CN113224436A

CN113224436A - Battery module

Info

Publication number: CN113224436A
Application number: CN202110475481.1A
Authority: CN
Inventors: 林倡全
Original assignee: Zhuhai Cosmx Power Battery Co Ltd
Current assignee: Zhuhai Cosmx Power Battery Co Ltd
Priority date: 2021-04-29
Filing date: 2021-04-29
Publication date: 2021-08-06

Abstract

The invention provides a battery module, which comprises at least one battery cell and a frame body, wherein the at least one battery cell is positioned in the frame body, the at least one battery cell is stacked into at least one column from top to bottom, the at least one column of battery cells are arranged side by side, the frame body comprises a top plate, a bottom plate and at least one binding belt, the top plate is positioned on the top surface of the frame body, the bottom plate is positioned on the bottom surface of the frame body, and at least part of the binding belt is surrounded on the outer sides of the top plate and the bottom plate. Establish the bandage in electric core periphery, fix electric core in the framework with the bandage, can reduce the quantity that sets up of curb plate, the overall structure of framework is comparatively simple, and weight is less. Therefore, the battery module provided by the invention solves the technical problems of complex structure and heavy weight of the existing frame body.

Description

Battery module

Technical Field

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

Background

The lithium ion battery is widely applied to the field of energy storage and power batteries due to the advantages of light weight, large energy storage, large power, long service life, small self-discharge coefficient, wide temperature application range and the like. For the soft package battery, the requirements of high voltage and high electric energy of the battery of the energy storage system are met, and the soft package battery is good in safety performance, light in weight, large in capacity, small in internal resistance and the like.

At present, the battery module includes framework and at least one electric core, and at least one electric core range upon range of setting is in the framework.

However, the conventional frame body has a complicated structure and a large weight.

Disclosure of Invention

In view of this, embodiments of the present invention provide a battery module to solve the technical problems of a complex structure and a heavy weight of the existing frame.

An embodiment of the present invention provides a battery module, including: at least one electric core and framework, at least one electric core are located the framework, and at least one electric core top-down stacks into at least one row, and each row of electric core sets up side by side, and the framework includes roof, bottom plate and at least one bandage, and the roof is located the top surface of framework, and the bottom plate is located the bottom surface of framework, and at least part bandage encloses the outside of establishing at roof and bottom plate.

So set up, establish the bandage in electric core periphery, fix electric core in the framework with the bandage, can reduce the quantity that sets up of curb plate, the overall structure of framework is comparatively simple, and weight is less.

In some embodiments, which may include the above embodiments, at least one first fixing opening is respectively disposed at two opposite sides of the top plate at intervals, and one of the first fixing openings on one side of the top plate is disposed opposite to one of the first fixing openings on the other side of the top plate;

at least one second fixing port is respectively arranged on two opposite side edges of the bottom plate at intervals, and one second fixing port on one side edge of the bottom plate is opposite to one second fixing port on the other side edge of the bottom plate;

one of them first fixed mouthful is relative with one of them second fixed mouthful setting in the vertical direction, and at least part bandage is worn to establish in first fixed mouthful and second fixed mouthful.

In some embodiments which may include the above embodiments, at least one assembly hole is respectively formed in the top plate and the bottom plate facing the region between two adjacent columns of battery cells, one assembly hole located on the top plate and one assembly hole located on the bottom plate are arranged oppositely, and the binding band is inserted into the two assembly holes arranged oppositely from top to bottom;

at least one bandage encloses the outside of establishing at a battery cell, a partial roof that battery cell is just right and bottom plate.

In some embodiments, which may include the above-described embodiments, at least one reinforcing rib is provided at intervals on each of the top plate and the bottom plate, a portion of the top plate protrudes toward the top surface of the battery module to form the reinforcing rib on the top plate, and a portion of the bottom plate protrudes toward the top surface away from the battery module to form the reinforcing rib on the bottom plate.

In some embodiments that may include the foregoing embodiments, at least one limiting member is disposed on each of the top plate and the bottom plate at an interval, the limiting member on the top plate is disposed at an edge of one side of the top plate facing the bottom plate, the limiting member on the bottom plate is disposed at an edge of one side of the bottom plate facing the top plate, and the limiting member is located outside the electric core.

In some embodiments, which may include the above embodiments, a first insulating plate is disposed between the top plate and the battery cell;

and/or a second insulating plate is arranged between the bottom plate and the battery core.

In some embodiments, which may include the above embodiments, a separator is disposed on one side of the frame, each cell includes a first tab and a second tab, the first tab and the second tab extend from the cell in a direction perpendicular to the side-by-side direction of the cell, and a cover of the separator is disposed on the first tab and the second tab.

In some embodiments, which may include the above embodiments, two support members are disposed between the frame and the partition plate, wherein one support member is located at the top end of the frame, and the other support member is located at the bottom end of the frame.

In some embodiments, which may include the above embodiments, the battery pack further includes at least one circuit board, where one circuit board faces one of the columns of cells, and the circuit board is electrically connected to each of the first tabs and each of the second tabs of the facing column of cells.

In some embodiments, which may include the above embodiments, further comprising: the box, the box parcel is in the framework outside.

The battery module that this embodiment provided, through including at least one electric core and framework, at least one electric core is located the framework, and at least one electric core top-down is range upon range of to become at least one, and at least one electric core sets up side by side, and the framework includes roof, bottom plate and at least one bandage, and the roof is located the top surface of framework, and the bottom plate is located the bottom surface of framework, and at least part bandage encloses the outside of establishing at roof and bottom plate. Establish the bandage in electric core periphery, fix electric core in the framework with the bandage, can reduce the quantity that sets up of curb plate, the overall structure of framework is comparatively simple, and weight is less. Therefore, the battery module that this embodiment provided has solved current frame structure comparatively complicacy, the great technical problem of weight.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is easy to see that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is an assembly view of a battery module according to an embodiment of the present invention;

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

fig. 3 is a structural diagram of a top plate in the battery module according to the embodiment of the invention.

Description of reference numerals:

10: an electric core;

20: a frame body;

30: a first insulating plate;

50: a separator plate;

60: a support member;

70: a circuit board;

210: a top plate;

211: a first fixed port;

220: a base plate;

221: a second fixed port;

230: binding bands;

240: an assembly hole;

250: reinforcing ribs;

260: and a limiting member.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Along with the development of lithium ion batteries, the requirement on the energy density of a battery module in the industry is higher and higher, and the composition efficiency of a battery core is more and more important.

Among the correlation technique, battery module includes that top-down stacks at the inside at least one electric core of framework, in order to fix electric core inside the framework, the framework includes a plurality of curb plates that roof, bottom plate and ring were established usually, and roof, bottom plate and curb plate enclose jointly and establish into comparatively inclosed holding chamber.

However, the frame has more side plates, which makes the overall structure of the frame more complicated and heavier.

In order to solve the above problem, this embodiment provides a battery module, establishes the bandage in electric core periphery, fixes electric core in the frame with the bandage, can reduce the quantity that sets up of curb plate, and the overall structure of frame is comparatively simple, and weight is less.

As shown in fig. 1, the present embodiment provides a battery module, including: at least one battery cell 10 and a frame 20, the frame 20 serves as an external envelope of the battery cell 10, and fixes and protects the battery cell 10. At least one battery cell 10 is located in the frame 20, and the at least one battery cell 10 is stacked in at least one row from top to bottom. For example, the battery cells 10 may be arranged in parallel in 1 column, 2 columns, 3 columns, 4 columns or other numbers, which is not limited herein.

Further, as shown in fig. 2, the frame 20 includes a top plate 210, a bottom plate 220 and at least one binding band 230, the top plate 210 is located on the top surface of the frame 20, the bottom plate 220 is located on the bottom surface of the frame 20, and at least a portion of the binding band 230 is enclosed outside the top plate 210 and the bottom plate 220. The battery cell 10 is located between the top plate 210 and the bottom plate 220, and the top plate 210 and the bottom plate 220 are fixed to the outer side of the battery cell 10 by the binding bands 230.

It should be noted that, as shown in fig. 2, stacking the battery cells 10 from top to bottom refers to stacking the battery cells in a direction from the top plate 210 to the bottom plate 220, and when the placement direction of the frame 20 changes, the direction from the top plate 210 to the bottom plate 220 is not from top to bottom, but is the other direction. In actual use, the arrangement direction of the frame 20 may be set as needed.

The binding band 230 may be arranged around the outer side of the battery cells 10 along the direction in which the battery cells 10 in each row are arranged side by side; alternatively, the binding band 230 may be arranged around the outer side of the battery cells 10 in a direction perpendicular to the rows of the battery cells 10; alternatively, the binding bands 230 may be arranged to surround the outer sides of the columns of battery cells 10 in a crossed manner.

The number of straps 230 may be 1, 2, 3, 4, 6, or other number, without limitation.

Specifically, as shown in fig. 1, the binding bands 230 are respectively disposed in a direction parallel to the rows of the battery cells 10, the binding bands 230 may be respectively disposed in the middle and at both ends of the frame 20, and the force applied to each binding band 230 is relatively uniform.

The battery cell 10 may expand and contract during charging and discharging. In order to avoid the undesirable phenomena of deformation of the battery cell 10, poor contact between the electrode plates in the battery cell 10, powder falling and the like caused by expansion in the charging and discharging processes of the battery cell 10, an elastic layer is generally arranged between two adjacent layers of the battery cell 10, so as to buffer the expansion of the battery cell 10.

The band 230 may have certain elasticity, and at least a part of the elastic layer is replaced with the band 230, and the expansion of the battery module during the charge and discharge processes is buffered at least by the band 230; or, by providing the band 230 to reduce the thickness of at least a portion of the elastic layer, the expansion of the battery module during the charge and discharge processes is buffered by the band 230 and the elastic layer. The thickness of the strap 230 is thin, the volume is small, and the weight is light, so that the thickness and the weight of the battery module are greatly reduced, the volume of the battery module is reduced, and the energy density of the battery module is increased.

For example, the strap 230 may be a PET plastic strap, which has a low cost, a high strength and elasticity, and a certain buffering effect while ensuring the strength of the whole frame 20. The battery cell 10 can be fixed after the PET plastic steel strip is hot-melted by a packaging machine.

Further, in order to reduce the shearing force of the strap 230 to the top plate 210 and the bottom plate 220, the top plate 210 and the bottom plate 220 may be subjected to a chamfering process. For example, the cross-sections of the side edges of the top plate 210 and the bottom plate 220 contacting the binding band 230 in the vertical direction are set to be circular arc shapes, or the side edges are chamfered.

The battery module provided by this embodiment, through including at least one battery cell 10 and framework 20, at least one battery cell 10 is located in framework 20, and at least one battery cell 10 is range upon range of into at least one row from top to bottom, and at least one row of battery cell 10 sets up side by side, and framework 20 includes roof 210, bottom plate 220 and at least one bandage 230, and roof 210 is located the top surface of framework 20, and bottom plate 220 is located the bottom surface of framework 20, and at least part bandage 230 encloses the outside of establishing at roof 210 and bottom plate 220. The binding band 230 is arranged on the periphery of the battery cell 10, and the battery cell 10 is fixed in the frame body 20 by the binding band 230, so that the number of side plates can be reduced, and the frame body 20 has a simpler overall structure and a smaller weight. Therefore, the battery module that this embodiment provided has solved current frame structure comparatively complicacy, the great technical problem of weight.

In this embodiment, at least one first fixing opening 211 is disposed at two opposite sides of the top plate 210 at intervals, and one of the first fixing openings 211 at one side of the top plate 210 is disposed opposite to one of the first fixing openings 211 at the other side of the top plate 210. At least one second fixing opening 221 is respectively disposed at two opposite sides of the bottom plate 220 at intervals, and one of the second fixing openings 221 at one side of the bottom plate 220 is disposed opposite to one of the second fixing openings 221 at the other side of the bottom plate 220. One of the first fixing openings 211 is disposed opposite to one of the second fixing openings 221 in the vertical direction, and at least a portion of the binding band 230 is disposed through the first fixing openings 211 and the second fixing openings 221. The first fixing opening 211 and the second fixing opening 221 position the binding band 230, so that the binding band 230 is prevented from moving in a direction perpendicular to the surrounding direction of the binding band 230, and the strength of the frame body 20 is prevented from being reduced due to the change of the distance between the binding bands 230. In addition, the portions of the side edges of the top plate 210 and the bottom plate 220, which are not provided with the fixing openings, can prevent the inner wall of the outer case of the battery module from contacting the battery cell 10.

It should be noted that, as shown in fig. 2, the first fixing hole 211 and the second fixing hole 221 are disposed opposite to each other in a vertical direction, where the vertical direction is the direction from the top plate 210 to the bottom plate 220, and when the placing direction of the frame body 20 is changed, the direction from the top plate 210 to the bottom plate 220 is not the vertical direction any longer, but is the other direction. In actual use, the arrangement direction of the frame 20 may be set as needed.

Further, the binding band 230 may be entirely enclosed outside the entire frame 20 to fix the battery cell 10.

Alternatively, the strap 230 may be partially enclosed on the outside of the frame 20 and partially enclosed on the inside of the frame 20. As shown in fig. 2, a part of the binding band 230 is enclosed outside the frame body 20, and the rest of the binding band 230 is located between two adjacent columns of the battery cells 10. Through the bandage 230 between two adjacent electric core 10 of being listed as can separate two adjacent electric core 10, avoid two adjacent excessive mutual extrusion or dislocation between electric core 10, fixed effect is better.

Specifically, at least one assembly hole 240 may be respectively formed in the top plate 210 and the bottom plate 220, which are opposite to each other in the area between two adjacent columns of the battery cells 10, where one assembly hole 240 located in the top plate 210 and one assembly hole 240 located in the bottom plate 220 are arranged oppositely, and the assembly holes 240 in the top plate 210 and the bottom plate 220 are arranged in a one-to-one correspondence manner. The strap 230 is inserted through two oppositely disposed assembly holes 240. When electric core 10 has more than two, the setting of pilot hole 240 can make bandage 230 pass, by the fixed multiseriate electric core 10 of bandage 230, can strengthen multiseriate electric core 10's structural stability, improvement space utilization that simultaneously can also be better.

At least one binding band 230 is arranged around a row of battery cells 10, and the outer sides of the top plate 210 and the bottom plate 220 opposite to the row of battery cells 10. The binding bands 230 are at least arranged around the outer sides of a row of battery cells 10, and the number of the binding bands 230 around the outer sides of a row of battery cells 10 may be 1, 2, 3 or other numbers. The number of the binding bands 230 enclosed by each column of the battery cells 10 may be the same or different.

Specifically, as shown in fig. 2, the frame 20 has six binding bands 230, the battery cells 10 are arranged in two rows, the binding bands 230 are also divided into two rows, and one row of the battery cells 10 corresponds to one row of the binding bands 230. A row of binding bands 230 are arranged around the top surfaces of the top plates 210 and the bottom surfaces of the bottom plates 220 opposite to the row of battery cells 10 and the opposite two sides of the row of battery cells 10; another row of straps 230 is disposed around the top surface of the top plate 210, the bottom surface of the bottom plate 220, and the opposite sides of the row of cells 10 opposite to the other row of cells 10. The fitting hole 240, the first fixing hole 211 and the second fixing hole 221 may all play a role of positioning the strap 230. One row of the binding bands 230 is inserted through the first and second fixing holes 211 and 221 and the middle assembly hole 240 on the same side of the top and bottom plates 210 and 220, and the other row of the binding bands 230 is inserted through the first and second fixing holes 211 and 221 and the middle assembly hole 240 on the other side of the top and bottom plates 210 and 220.

When the battery cells 10 are arranged in three rows, the tie straps 230 on the middle row of battery cells 10 pass through the assembly holes 240 on both sides of the row of battery cells 10, so as to fix the row of battery cells 10 in the frame 20. Two rows of outer cell cores 10 on two sides of the row of cell cores 10 are similar to the two rows of cell cores 10 in parallel, and the description is omitted here. In this way, three rows of battery cells 10 are fixed inside the frame 20, and the three rows of battery cells 10 are separated by the binding band 230.

As shown in fig. 3, in the present embodiment, in order to reinforce the strength of the top plate 210 and the bottom plate 220, at least one reinforcing rib 250 is provided at intervals on each of the top plate 210 and the bottom plate 220, a portion of the top plate 210 protrudes toward the top surface of the battery module to form the reinforcing rib 250 on the top plate 210, and a portion of the bottom plate 220 protrudes away from the top surface of the battery module to form the reinforcing rib 250 on the bottom plate 220. Since the reinforcing beads 250 have a large thickness, the bending resistance of the reinforcing beads 250 is increased, thereby enhancing the strength of the top plate 210 and the bottom plate 220. The ribs 250 are provided toward the outer sides of the frame 20, respectively, to avoid an influence on the battery cells 10 inside the frame 20.

The number of the reinforcing ribs 250 may be 1, 2, 3, 4, 5 or other numbers, which is not limited herein. The top plate 210 and the bottom plate 220 may have the same or different number of ribs 250. The fitting holes 240 may be provided to avoid the reinforcing bars 250 to avoid an influence on the strength of the reinforcing bars 250.

In this embodiment, at least one limiting member 260 is disposed on the top plate 210 at intervals, and the limiting member 260 on the top plate 210 is disposed at an edge of a side of the top plate 210 facing the bottom plate 220; at least one limiting member 260 is disposed on the bottom plate 220 at an interval, the limiting members 260 on the bottom plate 220 are disposed on the edge of one side of the bottom plate 220 facing the top plate 210, and the limiting members 260 are all located on the outer side of the battery cell 10.

For example, the retaining member 260 may be a bolt, a rivet, or other protruding structure, which is not limited herein.

In the direction in which each row of battery cells 10 is arranged side by side, the limiting members 260 may be disposed at the edges of the two opposite ends of the top plate 210, the number of the limiting members 260 at the two ends may be the same, and the number of the limiting members 260 at the two ends may also be different. The stopper 260 further fixes the battery cell 10. The stopper 260 on the bottom plate 220 is similar to the stopper 260 on the top plate 210 in principle, and will not be described again.

In this embodiment, a first insulating plate 30 is disposed between the top plate 210 and the battery cell 10, and the first insulating plate 30 may insulate the battery cell 10.

Optionally, a second insulating plate is disposed between the bottom plate 220 and the battery cell 10, and the second insulating plate may insulate the battery cell 10.

In this embodiment, a separation plate 50 is disposed on one side of the frame 20, each of the battery cells 10 includes a first tab and a second tab, the first tab and the second tab are disposed on the same side of the frame 20, the first tab and the second tab extend from the battery cell 10, a direction in which the first tab and the second tab extend from the battery cell 10 is perpendicular to a direction in which the battery cells 10 in each row are arranged side by side, and the separation plate 50 covers the first tab and the second tab. The separator 50 seals the first tab and the second tab between the separator 50 and the frame 20, and serves to insulate the first tab and the second tab.

For example, the separator 50 may be bonded to the tab, the separator 50 may prevent the tab from being exposed, and the separator 50 may support the tab.

In this embodiment, the battery further includes at least one circuit board 70, where one circuit board 70 faces one of the battery cells 10 in one column. For example, when the number of the battery cells 10 is 1, the number of the circuit boards 70 is 1; when the number of the battery cells 10 is 2, the number of the circuit boards 70 is 2, and so on, and the description is omitted. A circuit board 70 is electrically connected to each first tab and each second tab of a row of cells 10 opposite to the circuit board 70. The circuit board 70 may be connected to a bus bundle, and the bus bundle is connected to an external collector, and the collector collects the temperature and the voltage of the battery cell 10 through the circuit board 70. The arrangement of the circuit board 70 enables the arrangement of the collection wiring harness, the power lines and the like in the battery module to be more regular, the connection error caused by the complicated wiring harness during connection is avoided, and the automatic production is facilitated.

At least one copper bar is generally used to connect the electric core 10 in series or in parallel, and in order to accurately align and assemble the electrode lugs of the copper bar and the electric core 10, the electrode lugs need to be manually adjusted after the electric core 10 is stacked, and then are welded with the copper bar, so that the efficiency is low. And adopt circuit board 70, set up at least one connection piece on circuit board 70, the connection piece is connected with the utmost point ear on electric core 10, and its error rate is lower, can play the fool-proofing effect, need not accurate counterpoint and can connect, can realize automatic quick tack welding, has consequently simplified production technology, has improved production efficiency. For example, the circuit board 70 may be a printed circuit board.

For example, the connecting sheet on the circuit board 70 may be a nickel sheet, which has a lower melting point and is closer to the material of the tab, so as to reduce the surface treatment during connection. Of course, the connecting sheet may be made of other metal materials.

The circuit board 70 is disposed on a side of the isolation plate 50 facing the battery cell 10, the isolation plate 50 and the circuit board 70 may be connected by bonding or screwing, the isolation plate 50 may prevent the circuit board 70 from being exposed, and the isolation plate 50 may support the circuit board 70.

In this embodiment, two supporting members 60 are disposed between the frame 20 and the isolation plate 50, wherein one supporting member 60 is located at the top end of the frame 20, and the other supporting member 60 is located at the bottom end of the frame 20. The supporting member 60 has a certain thickness, and can support the isolating plate 50, thereby preventing the isolating plate 50 from being damaged by the tab and the circuit board 70.

In this embodiment, the outer side of the frame 20 may further include a box body, the box body is wrapped on the outer side of the frame 20, and the box body protects the battery cell 10, the frame 20, and other components inside the box body.

Furthermore, the opposite two side surfaces of the box body can be provided with grooves, rotatable handles are arranged in the grooves, the handles are integrally contained in the grooves when not used, the size occupied by the handles can be reduced, and the handles can be rotated and protrude out of the grooves when used so as to be held by hands.

In this embodiment, the positive electrode and the negative electrode of the battery module can be led out from the opening of the partition plate 50 through the connecting device, a support is arranged on one side of the partition plate 50 departing from the battery cell 10, the connecting device is fixed on the support, so that the contact between the positive electrode and the negative electrode and the box body are avoided, the short circuit is caused, and the safety of the battery module can be improved.

The both ends of box one side can set up anodal socket and negative pole socket respectively, and anodal electricity that anodal socket and battery module drawn forth is connected, and the negative pole electricity that negative pole socket and battery module drawn forth is connected, and positive negative pole socket sets up far away, avoids the wrong of positive negative pole socket distance near leading to insert, improves the safety in utilization.

In this embodiment, the isolation plate 50, the first insulation plate 30, the second insulation plate, the support member 60, etc. are made of an insulation material, such as foam, rubber or other insulation materials, which is not limited herein. Specifically, foam can be adopted, so that the cost is low and the process is simple. In addition, the foam has certain elasticity and certain buffering effect.

In the battery module provided in this embodiment, the battery cell 10 is fixed in the frame 20 surrounded by the top plate 210, the bottom plate 220, and the binding band 230, the overall volume and weight of the frame 20 are small, and the energy density of the battery module is high. The tab of the battery cell 10 is used for collecting temperature and pressure data through the circuit board 70, and the collection bus bundle is regularly arranged, so that the automatic production is easy. The box outside of battery module sets up anodal socket and negative pole socket and is connected with external circuit's both ends mouth respectively to make battery module carry out charge-discharge work.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery module, comprising: the battery cell comprises at least one battery cell and a frame body, wherein the battery cell is positioned in the frame body, the battery cell is stacked into at least one row from top to bottom, the battery cells are arranged side by side, the frame body comprises a top plate, a bottom plate and at least one binding belt, the top plate is positioned on the top surface of the frame body, the bottom plate is positioned on the bottom surface of the frame body, and the binding belt is arranged on the outer sides of the top plate, the bottom plate and part of the battery cell in a surrounding manner.

2. The battery module according to claim 1, wherein at least one first fixing opening is formed at two opposite sides of the top plate at intervals, and one of the first fixing openings at one side of the top plate is opposite to one of the first fixing openings at the other side of the top plate;

at least one second fixing port is respectively arranged on two opposite side edges of the bottom plate at intervals, and one of the second fixing ports on one side edge of the bottom plate is opposite to one of the second fixing ports on the other side edge of the bottom plate;

one of the first fixing openings and one of the second fixing openings are arranged oppositely in the vertical direction, and at least part of the binding band penetrates through the first fixing openings and the second fixing openings.

3. The battery module of claim 1, wherein the top plate and the bottom plate, which are opposite to each other in the area between two adjacent columns of the battery cells, respectively have at least one assembly hole, one of the assembly holes on the top plate and one of the assembly holes on the bottom plate are opposite to each other, and at least one of the straps passes through two opposite assembly holes on the top plate and the bottom plate to surround a part of the outer sides of the battery cells in one column and the outer sides of the top plate and the bottom plate.

4. The battery module according to any one of claims 1 to 3, wherein at least one reinforcing rib is provided at intervals on each of the top plate and the bottom plate, part of the top plate protrudes toward the top surface of the battery module to form the reinforcing rib on the top plate, and part of the bottom plate protrudes toward the top surface away from the battery module to form the reinforcing rib on the bottom plate.

5. The battery module according to any one of claims 1 to 3, wherein at least one stopper is disposed on each of the top plate and the bottom plate at an interval, the stopper on the top plate is disposed on an edge of a side of the top plate facing the bottom plate, the stopper on the bottom plate is disposed on an edge of a side of the bottom plate facing the top plate, and the stopper is located on an outer side of the battery cell.

6. The battery module according to any one of claims 1 to 3, wherein a first insulating plate is arranged between the top plate and the battery core;

and/or a second insulating plate is arranged between the bottom plate and the battery cell.

7. The battery module according to any one of claims 1 to 3, wherein a separator is disposed on one side of the frame, each of the cells includes a first tab and a second tab, the first tab and the second tab extend from the cell in a direction perpendicular to the cells, and the separator covers the first tab and the second tab.

8. The battery module according to claim 7, wherein two support members are disposed between the frame and the partition plate, one of the support members is disposed at the top end of the frame, and the other support member is disposed at the bottom end of the frame.

9. The battery module of claim 7, further comprising at least one circuit board, wherein one of the circuit boards faces one of the columns of cells, and the circuit board is electrically connected to the first tabs and the second tabs of the cells in the facing column.

10. The battery module according to any one of claims 1 to 3, further comprising: the box body is wrapped on the outer side of the frame body.