiments, but the present invention is not limited to the above detailed method, i.e. the present invention is not meant to be implemented by relying on the above detailed method. It should be clear to those skilled in the art that any improvement of the present invention, to the equivalent replacement of each raw material of the present invention, the addition of auxiliary components, the selection of specific modes, etc., all fall within the protection scope and disclosure scope of the present invention.
Claims (10)
1. The soft package battery module is characterized by comprising a battery cell group, a left side plate, a right side plate, an upper cover plate, a lower cover plate, a front side plate and a rear side plate, wherein the left side plate, the right side plate, the upper cover plate and the lower cover plate are arranged on the outer side of the battery cell group;
the left and right side plates are detachably connected with the upper and lower cover plates in an interference fit manner, or the left and right side plates are detachably connected with the front and rear side plates in an interference fit manner, so that the left and right side plates are continuously restrained by the upper and lower cover plates or the front and rear side plates to generate pressure for clamping the battery cell, thereby tightening the battery cell;
the left side plate, the right side plate, the upper cover plate, the lower cover plate, the front side plate and the rear side plate can be detachably connected to package the battery cell to form a soft package battery module;
the battery pack comprises foam, the left side plate and the right side plate are respectively arranged on the left side plate and the right side plate, the upper cover plate and the lower cover plate are respectively arranged on the upper cover plate and the lower cover plate, the front side plate and the rear side plate are respectively arranged on the left side plate and the right side plate, the left side plate and the right side plate are parallel to the plane of the battery piece or are in the same direction, and the front side plate and the rear side plate are perpendicular to the.
2. The laminate battery module according to claim 1, wherein the front and rear side plates are in any one of two forms:
the front side plate and the rear side plate are front end cover assembling plates and rear end cover assembling plates which are arranged oppositely;
secondly, the front and rear side plates include: the battery pack comprises a front end cover assembling plate, a rear end cover assembling plate, a front cover plate assembling plate and a rear cover plate assembling plate, wherein the front end cover assembling plate and the rear end cover assembling plate are oppositely arranged, the front cover plate assembling plate and the rear cover plate assembling plate are oppositely arranged, and the front cover plate assembling plate and the rear cover plate assembling plate are respectively positioned on one side, close to the battery core, of the front end cover assembling plate and the rear end cover.
3. The laminate battery module of claim 2, wherein the front cover plate assembly plate comprises a copper bar and a plate groove for supporting the copper bar, the battery cell is connected to the copper bar to form a complete circuit loop, and the plate groove is arranged in the front cover plate assembly plate to support the copper bar and isolate the copper bar from a tab of the battery cell to prevent the copper bar and the tab from contacting with each other;
the front end cover assembly plate consists of a front end cover and an insulating plate, and the insulating plate physically isolates the copper bar to prevent electric leakage and short circuit;
the rear cover plate assembly plate comprises a copper bar and a plate groove for supporting the copper bar, the electric core is connected to the copper bar in a wiring mode to form a complete circuit loop, and the plate groove is arranged in the rear cover plate assembly plate and plays a role in supporting the copper bar, and meanwhile, the copper bar and an electric core lug are isolated to prevent the copper bar and the electric core lug from contacting;
the rear end cover assembly plate is composed of a rear end cover and an insulating plate, and the insulating plate physically isolates the copper bar to prevent electric leakage and short circuit.
4. The laminate battery module according to claim 1, wherein the detachable connection means comprises a snap, a snap or a bolt and/or a nut connection.
5. The laminate battery module of claim 1, wherein the left and right side plates are further connected with the upper and lower cover plates/the front and rear side plates at the detachable connection positions by welding.
6. The laminate polymer battery module of claim 1, wherein an FPC assembly board is further arranged between the upper cover plate and the cell group, the FPC assembly board comprises a flexible circuit board and an FPC supporting plate, a limiting structure is arranged on the FPC supporting plate and used for fixing the flexible circuit board, and a temperature acquisition piece and a voltage acquisition piece are arranged on the flexible circuit board.
7. The soft package battery module according to claim 1, wherein heat insulation plates are arranged between the left side plate and the right side plate and the electric core group, and the heat insulation plates are connected with the left side plate and the right side plate through heat conduction structural adhesives.
8. The laminate battery module of claim 2, wherein the left and right side plates, the upper and lower cover plates, and the front and rear end cap assembly plates are aluminum.
9. The laminate polymer battery module of claim 2, wherein the left and right side plates are formed by stamping or extrusion, the upper and lower cover plates are formed by stamping or bending, and the front and rear end cover assembly plates are formed by extrusion or casting.
10. The soft package battery module of claim 1, wherein the widths of the upper and lower cover plates are adjusted according to the pre-tightening requirements of the battery cell and the foam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020313908.9U CN212848665U (en) | 2020-03-13 | 2020-03-13 | Laminate polymer battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020313908.9U CN212848665U (en) | 2020-03-13 | 2020-03-13 | Laminate polymer battery module |
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| Publication Number | Publication Date |
|---|---|
| CN212848665U true CN212848665U (en) | 2021-03-30 |
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| CN202020313908.9U Active CN212848665U (en) | 2020-03-13 | 2020-03-13 | Laminate polymer battery module |
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| CN (1) | CN212848665U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114552053A (en) * | 2021-09-08 | 2022-05-27 | 万向一二三股份公司 | High-integration-level battery pack |
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2020
- 2020-03-13 CN CN202020313908.9U patent/CN212848665U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114552053A (en) * | 2021-09-08 | 2022-05-27 | 万向一二三股份公司 | High-integration-level battery pack |
| CN114552053B (en) * | 2021-09-08 | 2023-09-05 | 万向一二三股份公司 | High-integration battery pack |
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