CN216850167U - Battery module and battery pack - Google Patents

Abstract

The utility model relates to a battery module and a battery pack, wherein the battery module is provided with a ternary cell unit and a lithium iron cell unit which are alternately arranged; the ternary cell unit is provided with a ternary lithium ion battery cell, and the lithium iron battery cell unit comprises at least one lithium iron phosphate battery cell; two adjacent ternary lithium ion cells are connected in series, two adjacent lithium iron phosphate cells are connected in series, a first ternary output electrode and a first lithium iron output electrode are arranged at the first end of the battery module, and a second ternary output electrode and a second lithium iron output electrode are arranged at the second end of the battery module; the first ternary output electrode and the second ternary output electrode are used for being connected with a ternary lithium ion battery; and the first lithium iron output electrode and the second lithium iron output electrode are used for being connected with the lithium iron phosphate core. The battery module of the utility model has more energy and higher safety; and two adjacent ternary lithium ion battery cores are connected, and two adjacent lithium iron phosphate battery cores are connected, so that the battery module can provide two sets of power supplies with different energy for the battery pack.

Description

Battery module and battery pack

Technical Field

The utility model relates to a new energy automobile technical field, in particular to battery module, simultaneously, the utility model discloses still relate to a battery package with this battery module.

Background

With the increasing severity of energy crisis, the conventional fuel vehicle is gradually replaced by a new energy vehicle, wherein the pure electric vehicle is an important form of the new energy vehicle, and the application of the pure electric vehicle is more and more extensive. With the continuous development and progress of the electric automobile technology, people have higher requirements on the safety and the endurance mileage of the electric automobile. The existing battery modules generally adopt the battery cores of the same system, the same size and the same capacity to carry out grouping, some battery modules have larger energy and longer endurance mileage but higher thermal runaway danger, and some battery modules have better safety but lower energy and shorter endurance mileage. In addition, the existing battery module can only provide one set of power supply for the battery pack generally, and the practicability is poor.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention is directed to a battery module, which not only has more energy, but also has better safety, and the battery module can provide two different power supplies for the battery pack, so as to have better use effect.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a battery module is provided with a ternary cell unit and a lithium iron cell unit which are alternately arranged, wherein the ternary cell unit is provided with a ternary lithium ion cell and comprises at least one lithium iron phosphate cell;

two adjacent ternary lithium ion battery cells are connected in series, and two adjacent lithium iron phosphate battery cells are connected in series;

the first end of the battery module is provided with a first ternary output electrode and a first lithium iron output electrode, and the second end of the battery module is provided with a second ternary output electrode and a second lithium iron output electrode;

the first ternary output electrode is connected with the ternary lithium ion battery at the first end, and the second ternary output electrode is connected with the ternary lithium ion battery at the second end;

the first lithium iron output electrode is connected with the lithium iron phosphate core at the first end, and the second lithium iron output electrode is connected with the lithium iron phosphate core at the second end.

Furthermore, two adjacent ternary lithium ion electric cores are connected through a ternary bus bar, and the first ternary output electrode and the second ternary output electrode are respectively connected with the ternary lithium ion electric core at the corresponding end through a ternary switching bar; adjacent two connect through the lithium iron busbar between the lithium iron phosphate cell, first lithium iron output pole with the second lithium iron output pole links to each other with the lithium iron phosphate cell that corresponds the end through lithium iron switching row respectively.

Further, the battery module also comprises an output electrode protection seat arranged on an end plate of the battery module;

the output electrode protection seat is arranged corresponding to each output electrode, a containing groove is formed in the output electrode protection seat, and each output electrode is connected with an external conductive piece in the containing groove.

Furthermore, the bottom of the output electrode protection seat is provided with an insertion column which is suitable for being inserted into an insertion groove in the top of the end plate.

Furthermore, the inserting column is provided with a fixture block, and the fixture block inserted in the inserting groove is abutted or clamped with the wall surface of the inserting groove.

Further, the output electrode protection seat comprises a cover body and a protection seat body;

the cover body is detachably connected with the protection seat body.

Furthermore, the protection seat body comprises a supporting table and a plurality of bosses arranged along the circumferential direction of the supporting table at intervals, and an opening for allowing an external conductive piece to enter the accommodating groove is formed between every two adjacent bosses.

Further, the ternary bus bar has two connecting sections arranged oppositely; the two connecting sections are respectively connected with the positive pole column and the negative pole column of the two adjacent ternary lithium ion electric cores.

Further, the lithium iron busbar is provided with a groove for avoiding the ternary busbar;

and two ends of the lithium iron busbar are respectively connected with the positive pole column and the negative pole column of the two adjacent lithium iron phosphate cores.

Compared with the prior art, the utility model discloses following advantage has:

the battery module of the embodiment can have more energy by arranging the ternary battery cell units and the lithium iron battery cell units which are alternately arranged; in addition, the lithium iron phosphate battery cells are adopted to separate the ternary lithium ion battery cells, so that the battery module has higher safety, and compared with the existing battery module in which the ternary lithium ion battery cells are separated by adopting a heat insulation material, the cost is lower; moreover, through connecting two adjacent ternary lithium ion battery cores and connecting two adjacent lithium iron phosphate battery cores, the battery module can provide two sets of power supplies with different energy for the battery pack, and therefore the battery module has better practicability.

In addition, the output electrode protection base is arranged on the end plate, so that the reliability of connection between the battery module and an external component can be improved. The arrangement of the plug-in connection column can facilitate the connection between the output electrode protection seat and the end plate. The firmness of connection between the protection seat body and the end plate can be improved by arranging the clamping blocks.

In addition, the ternary bus bar is designed into a U shape, and the area of the ternary bus bar is large, so that the ternary bus bar has good heat dissipation performance. And the groove is arranged on the lithium iron busbar, so that the lithium iron busbar and the ternary busbar can be conveniently arranged. The number of the ternary lithium ion cells is set to be not less than that of the lithium iron phosphate cells, so that the energy of the battery module can be further improved.

The utility model discloses still relate to a battery package, be equipped with in the battery package as above the battery module.

Battery package, through setting up as above battery module, can make this battery package have longer continuation of the journey mileage and higher security to can have two sets of powers, thereby can make this battery package have better result of use.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic structural diagram of a battery module according to a first embodiment of the present invention;

fig. 2 is an exploded view of a battery module according to a first embodiment of the present invention;

FIG. 3 is a top view of FIG. 1;

fig. 4 is a layout diagram of a ternary lithium ion battery cell and a lithium iron phosphate battery cell according to a first embodiment of the present invention;

fig. 5 is an assembly view of the substrate, the ternary bus bar, the lithium iron bus bar, the output electrode, and the flexible circuit board according to the first embodiment of the present invention;

FIG. 6 is a schematic view of the structure of FIG. 5 with the flexible circuit board removed;

fig. 7 is a schematic structural diagram of a substrate according to a first embodiment of the present invention;

fig. 8 is a schematic structural view of a protection seat body according to a first embodiment of the present invention;

fig. 9 is a schematic structural view of the protection seat body according to the first embodiment of the present invention at another viewing angle;

fig. 10 is a schematic structural view of a cover according to a first embodiment of the present invention;

fig. 11 is a schematic structural view of the cover body according to the first embodiment of the present invention at another viewing angle;

fig. 12 is a schematic structural diagram of a ternary bus bar according to a first embodiment of the present invention;

fig. 13 is a schematic structural diagram of a lithium iron bus bar according to a first embodiment of the present invention;

fig. 14 is a schematic view of an arrangement structure between the busbars and the output electrodes according to a first embodiment of the present invention.

Description of reference numerals:

1. an end plate; 2. a side plate; 3. a substrate; 301. a limiting groove; 4. a ternary bus bar; 401. an avoidance groove; 5. a lithium iron bus bar; 6. lithium iron is connected in a switching way;

7. an output electrode protection base;

701. a protection seat body; 7011. a support table; 70111. a fixing hole; 70112. a clamping hole; 70113. a protection plate; 7012. inserting the column; 70121. a clamping block;

702. a cover body; 7021. a top plate; 7022. a side plate; 70221. flanging; 7023. a hook is clamped;

8. ternary switching and arranging; 9. a ternary lithium ion cell; 10. a lithium iron phosphate core; 11. a second lithium iron output electrode; 12. a flexible circuit board; 13. an electrical plug; 14. a second ternary output electrode; 15. a first ternary output pole; 16. a first lithium iron output electrode.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, in the description of the present invention, the terms "mounted," "connected," and "connected" are to be construed broadly unless otherwise specifically limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. To those of ordinary skill in the art, the specific meaning of the above terms in the present invention can be understood in combination with the specific situation.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Example one

The embodiment relates to a battery module, which is provided with a ternary battery cell unit and a lithium iron battery cell unit which are alternately arranged. The ternary battery cell unit is provided with a ternary lithium ion battery cell 9, and the lithium iron battery cell unit comprises at least one lithium iron phosphate battery cell 10. And, two adjacent ternary lithium ion battery cells 9 are connected in series, and two adjacent lithium iron phosphate battery cells 10 are connected in series.

In addition, a first ternary output electrode 15 and a first lithium iron output electrode 16 are arranged at a first end of the battery module, and a second ternary output electrode 14 and a second lithium iron output electrode 11 are arranged at a second end of the battery module. The first ternary output electrode 15 is connected with the ternary lithium ion battery cell 9 at the first end, and the second ternary output electrode 14 is connected with the ternary lithium ion battery cell 9 at the second end. And the first lithium iron output electrode 16 is connected with the lithium iron phosphate cell 10 at the first end, and the second lithium iron output electrode 11 is connected with the lithium iron phosphate cell 10 at the second end.

The battery module of the embodiment can have more energy by arranging the ternary battery cell units and the lithium iron battery cell units which are alternately arranged; in addition, the ternary lithium ion battery cell 9 is separated by the lithium iron phosphate battery cell 10, so that the battery module has high safety, and compared with the existing battery module with the ternary lithium ion battery cell 9 separated by a heat insulation material, the cost is low. Moreover, through establishing ties between two adjacent ternary lithium ion battery cell 9 to and establish ties between two adjacent lithium iron phosphate battery cell 10, can make the battery module provide two sets of power that the energy is different for the battery package, thereby can make this battery module have better practicality.

Based on the above design concept, an exemplary structure of the battery module of the present embodiment is shown in fig. 1 to 3, and generally, the battery module further has two end plates 1 at both ends thereof, and two side plates 2 at both sides thereof. And, both ends of the side plate 2 are connected with the two end plates 1 by welding or other methods, respectively, and fixing holes for fixing the battery modules are formed on the end plates 1. Wherein, when the end plate 1 and the side plate 2 are manufactured specifically, the prior art can be referred to.

As a preferred embodiment, as shown in fig. 4, the lithium iron battery cell unit of the present embodiment includes a lithium iron phosphate battery cell 10, that is, the ternary lithium ion battery cells 9 and the lithium iron phosphate battery cells 10 are arranged alternately one by one, and the thickness ratio of the ternary lithium ion battery cells 9 to the lithium iron phosphate battery cells 10 is between 1 and 15. For example, the thickness ratio of the two may be set to 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 or other values. Through setting up ternary lithium ion cell 9's thickness is greater than lithium iron phosphate cell 10, can make this battery module have great energy. In addition, in this embodiment, for the whole equipment of battery module, adopt the structure to glue between each electric core and link to each other, also can improve battery module's rigidity simultaneously.

In addition, in order to further improve the energy of the battery module, the number of the ternary lithium ion cells 9 is not less than that of the lithium iron phosphate cells 10. In this embodiment, in order to improve the use effect of the battery module, as described above, two adjacent ternary lithium ion batteries 9 are connected in series, and the lithium iron phosphate batteries 10 are connected in series. Specifically, two adjacent ternary lithium ion cells 9 are connected in series through a ternary bus bar 4, and two adjacent lithium iron phosphate cells 10 are also connected in series through a lithium iron bus bar 5.

At this moment, in order to facilitate the connection between the battery cells, as a specific implementation manner, the same poles in any two adjacent ternary lithium ion battery cells 9 are respectively arranged at two sides of the battery module, and meanwhile, the same poles in any two adjacent lithium iron phosphate battery cells are respectively arranged at two sides of the battery module. Also, based on this arrangement structure, as described above, at least a part of the lithium iron bus bar 5 and the ternary bus bar 4 have an overlapping region therebetween, and an insulating layer between the lithium iron bus bar 5 and the ternary bus bar 4 is provided in the overlapping region.

As a specific embodiment, as shown in fig. 5 and 6, the ternary bus bar 4 is specifically stacked above the lithium iron bus bar 5. As described above with reference to fig. 5 and 6, the battery module is provided with the first ternary output electrode 15 and the first lithium iron output electrode 16 at the right end (i.e., the first end) and the second ternary output electrode 14 and the second lithium iron output electrode 11 at the left end (i.e., the second end).

In this embodiment, in order to improve the connection effect between each bus bar and the corresponding electric core, as shown in fig. 1 to 3, a substrate 3 is further disposed on the top of the battery module. As shown in fig. 5 and 6, the ternary bus bars 4 and the lithium iron bus bars 5 are provided on the substrate 3, and the output electrodes are also provided on the substrate 3. In addition, as shown in fig. 5, a flexible circuit board 12 is provided on the base plate 3 at a middle portion thereof, and an electrical plug 13 is provided on the flexible circuit board 12.

Specifically, the substrate 3 has a rectangular structure as shown in fig. 7, and the entire structure is a rectangle that follows the shape of the battery module, and a plurality of through holes corresponding to the explosion-proof valves of the battery cells are formed in the middle of the substrate 3, and a plurality of through holes corresponding to the posts on the battery cells are formed on both sides of the substrate 3. The output electrodes have the same structure and have overlapping ends overlapping on the substrate 3 and overhanging ends overhanging one side of the substrate 3.

In this embodiment, in order to effectively protect each output electrode, as shown in fig. 1 and 2, the battery module further includes an output electrode protection seat 7 provided on the end plate 1. The output electrode protection base 7 is arranged corresponding to each output electrode, and a containing groove is formed in each output electrode protection base 7, and each output electrode is connected with an external conductive piece in the containing groove. Specifically, as shown in fig. 2, the output electrode protection seat 7 of the present embodiment includes a protection seat body 701 and a cover 702 provided on the protection seat body 701, and the cover 702 and the protection seat body 701 are detachably connected.

The structure of the protection seat body 701 is as shown in fig. 8 and fig. 9, and the support includes a supporting base 7011, and four bosses disposed at intervals along the circumferential direction of the supporting base 7011, and a containing groove for containing each output electrode is formed between the four bosses and the supporting base 7011. In addition, in order to realize the connection between each output electrode and the external conductive element, a fixing hole 70111 is formed at the bottom of the accommodating groove, and each output electrode and the external conductive element are connected by a fixing element connected in the fixing hole 70111.

As a feasible implementation manner, the fixing hole 70111 of this embodiment specifically adopts a threaded hole, and the output electrode and the external conductive member are fixedly connected to the protection seat body 701 by screwing a bolt through each output electrode 4 and the external conductive member to the threaded hole. At this time, in order to provide the screw hole, an insert extending to one side of the base plate is inserted into the base plate, and the fixing hole 70111 is formed in the insert.

In addition, in order to facilitate the installation of the output electrode protection base 7 on the end plate 1, a plug-in column 7012 is provided at the bottom of the support 7011, and the plug-in column 7012 is adapted to be inserted into a plug-in groove at the top of the end plate 1. Further, in order to improve the mounting firmness of the protective seat body 701, as shown in fig. 9, the plugging column 7012 of the present embodiment is specifically configured in a triangular prism shape. In addition, in order to improve the reliability of the connection between the plugging column 7012 and the end plate 1, a clamping block 70121 is disposed on the plugging column 7012, and correspondingly, a clamping groove is disposed on a groove wall of the plugging groove. With such an arrangement, the clamping block 70121 can be clamped in the clamping groove when the insertion column 7012 is inserted into the end plate 1. It should be noted that, when the latch 70121 has elasticity, the latch 70121 may not be provided with a latch groove, so as to be abutted against the wall surface of the insertion groove.

Still by in fig. 8 and fig. 9 showing, be equipped with guard plate 70113 between two adjacent bosss of being close to one side of electric core to separate external conductive piece and electric core in the storage tank, thereby can improve battery module's safety in utilization and life. In addition, the adjacent two bosses on the other side are respectively provided with a clamping hole 70112 for clamping connection with a clamping hook 7023 described below.

The structure of the cover 702 of the present embodiment is as shown in fig. 10 and 11, and includes a top plate 7021 covering the top of the accommodating groove, and a side plate 7022 extending to the same side of the top plate 7021. Moreover, in order to better connect the external conductive member, a turn-up 70221 is provided on the side plate 7022. In order to facilitate design and implementation, as a specific implementation manner, the cover 702 of the present embodiment is connected to the protection seat body 701 in a snap-fit manner. For this, as shown in fig. 10, two hooks 7023 are provided at an interval on one side of the cover 702 corresponding to the above-described locking hole 70112. It should be noted that, in addition to the cover 702 being connected to the protection seat body 701 in a snap-fit manner, the cover 702 and the protection seat body 701 may also be connected by screw threads.

In this embodiment, in order to facilitate connection between each output electrode and the ternary lithium ion battery cell 9 and the lithium iron phosphate battery cell 10, a ternary switching row 8 and a lithium iron switching row 6 are further respectively disposed at two ends of the substrate 3. The first ternary output electrode 15 and the second ternary output electrode 14 are respectively connected with the ternary lithium ion battery cell 9 at the corresponding end through the ternary switching row 8. And the first lithium iron output electrode 16 and the second lithium iron output electrode 11 are respectively connected with the lithium iron phosphate cell 10 at the corresponding end through the lithium iron switching row 6. As shown in fig. 3, the ternary switching bar 8 and the lithium iron switching bar 6 at each end may have different structures, and may be arranged as appropriate.

The ternary bus bar 4 of the present embodiment has two oppositely arranged connecting sections, and the two connecting sections are respectively connected with the positive pole and the negative pole of two adjacent ternary lithium ion cells 9. And as a specific embodiment, the ternary bus bar 4 is specifically U-shaped as shown in fig. 12. By forming the ternary bus bar 4 in a U shape, the area thereof is large, and thus the heat dissipation performance can be improved. In addition, the center of the ternary bus bar 4 is also recessed toward one side thereof to form an escape groove 401, so that, as shown in fig. 10, when the ternary bus bar 4 overlaps the lithium iron relay bar 6, the lithium iron relay bar 6 is escaped.

In addition, in order to improve the connection accuracy between the ternary bus bar 4 and the three-element lithium ion cell 9, alignment holes are formed on the two connecting sections respectively, and the two alignment holes are arranged corresponding to the positive pole and the negative pole of the two adjacent three-element lithium ion cells 9 respectively.

As shown in fig. 13, based on the arrangement of the battery cells, as an exemplary structure, the middle of the lithium iron bus bar 5 of the present embodiment protrudes outward to form a groove to avoid the ternary bus bar 4, and two ends of the lithium iron bus bar 5 are respectively connected to the positive pole column and the negative pole column of two adjacent lithium iron phosphate battery cells 10. By providing the groove in the lithium iron bus bar 5, as shown in fig. 14, when the lithium iron bus bar 5 and the ternary bus bar 4 have an overlapping region, contact therebetween can be prevented from affecting signal acquisition.

In addition, in order to improve the connection accuracy between the poles of the lithium iron phosphate busbar 5 and the lithium iron phosphate cores 10, alignment holes are formed at two ends of the lithium iron busbar 5, and the two alignment holes are respectively arranged corresponding to the positive pole and the negative pole of the two adjacent lithium iron phosphate cores 10.

Here, the ternary bus bar 4 may have other shapes such as an M shape and an E shape, instead of the U shape, and the lithium iron bus bar 5 may have other shapes such as a U shape and an E shape, instead of the shape shown in fig. 13, the lithium iron bus bar 5.

In addition, a first limiting structure for limiting at least part of the ternary bus bar 4 is formed on the substrate 3; and/or a second limiting structure for limiting at least part of the lithium iron bus bar 5 is formed on the substrate 3. So set up, can be convenient for the accurate positioning of ternary busbar 4 and/or lithium iron busbar 5 to can do benefit to the welding between ternary busbar 4 and/or lithium iron busbar 5 and the utmost point post.

Based on the specific shape and arrangement of the ternary bus bar 4 and the lithium iron bus bar 5, as a specific implementation, only the first limiting structure is provided in the present embodiment. The first position-limiting structure includes a position-limiting groove 301 formed on the substrate 3. In addition, the side wall of the limiting groove 301 of the present embodiment can abut against the ternary bus bar 4 to limit the displacement of the ternary bus bar 4.

So set up, can place in battery module top at base plate 3 to when putting ternary busbar 4 in spacing groove 301, can make two alignment holes on ternary busbar 4 align with the anodal post and the negative pole post of two adjacent ternary lithium ion cell 9 respectively, thereby can do benefit to ternary busbar 4 and accurate the linking to each other with utmost point post. In addition, since the base plate 3 has a plate-like structure, in order to facilitate the arrangement of the stopper groove 301, a rib is provided on the upper surface of the base plate 3, and the rib and the upper surface of the base plate 3 surround to form the stopper groove 301.

Here, when the lithium iron bus bar 5 is stacked above the ternary bus bar 4, only the second limit structure may be provided on the substrate 3, and the second limit structure may be a rectangular groove or a U-shaped groove that is adapted to the lithium iron bus bar 5. Of course, the first and second limiting structures may be disposed on the substrate 3 at the same time as the case may be.

The battery module of this embodiment through adopting above-mentioned structure, not only can have great energy, also can have higher security simultaneously, and moreover, this battery module can provide two sets of power of energy difference for the battery package to can make this battery module have better practicality.

Example two

The embodiment also relates to a battery pack, wherein the battery module is arranged in the battery pack.

The battery pack described in this embodiment can have a longer endurance mileage and higher safety by providing the battery module described in the first embodiment, and can have two sets of power supplies with different energies, so that the battery pack has a better use effect.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A battery module, its characterized in that: the lithium ion battery comprises a ternary battery cell unit and a lithium iron battery cell unit which are alternately arranged, wherein the ternary battery cell unit is provided with a ternary lithium ion battery cell (9), and the lithium iron battery cell unit comprises at least one lithium iron phosphate battery cell (10);

two adjacent ternary lithium ion battery cells (9) are connected in series, and two adjacent lithium iron phosphate battery cells (10) are connected in series;

a first ternary output electrode (15) and a first lithium iron output electrode (16) are arranged at the first end of the battery module, and a second ternary output electrode (14) and a second lithium iron output electrode (11) are arranged at the second end of the battery module;

the first ternary output electrode (15) is connected with the ternary lithium ion battery cell (9) at the first end, and the second ternary output electrode (14) is connected with the ternary lithium ion battery cell (9) at the second end;

first lithium iron output pole (16) and first end lithium iron phosphate cell (10) link to each other, second lithium iron output pole (11) and second end lithium iron phosphate cell (10) link to each other.

2. The battery module according to claim 1, wherein:

the adjacent two ternary lithium ion cells (9) are connected through a ternary bus bar (4), and the first ternary output electrode (15) and the second ternary output electrode (14) are respectively connected with the ternary lithium ion cell (9) at the corresponding end through a ternary transfer bar (8);

adjacent two connect through lithium iron busbar (5) between lithium iron phosphate cell (10), first lithium iron output pole (16) with second lithium iron output pole (11) are connected with lithium iron phosphate cell (10) that correspond the end through lithium iron switching row (6) respectively.

3. The battery module according to claim 1, wherein:

the battery module also comprises an output electrode protection seat (7) arranged on the end plate (1) of the battery module;

the output electrode protection seat (7) is arranged corresponding to each output electrode, a containing groove is formed in the output electrode protection seat (7), and each output electrode is connected with an external conductive piece in the containing groove.

4. The battery module according to claim 3, wherein:

the bottom of the output pole protective seat (7) is provided with an insertion column (7012), and the insertion column (7012) is suitable for being inserted into an insertion groove in the top of the end plate (1).

5. The battery module according to claim 4, wherein:

a clamping block (70121) is arranged on the insertion column (7012), and the clamping block (70121) inserted in the insertion groove is abutted against or clamped with the wall surface of the insertion groove.

6. The battery module according to claim 3, wherein:

the output electrode protection seat (7) comprises a cover body (702) and a protection seat body (701);

the cover body (702) is detachably connected with the protection seat body (701).

7. The battery module according to claim 6, wherein:

the protection seat body (701) comprises a supporting table (7011) and a plurality of bosses arranged along the circumferential direction of the supporting table (7011) at intervals, and an opening for allowing an external conductive piece to enter the accommodating groove is formed between every two adjacent bosses.

8. The battery module according to claim 2, wherein:

the ternary busbar (4) has two connecting sections arranged oppositely;

the two connecting sections are respectively connected with the positive pole column and the negative pole column of the two adjacent ternary lithium ion electric cores (9).

9. The battery module according to claim 2, wherein:

the lithium iron busbar (5) is provided with a groove for avoiding the ternary busbar (4);

and two ends of the lithium iron busbar (5) are respectively connected with the positive pole column and the negative pole column of the two adjacent lithium iron phosphate cores (10).

10. A battery pack, comprising: the battery pack is provided with the battery module according to any one of claims 1 to 9.

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