TW201601371A - Lithium battery module - Google Patents

Abstract

The invention discloses a lithium battery module, including: the shell, the upper cover, electric core group arranged in the shell, which is composed of a plurality of the electric core component; can remove holder is connected to the shell; conducting strips connected in series with the electric core and / or parallel; and the structure of the same the two conductive posts; the lithium battery module is set to electrode position by adjusting the electric core, change the output current of the conductive column in the same position. Lithium battery module of the invention, in its external structure size under the same circumstances, the lithium battery module output electrode is fixed in the same position, through the transformation of the internal electric core position, and a conducting strip with different specifications of the connection of the electric core, can provide the electrical output of different specifications.

Description

Lithium battery module

The invention belongs to the technical field of batteries, and in particular relates to a lithium battery module.

Lithium batteries are widely used in various industries, such as pure electric vehicles, hybrid power units, plug-in hybrid vehicles, and ships, rail transit, solar power, and wind power systems. Especially with the development of electric vehicles, the requirements for the performance of lithium batteries are getting higher and higher.

The former lithium battery module structure usually includes a casing, and a plurality of batteries are arranged in the casing. After the positive and negative poles of each battery core are set according to the output specification requirements, the respective batteries are connected by a flexible connecting wire, and at the same time, the welding is performed. The method is characterized in that the flexible connecting line is connected to the output conductive column disposed on the housing, and then the entire lithium battery module is powered by the connecting conductive terminal on the conductive post. The flexible connecting wire is used to connect the respective batteries, and the battery core is connected to the conductive column, so that the housing and the conductive column can be absorbed by the torque when the external connection is made or the impact is affected during the operation, and the influence is directly transmitted to the internal The positive and negative poles of the battery cause the possibility of liquid leakage.

However, since the connection line itself cannot withstand a large current during the working process, the lithium battery module of the foregoing structure can only obtain a high power output by outputting a high voltage and a small current, which limits its application range. In practical applications, lithium battery modules are required to obtain high power by using low voltage and high current to meet the needs.

In the prior art, a plurality of sets of low-current lithium battery modules are connected in parallel to obtain a large current. However, in this way, a large current is obtained, the structure is complicated, and the cost is wasted. Or by changing the position of the conductive column to obtain the current output of different specifications, using this method to obtain a large current, the process is complicated, and the current output corresponding to different specifications is required, and it is also costly to develop a plurality of corresponding molds.

In order to overcome the disadvantages of the foregoing prior art, the object of the present invention is to provide a lithium battery module, which solves the problem that the existing lithium battery module can only perform high voltage and small current output, and realizes the lithium battery module externally. A variety of specifications are output with the same structure.

Correspondingly, the present invention provides a lithium battery module, the lithium battery module comprising: a casing; a cover for closing the casing; and a battery core group disposed in the casing, the battery module is composed of a plurality of batteries, Each of the cells includes two electrodes; a bracket detachably coupled to the housing, the bracket for fixing the battery core; a conductive sheet connected in series and/or in parallel with the battery core; and the same structure The two conductive pillars are electrically connected directly to the battery cell to form an output electrode of the lithium battery module; the lithium battery module is configured to adjust an electrode of the battery core Position, changing the output current of the conductive column at the same position.

As a further improvement of the present invention, the conductive pillar includes: a conductive pillar body, an electrical output connection hole formed on the conductive pillar body, and a conductive connection pillar extending from the conductive pillar body, and the conductive connection a conductive terminal extending from the pillar, and a fixed terminal disposed on the conductive pillar body for connecting with the bracket, wherein the conductive pillar is directly electrically connected to the battery core through the electrical output connecting hole, Forming an output electrode of the lithium battery module.

As a further improvement of the present invention, the cross section of the main body of the conductive post is a triangle having three rounded corners.

As a further improvement of the present invention, the electrical output connection hole is opened at two rounded positions adjacent to the triangle; the conductive connection column is disposed adjacent to another rounded position of the triangle, and an outer shape thereof is from the conductive A smooth cylinder extending vertically upward from the column body, the conductive terminal being a thread extending upward from the conductive connecting post.

As a further improvement of the present invention, the fixed terminal is a spiral hole disposed between the two electrical output connection holes, and a screw that cooperates with the screw hole, and the screw passes through the spiral hole to A conductive post is secured to the bracket.

As a further improvement of the present invention, the conductive post is made of copper or naval copper.

As a further improvement of the present invention, the bracket includes a plurality of lattice strips disposed vertically and horizontally, a plurality of cell receiving regions are formed between the barrier strips, and the battery core passes through the cell receiving region and is disposed on Inside the housing.

As a further improvement of the present invention, the battery pack includes at least two cell matrix units, and the conductive posts are always disposed at fixed positions of the cell matrix unit.

As a further improvement of the present invention, the conductive sheet comprises a first conductive sheet and a second conductive sheet, the first conductive sheet connecting the second and third row electrodes of the single core matrix unit, the second conductive sheet The adjacent cell matrix units are connected in series; the conductive posts are always in direct contact connection with the first of the cell matrix units and the fourth row of electrodes of the last of the cell matrix units.

Compared with the prior art, the lithium battery module of the present invention is a high-current compatible lithium battery module with high current output. When the external structure of the lithium battery module is the same, the output electrode of the lithium battery module is fixed at the same position. By changing the position of the internal cells and providing conductive sheets of different specifications to connect the cells, electrical outputs of different specifications can be provided; at the same time, the conductive posts and the cells are made by a new conductive sheet and a conductive pillar structure. The electrodes and the electrodes of the respective cells are directly connected without using a connecting wire, thereby realizing a low voltage and large current output of the lithium battery module.

The first figure is a schematic diagram of an explosion structure of a lithium battery module according to an embodiment of the present invention;

The second figure is a schematic enlarged view of the stent shown in the first figure;

The third figure is a schematic enlarged view of the conductive column shown in the first figure;

The fourth figure is a schematic structural view of the combination of the conductive post and the battery core shown in the third figure;

Figure 5 is a schematic view showing the arrangement of the cells in the cell group in the first embodiment of the present invention;

6 is a schematic structural view showing a connection between a battery cell and a conductive sheet and a conductive post in the battery pack according to the first embodiment of the present invention;

Figure 7 is a schematic enlarged view of the conductive sheet shown in the sixth figure;

Figure 8 is a schematic view showing the arrangement of the cells in the cell group in the second embodiment of the present invention;

FIG. 9 is a schematic structural view showing a connection between a battery cell and a conductive sheet and a conductive post in a battery pack according to a second embodiment of the present invention;

The tenth figure is a schematic enlarged view of the conductive sheet shown in the ninth figure.

The invention will be described in detail below in conjunction with the specific embodiments illustrated. However, the embodiments are not intended to limit the invention, and the structural, method, or functional changes made by those skilled in the art in accordance with the embodiments are included in the scope of the present invention.

Referring to the first figure, the first figure is a schematic diagram of an explosion structure of a lithium battery module according to an embodiment of the present invention. Correspondingly, the lithium battery module of the invention is a high-compatible lithium battery module with high current output.

The lithium battery module includes a housing 10, a battery pack 20, a bracket 30, a conductive post 40, a conductive sheet 50, and an upper cover 60.

Correspondingly, the battery pack 20 comprises a plurality of cells 25 .

Preferably, the lithium battery module is configured to adjust an output current of the entire lithium battery module when the conductive column 40 is in the same position by adjusting an electrode position of the battery core 25. In order to realize the output of various specifications under the condition that the external structure of the lithium battery module is consistent, in the assembly process of the lithium battery module, only one mold of a specification needs to be developed, that is, the lithium battery module can be realized. The output of various specifications, the process is simple to realize, and the manufacturing cost is saved.

Correspondingly, the housing 10 is used to carry the entire battery module. In a specific embodiment of the invention, it is a cubic box with a single opening.

Correspondingly, the battery pack 20 is disposed in the casing 10 and is composed of a plurality of cells 25 (in combination with the fifth figure and the eighth figure). The battery cell 25 includes two electrodes, which are a positive electrode 251 and a negative electrode 253.

Correspondingly, in conjunction with the second figure, the second figure is an enlarged schematic view of the bracket shown in the first figure; the bracket 30 is detachably connected to the housing 10 and close to the housing. A single-sided open end of 10 is provided for fixing the battery cell 20. The utility model comprises: a plurality of grid strips 31 arranged vertically and horizontally, a plurality of cell receiving regions 33 are formed between the barrier strips 31, and the number of the cell receiving regions 33 is equal to the number of the cells 25, The battery cell 25 passes through the cell receiving area 33 and is disposed in the housing 10. The barrier strip 31 between the cell receiving regions 33 causes a certain gap between the cells 25 after the cells 25 are placed in the housing 10, when the lithium battery module is in operation. , leaving a space for the expansion of a single of the cells 25 due to heat, so as not to cause a squeeze between the plurality of the cells 25; in addition, the gaps also constitute a channel for air flow, which facilitates multiple The battery core 25 itself dissipates heat, thereby reducing the internal temperature of the lithium battery module and prolonging the service life.

Correspondingly, in combination with the third figure, the fourth figure, the third figure is a schematic diagram of the enlarged structure of the conductive column shown in the first figure; the fourth figure is the structure of the combination of the conductive column and the battery core shown in the third figure. schematic diagram.

Correspondingly, the conductive post 40 is integrally formed and electrically connected to the battery core 25 to form an output electrode of the lithium battery module. The conductive pillar 40 includes: a conductive pillar main body 41, an electrical output connecting hole 42 formed on the conductive pillar main body 41, and a conductive connecting pillar 43 extending from the conductive pillar main body 41, from the conductive connecting pillar a conductive terminal 44 extending from the conductive pillar 44 and a fixed terminal disposed on the conductive pillar main body 41 for connecting with the bracket 30; wherein the conductive post 40 is connected to the electrical outlet via the electrical output connecting hole 42 The core 25 is electrically connected, and the conductive terminal 44 is matched with the through hole 61 of the upper cover 60 to connect the conductive post 40 to the outside, thereby outputting the electric quantity carried by the battery core 20; The number of the connection holes 42 is not specifically limited, and is specifically set according to the overall output power of the lithium battery module.

Preferably, the cross section of the conductive column main body 41 is a triangle having three rounded corners.

Preferably, in one embodiment of the present invention, the cross section of the conductive pillar main body 41 is an isosceles triangle having three rounded corners, and the electrical output connecting hole 42 is opened adjacent to the bottom corner of the isosceles triangle. Positioned at a position adjacent to an apex angle of an isosceles triangle, the outer shape of which is a smooth cylinder extending vertically upward from the conductive column main body 41; the conductive terminal 44 is from the conductive connecting post a thread extending upwardly; the fixed terminal includes a spiral hole 451 disposed near a bottom edge of the isosceles triangle and disposed between the two electrical output connection holes 42; The fixed terminal further includes a screw 453 adapted to the screw hole 451, and the screw 453 passes through the screw hole 451 to fix the conductive post 40 to the bracket 30.

Correspondingly, in the specific embodiment of the present invention, the number of the electrical output connection holes 42 is two. It should be noted that, in other embodiments not mentioned in the present invention, the number of the electrical output connection holes 42 may be specifically set according to actual needs.

Correspondingly, the material of the conductive pillar 40 is not particularly limited. In a preferred embodiment of the present invention, the conductive pillar 40 is made of copper or navy copper.

A conductive sheet 50 for connecting the cells 25 in series and/or in parallel.

The upper cover 60 is adapted to the opening of the housing 10 for closing the housing 10 to form a sealed cubic space with the housing 10 for receiving the battery pack 30. The conductive post 40 and the conductive sheet 50. At the same time, the housing 10 and the upper cover 60 form an external barrier that also constitutes the cell group 30, the conductive posts 40, and the conductive sheets 50. In order to make the lithium battery module have good insulation safety performance.

Preferably, the upper cover 60 further defines a through hole 61. The number of the through holes 61 is the same as the number of the conductive posts 40, and the size is matched with the fixed terminal on the conductive post 40. After the upper cover 60 is covered by the housing 10, the fixed terminal passes through the two through holes 61 to form two output ends of the lithium battery module.

Correspondingly, there is no special requirement for the material of the casing 10 and the upper cover 60, as long as the material for manufacturing the material has good insulation safety performance, for example: PC + ABS material, the PC is an abbreviation of English Polycarbonate. The translated Chinese name is: polycarbonate; the ABS is the abbreviation of English Acrylonitrile butadiene Styrene copolymers, and the translated Chinese name is: acrylonitrile-butadiene-styrene copolymer.

Correspondingly, in combination with the fifth figure and the eighth figure, the fifth figure is a schematic diagram of the arrangement of the cells in the cell group in the first embodiment of the present invention; and the eighth figure is in the cell group in the second embodiment of the present invention. Schematic diagram of the arrangement of the cells.

The cell group 20 comprises at least one cell matrix unit 21 comprising at least one cell pair 23, said cell pair 23 comprising at least two cells 25 connected in series.

Specifically, the cell group 20 includes N×M cells 25 connected in series with N in parallel, where N=1, 2, 3..., M=2n, n=1, 2, 3... The battery cell 25 is provided with two electrodes (251, 253), which are a positive electrode 251 and a negative electrode 253, respectively; the two cells 25 in which the four electrodes are arranged in a straight line are a pair of cells 23, and the four electrodes are pressed by the positive electrode 251. The negative electrodes 253 are arranged in order, and the N pairs of cells 23 having the same arrangement direction are arranged side by side to form one cell matrix unit 21, and the electrodes 25 of the cell matrix unit 21 are arranged in 4 rows and N columns, M/2 electric The core matrix unit 21 is arranged in the lateral direction, and the odd-numbered positions are opposite to the arrangement of the electrodes 25 of the cell matrix unit 21 at the even-numbered positions.

For the convenience of description, the first row, the second row, the third row, and the fourth row are defined from top to bottom in the figure; the order from left to right is 1, 2, 3, ... M/2. .

7 is a seventh embodiment, and the seventh embodiment is a schematic enlarged view of the conductive sheet shown in the sixth figure; the tenth is a schematic enlarged view of the conductive sheet shown in the ninth figure.

The conductive sheet 50 includes a first conductive sheet 51 and a second conductive sheet 53, and the first conductive sheet 51 is connected to the second and third row electrodes (251, 253) of the single core matrix unit 21, The two conductive sheets 53 connect the adjacent cell matrix units 21 in series; the first of the cell matrix units 21 and the fourth row electrodes (251, 253) of the M/2th cell matrix unit 21 are electrically conductive The column 40 is in direct contact with the connection.

Preferably, in a specific embodiment of the present invention, the first conductive sheet 51 and the second conductive sheet 53 have a rectangular cross-sectional shape, and the first conductive sheet 51 is symmetrically disposed with two rows of electrode connecting holes. 511, the two rows of electrode connection holes 511 are respectively adjacent to two opposite parallel sides of the first conductive sheet 51; and the second conductive sheet 53 is provided with one row of electrode connection holes 511 arranged along the longitudinal direction thereof.

A through window 513 is further defined between the two rows of electrode connection holes 511 of the first conductive sheet 51. Of course, in other embodiments, the transparent window 513 may be omitted, and only the electrode connection holes may be formed on the first conductive sheet 51.

Preferably, the number of the transparent windows 513 is equal to the sum of the number of the battery cells 23 minus 1. When the first conductive sheet 51 is connected to the battery core group 20, the transparent window 513 is at Between two adjacent pairs of cell pairs 23.

Correspondingly, in the specific embodiment of the present invention, the battery cells are connected in series and/or in parallel by the conductive sheet 50 according to the arrangement manner of the battery cells 25, provided that the number of the battery cells 25 is constant. 25, the different power output specifications of the battery core group 20 can be obtained, and the output electrodes of the battery cells 20 of the different arrangement modes are always in the same position, and the multi-standard high-current output is provided for the same shape structure lithium battery module. The foundation. Two specific embodiments will be listed below for further details.

Correspondingly, in combination with the sixth figure, the sixth figure is a structural schematic diagram of the connection of the electric core and the conductive sheet and the conductive column in the battery group in the first embodiment of the present invention. In the first embodiment of the present invention, the cell group 20 includes 16 cells 25 connected in series in 2 in parallel; each cell 25 is provided with a positive electrode 251 and a negative electrode 253. Specifically, the cell group 20 includes four cell matrix units 21, four cell matrix units 21 are arranged laterally, and the electrodes (251, 253) in the first and third cell matrix units 21 are arranged in the same direction. Two, the electrodes (251, 253) in the fourth cell matrix unit 21 are arranged in opposite directions. Each of the cell matrix units 21 includes a positive electrode, a negative electrode arranged in the same direction, and two cell pairs 23 arranged side by side; each of the cell pairs 23 includes four electrodes (251, 253) arranged in a line The two electrodes 25; and the four electrodes (251, 253) are arranged in order of the positive electrode and the negative electrode, that is, the order of the positive electrode, the negative electrode, the positive electrode, and the negative electrode.

Correspondingly, one cell matrix unit 21 comprises four cells 25, and the electrodes (251, 253) of the cell matrix unit 21 constitute a 4 x 2 matrix.

The first conductive sheet 51 includes four electrode connection holes 511 respectively disposed at four corners thereof, and a through window 513 disposed at a central position between the four electrode connection holes. The second conductive sheet 53 includes four electrode connection holes 511 which are sequentially arranged in the longitudinal direction thereof.

Correspondingly, the second row and the third row of electrodes (251, 253) of each of the cell matrix units 21 are connected by the first conductive sheet 51, and the first conductive sheet 51 realizes the parallel connection of the cells 25 in the cell matrix unit 21. Connect in series. The first row electrode (251, 253) of the first and second cell matrix units 21, the first row electrode (251, 253) of the third and fourth cell matrix unit 21, and the second and third electric The fourth row electrodes (251, 253) of the core matrix unit 21 are connected by the second conductive sheet 53, and the second conductive sheet 53 realizes a series connection between the four core matrix units 21. In this way, two of the 16 cells 25 are connected in parallel and eight in series. The fourth row electrode (251, 253) of the first and fourth cell matrix units 21 is connected to the conductive post 40 to form an output electrode of the lithium battery module.

Correspondingly, in conjunction with the ninth figure, the ninth figure is a structural schematic diagram of the connection of the electric core and the conductive sheet and the conductive column in the battery group in the second embodiment of the present invention. In another embodiment of the present invention, the battery core group 20 includes 16 battery cells 25 connected in series in 4 in parallel; each of the battery cells 25 is provided with a positive electrode 251 and a negative electrode 253. Specifically, the cell group 20 includes two cell matrix units 21, two cell matrix units 21 are arranged laterally, and the electrodes (251, 253) are arranged in opposite directions. Each of the cell matrix units 21 includes a positive electrode and a negative electrode arranged in the same direction and arranged in parallel with eight cell pairs 23; each of the cell pairs 23 includes four electrodes (251, 253) arranged in a line The two electrodes 25; and the four electrodes (251, 253) are arranged in order of the positive electrode and the negative electrode, that is, the order of the positive electrode, the negative electrode, the positive electrode, and the negative electrode.

Correspondingly, one cell matrix unit 21 comprises eight cells 25, and the electrodes (251, 253) of the cell matrix unit 21 constitute a 4 x 4 matrix.

The first conductive sheet comprises a total of eight electrode connection holes in two rows, and three transparent windows disposed between the two rows of electrode connection holes. When the first conductive sheet 51 is connected to the battery core group 20, three of the transparent windows 513 are respectively located between two adjacent pairs of battery cells 23; the second conductive sheet 53 has two specifications. One specification includes four electrode connection holes 511 which are sequentially arranged in the longitudinal direction thereof, and the other includes eight electrode connection holes 511 which are sequentially arranged in the longitudinal direction thereof.

Correspondingly, the second row and the third row of electrodes (251, 253) of each of the cell matrix units 21 are connected by the first conductive sheet 51, and the first conductive sheet 51 realizes the parallel connection of the cells 25 of the cell matrix unit 21 Connect in series. The first row electrode (251, 253) of the first and second cell matrix units 21, the fourth row electrode (251, 253) of the third and first cell matrix unit 21, and the second cell matrix unit 21 The fourth row of electrodes (251, 253) is connected by the second conductive sheet 53, and the second conductive sheet 53 realizes a series connection between the two core matrix units 21. In this way, four of the 16 cells 25 are connected in parallel and in series. The third and the second of the fourth row electrodes (251, 253) of the first cell matrix unit 21, and the third and the fourth row electrode (251, 253) of the second cell matrix unit 21 Four connected to the conductive pillar 40 constitute an output electrode of the lithium battery module.

The foregoing two specific embodiments only take a 16-cell lithium battery module as an example, and provide a connection mode of two or eight strings or four parallel strings, and more specifications can be obtained by the cell arrangement and the conductive column of the present invention. The high current output is compatible with lithium battery modules, for example, a lithium battery module of 24 batteries, and the lithium battery module of the 24 batteries is two or twelve strings, four and six strings or six and four strings. The connection method is connected, etc., and the description will not be repeated here.

Compared with the prior art, the lithium battery module of the present invention is a high-current compatible lithium battery module with high current output. When the external structure of the lithium battery module is the same, the output electrode of the lithium battery module is fixed at the same position. By changing the position of the internal cells and providing conductive sheets of different specifications to connect the cells, electrical outputs of different specifications can be provided; at the same time, the conductive posts and the cells are made by a new conductive sheet and a conductive pillar structure. The electrodes and the electrodes of the respective cells are directly connected without using a connecting wire, thereby realizing a low voltage and large current output of the lithium battery module.

The low voltage is 16V or 24V, and the large current is 500A. Of course, the voltage and current output of other specifications can be realized by the connection manner of the foregoing structure, and details are not described herein.

It is to be understood that the description is not to be construed as limited to The technical solutions in the various embodiments may also be combined as appropriate to form other embodiments that can be understood by those skilled in the art.

The detailed description of the series of the foregoing is merely illustrative of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Changes are intended to be included within the scope of the invention.

10‧‧‧shell

20‧‧‧ batteries group

21‧‧‧ cell matrix unit

23‧‧‧ batteries unit

25‧‧‧ batteries

251‧‧‧ positive electrode

253‧‧‧negative electrode

30‧‧‧ bracket

31‧‧ ‧ block

33‧‧‧ Battery receiving area

40‧‧‧conductive column

41‧‧‧ Conductive column body

42‧‧‧Electrical output connection hole

43‧‧‧ Conductive connecting column

44‧‧‧Electrical terminals

451‧‧‧Spiral hole

453‧‧‧ screws

50‧‧‧Conductor

51‧‧‧First conductive sheet

511‧‧‧electrode connection hole

513‧‧‧through window

53‧‧‧Second conductive sheet

60‧‧‧Upper cover

61‧‧‧through hole

no

10‧‧‧shell

20‧‧‧ batteries group

30‧‧‧ bracket

40‧‧‧conductive column

50‧‧‧Conductor

60‧‧‧Upper cover

61‧‧‧through hole

Claims (9)

A lithium battery module comprising:
case;
Closing the upper cover of the housing;
a battery pack disposed in the housing, which is composed of a plurality of batteries, each of the batteries including two electrodes;
Removably connected to a bracket in the housing, the bracket is used to fix the battery core;
a conductive sheet connected in series and/or in parallel with the battery cell;
And two conductive columns of the same structure, the conductive column is electrically connected directly to the battery core to form an output electrode of the lithium battery module;
Wherein, the lithium battery module is configured to change an output current of the conductive pillar at the same position by adjusting an electrode position of the battery core. The lithium battery module of claim 1, wherein the conductive pillar comprises: a conductive pillar body, an electrical output connection hole formed on the conductive pillar body, and extending from the conductive pillar body a conductive connecting post, a conductive terminal extending from the conductive connecting post, and a fixed terminal disposed on the conductive column main body for connecting with the bracket, the conductive column is directly connected by the electrical output connecting hole The battery is electrically connected to form an output electrode of the lithium battery module. The lithium battery module according to claim 2, wherein the conductive column main body has a triangular cross section with three rounded corners. The lithium battery module according to claim 3, wherein the electrical output connection hole is opened at two rounded positions adjacent to the triangle; the conductive connection column is adjacent to another rounded position of the triangle. The outer shape is a smooth cylinder extending vertically upward from the main body of the conductive post, and the conductive terminal is a thread extending upward from the conductive connecting post. The lithium battery module of claim 4, wherein the fixed terminal is a screw hole disposed between the two electrical output connection holes, and a screw that cooperates with the screw hole, A screw passes through the spiral hole to fix the conductive post to the bracket. The lithium battery module of claim 1, wherein the conductive post is made of copper or navy copper. The lithium battery module of claim 1, wherein the bracket comprises a plurality of lattice strips disposed vertically and horizontally, and a plurality of core receiving regions are formed between the barrier strips, and the core is worn The cell receiving area is disposed and disposed in the housing. The lithium battery module of claim 1, wherein the battery core group comprises at least two battery core units, and the conductive columns are always disposed at fixed positions of the battery core unit. The lithium battery module of claim 8, wherein the conductive sheet comprises a first conductive sheet and a second conductive sheet, and the first conductive sheet is connected to a second one of the single core matrix units a three-row electrode, wherein the second conductive sheet connects adjacent cell matrix units in series; the conductive post is always directly connected to the first row of the matrix unit and the fourth row of the last matrix unit Contact connection.