CN106531912B - A square battery module - Google Patents

Abstract

The invention discloses a square battery module, comprising a plurality of square battery cells, a plurality of battery conductive connecting sheets and a module frame, characterized in that the module frame comprises two module end plates and four modules Group fixing angle steel; the module end plate is a square plate, the four corners of the square plate are provided with end plate riveting through holes, the ends of the two ends of the module fixing angle steel are provided with angle steel riveting through holes, and the module fixing angle steel It is connected with the module end plate by means of riveting, so as to accommodate and fix a plurality of the square battery cells. The square battery module provided by the invention has the advantages of simple structure, convenient transportation and installation, high space utilization rate, strong versatility, suitable for large-scale production, and can improve production efficiency and reduce cost. This kind of module has high impact resistance, good thermal conductivity, and safe electrical circuit, which can effectively improve the working performance and service life of the battery module and the entire battery system.

Description

A square battery module

technical field

The invention relates to the technical field of battery packs, in particular to a square battery module.

Background technique

With the rapid development of the automobile industry, the problems of environmental pollution, energy shortage and resource depletion caused by automobiles have become more and more prominent. In order to maintain the sustainable development of the national economy, protect the living environment of human beings and ensure the supply of energy, the governments of various countries have spared no expense and invested a lot of manpower and material resources to study various ways to solve these problems. Electric vehicles have good environmental performance, which can not only protect the environment, but also adjust the energy structure, alleviate energy shortages and ensure energy security. The development of electric vehicles has become the consensus of governments and the auto industry. The power battery system is the key core component of electric vehicles, and its performance and cost directly affect the smooth progress of the large-scale promotion and application of electric vehicles.

In addition, my country's current power grid operation is facing many challenges such as the continuous increase of the highest electricity load, the expansion of intermittent energy access, and the limited means of peak regulation. As an important part of the smart grid, the energy storage battery system can effectively meet the demand Side management, eliminating the difference between day and night peaks and valleys, smoothing the electricity load. It can not only increase the operating efficiency of power equipment and reduce the cost of power supply, but also promote the application of renewable energy, improve the stability of system operation, adjust the frequency, and compensate for load fluctuations.

However, the energy provided by a single battery is limited. In order to meet the power demand of the electric vehicle power battery system or the national grid energy storage battery system, it is necessary to connect a large number of single batteries in series and (or) in parallel. These battery modules are then connected in series and/or in parallel to achieve a certain voltage level and capacity level to meet people's needs. To meet sufficient power needs in a limited space, the quality and efficiency of the battery system grouping technology will greatly affect the life and safety of the battery system.

At present, the group manufacturing of battery modules in the industry has various problems such as low modularity, low space utilization, cluttered electrical circuits, and unbalanced battery thermal conductivity, which greatly reduces the production efficiency and product quality of battery modules and battery systems. quality, shortening the service life of the battery system, and at the same time there is a greater safety hazard.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a square battery module with simple structure, convenient handling and installation, high space utilization, strong versatility, suitable for large-scale and mechanized production, and can improve production efficiency and reduce production costs. This kind of module has high impact resistance, good thermal conductivity and safe electrical circuit, which can effectively improve the working performance and service life of battery modules and battery systems.

The technical solution is as follows:

A square battery module includes a plurality of square battery cells, a plurality of battery conductive connecting sheets and a module frame, characterized in that the module frame comprises two module end plates and four module fixing angle steels. The module end plate is a square plate, the four corners of the square plate are provided with end plate riveting through holes, the ends of the two ends of the module fixing angle steel are provided with angle steel riveting through holes, the module fixing angle steel and the module The end plates are connected by riveting to accommodate and fix a plurality of the prismatic battery cells, as shown in FIG. 1 , FIG. 2 , FIG. 9 , FIG. 10 , FIG. 11 , FIG. 17 and FIG. 18 .

A plurality of the square battery cells are arranged and combined together according to the design requirements, and are placed in the module frame, and the battery conductive connecting sheet connects the positive and negative electrodes of the square battery cells according to the design requirements. or) for electrical connection in parallel. The battery conductive connection piece includes a module output conductive connection piece and a module grouped conductive connection piece. The module output conductive connection piece electrically connects the square battery cells at both ends of the square battery module, and serves as the square battery module. Positive and negative output terminals of the battery module. The modules form a set of conductive connecting sheets to electrically connect the prismatic battery cells except two ends of the prismatic battery module, as shown in FIG. 1 , FIG. 11 and FIG. 18 .

Further, the four corners of the square flat plate of the module end plate are provided with end plate connecting parts protruding to one side of the square flat plate, and the end face of the end plate connecting part is "L" shape (as shown in Figure 2 and Figure 4 ). shown) or a "mouth" shape (as shown in Figures 5 and 6).

Further, the module end plate is in the shape of an "H" with the edges of the upper and lower ends concave to the middle, and the front and rear edges of the module end plate are respectively curled inward to form a square hollow column with an inner opening and the other three sides closed. The upper and lower end surfaces of the square hollow column are closed, and the upper and lower end surfaces of the square hollow column and the upper and lower ends of the outer side surface perpendicular to the square plate are provided with end plate riveting through holes, as shown in Figure 7, Figure 8, Figure 12 and Figure 14. Show.

Further, the outer side of the module end plate is provided with a bag-shaped cavity that protrudes outwards corresponding to the position of the battery pole of the square battery cell, and the outer side wall of the bagged cavity is recessed from the upper end to the middle to form a "U". ”-shaped gap, the square battery module further includes a sheet-shaped pole fixing pin that is recessed from the lower end to the middle and is matched with the pocket-shaped cavity, and the pole-post fixing pin is inserted into the pocket from top to bottom. In the cavity, the module output conductive connecting piece is fixed on the side wall of the module end plate, as shown in Figure 9, Figure 10, Figure 12, Figure 13, Figure 14, Figure 17 and Figure 18.

Further, the square battery module also includes a module upper cover, the module upper cover is formed by splicing a plurality of top covers, the end surface of the top cover is a "冖"-shaped structure, and the two A top cover fixing screw hole is arranged at the edge of the side support foot; a top cover fixing ring is welded on the two module fixing angle steels on the upper side of the module frame, and the top cover fixing screw hole is connected to the top cover The fixing ring is connected by bolts to fix the top cover on the fixing angle steel of the module, as shown in FIG. 9 , FIG. 15 , FIG. 17 and FIG. 18 . The upper cover of the module can effectively shield the positive and negative electrodes of the square battery cell or the battery conductive connecting piece, so as to avoid insulation failure caused by exposure to the outside, and prevent the danger of electric shock to the production personnel.

Further, the top cover is provided with a collection line bayonet at the edges of the two end faces that are different from the support feet on both sides, as shown in FIG. 9 , FIG. 15 , FIG. 17 and FIG. 18 . The cable opening of the collection line card can constrain the arrangement of the data information collection wiring harness for fixing the square battery module, so as to avoid the wiring harness being cluttered and being squeezed and worn, thereby causing detection failure or short-circuit accident.

Further, the module end plate is provided with a module mounting bracket protruding outward at the lower end of the outer side, and the module mounting bracket is provided with a module mounting hole, and bolts can be used when the square battery module needs to be fixed. Fix it through the module mounting holes, as shown in FIGS. 8 , 9 , 12 , 14 and 17 .

Further, the outer upper end of the module end plate is provided with a module handling handle protruding outward, as shown in FIGS. 8 , 9 , 12 , 14 and 17 .

Further, a thermally conductive insulating plate is provided on the bottom and sides of the prismatic battery module and the side of the module end plate close to the prismatic battery cell. The heat generated during operation of the prismatic battery module can be rapidly conducted to the outside, and the internal temperature of each of the prismatic battery cells can be balanced at the same time, thereby improving the working performance and service life of the prismatic battery module.

Further, a plurality of prismatic battery spacers are also included, the prismatic battery spacers are located between two adjacent prismatic battery cells, and the prismatic battery spacers are elastic sheets made of thermally conductive insulating materials.

The squares in the present invention include squares and rectangles.

The prismatic battery module provided by the present invention can conveniently arrange different numbers of prismatic battery cells into any series-parallel combination battery module according to design requirements, and has the advantages of simple structure, high space utilization rate, strong versatility, and convenient installation and handling. , suitable for large-scale and mechanized production, can improve the production efficiency of battery modules and reduce production costs. This module has good thermal conductivity and safe electrical circuit, which can effectively improve the working performance and service life of the battery module and the entire battery system.

Description of drawings

1 is a schematic structural diagram of the square battery module of Example 1;

Fig. 2 is the structural representation of the module frame of embodiment 1;

Fig. 3 is the structural representation of the module fixing angle steel of embodiment 1;

Fig. 4 is the structural representation of the module end plate of embodiment 1;

Fig. 5 is the structural representation of the module end plate whose end face of the end plate connecting part is "mouth" shape;

Fig. 6 is the structural representation of another kind of module end plate whose end face of the end plate connecting part is "mouth" shape;

Fig. 7 is the structural representation of the "H"-shaped module end plate;

8 is a schematic structural diagram of an "H"-shaped module end plate provided with a module holder and a module handling handle;

9 is a schematic structural diagram of the square battery module of Example 2;

Fig. 10 is the structural representation of the module frame of embodiment 2;

11 is a schematic structural diagram of the square battery module after removing the upper cover of the module according to Example 2;

Fig. 12 is the structural representation of the module end plate of embodiment 2;

13 is a schematic structural diagram of the pole fixing pin of Embodiment 2;

14 is a schematic diagram of the assembly structure of the module end plate, the module output conductive connecting piece and the pole fixing pin of Embodiment 2;

15 is a schematic structural diagram of the top cover of Embodiment 2;

Fig. 16 is the structural representation of the module fixing angle steel welded with the top cover fixing ring of Embodiment 2;

17 is a schematic structural diagram of the prismatic battery module of Example 3;

FIG. 18 is an exploded view of the prismatic battery module of Example 3. FIG.

Among them, the reference numerals are described as follows:

10 Rectangular battery module 11 Rectangular battery cell 12 Battery conductive connection sheet

121 Module group conductive connection piece 122 Module output conductive connection piece 20 Module frame

21 Module end plate 211 End plate connecting part 212 End plate riveting through hole

213 Square hollow column 214 Module mounting bracket 215 Module mounting hole

216 Module handling handle 217 Bag cavity 22 Module fixing angle

221 Angle steel riveting through hole 222 Top cover fixing ring 23 Rivet

24 Module upper cover 241 Top cover 2411 Top cover fixing screw holes

2412 Collection line bayonet 25 Pole fixing pin 26 Square battery spacer

Detailed ways

Example 1

As shown in FIG. 1 to FIG. 4 , an embodiment of a square battery module is given.

As shown in FIGS. 1 to 4 , the prismatic battery module 10 in this example includes a plurality of prismatic battery cells 11 and a plurality of battery conductive connecting sheets 12 (including the module output conducting connecting sheets 122 and the modular grouping conducting connecting sheets 121 ) And the module frame 20 , the module frame 20 includes two module end plates 21 and four module fixing angle steels 22 . The module end plate 21 is a square flat plate. The four corners of the square flat plate are provided with end plate connecting parts 211 protruding to one side of the square plate. The ends of the two ends of the 22 are provided with angle steel riveting through holes 221. The module fixing angle steel 22 and the module end plate 21 are connected by rivets 23 by riveting, and the plurality of square battery cells 11 are accommodated and fixed.

In the module end plate 21 of the prismatic battery module 10 in this example, the end face of the end plate connecting portion 211 is "L" shaped.

A plurality of prismatic battery cells 11 are arranged and combined together according to design requirements. The module output conductive connecting piece 122 electrically connects the prismatic battery cells 11 at both ends of the prismatic battery module 10 and serves as the positive and negative output ends of the prismatic battery module 10 . . The conductive connecting pieces 121 of the module group electrically connect the prismatic battery cells 11 except for the two ends of the prismatic battery module 10 .

The prismatic battery module in this example can conveniently arrange different numbers of prismatic battery cells into any series-parallel combination battery module according to the design requirements. The structure is simple, the space utilization rate is high, the versatility is strong, and the impact resistance performance is high.

Example 2

As shown in Figures 9 to 16, another example of a square battery module is given. The difference between this example and Example 1 is:

The module end plate 21 of the square battery module 10 in this example is an “H” shape with the upper and lower ends of the edge concave to the middle. The front and rear edges of the module end plate 21 are respectively curled inward to form a square hollow column with an inner opening and the other three sides closed. 213, the upper and lower end surfaces of the square hollow column 213 are closed, and the upper and lower end surfaces of the square hollow column 213 and the upper and lower ends of the outer side surfaces perpendicular to the square plate are provided with end plate riveting through holes 212, as shown in Figure 9, Figure 10, Figure 11, 12 and 14.

In this example, the outer side of the module end plate 21 of the rectangular battery module 10 is provided with a bag-shaped cavity 217 protruding outwards corresponding to the position of the battery pole of the rectangular battery cell 11, and the outer side wall of the bagged cavity 217 is recessed from the upper end to the middle. A "U"-shaped notch is formed, and the square battery module 10 also includes a sheet-shaped pole fixing pin 25 that is recessed from the lower end to the middle and is matched with the pocket-shaped cavity 217. The pole-fixing pin 25 is inserted into the pocket-shaped cavity from top to bottom In the cavity 217, the module output conductive connecting piece 122 is fixed on the side wall of the module end plate 21, as shown in FIG. 9 , FIG. 11 , FIG. 12 , FIG. 13 and FIG. 14 .

In the module upper cover 24 of the square battery module 10 in this example, the top cover 241 is provided with a collection line bayonet 2412 at the edge of the two end faces different from the two support feet, as shown in FIG. 9 , FIG. 15 , FIG. 17 and shown in Figure 18. The cable port of the collection line card can constrain the arrangement of the data information collection wire harness of the fixed square battery module 10, so as to prevent the wire harness from being cluttered and being squeezed and worn, thereby causing detection failure or short-circuit accident.

In this example, the module end plate 21 is provided with a module mounting bracket 214 protruding outward at the lower end of the outer side, and the module mounting bracket 214 is provided with a module mounting hole 215. When the square battery module 10 needs to be fixed, bolts can be used. Fix it through the module mounting hole 215, as shown in Figures 9, 11, 12 and 14.

In this example, the outer upper end of the module end plate 21 is provided with a module handling handle 216 protruding outward, which facilitates the handling and assembly of the square battery module 10 when necessary, as shown in FIGS. 9 , 11 , 12 and 12 . 14 shown.

The square battery module 10 in this example further includes a module upper cover 24 , and the module upper cover 24 is formed by assembling a plurality of top covers 241 . The end surface of the top cover 241 is of a "冖"-shaped structure, and the top cover fixing screw holes 2411 are provided at the edges of the two supporting feet of the top cover 241 . The top cover fixing ring 222 is welded on the two module fixing angle steels 22 on the upper side of the module frame 20 , and the top cover fixing screw holes 2411 and the top cover fixing ring 222 are connected by bolts so that the top cover 241 is fixed on the module fixing angle steel 22 , as shown in Figure 9, Figure 10, Figure 15 and Figure 16. The upper cover 24 of the module can effectively shield the positive and negative electrodes of the square battery cells 11 or the battery conductive connecting pieces 12, so as to avoid insulation failure caused by exposure to the outside, and prevent the production personnel from the danger of electric shock.

The prismatic battery module provided in this example can conveniently arrange different numbers of prismatic battery cells into any series-parallel combination battery module according to the design requirements. It has high impact resistance, simple structure, high space utilization, and electrical circuit safety. , strong versatility, easy installation and handling, suitable for large-scale and mechanized production, can improve the production efficiency of battery modules and reduce production costs.

Example 3

As shown in Figs. 17 and 18, another embodiment of a prismatic battery module is given.

The prismatic battery module 10 in this example further includes a plurality of prismatic battery spacers 26, the prismatic battery spacers 26 are located between two adjacent prismatic battery cells 11, and the prismatic battery spacers 26 are elastic sheets made of thermally conductive insulating materials .

In addition, some other embodiments are also included, in which a thermally conductive insulating plate and the like are provided on the bottom and/or sides of the prismatic battery module 10 and the side of the module end plate 21 close to the prismatic battery cells 11 . The heat generated during operation of the prismatic battery module can be rapidly conducted to the outside, and the internal temperature of each prismatic battery cell can be balanced at the same time, thereby improving the working performance and service life of the prismatic battery module.

The square battery module provided by the invention has the advantages of simple structure, convenient handling and installation, high space utilization rate, strong versatility, suitable for large-scale and mechanized production, and can improve production efficiency and reduce production cost. This kind of module has high impact resistance, good thermal conductivity and safe electrical circuit, which can effectively improve the working performance and service life of battery modules and battery systems.

Claims (7)

1. A square battery module comprises a plurality of square battery monomers, a plurality of battery conductive connecting sheets and a module frame, and is characterized in that the module frame comprises two module end plates and four module fixing angle steels; the module end plate is a square flat plate, end plate riveting through holes are formed in four corners of the square flat plate, angle steel riveting through holes are formed in the end portions of two ends of the module fixing angle steel, the module fixing angle steel is connected with the module end plate in a riveting mode, and a plurality of square battery monomers are accommodated and fixed;

The square battery module also comprises an upper module cover, the upper module cover is formed by splicing a plurality of top covers, the end surface of each top cover is of an -shaped structure, and top cover fixing screw holes are formed in the edges of supporting legs at two sides of each top cover; a top cover fixing ring is welded on the two module fixing angle steels on the upper side of the module frame, and the top cover fixing screw holes are connected with the top cover fixing ring through bolts so that the top cover is fixed on the module fixing angle steels;

the top cover is provided with an acquisition line bayonet at the edge of the end surface of two ends different from the supporting legs at two sides;

the module end plate is "H" shape that both ends border is sunken to the middle part about for, the border inwards curls respectively around the module end plate and forms interior side opening, other three confined square hollow column, the upper and lower terminal surface of square hollow column is sealed, the upper and lower terminal surface of square hollow column and with the upper and lower tip of square dull and stereotyped vertically outside side all be provided with end plate riveting through-hole.

2. The prismatic battery module according to claim 1, wherein the module end plates are provided at four corners of the prismatic flat plate with end plate connection parts protruding toward one side of the prismatic flat plate, and the end surfaces of the end plate connection parts are "L" shaped or "mouth" shaped.

3. The square battery module according to claim 1, wherein a bag-shaped cavity protruding outward is formed in the outer side of the module end plate corresponding to the position of the battery post of the single square battery, the outer side wall of the bag-shaped cavity is recessed from the upper end to the middle to form a U-shaped opening, the square battery module further comprises a sheet-shaped post fixing pin recessed from the lower end to the middle, the post fixing pin is inserted into the bag-shaped cavity from top to bottom to fix the module output conductive connecting piece on the side wall of the module end plate.

4. The prismatic battery module according to claim 1, wherein the module end plate is provided at an outer lower end with an outwardly protruding module mounting bracket provided with a module mounting hole.

5. The prismatic battery module according to claim 1, wherein the module end plate is provided at an outer upper end thereof with a module carrying handle protruding outward.

6. The prismatic battery module according to claim 1, wherein the bottom and the side of the prismatic battery module and the side of the module end plate adjacent to the prismatic battery cell are provided with a heat conductive insulating plate.

7. The square battery module according to any one of claims 1 to 6, further comprising a plurality of square battery spacers, wherein the square battery spacers are located between two adjacent square battery cells, and the square battery spacers are elastic sheets made of a heat-conducting insulating material.

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