Lithium ion battery module and battery pack with same

Abstract

The utility model relates to the field of lithium ion batteries, and discloses a lithium ion battery module and a battery pack with the same. The assembly support comprises a vertical frame of an integrated structure, the vertical frame comprises a bottom frame, a top frame and two vertical frames, the bottom frame and the top frame are opposite, the two vertical frames are connected between the two tail ends of the bottom frame and the two tail ends of the top frame, the bottom frame, the top frame and the two frames are spaced faces in the vertical plane, and the top face of the bottom frame is a horizontal storage table. The storage table and the opposite inner side faces of the two frames form a storage frame, and the storage frame is divided into a front frame located on the front face of the spacing face and a rear frame located on the back face of the spacing face by the spacing face. One of the two single batteries is located in the front frame, the other of the two single batteries is located in the rear frame, the bottoms of every two single batteries are located on the storage table, the two sides of every two single batteries are limited to the inner side faces of the two frames respectively, the interval faces are arranged between the two single batteries in an interval mode, and tabs of the two single batteries extend out of the top frame to form two rows of tabs which are right opposite in the front-back direction; the two tabs in the same column are electrically connected to the top surface of the top frame, and the two battery monomers are connected in series or in parallel.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of battery pack especially relates to a lithium ion battery module and battery pack with module. BACKGROUND

[0002] With the more and more widely used battery, especially the application of lithium ion battery, the equipment using lithium ion battery is also more and more, and the use environment is also more and more complex and diverse. With the wide application of lithium ion battery, the market competition is more and more fierce, and the production cost, assembly, maintenance flexibility requirement of the manufacture of lithium ion battery pack and the maintenance in the use process of battery pack is also higher and higher.

[0003] The present lithium ion battery pack is mainly composed of battery core body, and the battery core body is wound by adhesive tape, so that the battery core is prone to loosen and fall off, and the maintenance of the battery pack is not facilitated. SUMMARY

[0004] One of the purposes of the embodiment of the utility model is to provide a lithium ion battery module and battery pack with module, and the application of the scheme is beneficial to improve the assembly efficiency of the battery pack.

[0005] The utility model embodiment provides a lithium ion battery module, including,

[0006] The assembly support includes a vertical frame of integrated structure, the vertical frame includes opposite bottom frame, top frame and two vertical side frames connected between the two ends of the bottom frame and the top frame,

[0007] The interval surface between the bottom frame, the top frame and the two side frames is a vertical plane, the top surface of the bottom frame is a horizontal object table, the object table and the opposite inner side surfaces of the two side frames form an object frame, and the interval surface separates the object frame into a front frame located on the front surface of the interval surface and a rear frame located on the back surface.

[0008] Two battery monomers, one of which is located in the front frame, and the other is located in the rear frame, the interval surface is separated between the two battery monomers, the bottoms of the two battery monomers are respectively located on the object table, and the two sides are respectively limited to the inner side surfaces of the two side frames.

[0009] The tab of each of the two battery monomers respectively extends from the top frame, forming two rows of front and back opposite tabs, the two tabs in the same row are electrically connected to the top surface of the top frame, and the two battery monomers are connected in series or parallel.

[0010] Optionally, each of the tabs is bent on the top surface of the top frame, and two bus bars made of conductive material are locked on the top surface of each column of the tabs, the two bus bars have an insulating spacing therebetween, and each column of the tabs is tightly attached between the top surface of the top frame and the bottom surface of each of the bus bars.

[0011] Optionally, two bus bars made of conductive material are locked on the top surface of the top frame, the two bus bars have an insulating spacing therebetween, and two columns of the tabs are respectively welded on the top surface of the two bus bars.

[0012] Optionally, a limiting groove extending in the front-rear direction is further provided on the top surface of the top frame, is located between the two bus bars, and has a lateral opening respectively formed on two groove edges of the limiting groove.

[0013] A temperature and voltage acquisition module is arranged in the limiting groove, the temperature and voltage acquisition module is internally provided with a circuit and a temperature sensor electrically connected to the circuit, and two extending portions extending outward are arranged on two edges of the temperature and voltage acquisition module, the extending portions extend out of the lateral opening and are electrically connected to the bus bars to acquire the voltage of each of the bus bars.

[0014] Optionally, a through hole penetrating in the front-rear direction is respectively arranged at each of four top corners of the upright frame, and the two battery monomers are both located in the space between the four through holes.

[0015] Optionally, a plurality of upright studs are further provided on the top surface of the top frame, and an insulating protective cover plate is fixed on the top of each of the studs.

[0016] Optionally, a plurality of holes penetrating in the front-rear direction are respectively arranged on the top frame and / or the bottom frame.

[0017] Optionally, the spacing surface is in the shape of a cross and is integrally connected with the bottom frame, the top frame and the two side frames.

[0018] Optionally, the width of the top frame is narrower than the width of the placement table and the width of each of the side frames, and the electrodes of each of the battery monomers extend from two edges of the top frame.

[0019] Optionally, a protruding positioning column and a recessed positioning hole are respectively arranged on the front-rear opposite end surfaces of the bottom frame, any of the positioning columns has the positioning hole opposite thereto, and any of the positioning holes has the positioning column opposite thereto.

[0020] Optionally, a first buckling part and a second buckling part that can be adaptively buckled are respectively arranged on the outer side surfaces of the two side frames.

[0021] Any of the first buckling parts on the outer side surface of any of the side frames has the second buckling part horizontally opposite thereto on the outer side surface of the other side frame.

[0022] Each of the second latching portions on the outer side of any of the aforementioned frame shall have a second latching portion on the outer side of the other of the aforementioned frame, which is horizontally opposite to it.

[0023] Secondly, this utility model provides a lithium-ion battery pack, including a plurality of lithium-ion battery modules as described above.

[0024] As can be seen from the above, the battery assembly bracket structure of this embodiment is compact. Battery cells are installed on both sides of the isolation surface of the bracket. The series and parallel connection between the tabs of the two battery cells can be made in the top frame to obtain a battery module. The bottom frame of the upright frame serves as the bottom support of the battery module.

[0025] This battery module has a compact structure and is easy to install, which helps improve the production efficiency of battery packs. Attached Figure Description

[0026] The accompanying drawings, which are provided to further illustrate the present invention and form part of this application, do not constitute an undue limitation of the present invention.

[0027] Figure 1 A three-dimensional structural diagram of the battery assembly bracket provided in an embodiment of this utility model;

[0028] Figure 2 A side view of the battery assembly bracket provided in an embodiment of this utility model;

[0029] Figure 3 This is a schematic diagram of the front and rear end face structures of the battery assembly bracket provided in an embodiment of the present utility model;

[0030] Figure 4 , 5 Top and bottom views of the battery assembly bracket provided in an embodiment of this utility model;

[0031] Figure 6 This is an exploded view of the battery module provided in an embodiment of the present invention;

[0032] Figure 7 This is a three-dimensional structural diagram of the battery module provided in an embodiment of the present utility model;

[0033] Figure 8 Schematic diagrams of the front and rear ends of the battery module provided in this embodiment of the utility model;

[0034] Figure 9 , 10 Side and top view structural diagrams of the battery module provided in the embodiments of this utility model;

[0035] Figures 11-15 These are schematic diagrams of the assembly structure of the lithium-ion battery pack provided in Embodiment 2.

[0036] Figure 16 This is an exploded view of the lithium-ion battery pack provided in Embodiment 2.

[0037] Figures 17-19 These are top view, front view (rear view), and side view structural schematic diagrams of the lithium-ion battery pack provided in Embodiment 2 of this utility model.

[0038] Figure 20 These are schematic diagrams of the lithium-ion battery pack provided in Embodiment 3 of this utility model.

[0039] 11: Base frame; 12: Top frame; 13: Frame; 14: Shelf; 15: Busbar fixing part;

[0040] 16: Spacer surface; 17: Through hole; 18: Hole portion; 19: Stud; 22: Limiting groove;

[0041] 61: Positioning pin; 62: Positioning hole; 63: First latching part; 64: Second latching part;

[0042] 21: Busbar; 23: Through slot; 24: Temperature and voltage acquisition module; 31: Battery cell;

[0043] 32: Electrode lug; 41: Screw; 42: Protective cover plate; 43: End plate; 44: Lifting hole;

[0044] 45: Insulating buffer sheet; 46: Insulating spacer block; 51: Insulating protective sleeve. Detailed Implementation

[0045] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention. Example

[0046] See Figures 1-20 Show.

[0047] This embodiment provides a battery mounting bracket suitable for lithium-ion battery packs and a battery module composed of the mounting bracket.

[0048] The main body of the mounting bracket is an upright frame made of a one-piece molded insulating material, such as, but not limited to, a rigid plastic part made of one-piece injection molding. A spacer surface 16 in a vertical plane is provided at the center of the upright frame. For ease of description, the side with the front of the spacer surface 16 is referred to as the front, and the side with the back of the spacer surface 16 is referred to as the rear.

[0049] The upright frame comprises a bottom frame 11, a top frame 12, and two upright side frames 13 between the bottom frame 11 and the top frame 12, the two side frames 13 are opposite to each other, the top of the two side frames 13 is connected with the left and right ends of the top frame 12, and the bottom of the two side frames 13 is connected with the left and right ends of the bottom frame 11, thereby forming a frame.

[0050] A horizontal placement table 14 is arranged on the top of the bottom frame 11, the left and right ends of the placement table 14 are connected with the lower ends of the two side frames 13 of the upright frame, thereby forming a placement frame, and the inner side of the two upright frames is the upright side frame of the placement frame.

[0051] When the battery assembly is assembled, one battery monomer 31 (or cell monomer) is placed on the placement table 14 of the front frame, and another battery monomer 31 is placed on the placement table 14 of the rear frame, the left and right sides of the two battery monomers 31 are respectively limited to the inner sides of the left and right side frames 13, and the spacer 16 is arranged between the two battery monomers 31.

[0052] As an example of the embodiment, preferably, the width of the top frame 12 in the front-rear direction is narrower than the width of the placement table 14, and is narrower than the width of the two side frames 13, the top frame 12 and the spacer 16 are arranged at the middle of the width of the placement table 14 and each side frame 13, and the electrodes of the two battery monomers 31 on the two sides of the spacer 16 respectively extend from the two sides of the top frame 12.

[0053] A busbar fixing part 15 is further arranged on the top surface of the top frame 12, in the embodiment, the positive and negative electrode lugs 32 of the battery monomer 21 commonly extend from the top end, two busbar fixing parts 15 are arranged on the top surface of the top frame 12, and the two busbars 21 have a certain spacing therebetween. The electrode lugs 32 of the two battery monomers 21 respectively extend from the two sides of the top frame 12, are bent on the top frame 12 to connect the electrode lugs 32 of the two battery monomers 31, and then the two busbars 21 are respectively fixed on the top frame 12, so that the connected electrode lugs 32 are tightly pressed under the busbars 21, the connection between the two battery monomers 31 is realized, and a battery module is obtained. The two battery monomers 31 can be connected in parallel or in series. As can be seen from the above, compared with the technical solution of the prior art that the electrode lugs 32 of the battery monomers 31 are welded on the top surface of the busbar 21, the present solution can lock the busbar 21 on the top frame 12 by using a screw to tightly press on the electrode lugs 32, so as to realize the fixation and electrical connection between the electrode lugs 32, the operation is more convenient, the welding equipment is not needed, the preparation cost is lower, and when the battery assembly is disassembled and the battery monomer 31 is replaced, the connection between the busbar 21 and the electrode lugs 32 can be removed by unscrewing the screw, which is flexible and convenient.

[0054] As can be seen from the above, the battery assembly support structure of the embodiment is compact, the battery monomer 31 is mounted on both sides of the isolation surface of the support, the series and parallel connection between the pole lug 32 of the two battery monomers 31 on the top frame 12 is obtained, the bottom frame 11 of the upright frame is used as the bottom support of the battery module, the battery module structure is compact and convenient to install, which is beneficial to improve the production efficiency of the battery pack.

[0055] As an example of the embodiment, a through hole 17 is provided at each of the four top corners of the upright frame, and the through hole 17 is located outside the storage frame, that is, the storage frame is located in the space between the through hole 17, and the position of the screw rod 41 is higher than the plane where the bus bar 21 is located.

[0056] When assembling the battery, a plurality of battery modules can be stacked front and back, the electrodes of the top frame 12 of each battery module are electrically connected according to the series and parallel connection relationship of each battery module of the battery pack, the four screw rods 41 are respectively inserted through the through holes 17 at the four top corners of each battery module, and the screw rods 41 are locked to tightly fit each battery module, and a plurality of battery modules form a larger battery pack. In actual application, the number of battery modules can be increased or decreased according to application needs, and when the battery pack is adjusted, assembled and disassembled, the user only needs to adjust the screw rod 41 of each top corner, without the need to replace the shell, which is beneficial to reduce the production materials of the battery pack and reduce the production cost.

[0057] As an example of the embodiment, a plurality of front and rear through holes 18 are hollowed out in the top frame 12 of the assembly support as weight reduction holes to reduce the weight of the battery module. These hole portions 18 are uniformly distributed on the top frame 12.

[0058] Similarly, a plurality of front and rear through holes 18 are also hollowed out in the bottom frame 11 as weight reduction holes, and the storage table 14 is located on the top surface of the bottom frame 11.

[0059] As an example of the embodiment, the spacing surface 16 in the shape of a "cross" can be used, but is not limited to, the spacing surface 16, which is hollowed out with front and rear through holes in the central inside of the upright frame close to the four top corners, and the spacing surface 16 is integrally connected with the left and right side frames 13, the bottom frame 11 and the top frame 12 in the shape of a "cross". The use of this structure is beneficial to save material cost, reduce the weight of the battery pack, and also beneficial to heat dissipation of the two battery monomers 31 on both sides of the spacing surface 16, and improve the heat dissipation effect.

[0060] As an example of the embodiment, the top of the top frame 12 is flat in the middle, and in the case where the positive and negative electrodes of the battery cells 31 extend from the top, the bus bars 21 made of conductive material can be fixed above the top frame 12 on the limiting platforms, and the tabs 32 of the battery cells 31 extending from the two sides of the top frame 12 can be bent on the top surface of the bus bars 21 and welded on the bus bars 21, so that the battery cells 31 are connected in series or in parallel through the bus bars 21, facilitating the assembly of the battery pack.

[0061] As an example of the embodiment, the top surface of the top frame 12 of the upright frame is also provided with a plurality of studs 19, the top of each stud 19 is flush, and the opening of the screw hole of each stud 19 faces upward, so that when the battery is assembled, an insulating protective cover plate 42 is installed on the top surface of the studs 19, and the electrode connecting components such as the bus bars 21 are covered below the protective cover plate 42 to prevent dust and moisture.

[0062] Although it is described that the embodiment is an example in which the positive and negative tabs 32 of the battery cells 31 extend from the top of the battery, and two bus bars 21 are provided on the top frame 12 of the assembly support, but in fact it is not limited to this. For example, when one of the positive and negative tabs 32 of the battery cell 31 extends from the top of the battery and the other extends from the bottom of the battery, bus bars 21 can be respectively provided on the top surface of the top frame 12 and the bottom surface of the bottom frame 11 to connect the tabs 32 between the two battery cells 31, realizing the series and parallel connection between the battery cells 31.

[0063] In addition, as an example of the embodiment, a limiting slot 22 extending in the front-rear direction is also provided in the middle of the top frame 12, and the limiting slot 22 is spaced between the two bus bars 21, so that the temperature and voltage acquisition module 24 can be laid in the limiting slot 22, and the temperature and voltage acquisition module 24 is provided with an extending portion extending outward, which is tightly attached to each bus bar 21, such as but not limited to being locked together with the bus bar 21 through the bus bar fixing portion 15, to realize real-time detection of the temperature of the battery module and ensure the safety of charging and discharging. Embodiment

[0064] Referring to Figures 1-20 As shown in the figure, the embodiment provides a lithium ion battery pack composed of at least two lithium ion battery modules shown in the embodiment.

[0065] Referring to the figure, according to the series and parallel connection relationship between the battery modules, the battery modules are sequentially arranged in a column with their front-rear faces (the largest area faces) facing each other, so that the electrodes that need to be connected between the two adjacent battery cells 31 are located in the same column and extend from the top.

[0066] In the battery pack body, the battery cells 31 of each battery module face each other, the through holes 17 at the four top corners of each upright frame are sequentially and oppositely arranged, that is, the through holes 17 are respectively arranged on four parallel straight lines, four threaded rods 41 are respectively inserted through the through holes 17 at the four top corners, the four threaded rods 41 connect the battery modules together, the two ends of each threaded rod 41 are locked, the upright frames of the lithium ion battery modules are sequentially and tightly arranged together, the battery cells 31 are encapsulated in the front frame and the rear frame of each upright frame, and are locked in the space between the four threaded rods 41, so as to obtain a battery pack body fixed together, and the tabs 32 of the battery cells 31 form two rows at the top of the battery pack body. The tabs 32 of each battery cell 31 extend from the top frame 12 of the upright frame where the tabs 32 are located to the top of the battery pack body, and the tabs 32 extending from the top are connected in series, in parallel, or in a combination of series and parallel, so as to obtain a battery pack body, and the battery pack body provides power supply to the outside through the total positive and negative electrodes.

[0067] As can be seen from the above, the battery pack of the embodiment is connected together by the plurality of battery modules through the threaded rods 41, the assembly of the battery pack is flexible and convenient, and the application is beneficial to improve the assembly efficiency and reduce the production cost.

[0068] When any battery cell 31 or battery module is damaged, the user can loosen the locked threaded rods 41, so as to remove the damaged battery cell 31 or battery module, replace or remove the battery cell 31 or battery module, and reassemble the battery pack by reinserting the four threaded rods 41 and locking the threaded rods 41. It can be seen that the battery pack of the embodiment has various application scenarios and is convenient to maintain.

[0069] As an example of the embodiment, a plurality of bus bars 21 made of conductive material with good conductivity are provided, which can be copper bus bars 21.

[0070] As an example of the embodiment, the electrodes of adjacent battery cells 31 are bent and tightly attached to the flat top surface of the top frame 12, the bus bar 21 is covered on the top surface of the electrode to be electrically connected to the same electrode node, the bus bar 21 is locked on the top frames 12, the tabs 32 to be electrically connected are tightly pressed on the bottom surface of the same bus bar 21, and are tightly attached between the top frame 12 and the bus bar 21, and are electrically connected together through the bus bar 21.

[0071] As another preferred embodiment of the present embodiment, a square through slot 23 can be provided on each busbar 21 for each tab 32 to pass through. The tabs 32 to be electrically connected to the same busbar 21 can be extended from the through slots 23 on the busbar 21. The busbars 21 can be locked on the top surface of the top frame 12, and then the tabs 32 can be bent and tightly attached to the top surface of the busbar 21 on which the tabs 32 are located, and laser welded to the top surface of the busbar 21. With this scheme, the connection between the tabs 32 and the busbars is more stable. Moreover, the tabs are located on the top surface of the busbars, and the series or parallel electrical connection relationship between the battery monomers 31 is more clearly visible.

[0072] As an example of the present embodiment, busbars 21 of multiple sizes can be designed according to the series or parallel relationship in the current batch of battery pack bodies, the number of battery modules contained, and the convenience of assembly. Two rows of busbars 21 can be formed on the top surface of the battery pack body, each row having multiple busbars 21, and each busbar 21 corresponding to multiple tabs 32 of the battery monomers 31.

[0073] As an example of the present embodiment, a limiting slot 22 can be provided on the top of each upright frame, which can be composed of limiting flaps on both sides of the limiting slot 22 and protruding from the top surface of the top frame 12. When the front and rear doors of each battery module are arranged opposite to each other, the limiting slots 22 on the top surface of each battery module are connected in front and back, and each busbar 21 is located on both sides of the connected limiting slots 22. A strip-shaped temperature and voltage acquisition module 24 can be provided on the top surface of the battery pack body and laid in the limiting slots 22 with the slot opening facing each other. The temperature and voltage acquisition module 24 is provided with a circuit and a temperature sensor electrically connected to the circuit, and a plurality of extension portions extending from both sides are also provided on both sides of the strip-shaped temperature and voltage acquisition module 24 in the length direction. Each extension portion is locked and electrically connected to the top surface of each busbar 21, and the voltage of the electrical connection of each locked busbar is acquired. The strip-shaped temperature and voltage acquisition module 24 detects the temperature of the predetermined detection position on the top surface of the battery pack body and acquires the voltage of the predetermined electrical node. The temperature detection value and the voltage acquisition value are transmitted to the charging and discharging control circuit to protect the safety of the battery pack. Moreover, the temperature detection data and the voltage acquisition data can also be output to the user to enable the user to grasp the state of the battery pack in real time and discover abnormalities in time to ensure the safety of the battery pack.

[0074] As an example of the present embodiment, the strip-shaped temperature and voltage acquisition module 24 can be made of a flexible circuit board. The temperature detection data and the voltage acquisition data can be transmitted through the electrical connection of the needle seat interface at one end of the strip-shaped temperature and voltage acquisition module 24.

[0075] As an embodiment of the present application, at least two threaded studs 19 are arranged on the top surface of each top frame 12, and threaded holes are arranged on the threaded studs 19, with the openings of the threaded holes facing upward. After the threaded rods 41 are locked, the electrical connection of the tabs 32 between the battery monomers 31, and the fixing of the temperature and voltage acquisition module 24 are completed, a protective cover plate 42 is arranged on the top of the battery pack body, the bottom surface of the protective cover plate 42 is supported on the top of each threaded stud 19, the protective cover plate 42 is locked, the bus bars 21, the temperature and voltage acquisition module 24 and other electrical connection components are completely covered below the protective cover plate 42, and a predetermined gap is provided between the protective cover plate 42 and the electrical connection components below. The design of the protective cover plate 42 is beneficial to improve the moisture-proof and dust-proof effect of the battery pack.

[0076] As an embodiment of the present application, the battery pack of the present application is also provided with two end plates 43, and through holes 17 are arranged on the two end plates 43, which are opposite to the through holes 17 at the four top corners of each upright frame. During assembly, the planar surface of the two end plates 43 is attached to the end surface of the battery module located at the two end sides of the battery pack body, the two ends of the four threaded rods 41 respectively pass through the through holes 17 at the four top corners of the two end plates 43, and the fastening nuts are screwed on the outer end surface of the two end plates 43, so that the battery modules are locked between the two end plates 43, and the battery monomers 31 are encapsulated in the upright frames of the battery modules. As an embodiment of the present application, the outer end surface of the two end plates 43 is respectively provided with a battery pack hoisting part, for example, a metal plate can be used as the end plate 43, and an insulating layer is sprayed on the surface of the metal plate. In addition, at least one horizontally bent metal part can also be formed on the outer end surface of the end plate 43, and a hoisting hole 44 is arranged on the metal part. The technical solution of the present application is beneficial to improve the structural fastening degree of the battery pack body, and the external mounting structure hoisted by the end plate 43 is beneficial to improve the anti-shock performance of the battery pack during use.

[0077] As an embodiment of the present application, a soft insulating buffer piece 45 can be further arranged between the inner end surface of the two end plates 43 and the outer end surface of the battery modules at the two ends, so as to further improve the anti-shock performance of the battery pack.

[0078] As an embodiment of the present application, a plurality of insulating spacer blocks 46 are fixed on the top surface of the battery pack body, the insulating spacer blocks 46 are higher than the top surface of each bus bar 21, and each insulating spacer block 46 is arranged between two adjacent bus bars 21 with different polarities to achieve insulating spacing.

[0079] As an embodiment of the present application, the total positive electrode and the total negative electrode of the battery pack body can be extended out of the two end plates 43 of the battery pack body and located outside the protective cover plate 42, so as to facilitate connection during application. In addition, an insulating protective sleeve 51 is sleeved on the total positive electrode and the total negative electrode, so as to improve the moisture-proof and dust-proof performance.

[0080] As an illustration of the embodiment, on the bottom frame 11 of the upright frame of each battery module, a protruding positioning column 61 and a recessed (or through) positioning hole 62 are arranged on each of the two opposite front and rear end surfaces of the bottom frame 11, so that the back surface of any positioning column 61 has a positioning hole 62 opposite to it on the back surface of the end surface, and the back surface of any positioning hole 62 has a positioning column 61 opposite to it on the back surface of the end surface, forming a one-to-one opposite relationship. In this way, when assembling the battery pack body of the embodiment, the bottom frames 11 of any two adjacent battery modules are made to face each other, and the positioning columns 61 on the two opposite bottom frames 11 are all positioned in the positioning holes 62 of the opposite bottom frames 11, thereby limiting the connection between the two opposite bottom frames 11 to avoid displacement, further facilitating positioning assembly, improving assembly efficiency, and improving the structural stability of the assembled battery pack.

[0081] The assembly process is as follows:

[0082] 1. Assemble the battery modules, as shown in Figures 6-10 , assemble two battery monomers 31 into an assembly support to obtain a battery module. A plurality of battery modules are obtained in this way.

[0083] 2. As shown in Figure 11 , according to the requirements of series and parallel connection, a predetermined number of battery modules are arranged face to face in a row, and the positioning holes 62 and positioning columns 61 on the bottom frames 11 of the modules are limited and fixed together.

[0084] 3. As shown in Figure 12 , end plates 43 (and insulating buffer sheets 45) are fixed at the front and rear ends of the row of battery modules, respectively, and a threaded rod 41 penetrates the end plates 43 and the row of battery modules, and the threaded rod 41 is locked on the outer end surfaces of the two end plates 43.

[0085] 4. As shown in Figure 13 , insulating spacer blocks 46 are installed between the electrode-different electric nodes of each adjacent electrode at the top of the battery pack.

[0086] 5. As shown in Figure 14 , busbars 21 are installed at the top of the battery pack, and the lug tabs 32 are electrically connected to the busbars 21; temperature and voltage acquisition modules 24 are installed.

[0087] 6. As shown in Figure 15 , electrode protection sleeves are installed, and protective cover plates 42 are installed, and the battery pack is obtained. Embodiment

[0088] As shown in Figures 1-20 .

[0089] The embodiment provides a battery pack composed of a plurality of battery packs as shown in Embodiment Two in series or parallel.

[0090] The two outer sides of the two side frames 13 of each battery module of the battery pack body of Embodiment Two are provided with first clamping parts 63 and second clamping parts 64, wherein the first clamping parts 63 and the second clamping parts 64 are clamping parts that can be clamped to each other, such as one being a post and the other being a hole part that is adapted to the post. On a vertical frame, any first clamping part 63 on the outer side of any side frame 13 has a horizontally opposite second clamping part 64 on the outer side of another side frame 13, and any second clamping part 64 on the outer side of any side frame 13 has a horizontally opposite first clamping part 63 on the outer side of another side frame 13. In this way, the battery pack body of the structure shown in Embodiment Two has a plurality of first clamping parts 63 and second clamping parts 64 distributed on the left and right outer sides perpendicular to the front and rear end plates 43. When the battery pack of the embodiment is further combined as a unit to form a larger battery pack, the battery pack units can be placed left and right relative to each other so that each first clamping part 63 on the outer side of each battery pack unit is clamped to the second clamping part 64 on the opposite outer side, i.e., the side clamping of two adjacent rows of battery pack units is connected together, and similarly, the connection between any adjacent battery pack units is made in this way. After assembly, the electrodes outside the end plates 43 of each battery pack unit are electrically connected (in series or parallel) using wires or jumper bars to obtain a further battery pack.

[0091] As can be seen from the above, the battery pack of the structure of the embodiment is flexible in assembly and can be adapted to various application occasions, which is conducive to the application and promotion of lithium ion batteries.

[0092] The above-described embodiments do not constitute a limitation on the scope of protection of the technical solutions. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the above-described embodiments should be included in the scope of protection of the technical solutions.

Claims

1. A lithium-ion battery module, characterized in that, include, The assembly bracket includes an integrated upright frame, which comprises a bottom frame, a top frame, and two upright side frames connected between the two ends of the bottom and top frames. Between the bottom frame, the top frame, and the two side frames is a vertical plane partition surface. The top surface of the bottom frame is a horizontal shelf. The shelf and the opposite inner surfaces of the two side frames form a shelf frame. The partition surface divides the shelf frame into a front frame located on the front of the partition surface and a back frame located on the back. Two battery cells, one located within the front frame and the other within the rear frame, are separated by a spacer surface. The bottoms of the two battery cells are located on the shelf, and their sides are respectively confined to the inner sides of the two frame panels. Each of the two battery cells has a tab extending from the top frame to form two rows of tabs facing each other. The two tabs in the same row are electrically connected to the top surface of the top frame. The two battery cells are connected in series or in parallel.

2. The lithium-ion battery module according to claim 1, characterized in that, Each of the aforementioned tabs is bent on the top surface of the top frame. Two busbars made of conductive material are also locked on the top surface of each row of tabs. There is an insulating gap between the two busbars. Each row of tabs is in close contact with the top surface of the top frame and the bottom surface of each busbar.

3. The lithium-ion battery module according to claim 1, characterized in that, Two busbars made of conductive material are also locked on the top surface of the top frame, with an insulating gap between the two busbars, and the two rows of electrodes are respectively welded to the top surface of the two busbars.

4. The lithium-ion battery module according to claim 2 or 3, characterized in that, The top surface of the top frame is also provided with a limiting groove extending in the front-to-back direction, located between the two busbars, and lateral openings are respectively opened on the two sides of the limiting groove. A temperature and voltage acquisition module is provided in the limiting groove. The temperature and voltage acquisition module is equipped with a circuit and a temperature sensor electrically connected to the circuit. The temperature and voltage acquisition module has outwardly extending protrusions on both sides. The protrusions extend out from the lateral opening and are electrically connected to the busbars to acquire the voltage of each busbar.

5. The lithium-ion battery module according to claim 1, characterized in that, The upright frame has through holes at the four corners, and the two battery cells are located in the space between the four through holes.

6. The lithium-ion battery module according to claim 1, characterized in that, The top surface of the top frame is also provided with a plurality of upright studs, and an insulating protective cover plate is fixed on the top of the studs.

7. The lithium-ion battery module according to claim 1, characterized in that, The top frame and / or bottom frame are provided with a plurality of through holes.

8. The lithium-ion battery module according to claim 1, characterized in that, The spacer surface is cross-shaped and is integrated with the bottom frame, top frame, and two side frames.

9. The lithium-ion battery module according to claim 1, characterized in that, The width of the top frame is narrower than the width of the shelf and narrower than the width of each of the side frames, and the electrodes of each battery cell extend from both sides of the top frame.

10. The lithium-ion battery module according to claim 1, characterized in that, The bottom frame has protruding positioning posts and recessed positioning holes on its front and back opposite ends. Each positioning post has a positioning hole opposite to it, and each positioning hole has a positioning post opposite to it.

11. The lithium-ion battery module according to claim 1, characterized in that, The outer sides of the two frames are respectively provided with a first latching part and a second latching part that can be adapted to the buckle. For each of the first latching portions on the outer side of any of the aforementioned frame pieces, there is a second latching portion on the outer side of the other frame piece that is horizontally opposite to it. Each of the second latching portions on the outer side of any of the aforementioned frame shall have a second latching portion on the outer side of the other of the aforementioned frame, which is horizontally opposite to it.

12. A lithium-ion battery pack, characterized in that, The lithium-ion battery module includes any one of claims 1 to 11.

Images