Battery module

Abstract

The invention discloses a battery module which comprises a battery main body, a battery end plate and an acquisition device, the battery main body comprises at least one battery cell, the battery end plate comprises a plastic end plate main body, and the end plate main body is arranged at the end part of the battery main body and is used for fixing the battery main body; the collection device comprises a blister tray, a blister upper cover, a collection assembly and a plurality of busbars. The plastic uptake tray supports the acquisition assembly and the plurality of busbars, the plastic uptake upper cover is connected with the plastic uptake tray, the acquisition assembly and the plurality of busbars are all located between the plastic uptake tray and the plastic uptake upper cover, the busbars are electrically connected with pole columns of the battery cells, the acquisition assembly is electrically connected with the plurality of busbars respectively and is led out outwards, and the acquisition assembly is connected with the plastic uptake tray. The pole of the battery cell is led out; the battery module mainly solves the technical problems of how to reduce the mass of the battery module to improve the energy density of the battery module and how to reduce the manufacturing cost of the battery module on the premise of ensuring the reliability and safety of the battery module.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a battery module. Background Art

[0002] At present, the energy density of the battery pack is a very important indicator. During production, a single battery cell is manufactured first, and then multiple battery cells are assembled into a battery module. Finally, the battery module and electrical components are assembled into a complete battery pack. The lightweight of the battery pack can increase the energy density of the battery pack. At present, for safety and cost considerations, the lightweighting of single battery cells and other components in the battery pack except the battery module has been demonstrated through a large number of simulations and experiments. It is difficult to obtain obvious results. The requirements for materials and processes used in the assembly of battery modules are relatively loose, so corresponding lightweight designs can be made to leave a certain amount of space for other components in the battery pack to ensure the safety and reliability of the overall design.

[0003] In the prior art, the battery module mainly includes a battery body, an end plate and a collection device, wherein the battery body includes one or more cells, the end plate is used to fix the battery body, the collection device is electrically connected to the poles of the multiple cells, and the collection device is used to lead the poles of the cells outward, so as to monitor the voltage data or temperature data of the cells. At present, the end plate uses hollow metal as the base material (such as extruded aluminum plate or die-cast aluminum), which makes the weight of the end plate relatively heavy. At the same time, in order to weld and match, the side plate of the battery module also needs to be made of aluminum, which makes the end plate heavier and the battery module larger in shape. The overall quality of the battery module is difficult to reduce, and the welding process is also more complicated, resulting in the problem of high manufacturing cost of the battery module and low yield rate. In addition, the current collection device also has the disadvantages of heavy weight and high manufacturing cost, which leads to the total weight of the battery module being in a heavy state, thereby greatly limiting the energy density of the battery module and making the manufacturing cost of the battery module higher. At present, how to reduce the mass of the battery module to improve the energy density of the battery module and how to reduce the manufacturing cost of the battery module while ensuring the reliability and safety of the battery module is a technical problem in the current battery field. Summary of the invention

[0004] The object of the present invention is to provide a battery module, which mainly solves the technical problem of how to reduce the mass of the battery module to improve the energy density of the battery module and how to reduce the manufacturing cost of the battery module while ensuring the reliability and safety of the battery module.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A battery module comprises a battery body, a battery end plate and a collection device, wherein the battery body comprises at least one battery cell, the battery end plate comprises an end plate body, the end plate body is arranged at the end of the battery body and is used to fix the battery body, and the end plate body is an injection molded part with a hollow structure;

[0007] The collection device includes a blister tray, a blister cover, a collection component and a plurality of bus bars; the blister tray supports the collection component and the plurality of bus bars, the blister cover is connected to the blister tray, and the collection component and the plurality of bus bars are located between the blister tray and the blister cover, the bus bars are electrically connected to the poles of the battery cells, and the collection components are electrically connected to the plurality of bus bars respectively and are led outwardly to lead the poles of the battery cells outwardly.

[0008] In one of the technical solutions, the end plate body has a first surface arranged along the X direction, and the first surface has at least one binding groove arranged along the Y direction. The binding groove is used to embed and install at least part of the binding strap for binding the battery body and the end plate body. At least one metal reinforcement is also embedded in the end plate body along the Z direction.

[0009] In one of the technical solutions, the metal reinforcement is in a hollow structure to form a through hole, and a first connecting member is inserted into the hole.

[0010] In one of the technical solutions, an integrally injection-molded support member is protruding from the top of the end plate body, and the support member includes a supporting portion and a protruding portion arranged on the top surface of the supporting portion; the protruding portions are respectively protruding opposite to each other at the edges of the supporting portion, a second connecting member is fixed on the supporting portion, an output pole serving as a positive pole or a negative pole is led out from the battery body, and the output pole is fixed on the second connecting member.

[0011] In one of the technical solutions, the second connecting member includes at least two main body portions arranged at intervals, and a connecting portion is connected between two adjacent main body portions. The outer shape of the main body portion is larger than the outer shape of the connecting portion. The outer wall of the main body portion in the circumferential direction is arranged as a tooth-like structure. The support portion is provided with a mounting hole, and at least part of the second connecting member is embedded in the mounting hole, and the height of the second connecting member protruding from the support portion is less than the height of the protruding portion.

[0012] In one of the technical solutions, the collection component includes multiple wire harnesses, each of the wire harnesses is electrically connected to a corresponding one of the buses and led outwardly, the collection device also includes a cable tie, and the blister tray is provided with at least one hole structure for the cable tie to be passed through, the hole structure includes a first through hole and a second through hole passing through the blister tray, the cable tie passes through the first through hole and passes out from the second through hole and simultaneously binds the blister tray and at least one of the wire harnesses.

[0013] In one of the technical solutions, a recessed receiving groove and a plurality of recessed limiting grooves are provided on a side of the blister tray facing the blister cover, so that a first protruding structure corresponding to the receiving groove and a plurality of second protruding structures corresponding to the plurality of limiting grooves are formed on a side of the blister tray facing away from the blister cover, a plurality of wiring harnesses are received in the receiving groove, each of the bus bars is limited in a corresponding one of the limiting grooves, the hole structure is arranged at the bottom of the receiving groove, and the first through hole and the second through hole both penetrate the bottom of the receiving groove, and a penetrating avoidance hole is arranged on the bottom surface of the limiting groove, and the avoidance hole is used to avoid the bus bar from being connected to the poles of the battery cell.

[0014] In one of the technical solutions, the busbar includes two connecting bodies and a bending portion connected between the two connecting bodies, one of the connecting bodies is used to connect the pole of one of the battery cells, and the other connecting body is used to connect the pole of the adjacent battery cell;

[0015] The bottom surface of the limiting groove is provided with two penetrating avoidance holes, one of which is used to avoid the connection between one of the connecting bodies and the pole of one of the battery cells, and the other avoidance hole is used to avoid the connection between the other connecting body and the pole of the adjacent battery cell. The bottom surface of the limiting groove is provided with a concave recessed portion at a position between the two avoidance holes, and the recessed portion avoids the bending portion.

[0016] In one of the technical solutions, the collection component also includes a connector and a mounting plate, the mounting plate is fixed to the side of the blister tray facing the blister cover, the connector is bonded and fixed to the mounting plate, the ends of the plurality of wire harnesses are integrated in the connector, the blister tray and the mounting plate are fixed to each other by rivets, the blister tray is provided with the first through hole and the second through hole in the area overlapping with the mounting plate, the mounting plate is provided with a third through hole and a fourth through hole, the third through hole is connected to the first through hole, the fourth through hole is connected to the second through hole, the cable tie is simultaneously passed through the first through hole, the second through hole, the third through hole and the fourth through hole, and simultaneously bundles the blister tray, the mounting plate and the plurality of wire harnesses.

[0017] In one of the technical solutions, a plurality of recessed plug-in holes are provided on the outer edge of the blister tray facing the blister cover, so that a plurality of raised reinforcing columns are formed on the outer edge of the blister tray facing away from the blister cover, and a plurality of raised plug-in columns are provided on the blister cover, and each of the plug-in columns is plugged into a corresponding one of the plug-in holes in an interference fit manner.

[0018] Compared with the prior art, the battery module provided by the present invention has at least the following beneficial effects:

[0019] The end plate body used in the battery module of this solution is a non-metallic plastic part. Compared with the existing aluminum end plate, it can greatly reduce the weight of the battery module to improve the energy density of the battery module, and also make the battery module not need to add insulating materials such as insulating sheets at the end plate position, thereby improving the insulation and pressure resistance performance of the battery module, improving the safety and reliability of the battery module and reducing the difficulty of assembling the battery module, and also reducing the manufacturing cost of the battery module. In addition, since the collection device of this solution adopts a blister tray and a blister cover, this solution can reduce the weight of the battery module compared with the traditional collection device containing an injection molded base and an injection molded cover, so as to further improve the energy density of the battery module and greatly reduce the manufacturing cost of the battery module, and since the speed of hot pressing of the blister parts is extremely fast, it can also improve the production efficiency of the collection device. In summary, the use of this solution can achieve the purpose of reducing costs and increasing efficiency of battery modules without affecting the overall efficacy of the collection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the structure of a battery module provided in an embodiment of the present application;

[0022] Figure 2 A schematic diagram of the structure of a battery end plate provided in an embodiment of the present application;

[0023] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0024] Figure 4 A schematic diagram of the structure of a second connecting member provided in an embodiment of the present application;

[0025] Figure 5A schematic diagram of the structure of a collection device provided in an embodiment of the present application;

[0026] Figure 6 A schematic diagram of the structure of the collection device provided in the embodiment of the present application after the blister cover is hidden;

[0027] Figure 7 for Figure 6 A partial enlarged view of the middle A;

[0028] Figure 8 for Figure 6 A partial enlarged view of point B in the middle;

[0029] Fig. 9 A schematic diagram of the structure of the front side of the blister tray provided in an embodiment of the present application;

[0030] Fig.10 for Fig. 9 A partial enlarged view of point C in the middle;

[0031] Fig.11 A schematic diagram of the structure of the back side of the blister tray provided in an embodiment of the present application;

[0032] Fig.12 A schematic diagram of the structure of a bus provided in an embodiment of the present application;

[0033] Fig.13 This is a schematic structural diagram of the back side of the blister cover provided in an embodiment of the present application.

[0034] Among them, the reference numerals in the figure are:

[0035] 1. Battery body; 11. Battery core; 12. Output pole;

[0036] 2. Battery end plate; 21. End plate body; 211. Concave hole; 212. Reinforcement rib; 213. Countersunk hole; 214. Support member; 2141. Support portion; 2142. Protrusion; 2143. Mounting hole; 215. Second connecting member; 2151. Threaded hole; 2152. Main body; 2153. Connecting portion; 2154. Toothed structure; 216. First surface; 217. Binding groove; 22. Metal reinforcement member; 221. Middle hole; 23. First connecting member; 231. Head; 232. Screw portion; 3. Binding strap;

[0037] 4. Collection device; 40. Protection part; 41. Blister tray; 410. Channel; 411. Hole structure; 4111. First through hole; 4112. Second through hole; 412. Receiving slot; 413. Limiting slot; 414. Avoidance hole; 415. Concave part; 416. Plug hole; 417. Strengthening column; 418. Clamping column; 419. Buckle part; 42. Blister cover; 421. Plug column; 422. Muscle structure; 4 23. Protective part; 43. Collection component; 431. Wire harness; 4311. Wire body; 4312. Clamp; 4313. Conductor; 432. Water drop head temperature sensor; 44. Bus; 441. Connection body; 442. Bending part; 45. Cable tie; 46. Connector; 47. Mounting plate; 471. Third through hole; 472. Fourth through hole; 48. First protrusion structure; 49. Second protrusion structure. DETAILED DESCRIPTION

[0038] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0039] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0040] It should be understood that the orientations or positional relationships indicated by terms such as "upper", "lower", "top", "bottom", "inside", and "outside" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0042] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0043] See also Figure 1The battery module also includes at least one strap 3, through which the battery body 1 and the two battery end plates 2 are simultaneously bundled, so that the two battery end plates 2 jointly clamp the battery body 1 to achieve the fixation of the battery body 1.

[0044] Please refer to the Figures 1 to 3 The battery end plate 2 of this embodiment specifically includes an end plate body 21 and a metal reinforcement 22, wherein the end plate body 21 is used to be directly arranged at the end of the battery body 1 to clamp and fix the battery body 1, and the side of the end plate body 21 along the X direction and facing away from the battery body 1 is a first surface 216, and the first surface 216 is actually the outer surface of the end plate body 21. A concave binding groove 217 is provided on the first surface 216 and is used to embed at least part of the above-mentioned binding band 3. The length of the binding groove 217 extends along the Y direction. The binding groove 217 plays a role in limiting the binding band 3, reducing the risk of the binding band 3 being detached from the end plate body 21, thereby improving the reliability of the binding band 3 binding the end plate body 21 and the battery body 1. The end plate body 21 is an injection-molded plastic part, and the end plate body 21 is a hollow structure. Compared with the existing aluminum end plate, the non-metallic end plate body 21 can significantly reduce the mass of the battery module to improve the energy density of the battery module, and also makes it unnecessary for the battery module to add insulating materials such as insulating sheets at the end plate position, thereby improving the insulation and withstand voltage performance of the battery module and improving the safety and reliability of the battery module. Secondly, a plurality of recessed holes 211 are provided on the end plate body 21, so that the end plate body 21 is a hollow structure, so as to further reduce the mass of the end plate body 21, thereby further reducing the mass of the battery module. Moreover, the plurality of recessed holes 211 form a plurality of reinforcing ribs 212 in the end plate body 21, so as to reduce the mass of the end plate body 21 while ensuring that the end plate body 21 has reliable strength, thereby improving the safety and reliability of the battery module. In addition, the metal reinforcement 22 of the present solution is embedded in the end plate body 21 along the Z direction, thereby further improving the strength of the end plate body 21, and further improving the safety and reliability of the battery module. Figure 1 and Figure 2 As shown, when there are multiple binding grooves 217 , the multiple binding grooves 217 are recessed at intervals on the first surface 216 to improve the reliability of the multiple binding bands 3 binding the end plate body 21 and the battery body 1 together.

[0045] Please also read Figure 2 and Figure 3 The metal reinforcement 22 is provided with a through hole 221 in the middle thereof, and the through hole 221 enables the metal reinforcement 22 to form a hollow tubular structure. The metal reinforcement 22 is preferably a steel tube with high strength and hardness to improve the overall strength of the battery end plate 2. Preferably, as Figure 1As shown, the end plate body 21 is connected with the metal reinforcement 22 at the middle and two end positions along the Y direction, so that the overall strength of the battery end plate 2 is more reliable. In addition, a first connector 23 is also inserted into the through hole 221, and the first connector 23 is used to fix the entire battery module at a specified position of the box. Specifically, the first connector 23 is preferably a bolt, and the first connector 23 specifically includes a connected head 231 and a screw portion 232. The screw portion 232 is inserted into the through hole 221 and is used to fix the entire battery module at a specified position of the box. The top surface of the end plate body 21 is provided with a recessed countersunk hole 213 at a position corresponding to the metal reinforcement 22, and the head 231 of the first connector 23 is located in the countersunk hole 213 to limit the position of the first connector 23, so that the first connector 23 and the metal reinforcement 22 of the tubular structure are in better contact.

[0046] Please also read Figures 1 to 3 In this embodiment, an upwardly protruding support member 214 is also provided on the outer surface of the end plate body 21. An output pole 12 as a positive pole or a negative pole is led outward from the battery body 1. This support member 214 is used to support and fix the output pole 12, so that the end plate body 21 has the function of fixing the output pole 12 in addition to the function of fixing the battery body 1. By providing this support member 214 on the end plate body 21, the insulating seat traditionally installed on the end plate and also used to fix the output pole 12 can be discarded, thereby simplifying the assembly difficulty of the battery module and improving the assembly efficiency of the battery module. Specifically, the support member 214 includes a support portion 2141 and a protruding portion 2142 provided on the top surface of the support portion 2141. The protruding portions 2142 are respectively provided at the edge of the support portion 2141 and protrude relative to each other. The support portion 2141 is used to support the output pole 12, and the protruding portion 2142 is used to limit the position of the output pole 12. Preferably, two support members 214 are provided on the end plate body 21, wherein one support member 214 is used to support the output pole 12 led out of the battery body 1 and serving as the positive pole, and the other support member 214 is used to support the output pole 12 led out of the battery body 1 and serving as the negative pole.

[0047] Please refer to the Figures 1 to 3, an installation hole 2143 is provided on the support part 2141. A second connecting part 215 is embedded in the installation hole 2143. At least part of the second connecting part 215 is embedded in the installation hole 2143. A threaded hole 2151 is provided in the second connecting part 215. Correspondingly, a hole position needs to be provided on the output pole 12. By passing a screw through the hole position and screwing it into the threaded hole 2151, the output pole 12 led out from the battery body 1 can be fixed on the second connecting part 215. In this embodiment, the top surface of the second connecting part 215 preferably protrudes from the support part 214, so that the heat on the output pole 12 will not accumulate on the support part 214, thereby improving the safety performance of battery use. However, the height by which the second connecting part 215 protrudes from the support part 2141 is less than the height of the protruding part 2142, so that when the output pole 12 is fixed on the top surface of the second connecting part 215, the protruding parts 2142 on both sides can function to limit the output pole 12. Among them, the second connecting part 215 is preferably a nut.

[0048] Please refer to Figure 4 , the second connecting part 215 specifically includes two spaced main body parts 2152. A connecting part 2153 is connected between every two adjacent main body parts 2152. Moreover, the outer shape of the main body part 2152 is larger than the outer shape of the connecting part 2153. The above-mentioned threaded hole 2151 preferably penetrates through all the main body parts 2152 and all the connecting parts 2153. The outer wall in the circumferential direction of the main body part 2152 is provided with a toothed structure 2154. During installation, the toothed structures 2154 on the outer walls of the main body parts 2152 will engage with the hole walls in the installation hole 2143 to improve the biting force between the second connecting part 215 and the support part 214, solve the problem that the second connecting part 215 may become loose on the support part 214, and thus improve the reliability of the output pole 12 being firmly fixed on the support part 214. In this embodiment, the number of the main body parts 2152 is preferably three, that is, the number of the connecting parts 2153 is two, so that the cross-sectional shape of the second connecting part 215 is in the shape of a "king".

[0049] Please refer to Figure 1 , the acquisition device 4 is preferably arranged on the top of the battery body 1. A protection part 40 extends from the acquisition device 4. This protection part 40 is located directly above the output pole 12 led out from the battery body 1. It can be seen that the acquisition device 4 not only plays a role in leading out the pole column of the battery cell 11 to facilitate obtaining the voltage data or temperature data of the battery cell 11, but also plays a role in covering the battery cell 11 and the output pole 12 at the same time, thereby playing a better protective role for the battery cell 11 and the output pole 12, and at the same time avoiding the phenomenon that operators are prone to accidentally touch the battery cell 11 or the output pole 12 and cause electric shock, so that the battery module has better electrical protection.

[0050] Please refer to together Figures 5 to 8The collection device 4 of this embodiment mainly includes a blister tray 41, a blister cover 42, a collection component 43 and a plurality of bus bars 44, wherein the blister tray 41 and the blister cover 42 are both blister parts formed by hot pressing, the blister tray 41 is used to simultaneously support the collection component 43 and the plurality of bus bars 44, the blister cover 42 and the blister tray 41 are connected, and the collection component 43 and the plurality of bus bars 44 are both located between the blister tray 41 and the blister cover 42, in other words, the blister cover 42 is used to cover the collection component 43 and the plurality of bus bars 44 to protect the bus bars 44 and the collection component 43, and at the same time, the blister cover 42 also prevents the operator from accidentally touching the collection component 43 or the bus bar 44 and causing electric shock. Among them, each busbar 44 is electrically connected to the pole of the battery cell 11, and the collection component 43 adopts a flexible circuit board (i.e., FPC) or a wiring harness structure to connect to multiple busbars 44 and lead out, so that the electrical properties of the poles of each battery cell 11 can be led out, so as to collect the voltage data or temperature data of each battery cell 11. Compared with the traditional collection device containing an injection molded base and an injection molded upper cover, the collection device using a blister tray 41 and a blister upper cover 42 in this solution can greatly reduce the cost, and because the speed of hot pressing the blister parts is extremely fast, the production efficiency of the collection device 4 can be improved. In other words, the use of this solution, without affecting the overall efficacy of the collection device 4, enables the battery module to achieve the purpose of reducing costs and increasing efficiency. In addition, since the blister tray 41 and the blister upper cover 42 of this solution are both lightweight blister parts, the overall mass of the collection device 4 can be reduced to improve the energy density of the battery module.

[0051] In this embodiment, the bus 44 is used to connect two adjacent battery cells 11 in series or in parallel. In other words, each bus 44 is connected to both the first pole of one of the battery cells 11 and the second pole of the other battery cell 11. When the polarities of the first pole and the second pole are opposite, the bus 44 is used to connect the two battery cells 11 in series. When the polarities of the first pole and the second pole are the same, the bus 44 is used to connect the two battery cells 11 in parallel.

[0052] Please also read Figure 6 and Figure 7The collection component 43 of this embodiment is designed to include multiple wire harnesses 431, each wire harness 431 is electrically connected to a corresponding bus 44, and the wire harness 431 can lead out the polarity of the pole of the battery cell 11 connected to the bus 44. Compared with the current FPC with many conductive lines, the structure of using the wire harness 431 to lead out the pole of the battery cell 11 can further reduce the cost of the collection device 4. Based on this, in order to improve the stability of the wire harness 431 on the blister tray 41, the collection device 4 of this solution also includes a tie 45, and one or more hole structures 411 for the tie 45 to pass through are set on the blister tray 41. Specifically, the hole structure 411 includes a first through hole 4111 and a second through hole 4112 that penetrate the blister tray 41. During installation, the blister tray 41 and one or more wire harnesses 431 can be bundled together by inserting the cable tie 45 through the first through hole 4111 and passing it out through the second through hole 4112. Thus, the wire harness 431 is firmly restrained on the blister tray 41 to improve the stability of the collection device 4 during use. Compared with the current collection component bonded to the injection molded tray using FPC, since the cost of FPC is high and the glue between the FPC and the injection molded tray is prone to aging and failure, the present solution uses the structure of the wire harness 431 to derive the polarity of the pole of the battery cell 11 and fixes the wire harness 431 using the cable tie 45, which has the advantages of simpler structure, higher reliability of fixing the collection component 43, lower failure rate and lower cost.

[0053] Please refer again Figure 7 The wire harness 431 of this embodiment specifically includes a wire body 4311, a clamping member 4312 and a conductive member 4313, wherein the conductive member 4313 is preferably a nickel sheet with good conductivity, and the conductive member 4313 is welded on a corresponding bus 44. By providing the conductive member 4313, the contact area between the wire harness 431 and the bus 44 can be increased, thereby ensuring the stability of the connection between the wire harness 431 and the corresponding bus 44. The wire body 4311 is connected to the conductive member 4313, and the clamping member 4312 is bent and clamps the inner core of the conductive member 4313 and the wire body 4311 at the same time, so that the wire body 4311 can still maintain the reliability of mutual connection with the conductive member 4313 under a large tensile force, thereby reducing the risk of failure of the connection between the wire harness 431 and the bus 44. The clamping member 4312 and the conductive member 4313 can be a separate connection structure or an integrated structure.

[0054] See also Figure 8At least one wiring harness 431 is connected with a water droplet type temperature sensor 432. The water droplet type temperature sensor 432 and the bus 44 are bonded and contacted with each other by thermal conductive adhesive. The water droplet type temperature sensor 432 is used to obtain temperature data of the bus 44. Since the bus 44 is connected to the pole of the battery cell 11, the water droplet type temperature sensor 432 is equivalent to being used to obtain the internal temperature of the battery cell 11, so that corresponding control can be performed according to the actual temperature of the battery cell 11 (such as automatically cooling the battery cell 11). Compared with the traditional patch type temperature sensor, the water droplet type temperature sensor 432 has the advantages of being cheaper, simpler fixing method, and more secure connection.

[0055] Please refer again Figure 8 The collection component 43 also includes a connector 46. The ends of the above-mentioned multiple wire harnesses 431 are integrated in this connector 46. In order to reliably fix the connector 46, the collection component 43 of this embodiment also includes a hard mounting plate 47. The mounting plate 47 is arranged on the side of the blister tray 41 facing the blister upper cover 42. The mounting plate 47 and the blister tray 41 are preferably fixed by riveting with rivet columns. The connector 46 and the mounting plate 47 are fixed by glue. The mounting plate 47 is preferably an epoxy resin plate with suitable hardness and good thermal insulation and insulating properties. More specifically, the blister tray 41 is provided with the above-mentioned first through hole 4111 and the second through hole 4112 in the area overlapping with the mounting plate 47, and the mounting plate 47 is provided with a third through hole 471 and a fourth through hole 472, and the third through hole 471 and the first through hole 4111 are interconnected, and the fourth through hole 472 and the second through hole 4112 are interconnected. When the cable tie 45 is simultaneously inserted into the first through hole 4111, the second through hole 4112, the third through hole 471 and the fourth through hole 472, the cable tie 45 can bundle the end positions of the blister tray 41, the mounting plate 47 and the multiple wire harnesses 431 together to constrain the end positions of the multiple wire harnesses 431, thereby improving the stability of the collection device 4 during use.

[0056] Please also read Figure 6 , Figure 7 , Fig. 9 and Fig.10A concave receiving groove 412 is provided on one side of the blister tray 41 facing the blister upper cover 42, so that a first protruding structure 48 corresponding to the receiving groove 412 is formed on the side of the blister tray 41 facing away from the blister upper cover 42. A plurality of concave limiting grooves 413 are also provided on one side of the blister tray 41 facing the blister upper cover 42, so that a plurality of second protruding structures 49 corresponding to the plurality of limiting grooves 413 are formed on the side of the blister tray 41 facing away from the blister upper cover 42. The plurality of wiring harnesses 431 are all received in the receiving groove 412, and each bus 44 is limited in a corresponding limiting groove 413, so as to ensure that the bus 44 is firmly held in the blister tray 41, thereby improving the stability of the collection device 4 when used. The above-mentioned multiple hole structures 411 are arranged at the bottom of the receiving groove 412, that is, the first through hole 4111 and the second through hole 4112 both penetrate the bottom of the receiving groove 412. By setting the receiving groove 412 and the multiple limiting grooves 413, it can not only play the role of accommodating multiple wire harnesses 431 and limiting each bus 44, but also form a first protrusion structure 48 and a second protrusion structure 49 on the blister tray 41, which solves the problem of low structural strength of traditional hot-pressed blister parts due to their overly flat structure, so that the blister tray 41 can have sufficient structural strength to simultaneously support multiple wire harnesses 431 and multiple buses 44, thereby improving the reliability of the use of the collection device 4.

[0057] Please refer to the Figure 6 , Figure 7 , Fig. 9 and Fig.10 The bottom surface of the limiting groove 413 is provided with a through avoidance hole 414, which is used to avoid the mutual connection between the busbar 44 and the pole of the battery cell 11. Since the busbar 44 of this embodiment is connected to the poles of two battery cells 11 at the same time, the bottom surface of the limiting groove 413 is provided with two through avoidance holes 414. For details, please refer to Figure 8The busbar 44 includes two connecting bodies 441 and a bending portion 442 connected between the two connecting bodies 441. One of the avoidance holes 414 on the bottom surface of the limiting groove 413 is used to expose one of the connecting bodies 441, so that one of the connecting bodies 441 can be connected to the pole of one of the battery cells 11. Another avoidance hole 414 on the bottom surface of the limiting groove 413 is used to expose another connecting body 441, so that another connecting body 441 can be connected to the pole of another adjacent battery cell 11, so that the busbar 44 can connect two adjacent battery cells 11 in series or in parallel. By setting the bending portion 442 that can be bent and deformed, the relative position of the two connecting bodies 441 on the busbar 44 can be automatically changed as the two adjacent battery cells 11 expand, ensuring that when the battery cell 11 expands, the busbar 44 can still maintain a reliable connection relationship with the corresponding two battery cells 11, so as to further improve the reliability of the use of the collection device 4. In addition, the present embodiment further provides a recessed recessed portion 415 on the bottom surface of the limiting groove 413, and the recessed portion 415 is located between the two avoidance holes 414. In addition to being used to avoid the bending portion 442, the recessed portion 415 can also weaken the flatness of the blister tray 41, that is, the recessed portion 415 can further improve the structural strength of the blister tray 41 in the area supporting the bus 44, so that the blister tray 41 has more sufficient structural strength to support the metal and relatively heavy bus 44, thereby further improving the reliability of the use of the collection device 4.

[0058] Please also read Fig. 9 and Fig.11 The outer edge of the blister tray 41 facing the blister cover 42 is provided with a plurality of recessed plug holes 416, so that the outer edge of the blister tray 41 facing away from the blister cover 42 forms a plurality of raised reinforcing columns 417, and the plurality of reinforcing columns 417 on the outer edge can improve the structural strength of the outer circle of the blister tray 41. It is summarized here that by designing the blister tray 41 to have a recessed receiving groove 412, a plurality of recessed limiting grooves 413, a recessed portion 415 provided at the bottom of the limiting groove 413, and a plurality of reinforcing columns 417, the overall structure of the blister tray 41 will not be too flat, that is, the blister tray 41 has a very high structural strength even if it is relatively thin, so as to improve the stability of the blister tray 41 in supporting multiple wiring harnesses 431 and multiple bus bars 44 at the same time. Correspondingly, please refer to Fig.13The blister upper cover 42 is provided with a plurality of protruding plug-in posts 421, and each plug-in post 421 is plugged into a corresponding plug-in hole 416 of the blister tray 41 in an interference fit manner to achieve mutual fixation between the blister upper cover 42 and the blister tray 41. Similarly, the plurality of protruding plug-in posts 421 can increase the structural strength of the blister upper cover 42. If the shape of the blister upper cover 42 is relatively large, in order to further improve the structural strength of the blister upper cover 42, it can be as follows Figure 5 As shown, a raised rib structure 422 is provided on the blister cover 42, which avoids the disadvantage that the blister cover 42 is very soft after conventional hot pressing. The above-mentioned protective part 40 is provided on the blister cover 42. In addition, please refer to Figure 5 The blister upper cover 42 is provided with an upwardly protruding protective portion 423 in the area corresponding to the lower connector 46 . The protective portion 423 can cover the connector 46 , thereby providing insulation protection for the connector 46 .

[0059] Please also read Figure 7 and Fig.10 As a preferred embodiment, a post 418 may be protruded on the side wall of the limiting groove 413. By designing the post 418 to abut against the side of the bus 44, the bus 44 is more firmly fixed in the limiting groove 413. Secondly, a buckle portion 419 may be extended on the blister tray 41, and the buckle portion 419 extends to the top of the bus 44 to limit the bus 44 from detaching outward from the limiting groove 413, thereby ensuring the reliability of the bus 44 being limited in the limiting groove 413, thereby improving the reliability of the use of the collection device 4. In addition, a channel 410 may be designed between the receiving groove 412 and the limiting groove 413 to communicate with each other, so that the wire harness 431 connected to the bus 44 can be received in the receiving groove 412 by passing through the channel 410 from the limiting groove 413, thereby solving the problem that the wire harness 431 protrudes upward relative to the blister tray 41, so as to reduce the overall thickness of the collection device 4.

[0060] To sum up, the battery module of this solution has the advantages of simple structure, light weight, easy assembly difficulty, high energy density, low manufacturing cost, high safety and better electrical protection. Compared with the existing battery modules, the final cost can be reduced by about 50%, truly achieving the goal of reducing costs and increasing efficiency.

[0061] The above are only preferred embodiments of the present invention, and only specifically describe the technical principles of the present invention. These descriptions are only for explaining the principles of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations here, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention, and other specific implementations of the present invention that can be associated with by technicians in this field without creative labor, should be included in the scope of protection of the present invention.

Claims

1. A battery module, characterized in that: Comprising a battery body (1), a battery end plate (2) and a collection device (4), the battery body (1) comprising at least one battery cell (11), the battery end plate (2) comprising an end plate body (21), the end plate body (21) being arranged at an end of the battery body (1) and used to fix the battery body (1), the end plate body (21) being an injection molded part with a hollow structure; The collecting device (4) comprises a blister tray (41), a blister cover (42), a collecting component (43) and a plurality of bus bars (44); the blister tray (41) supports the collecting component (43) and the plurality of bus bars (44); the blister cover (42) is connected to the blister tray (41); the collecting component (43) and the plurality of bus bars (44) are located between the blister tray (41) and the blister cover (42); the bus bars (44) are electrically connected to the poles of the battery cells; the collecting components (43) are respectively electrically connected to the plurality of bus bars (44) and are led outwardly, so as to lead the poles of the battery cells (11) outwardly.

2. The battery module according to claim 1, characterized in that: The end plate body (21) has a first surface (216) arranged along the X direction, the first surface (216) has at least one binding groove (217) arranged along the Y direction, the binding groove (217) is used to embed and install at least part of the binding belt (3) for binding the battery body (1) and the end plate body (21), and at least one metal reinforcement (22) is also embedded in the end plate body (21) along the Z direction.

3. The battery module according to claim 2, characterized in that: The metal reinforcement member (22) has a hollow structure to form a through-hole (221), and a first connecting member (23) is inserted into the through-hole (221).

4. The battery module according to claim 1, characterized in that: An integrally-injected support member (214) is protruding from the top of the end plate body (21), the support member (214) comprising a support portion (2141) and a protruding portion (2142) arranged on the top surface of the support portion (2141); the protruding portions (2142) are respectively arranged at the edge of the support portion (2141) in pairs and protruding relative to each other; a second connecting member (215) is fixed to the support portion (2141); an output electrode (12) serving as a positive electrode or a negative electrode is led out from the battery body (1), and the output electrode (12) is fixed to the second connecting member (215).

5. The battery module according to claim 4, characterized in that: The second connecting member (215) comprises at least two main body parts (2152) arranged at intervals, and a connecting part (2153) is connected between two adjacent main body parts (2152), the outer shape of the main body part (2152) is larger than the outer shape of the connecting part (2153), the outer wall of the main body part (2152) in the circumferential direction is arranged as a tooth structure (2154), the support part (2141) is arranged with a mounting hole (2143), at least part of the second connecting member (215) is embedded in the mounting hole (2143), and the height of the second connecting member (215) protruding from the support part (2141) is less than the height of the protruding part (2142).

6. The battery module according to claim 1, characterized in that: The collection component (43) comprises a plurality of wire harnesses (431), each of the wire harnesses (431) being electrically connected to a corresponding bus bar (44) and led outwardly, the collection device further comprises a cable tie (45), the blister tray (41) being provided with at least one hole structure (411) for the cable tie (45) to pass through, the hole structure (411) comprising a first through hole (4111) and a second through hole (4112) passing through the blister tray (41), the cable tie (45) passing through the first through hole (4111) and passing through the second through hole (4112) and simultaneously binding the blister tray (41) and at least one of the wire harnesses (431).

7. The battery module according to claim 6, characterized in that: The blister tray (41) is provided with a recessed receiving groove (412) and a plurality of recessed limiting grooves (413) on one side facing the blister cover (42), so that a first protruding structure (48) corresponding to the receiving groove (412) and a plurality of second protruding structures (49) corresponding to the plurality of limiting grooves (413) are formed on the side of the blister tray (41) facing away from the blister cover (42). The plurality of wiring harnesses (431) are accommodated in the receiving groove (412). The busbar (44) is limited in a corresponding one of the limiting grooves (413), the hole structure (411) is arranged at the bottom of the receiving groove (412), and the first through hole (4111) and the second through hole (4112) both penetrate the bottom of the receiving groove (412), and a through avoidance hole (414) is arranged on the bottom surface of the limiting groove (413), and the avoidance hole (414) is used to avoid the busbar (44) and the pole of the battery cell (11) from being connected to each other.

8. The battery module according to claim 7, characterized in that: The busbar (44) comprises two connecting bodies (441) and a bending portion (442) connected between the two connecting bodies (441), wherein one connecting body (441) is used to connect a pole of one battery cell (11), and the other connecting body (441) is used to connect a pole of an adjacent battery cell (11); The bottom surface of the limiting groove (413) is provided with two through-holes (414), one of the avoiding holes (414) is used to avoid the connection between one of the connecting bodies (441) and a pole of one of the battery cells (11), and the other avoiding hole (414) is used to avoid the connection between the other connecting body (441) and a pole of an adjacent battery cell (11), and the bottom surface of the limiting groove (413) is provided with a concave recessed portion (415) at a position between the two avoiding holes (414), and the recessed portion (415) avoids the bending portion (442).

9. The battery module according to claim 7, characterized in that: The collection assembly (43) further comprises a connector (46) and a mounting plate (47); the mounting plate (47) is fixed to a side of the blister tray (41) facing the blister upper cover (42); the connector (46) and the mounting plate (47) are bonded and fixed; ends of a plurality of wire harnesses (431) are integrated into the connector (46); the blister tray (41) and the mounting plate (47) are fixed to each other via rivets; the blister tray (41) is provided with the first through hole (4111) and the second through hole (4112) in an area overlapping with the mounting plate (47); 12), the mounting plate (47) is provided with a third through hole (471) and a fourth through hole (472), the third through hole (471) is connected to the first through hole (4111), the fourth through hole (472) is connected to the second through hole (4112), the cable tie (45) is simultaneously passed through the first through hole (4111), the second through hole (4112), the third through hole (471) and the fourth through hole (472), and simultaneously binds the blister tray (41), the mounting plate (47) and the plurality of wire harnesses (431).

10. The battery module according to claim 1, characterized in that: The outer edge of the blister tray (41) facing the blister cover (42) is provided with a plurality of recessed plug holes (416), so that the outer edge of the blister tray (41) facing away from the blister cover (42) forms a plurality of raised reinforcing columns (417), and the blister cover (42) is provided with a plurality of plug columns (421), each of which is plugged into a corresponding one of the plug holes (416) in an interference fit manner.

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