CN217158351U - Laminate polymer battery module - Google Patents

Abstract

The utility model relates to a soft package battery module, which belongs to the technical field of soft package battery modules, and comprises single batteries arranged in groups and an upper cover plate arranged above each single battery; the battery pack is characterized by also comprising a busbar support plate positioned between the upper cover plate and the top of the single battery, wherein a busbar for connecting the lugs of the single battery is arranged on the busbar support plate, lug through holes are formed in the busbar support plate, and the lugs penetrate through the lug through holes and are welded and fixed on the busbar; the upper cover plate is a metal cover plate, the soft package battery module further comprises an insulating interlayer arranged on the inner side of the upper cover plate, and the insulating interlayer is a heat conduction interlayer and is used for conducting heat in the single battery to the upper cover plate through a lug and/or conducting heat to the upper cover plate through the lug and a busbar. The utility model discloses effectively solved among the prior art the inside heat radiating efficiency of battery low, the problem that the difference in temperature is big.

Description

Laminate polymer battery module

Technical Field

The utility model belongs to the technical field of the laminate polymer battery module, concretely relates to heat dissipation of laminate polymer battery module.

Background

In recent years, the lithium battery industry in China is rapidly developed, more and more industries adopt lithium batteries as energy sources, such as a motorcycle starting power supply, an automobile starting power supply, a plant protection unmanned aerial vehicle power supply, a part of special power supplies and the like, and a plurality of single batteries arranged in groups can form a soft battery module for forming the power supply through a series-parallel connection mode. The utility model discloses a many cluster list and laminate polymer battery module that current soft battery module for example the chinese utility model patent of the authorization bulletin number CN210956822U discloses, for example again the chinese utility model patent of the authorization bulletin number CN212380463U discloses a laminate polymer battery cell battery module, foretell laminate polymer battery module is including the upper cover plate that is located the monomer battery top, be located the PCB board between monomer battery and the upper cover plate, it perforates to be equipped with utmost point ear on the PCB board, the mass flow body of being connected with the utmost point ear of battery has in the monomer battery, and utmost point ear from the utmost point ear perforation pass and according to the cluster parallel relation of settlement and the utmost point ear welded fastening that corresponds.

For a power supply with the characteristics of high battery discharge rate, large discharge current, high temperature rise, large temperature difference and the like in the use process, the battery can generate higher temperature in the use process, and the high temperature can seriously influence the service life and safety of the battery, so that an efficient heat dissipation structure needs to be designed, the battery can operate in a proper temperature range, the temperature difference among the batteries is reduced as much as possible, and the temperature distribution among the batteries is uniform as much as possible.

Because the inside of the battery is generally formed by circularly superposing three layers of a positive plate, a negative plate and a diaphragm, and because the heat conductivity coefficient of the battery in the thickness direction is lower than the heat conductivity coefficient of the battery in the thickness direction, the heat of the central part of the battery is difficult to dissipate to the two sides of the central part of the battery in the thickness direction, and further the temperature of the central part of each single battery in the thickness direction is higher, so that the heat dissipation efficiency of the battery is low, the temperature difference is large, and the service life and the safety of the battery are influenced. Although the aluminum heat conducting sheet is added between the cells in the prior art, and the heat generated by the cells is taken out through the aluminum heat conducting sheet, the heat dissipation performance is limited due to the limitation of the heat conductivity coefficient in the thickness direction.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a laminate polymer battery module to solve among the prior art battery inside heat radiating efficiency low, the problem that the difference in temperature is big.

In order to achieve the above object, the utility model provides a laminate polymer battery module adopts following technical scheme:

a soft package battery module comprises single batteries arranged in groups and an upper cover plate arranged above the single batteries in groups; the battery pack is characterized by also comprising a busbar support plate positioned between the upper cover plate and the top of the single battery, wherein a busbar for connecting the lugs of the single battery is fixed on the busbar support plate, lug through holes are formed in the busbar support plate, and the lugs on the single battery penetrate through the lug through holes and are welded and fixed on the busbar; the upper cover plate is a metal cover plate, the soft package battery module further comprises an insulating interlayer arranged on the inner side of the upper cover plate, and the insulating interlayer is a heat conduction interlayer and used for conducting heat in the single battery to the upper cover plate through a lug and/or conducting heat to the upper cover plate through the lug and a busbar.

The beneficial effects of the above technical scheme are that: the soft package battery module in the utility model sets the upper cover plate as the metal cover plate, and sets the insulation interlayer as the heat conduction interlayer between the upper cover plate and the top of the single battery, because the insulation interlayer is clamped between the upper cover plate and the busbar and/or the pole ear, and because the pole ear of the single battery passes through the pole ear perforation and is welded and fixed with the busbar, in the using process of the soft package battery module, when the single battery generates heat, the heat in the central part of the single battery can be transmitted to the pole ear through the current collector connected with the pole ear, and the heat in the single battery is transmitted to the upper cover plate through the pole ear and/or transmitted to the upper cover plate through the pole ear and the busbar through the insulation interlayer, the heat in the middle part of the battery thickness direction is led out through the pole ear, compared with the prior art which depends on the heat radiation structure arranged outside the single battery, because utmost point ear is connected with the mass flow body in the battery monomer, and the mass flow body can be derived the heat at monomer battery thickness direction middle part, consequently not only can dispel the heat to the upper cover plate with the heat transfer of battery inside fast like this, is favorable to improving the inside radiating efficiency of battery, also can slow down the decay rate of battery life-span simultaneously, is favorable to improving the safety in utilization of battery.

Further, the insulating interlayer is formed of a thermally conductive pad.

The beneficial effects of the above technical scheme are that: the heat conducting pad is used as the insulating interlayer, and the heat conducting pad is simple in structure, so that the manufacturing of the insulating interlayer is facilitated, and meanwhile, the assembly of the insulating interlayer between the upper cover plate and the single battery is facilitated.

Further, the heat conduction pad is bonded and fixed on the tab and/or the bus bar.

The beneficial effects of the above technical scheme are that: through the mode of bonding, not only can realize the accurate positioning of heat conduction pad assembly, be favorable to making things convenient for the assembly of heat conduction pad, also can guarantee the reliable contact of heat conduction pad and utmost point ear or busbar simultaneously, be favorable to realizing the heat conduction between utmost point ear or busbar and the heat conduction pad.

Further, the bus bar forms a local protrusion on the bus bar support plate, and the insulating spacer has a convex-concave structure that fits the bus bar and the bus bar support plate.

The beneficial effects of the above technical scheme are that: the convex-concave structure matched with the insulating interlayer is arranged on the insulating interlayer, so that the assembly of the insulating interlayer can be positioned, the reliable close contact between the insulating interlayer and a bus bar or a lug can be ensured, and the heat transfer and heat dissipation of the single battery can be ensured.

Furthermore, an insulating layer is arranged on the inner side surface of the upper cover plate.

The beneficial effects of the above technical scheme are that: the insulating layer is arranged, so that the insulating protection between the upper cover plate and the battery is favorably improved, the protection performance between the battery and the upper cover plate is further improved, and the influence on safe use caused by the short circuit between the battery and the upper cover plate due to the electric connection is avoided.

Furthermore, the busbar supporting plate is an aluminum substrate, and an insulating layer is arranged on the hole wall of the lug hole on the aluminum substrate and used for isolating the aluminum substrate from the lug.

The beneficial effects of the above technical scheme are that: the aluminum substrate has a better heat dissipation effect, so that heat in the battery can be better transferred out through the aluminum substrate, the inside of the battery can be better dissipated, and the temperature equalization of the battery is ensured; the hole wall of the lug through hole is provided with an insulating layer for isolating the aluminum substrate from the lug, so that the problem of short circuit caused by electric connection between the aluminum substrate and the lug can be avoided.

Further, the bus bar is a copper bar, and the copper bar is fixed on the aluminum substrate through tin soldering.

The beneficial effects of the above technical scheme are that: the copper bar is used as the bus bar, and the heat conductivity of the copper bar is better, so that the resistance is smaller, the soft package battery module can generate less heat, and the safety and the usability of the battery are further ensured; fix the copper bar on aluminium base board with the mode of soldering, so not only the copper bar has better fixed effect, also can realize thermal timely conduction simultaneously, guarantees the radiating efficiency of battery.

Further, laminate polymer battery module is including setting up the heat-conducting plate in each battery cell thickness direction one side, and the heat-conducting plate includes the plane part with the laminating of battery cell side, and the edge of plane part in battery cell width direction both sides all is equipped with the part of bending that extends towards battery cell direction one side, and the size of the part of bending is less than corresponding battery cell's thickness.

The beneficial effects of the above technical scheme are that: the heat conducting plate jointed with the single battery can transfer the heat on the battery to the heat conducting plate, so that the heat dissipation of the battery can be further realized through the plane part and the bending part of the heat conducting plate, and the heat dissipation effect of the battery is further ensured; the thickness that the size setting of part will bend is less than corresponding battery cell to this can guarantee the contact of battery cell and adjacent battery cell's heat-conducting plate, can further increase the radiating efficiency of battery.

Furthermore, the upper cover plate is provided with a downward folded edge which is used for being lapped with the bending part of the heat conducting plate and forming heat transfer with the bending part of the heat conducting plate.

The beneficial effects of the above technical scheme are that: through the lap joint of the downward-turning hem of the upper cover plate and the bending part of the heat-conducting plate, the contact area between the heat-conducting plate and the upper cover plate can be increased, the heat transfer area between the heat-conducting plate and the upper cover plate can be further increased, and the heat dissipation effect of the battery can be further guaranteed.

Furthermore, the busbar support plate is provided with an injection hole, and the injection hole is used for injecting insulating heat-conducting glue into a space surrounded by the heat-conducting plate, the top end face of the single battery and the busbar support plate.

The beneficial effects of the above technical scheme are that: through heat-conducting glue, not only can the heat transfer between battery and the busbar backup pad and the fixation of busbar backup pad be realized, simultaneously also can guarantee the insulation protection between busbar backup pad and the battery, further guaranteed the safety and usability of battery.

Drawings

Fig. 1 is a perspective view of a soft package battery module in the present invention;

fig. 2 is an exploded view of the soft-package battery module of the present invention;

fig. 3 is a schematic diagram of a busbar assembly in the soft-package battery module of the present invention;

fig. 4 is a perspective view of the heat conducting pad in the soft-packaged battery module of the present invention (viewed from the bottom of the heat conducting pad upwards);

fig. 5 is a perspective view of the heat-conducting plate in the soft-package battery module of the present invention.

In the figure: 10. a single battery; 11. a tab; 20. a heat conducting plate; 21. a first bending portion; 22. a second bent portion; 23. a planar portion; 30. a bus bar assembly; 31. a bus bar; 32. punching a tab; 33. injecting glue holes; 34. a busbar support plate; 40. a thermally conductive pad; 50. an upper cover plate; 51. and turning the edge downwards.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clear, the present invention is further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

It is noted that, in the embodiments of the present invention, relational terms such as "first" and "second", and the like, which may be present in the embodiments, are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between the entities or operations. Also, terms such as "comprises," "comprising," or any other variation thereof, which may be present, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the statement that "comprises a" … …, "or the like, may occur does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from the specific situation.

In the description of the present invention, unless otherwise explicitly specified or limited, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from the specific situation.

The present invention will be described in further detail with reference to examples.

The utility model discloses embodiment 1 of well laminate polymer battery module:

as shown in fig. 1 and 2, the pouch battery module includes single batteries 10 arranged in groups, and further includes a heat conducting plate 20 disposed on one side of each single battery 10 in the thickness direction, and the heat conducting plates 20 are disposed on the same side of each corresponding single battery 10. As shown in fig. 5, the heat conducting plate 20 includes a planar portion 23 attached to a side surface of a corresponding side of the single battery 10, the planar portion 23 is provided with first bent portions 21 extending toward one side of the single battery 10 at edges of two sides of the single battery 10 in the width direction, and the two first bent portions 21 are perpendicular to the planar portion 23; the bottom of the plane part 23 is also provided with a second bending part 22 which is positioned on the same side with the two first bending parts 21, the second bending part 22 is positioned at the bottom of the corresponding single battery 10, the whole heat conducting plate 20 is in a three-surface bending structure through the two first bending parts 21 and the second bending parts 22, the structure not only strengthens the heat conduction inside the single battery 10, but also strengthens the structural strength of the heat conducting plate 20, and the size of each bending part is 2mm smaller than the thickness of the corresponding single battery 10.

The single batteries 10 and the corresponding heat conducting plates 20 are bonded together through heat conducting structural adhesive to form single battery units, and since the single batteries 10 are arranged in groups, the formed single battery units are also arranged in groups and are bonded together through the heat conducting structural adhesive to form a battery module. In addition, the battery module is provided with end plates (not shown) at both sides of the direction in which the single batteries 10 are arranged in groups, and the end plates and the battery module can be fixed by a binding belt, and in other embodiments, can be fixed by other manners, such as welding.

As shown in fig. 1 and 2, each unit cell 10 has two tabs 11 at the top, which are a positive tab and a negative tab, respectively, and a busbar assembly 30 is disposed above the cell module. As shown in fig. 3, the bus bar assembly 30 includes a bus bar support plate 34 and a bus bar 31, wherein the bus bar support plate 34 is mounted and fixed on the support at the corresponding edge through the end plate, and the bus bar support plate 34 is an aluminum substrate, which is a conventional structure in the field of electrical appliances, is a metal-based copper-clad plate with good heat dissipation function, and generally consists of three layers, namely a circuit layer (copper foil), an insulating layer and a metal base layer; the bus bars 31 are rectangular and are copper bars, in this embodiment, the bus bars 31 are made of red copper material, a plurality of bus bars 31 are provided, the plurality of bus bars 31 are divided into two groups arranged side by side, the bus bars 31 in each group are arranged on the bus bar supporting plate 34 in parallel and at intervals, and the bus bars 31 are respectively arranged corresponding to the electrodes of the corresponding single batteries 10 up and down.

As shown in fig. 3, tab through holes 32 are formed in the bus bar support plate 34 on both sides of each bus bar 31 in the width direction, the tab through holes 32 are rectangular holes, each tab through hole 32 is arranged corresponding to a tab 11 of a corresponding single battery 10, the tabs 11 of each single battery 10 correspondingly penetrate the tab through holes 32 from bottom to top until the top of the heat conduction plate 20 contacts the bottom of the bus bar support plate 34, and then the corresponding tab 11 is bent to be tightly attached to the corresponding bus bar 31, and the tabs 11 are welded and fixed to the corresponding bus bar 31 by laser welding. Because the bus bar supporting plate 34 is an aluminum substrate and the hole wall of the tab through hole 32 is provided with an insulating layer, the aluminum substrate and the tab 11 can be isolated by the insulating layer on the hole wall of the tab through hole 32, so as to avoid short circuit between the two due to electrical connection.

Spaces are respectively defined between the assembled bus bar support plates 34 and the top end faces of the corresponding heat conduction plates 20 and the single batteries 10, and air exists in each space and can affect the heat conduction efficiency of the corresponding single batteries 10. As shown in fig. 3, the bus bar support plate 34 is provided with glue injection holes 33 corresponding to the spaces, the glue injection holes 33 allow the insulating and heat-conducting glue to be injected into the corresponding spaces, and the injected insulating and heat-conducting glue can contact with the bottom of the bus bar support plate 34, wherein, the insulating heat-conducting glue is silicon rubber heat-conducting glue, the busbar support plate 34 can be connected with the heat-conducting plate 20 and the single battery 10 into a whole through the insulating heat-conducting glue, and also can exhaust the air in the above space, enhancing the heat transfer between the bus bar assembly 30 and the single battery 10, contributing to the improvement of the heat conduction efficiency and the temperature uniformity of the single battery 10, in addition, insulation protection can be formed between the unit batteries 10 and the bus bar support plate 34 by insulating heat-conducting paste, thereby, it is possible to prevent an insulation failure due to a breakage between the top of the unit cell 10 and the bus bar support plate 34.

As shown in fig. 2, the pouch battery module further includes an upper cover plate 50 disposed above the bus bar assembly 30 and an insulating barrier disposed inside the upper cover plate 50. The insulating interlayer is a heat conducting interlayer, in this embodiment, the insulating interlayer is a heat conducting pad 40 made of silicone, and the heat conducting pad 40 is sandwiched between the upper cover plate 50 and the bus bar 31 and the bent portion of the tab 11 bent to the top surface of the bus bar 31, and is bonded to the tab 11 and the bus bar 31. The heat conduction pad 40 is a customized development member, and since the bus bar 31 is formed with a local protrusion on the bus bar support plate 34, the heat conduction pad 40 has a convex-concave structure (shown in fig. 4) adapted to the bus bar 31 and the bus bar support plate 34, wherein a portion of the heat conduction pad 40 corresponding to the bus bar 31 is thinner, and a portion corresponding to the bus bar support plate 34 is thicker, so that the heat conduction pad 40 can be closely attached to the bus bar assembly 30 and directly contacted with the tab 11 of the single battery 10, the bus bar 31 and the bus bar support plate 34, which is beneficial to reducing the thermal resistance between the bus bar assembly 30 and the heat conduction pad 40 and improving the heat transfer efficiency.

As shown in fig. 2, the upper cover plate 50 is a metal cover plate, in this embodiment, the material of the upper cover plate 50 is a 6-series aluminum alloy, the upper cover plate 50 is tightly attached to the upper portion of the thermal pad 40, the upper cover plate 50 has downward folded edges 51 on both sides of the width direction of the single battery 10, the downward folded edges 51 are used for being overlapped with the first folded portions 21 of the thermal conductive plate 20 and forming heat transfer with the first folded portions 21, so as to further increase the contact area between the thermal conductive plate 20 and the upper cover plate 50, which is beneficial to further ensuring the heat dissipation effect of the battery, and the overlapping area between the first folded portions 21 and the downward folded edges 51 is coated with an insulating thermal conductive adhesive. The length of the downward folded edge 51 of the upper cover plate 50 is 20+ a + B + cm, where a is the thickness of the busbar support plate 34, B is the thickness of the busbar 31, and C is the thickness of the heat conduction pad 40 at the thinner portion corresponding to the busbar 31.

In addition, still be equipped with the insulating layer on the medial surface of upper cover plate 50, in this embodiment, the insulating layer is formed through the insulating processing that sprays paint, sets up the insulating layer, is favorable to improving the insulation protection between upper cover plate 50 and the single cell 10, has further improved the barrier propterty between single cell 10 and upper cover plate 50 promptly to avoid causing the short circuit because of taking place electric connection between single cell 10 and the upper cover plate 50, influence safe handling.

The utility model discloses a soft-package battery module is through setting up the upper cover plate as the metal cover plate, and set up as the heat conduction pad between the top of upper cover plate and monomer battery, because the heat conduction pad is pressed from both sides and is adorned between upper cover plate and busbar and utmost point ear, and because monomer battery's utmost point ear passes utmost point ear perforation and busbar welding is fixed, like this soft-package battery module is in the in-process that uses, when monomer battery generates heat, monomer battery central part's heat can be transmitted to utmost point ear through the mass flow body that is connected with utmost point ear, and through heat conduction pad heat in monomer battery is conducted to the upper cover plate through utmost point ear and busbar, through utmost point ear realize the derivation of the heat at battery thickness direction middle part, compare with the prior art depending on the heat radiation structure who sets up at monomer battery outside, because utmost point ear is connected with the mass flow body in the battery monomer, and the mass flow body can derive the heat at monomer battery thickness direction middle part, therefore, the heat in the battery can be rapidly transferred to the upper cover plate to be radiated, the radiating efficiency in the battery can be improved, the attenuation speed of the service life of the battery can be reduced, and the use safety of the battery can be improved.

The utility model discloses embodiment 2 of well laminate polymer battery module:

the present embodiment is different from embodiment 1 in that in embodiment 1, the size of the portion of the tab 11 bent onto the bus bar 31 is smaller than that of the bus bar 31, that is, the bent portion of the tab 11 does not completely cover the bus bar 31, and at this time, the heat conduction pad 40 is adhesively fixed to the tab 11 and the bus bar 31, and the heat in the unit battery 10 is conducted to the upper cover plate 50 through the tab 11 and is also conducted to the upper cover plate 50 through the tab 11 and the bus bar 31. In the present embodiment, the tab 11 is fixedly connected to the side surface of the bus bar 31, and at this time, the thermal pad 40 is only adhesively fixed on the bus bar 31, and the heat in the single battery 10 is conducted to the upper cover plate 50 through the tab 11 and the bus bar 31.

The utility model discloses embodiment 3 of well laminate polymer battery module:

the present embodiment is different from embodiment 1 in that in embodiment 1, the size of the portion of the tab 11 bent onto the bus bar 31 is smaller than that of the bus bar 31, that is, the bent portion of the tab 11 does not completely cover the bus bar 31, and at this time, the heat conduction pad 40 is adhesively fixed to the tab 11 and the bus bar 31, and the heat in the single battery 10 can be conducted to the upper cover plate 50 through the tab 11 and can also be conducted to the upper cover plate 50 through the tab 11 and the bus bar 31. In the present embodiment, the portion of the tab 11 bent onto the bus bar 31 completely covers the bus bar 31, and at this time, the heat conduction pad 40 is only bonded and fixed to the tab 11, and the heat in the single battery 10 is conducted to the upper cover plate 50 through the tab 11.

The utility model discloses embodiment 4 of well laminate polymer battery module:

this embodiment is different from embodiment 1 in that in embodiment 1, the insulating interlayer is formed of the thermal pad 40. In this example, the insulating spacer may be formed by insulating heat conductive paste injected between the upper cover plate 50 and the bus bar assembly 30 and solidified.

The utility model discloses embodiment 5 of well laminate polymer battery module:

the present embodiment is different from embodiment 1 in that in embodiment 1, a glue injection hole 33 is formed in the busbar support plate 34, and the glue injection hole 33 allows an insulating heat-conducting glue to be injected into a space surrounded by the heat-conducting plate 20, the top end surface of the single battery 10, and the busbar support plate 34. In this embodiment, before assembling the busbar support plate 34, the insulating heat-conducting glue is injected between the top of the single battery 10 and the corresponding heat-conducting plate 20, and after the insulating heat-conducting glue is injected, the busbar support plate 34 is assembled.

The utility model discloses embodiment 6 of well soft board battery module:

the present embodiment is different from embodiment 1 in that in embodiment 1, the upper cover plate 50 has a lower folded edge 51, and the lower folded edge 51 is used to overlap with the bent portion of the heat conductive plate 20. In this embodiment, the upper cover plate 50 is a flat plate structure, the upper cover plate 50 is only tightly attached to the insulating interlayer, and the heat conducting plate 20 is raised and contacts with the upper cover plate 50 to shield the internal components.

The utility model discloses embodiment 7 of well laminate polymer battery module:

the present embodiment is different from embodiment 1 in that, in embodiment 1, the size of the bent portion of the heat conductive plate 20 is smaller than the thickness of the corresponding unit battery 10. In the present embodiment, the heat conductive plate 20 has a bent portion having a size equal to the thickness of the corresponding unit cell 10.

The utility model discloses embodiment 8 of well laminate polymer battery module:

the present embodiment is different from embodiment 1 in that, in embodiment 1, the heat conducting plate 20 includes a flat portion attached to the side surface of the single battery 10, and the flat portion is provided with a bent portion extending toward one side of the single battery 10 at the edges of both sides of the single battery 10 in the width direction. In the present embodiment, the heat conductive plate 20 includes only a flat portion attached to the side of the unit cell 10.

The utility model discloses embodiment 9 of well laminate polymer battery module:

the present embodiment is different from embodiment 1 in that, in embodiment 1, the pouch battery module includes a heat-conducting plate 20 provided on one side in the thickness direction of each unit battery 10. In the present embodiment, the single batteries 10 are bonded and fixed only by the insulating and heat-conducting adhesive.

The utility model discloses embodiment 10 of well laminate polymer battery module:

the present embodiment is different from embodiment 1 in that in embodiment 1, the bus bar supporting plate 34 is an aluminum substrate. In the present embodiment, the bus bar support plate 34 is made of an insulating material, and the bus bar 31 can be fixed on the bus bar support plate 34 by an insulating heat-conducting adhesive.

The utility model discloses embodiment 11 of well laminate polymer battery module:

this embodiment is different from embodiment 1 in that in embodiment 1, the insulating layer is formed by an insulating painting process. In this embodiment, the insulating layer is formed of an insulating film.

The utility model discloses embodiment 12 of well laminate polymer battery module:

the present embodiment is different from embodiment 1 in that in embodiment 1, the insulating spacer has a convex-concave structure that fits the bus bar 31 and the bus bar support plate 34. In this embodiment, the insulating spacer has a flat plate-like structure.

The above description is only for the preferred embodiment of the present invention, and the present invention is not limited thereto, the protection scope of the present invention is defined by the claims, and all structural changes equivalent to the contents of the description and drawings of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A soft package battery module comprises single batteries (10) arranged in groups and an upper cover plate (50) arranged above the single batteries (10); the battery pack is characterized by further comprising a bus bar supporting plate (34) positioned between the upper cover plate (50) and the top of the single battery (10), wherein a bus bar (31) for connecting lugs (11) of the single battery (10) is fixed on the bus bar supporting plate (34), lug through holes (32) are formed in the bus bar supporting plate (34), and the lugs (11) on the single battery (10) penetrate through the lug through holes (32) and are welded and fixed on the bus bar (31); the upper cover plate (50) is a metal cover plate, the soft package battery module further comprises an insulating interlayer arranged on the inner side of the upper cover plate (50), and the insulating interlayer is a heat conduction interlayer and used for conducting heat in the single battery (10) to the upper cover plate (50) through a tab (11) and/or conducting heat to the upper cover plate (50) through the tab (11) and a busbar (31).

2. The pouch battery module according to claim 1, wherein the insulating interlayer is formed of a thermal conductive pad (40).

3. The pouch battery module according to claim 2, wherein the thermal pad (40) is adhesively fixed to the tab (11) and/or the bus bar (31).

4. The pouch battery module according to claim 2 or 3, wherein the bus bar (31) is formed with a local protrusion on the bus bar support plate (34), and the insulating barrier has a convex-concave structure to fit the bus bar (31) and the bus bar support plate (34).

5. The laminate battery module according to any one of claims 1 to 3, wherein an insulating layer is arranged on the inner side surface of the upper cover plate (50).

6. The soft-package battery module according to any one of claims 1 to 3, wherein the bus bar support plate (34) is an aluminum substrate, and an insulating layer is provided on the hole wall of the tab through hole (32) on the aluminum substrate for isolating the aluminum substrate from the tab (11).

7. The soft package battery module according to any one of claims 1 to 3, wherein the bus bar (31) is a copper bar, and the copper bar is fixed on the aluminum substrate by soldering.

8. The laminate polymer battery module according to any one of claims 1-3, wherein the laminate polymer battery module comprises a heat conducting plate (20) arranged on one side of each single battery (10) in the thickness direction, the heat conducting plate (20) comprises a plane part attached to the side face of each single battery (10), the plane part is provided with a bending part extending towards one side of the single battery (10) in the width direction of each single battery (10) at the edges of the two sides of the single battery (10), and the size of the bending part is smaller than the thickness of the corresponding single battery (10).

9. The pouch battery module according to claim 8, wherein the upper cover plate (50) has a lower folded edge (51), and the lower folded edge (51) is adapted to overlap the bent portion of the heat conductive plate (20) and form heat transfer with the bent portion of the heat conductive plate (20).

10. The laminate battery module as recited in claim 8, wherein the busbar support plate (34) is provided with glue injection holes (33), and the glue injection holes (33) are used for injecting insulating heat-conducting glue into a space enclosed by the heat-conducting plate (20), the top end face of the single battery (10) and the busbar support plate (34).

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