WO2021217969A1

WO2021217969A1 - Battery module, battery assembly having same, and automobile

Info

Publication number: WO2021217969A1
Application number: PCT/CN2020/110881
Authority: WO
Inventors: 杨重科; 冯帅; 赵亮; 李成亮; 翁志福
Original assignee: 昆山宝创新能源科技有限公司
Priority date: 2020-04-30
Filing date: 2020-08-24
Publication date: 2021-11-04

Abstract

Disclosed are a battery module, a battery assembly having same, and an automobile. The battery module comprises a plurality of stacking bodies, a first connecting bar and a second connecting bar, wherein each stacking body comprises a plurality of stacked battery cells, positive electrode tab areas are formed at positive electrode tab ends of the battery cells, negative electrode tab areas are formed at negative electrode tab ends of the battery cells, and the positive electrode tab area of one of the two adjacent stacking bodies and the negative electrode tab area of the other stacking body are welded in a stacked manner to form a cascade welding area; a first slot is provided in the first connecting bar, and a positive electrode tab of the positive electrode tab area of the stacking body located at an end part penetrates the first slot to attach to the first connecting bar; and a second slot is provided in the second connecting bar, a negative electrode tab of the negative electrode tab area of the stacking body located at the end part penetrates the second slot to attach to the second connecting bar; one end, away from the stacking body, of one of the first connecting bar and the second connecting bar is provided with a connecting screw, and the other one of the first connecting bar and the second connecting bar is provided with a connecting hole.

Description

Battery module, battery module and automobile having the same

Priority information

This disclosure request was filed with the State Intellectual Property Office of China on April 30, 2020, with a patent application number of 202010368374.4, and an application title of "Battery Modules and Battery Modules and Automobiles with the same" and submitted to the Chinese State Intellectual Property Office on April 30, 2020. The priority of the Chinese patent application filed by the Intellectual Property Office with a patent application number of 202020714577.X and an application title of "battery module and battery module and automobile with the same", and the entire content of which is incorporated into the present disclosure by reference.

Technical field

The present disclosure belongs to the field of batteries, and specifically relates to a battery module, a battery module having the same, and an automobile.

Background technique

With the continuous popularization of new energy vehicles, the requirements for the use of power batteries in new energy vehicles have become higher and higher. In particular, users continue to increase their requirements for the continued mileage of new energy vehicles. Common new energy vehicles, as the power battery packs of new energy vehicles, are more than 1 meter in length or width; and currently on the market, the length of the battery module is generally about 0.3 meters, so in the power battery pack, Install at least 3 or even more battery modules.

Multiple battery modules are set up, and a fixed structure needs to be added to each battery module. At the same time, two adjacent battery modules need to be powered by external power connectors. As a result, there are many battery module installation structures, which not only increase the cost, but also increase the overall weight. At the same time, within the volume of a single module, the installation structure occupies a lot of internal space, causing the power battery module and the overall capacity of the battery pack to decrease, and the battery pack The more internal battery modules are installed, the more space is wasted. In addition, because multiple external power connectors need to be provided for power connection, internal resistance and cost increase, and internal consumption and cost of the power battery pack in use are increased.

Public content

The present disclosure aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an object of the present disclosure is to provide a battery module and a battery module with the same, and a car. The battery module eliminates the need for stacks of parallel connection accessory copper bars, thereby reducing the cost and weight of the module, and improving Space utilization.

In one aspect of the present disclosure, the present disclosure proposes a battery module. According to an embodiment of the present disclosure, the battery module includes:

A plurality of stacked bodies, the stacked body includes a plurality of stacked battery cells, and the positive electrode tab ends of the plurality of battery cores form a positive electrode tab area, and the negative electrode tab ends of the plurality of battery cores form a negative electrode In the tab region, the positive tab region of one stack and the negative tab region of the other stack in two adjacent stacked bodies are laminated and welded to form a cascade welding region;

The first connection row, the first connection row is provided with a first slot, and the positive electrode tab of the positive electrode tab area of the stack at the end passes through the first slot and is connected to the first Row fit

A second connection row, the second connection row is provided with a second slot, and the negative electrode tab of the negative electrode tab area of the stack at the end passes through the second slot and is connected to the second Row fit

Wherein, one of the first connecting row and the second connecting row is provided with a connecting screw at one end away from the stack, and the other of the first connecting row and the second connecting row is provided with a connecting screw. There are connecting holes.

According to the battery module of the embodiment of the present disclosure, a stack is formed by stacking a plurality of cells, and the positive pole tab end of the cell in the same stack forms a positive pole tab area, and the negative pole of the cell in the same stack The end of the ear forms a negative electrode tab area, and the positive electrode tab area of one of the two adjacent stacked bodies is welded to the negative electrode tab area of the other stacked body to form a cascade welding area, and at the same time, the connection bar is used to connect at the end. The positive electrode tab of the positive electrode tab area and/or the negative electrode tab of the negative electrode tab area of the stacked body, compared with the existing battery module in which two adjacent stacked bodies are connected in series by copper bars, the battery of the present application The module omits the copper bars of the connection accessories connected in series with the stacked body, thereby reducing the cost and weight of the module, and improving the space utilization rate. In addition, in the present application, one end of the first connection row and the second connection row is far away from the stack body. Connecting screws are provided, and the other of the first connecting row and the second connecting row is provided with connecting holes. When connecting two battery modules in series, only the connecting screw on one battery module needs to be connected with the other battery module The hole fit can realize the series connection of two battery modules, further reducing the use of connection accessories.

In addition, the battery module according to the above-mentioned embodiments of the present disclosure may also have the following additional technical features:

In some embodiments of the present disclosure, a first structural hole is provided on the positive electrode tab located in the cascade welding area, and a second structural hole is provided on the negative electrode tab located in the cascade welding area , The positive electrode tab area is provided with a plurality of first through channels formed by the first structure holes, and the negative electrode tab area is provided with a plurality of second through channels formed by the second structure holes, and the In the cascade welding zone, the first through channel and the second through channel pass through to form an auxiliary connection channel, and an auxiliary connection member is provided in the auxiliary connection channel. As a result, the reliability of the internal connection of the battery module can be improved.

In some embodiments of the present disclosure, the above-mentioned battery module further includes: a first tab protection shell, the first tab protection shell is respectively clamped with the upper end and the lower end of the cascade welding zone, and the first tab A first through hole and a first groove are arranged on the tab protection shell, and a first threaded hole is arranged in the first groove. Therefore, on the one hand, the tab protection area is protected, and on the other hand, it is convenient for the subsequent rapid positioning and assembly of the side plate.

In some embodiments of the present disclosure, the above-mentioned battery module further includes: a second tab protective shell, and the second tab protective shell is connected to the positive pole tab area or the negative pole of the stack at the end. The tab area is clamped, and the second tab protection shell is provided with a second through hole and a second groove, and a second threaded hole is provided in the second groove. Therefore, on the one hand, the positive electrode tab area is protected, and on the other hand, it is convenient for the subsequent rapid positioning and assembly of the side plate.

In some embodiments of the present disclosure, the above-mentioned battery module further includes: a first side plate and a second side plate, the first side plate and the second side plate are respectively provided at the battery module along the length direction of the battery module. On the two side walls of the stack, and the first side plate and the second side plate corresponding to the first groove and the second groove position respectively inwardly protrude to form a first convex portion and a first convex portion Two convex parts, the first convex part is fitted into the first groove, the first convex part is provided with a first connecting hole matching the first threaded hole, the second convex part Is fitted into the second groove, the second convex portion is provided with a second connecting hole matching the second threaded hole, and the first side plate and the second side plate correspond to each other The positions of the first through hole and the second through hole respectively form a first opening and a second opening; an isolation plate is provided on the upper end of the stack along the length direction of the battery module and Lower end; a first connecting piece, the first connecting piece passes through the first connecting hole to match the first threaded hole; a second connecting piece, the second connecting piece passes through the second connecting hole and The second threaded hole matches. As a result, quick assembly of the side plate can be realized, and the reliability of the battery module can be improved at the same time.

In some embodiments of the present disclosure, concave and convex reinforcing ribs are provided on the first side plate and/or the second side plate. As a result, the expansion force of the cells in the module can be effectively resisted.

In some embodiments of the present disclosure, a buffer plate is provided between the first side plate and the stack and/or between the second side plate and the stack. As a result, it can protect the battery cell.

In some embodiments of the present disclosure, between two adjacent cells, between the stack and the buffer plate, and between the buffer plate and the first side wall and the second side, respectively Structural glue is arranged between the boards. As a result, the reliability of the battery module can be improved.

In another aspect of the present disclosure, the present disclosure proposes a battery module. According to an embodiment of the present disclosure, the battery module includes:

A plurality of the above-mentioned battery modules;

A first baffle and a second baffle, the first baffle and the second baffle are opposite and spaced apart, and the plurality of battery modules are provided on the first baffle and the second baffle In between, the first baffle and the second baffle are respectively provided with a third opening and a fourth opening at positions corresponding to the first opening and the second opening;

A third connecting member, the third connecting member passing through the third opening, the first opening and the first through hole;

The fourth connecting member passes through the fourth opening, the second opening and the second through hole.

According to the battery module of the embodiment of the present disclosure, a third opening and a fourth opening are respectively provided on the first baffle and the second baffle at positions corresponding to the first opening and the second opening on the battery module, Then, a third connecting member is set to pass through the third opening, the first opening and the first through hole, and a fourth connecting member is set to pass through the fourth opening, the second opening, and the second through hole. To realize the fixation of multiple battery modules, compared with the prior art that requires peripheral power connectors to be provided between two adjacent battery modules for power connection, that is, multiple battery modules need to be connected by multiple power connectors. There is no need to provide a power connector between two adjacent battery modules in the battery module of the application. Instead, only the third connector and the fourth connector can be used to realize the connection of multiple battery modules, which not only reduces the use of connectors It also reduces the cost and weight of the battery module, saves installation space, does not need to consider the connection stability and reliability of the power connector, and reduces the internal resistance of the connection, thereby reducing the internal consumption of the battery module, thereby making the installation of the battery Modular cars have excellent mileage.

In the third aspect of the present disclosure, the present disclosure proposes an automobile. According to an embodiment of the present disclosure, the automobile has the above-mentioned battery module. As a result, the car has excellent mileage.

The additional aspects and advantages of the present disclosure will be partially given in the following description, and some will become obvious from the following description, or be understood through the practice of the present disclosure.

Description of the drawings

The above and/or additional aspects and advantages of the present disclosure will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, in which:

Fig. 1 is a schematic structural diagram of a battery cell in a battery module according to an embodiment of the present disclosure;

Fig. 2 is a schematic structural diagram of a stack in a battery module according to an embodiment of the present disclosure;

Fig. 3 is a partial structural diagram of a battery module according to an embodiment of the present disclosure;

4 is a schematic structural diagram of a stacked body in a battery module according to another embodiment of the present disclosure;

FIG. 5 is a schematic diagram of a partial structure of a battery module according to another embodiment of the present disclosure;

Fig. 6 is a schematic structural diagram of one end of a battery module according to an embodiment of the present disclosure;

FIG. 7 is a schematic diagram of another end structure of a battery module according to another embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of an upper first connection row of a battery module according to an embodiment of the present disclosure;

Fig. 9 is a schematic structural diagram of an upper second connection row of a battery module according to an embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram of a battery module according to another embodiment of the present disclosure;

FIG. 11 is a schematic structural diagram of a first tab protective shell in a battery module according to an embodiment of the present disclosure;

FIG. 12 is a schematic structural diagram of a battery module according to another embodiment of the present disclosure;

FIG. 13 is a schematic structural diagram of a battery module according to an embodiment of the present disclosure.

Public detailed description

The embodiments of the present disclosure are described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary, and are intended to explain the present disclosure, but should not be construed as limiting the present disclosure.

In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" , "Radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying the pointed device or The element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure.

In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present disclosure, unless otherwise clearly defined and defined, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection. , Or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, it can be the internal connection of two components or the interaction relationship between two components, unless otherwise specified The limit. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present disclosure can be understood according to specific circumstances.

In the present disclosure, unless otherwise clearly defined and defined, the first feature “on” or “under” the second feature may be in direct contact with the first and second features, or the first and second features may be indirectly through an intermediary. touch. Moreover, the "above", "above" and "above" of the first feature on the second feature may mean that the first feature is directly above or diagonally above the second feature, or it simply means that the level of the first feature is higher than the second feature. The “below”, “below” and “below” of the second feature of the first feature may be that the first feature is directly below or obliquely below the second feature, or it simply means that the level of the first feature is smaller than the second feature.

In the first aspect of the present disclosure, the present disclosure proposes a battery module. According to an embodiment of the present disclosure, referring to FIGS. 1-12, the battery module 100 includes a plurality of stacked bodies 1, a first connection row 2, and a second connection row 3.

Wherein, the stacked body 1 includes a plurality of stacked cells 10, and preferably, the plurality of cells 10 are laminated by bonding with a structural glue (not shown). 1, the positive terminal of the battery core 10 forms a positive electrode tab 101, the negative terminal of the battery core 10 forms a negative terminal tab 102, and the positive terminal 101 is made of aluminum or aluminum alloy, and the negative terminal 102 is made of copper or copper alloy. , The shell of the battery core 10 is aluminum plastic. And referring to FIG. 2, the ends of the positive electrode tabs 101 of the multiple cells 10 in the same stack 1 form the positive electrode tab region 11, and the ends of the negative electrode tabs 102 of the multiple cells 10 in the same stack 1 form the negative electrode. For the tab region 11, referring to FIG. 3, the positive tab region 11 of one stack 1 and the negative tab region 12 of the other stack 1 are welded to form a cascade welding region 13. Therefore, compared with the conventional battery module in which two adjacent stacked bodies are connected in series using copper bars, the battery module of the present application omits the copper bars connected in series with the stacked bodies, thereby reducing the cost and cost of the module. Weight improves space utilization. Specifically, the positive electrode tab region 11 of one stack body 1 and the negative electrode tab region 12 of the other stack body 1 of the two adjacent stacked bodies 1 are laminated and welded mainly by laser welding, and then ultrasonic welding is used for auxiliary connection.

Further, when two adjacent stacked bodies 1 are cascade welded, the positive electrode tabs 101 of the multiple cells 10 in the stacked body 1 are bent according to the structure shown in FIG. 3, and the ends of the bent positive tabs 101 The positive electrode tab area 11 is formed by stacking, and the negative electrode tabs 102 of the multiple cells 10 in the stack 1 are also bent according to the structure shown in FIG. 4, a first structural hole 1011 is provided on the positive electrode tab 101 of the cascade welding zone 13, a second structural hole 1021 is provided on the negative electrode tab 102 of the cascade welding zone 13, and the positive electrode tab region 11 A first through channel 103 formed by a plurality of first structural holes 1011 is provided, and a second through channel 104 formed by a plurality of second structural holes 102 is provided in the negative electrode tab region 12, and referring to FIG. 5, in the cascade welding zone 13 , The first through channel 103 on one stack 1 of the two adjacent stacked bodies 1 and the second through channel 104 on the other stack 1 penetrate to form an auxiliary connection channel 105, and the auxiliary connection channel 105 is provided with an auxiliary connection Pieces (not shown). Specifically, by providing a first structural hole 1011 on the positive electrode tab 101 of the cascade welding zone 13, and a second structural hole 1021 on the negative electrode tab 102 of the cascade welding zone 13, when the cascade welding is performed, the same When the ends of the positive electrode tab 101 and the negative electrode tab 102 of the plurality of battery cells 10 are stacked in a stack 1, a plurality of first structure holes 1011 are overlapped to form a first through channel 103, and a plurality of second structure holes 1011 are overlapped The second through channel 104 is formed to facilitate rapid positioning when the positive electrode tab 101 and the negative electrode tab 102 are stacked. At the same time, the positive electrode tab region 11 of one stack body 1 and the other stack body in two adjacent stacked bodies 1 When the negative electrode tab area 12 of 1 is laminated and welded to form the cascade welding zone 13, the first through channel 103 and the second through channel 104 are superimposed to form an auxiliary connecting channel 105, thereby facilitating the formation of the cascade welding zone 13 by two adjacent stacked bodies 1 The rapid positioning at the time, and the provision of auxiliary connectors in the auxiliary connection channels 105 of the cascade welding zone 13 can improve the reliable connection of the two adjacent stacked bodies 1. It should be noted that those skilled in the art can select the specific type of the auxiliary connecting member according to actual needs, as long as the reliable connection of two adjacent stacked bodies 1 can be achieved. For example, the auxiliary connecting member may be a riveting member or a bolt, etc. .

Further, referring to Figures 6 and 7, the first connecting row 2 is provided with a first slot 21, and the positive electrode tab 101 of the positive electrode tab region 11 of the stack 1 at the end passes through the first slot 21 and the first slot 21. A connecting row 2 is attached, the second connecting row 3 is provided with a second slot 31, and the negative electrode tab 102 of the negative electrode tab area 12 of the stack 1 at the end passes through the second slot 31 and is connected to the second Row 3 fits. Preferably, the first slot 21 on the first connection row 2 is parallel to the cell 10 of the stack 1 at the end, and the first slot 21 on the first connection row 2 corresponds to the number of the cells 10 one-to-one. That is, one positive electrode tab 101 corresponds to a first slot 21, so that the positive electrode tab 101 of the stack at the end is passed through a first slot 21 and then attached to the first connecting row 2 to realize the end The positive electrode tabs 101 of the stacked cells 10 in the stack 1 are connected in parallel, and the second slot 31 on the second connection row 3 is parallel to the cells 10 of the stack 1 at the end, and the second connection row 3 is The second slot 31 corresponds to the number of the battery 10, that is, one negative electrode tab 102 corresponds to one second slot 31, so that the negative electrode tab 101 of the stack at the end passes through the second slot. After 31 and the second connection row 3 are attached to realize the parallel connection of the negative electrode tabs 102 of the stacked cells 10 in the end stack 1, and the positive electrode tab 101 of the end stack 1 and the first connection row 2 After bonding, laser welding is performed to improve the reliability of the positive electrode tab 101. At the same time, the negative electrode tab 102 of the end stack 1 and the second connecting row 3 are bonded together and then laser welded to improve the connection of the negative electrode tab 102. Reliability, in addition, one of the first connecting row 2 and the second connecting row 3 is provided with a connecting screw 22 at one end away from the stack 1, and the other of the first connecting row 2 and the second connecting row 3 is provided with Connecting holes 32, and the connecting screws 22 correspond to the connecting holes 32 one-to-one, that is, when connecting two battery modules 100 in series, only the connecting screw 22 on one battery module 100 needs to be matched with the connecting hole 32 on the other battery module 100 The series connection of the two battery modules 100 can be realized, and the use of connection accessories can be further reduced. For example, referring to FIGS. 8 and 9, the first connecting row 2 is provided with connecting screws 22, and the second connecting row 3 is provided with connecting holes 32. And those skilled in the art can select the number of connecting screws 22 and connecting holes 32 on the first connecting row 2 and the second connecting row according to actual needs, as long as the reliable connection of two adjacent battery modules 100 can be achieved, for example, Two connecting screws 22 are provided on the first connecting row 2 or the second connecting row 3, and the two connecting screws 22 are arranged symmetrically on the first connecting row 2 or the second connecting row 3.

Further, referring to FIG. 10, the above-mentioned battery module 100 further includes a first tab protection shell 14 and a second tab protection shell 15, wherein the first tab protection shell 14 is respectively clamped to the upper end and the lower end of the cascade welding zone 13 , That is, two first tab protection shells 14 are provided at the cascade welding area 13, and the two first tab protection shells 14 are respectively clamped to the cascade tab area 13 from the upper and lower ends of the battery module 100, and refer to 11, the first tab protection shell 14 is provided with a first through hole 141 and a first groove 142, and the first groove 142 is provided with a first threaded hole 1421, refer to FIG. 6, the second tab protection shell 15 It is clamped with the positive electrode tab area 11 or the negative electrode tab area 12 of the stack 1 at the end, and the second tab protective shell 15 is provided with a second through hole 151 and a second groove 152, and the second groove A second threaded hole 1521 is provided in the 152. It should be noted that those skilled in the art can select the number of the first through hole 141, the first groove 142, the second through hole 151, and the second groove 152 according to actual needs. Preferably, the first tab protection The housing 14 is provided with a first through hole 141 and a first groove 142, and the second tab protection housing 15 is provided with two second through holes 151 and two second grooves 152, and two second through holes 151 are arranged symmetrically, and the two second grooves 152 are also arranged symmetrically. At the same time, the first groove 142 and the second groove 152 are both circular grooves, which serve as a guide for subsequent side plate installation and realize rapid assembly. Specifically, the first tab protection shell 14 and the second tab protection shell 15 are both insulating and flame-retardant plastics, such as PP, APS, PC, PA, PA66 and other materials.

Further, referring to FIG. 12, the above-mentioned battery module further includes a first side plate 16, a second side plate 17, an isolation plate 18, a first connector (not shown), and a second connector (not shown).

12, the first side plate 16 and the second side plate 17 are respectively provided on the two side walls of the stack 1 along the length direction of the battery module 100, and the first side plate 16 and the second side plate 17 correspond to each other. The positions of the first groove 142 and the second groove 152 respectively form a first convex portion 162 and a second convex portion 172, that is, the positions on the first side plate 16 and the second side plate 17 corresponding to the first groove 142 A first convex portion 162 is formed, and a second convex portion 172 is formed on the first side plate 16 and the second side plate 17 corresponding to the position of the second groove 152, and the first convex portion 162 is fitted into the first groove 142 The first protrusion 162 is provided with a first connecting hole 1621 matching the first threaded hole 1421, the second protrusion 172 is fitted in the second groove 152, and the second protrusion 172 is provided with a second The threaded hole 1521 is matched with the second connecting hole 1721, so that when the first side plate 16 and the second side plate 17 are arranged on the two side walls of the stack 1, only the first protrusion 162 and the first groove 142 need to be matched. And the second protrusion 172 and the second groove 152 can cooperate to realize the quick assembly of the first side plate 16 and the second side plate 17, and the first side plate 16 and the second side plate 17 correspond to the first through hole 141 And the second through hole 151 respectively form a first opening 161 and a second opening 171, that is, the first side plate 16 and the second side plate 17 corresponding to the first through hole 141 are both formed with the first opening 161 A second opening 171 is formed on the first side plate 16 and the second side plate 17 at positions corresponding to the second through holes 151.

12, the isolation plate 18 is provided on the upper and lower ends of the stack 1 along the length direction of the battery module 100, the first connecting member passes through the first connecting hole 1621 to match the first threaded hole 1421, and the second connecting member passes through the first threaded hole 1421. The two connecting holes 1721 are matched with the second threaded holes 1521 so as to realize the reliable installation of the first side plate 16 and the second side plate 17. Preferably, the first side plate 16 and/or the second side plate 17 are provided with concave-convex reinforcing ribs (not shown), so as to effectively resist the expansion force of the battery core in the module, and the first connecting piece and the second connecting piece All are bolts. Specifically, the first side plate 16 and the second side plate 17 are made of metal or plastic. The metal is aluminum, aluminum, copper, iron and their alloy materials. The metal can be formed by stamping, and the plastic is a thermosetting plastic, such as SMC, which has Higher strength, thermosetting materials can be molded by injection molding.

Further, referring to FIG. 12, a buffer plate 19 is provided between the first side plate 16 and the stack 1 and/or between the second side plate 17 and the stack 1, which is used to provide fixed electricity when the stack 1 is initially assembled. The pre-tightening force of the core 10 and the absorption of the expansion force of the cell 10 at the end of use. It should be noted that those skilled in the art can select the material of the buffer plate 21 according to actual needs, for example, it can be an insulating, flame-retardant plastic, such as PP, APS, PC, PA, PA66 and other materials. At the same time, structural glue is provided between the stack 1 and the buffer plate 21, and between the buffer plate 21 and the first side wall 16 and the second side plate 17, respectively, so as to improve the reliability of the battery module.

According to the battery module of the embodiment of the present disclosure, a stack is formed by stacking a plurality of cells, and the positive pole tab end of the cell in the same stack forms a positive pole tab area, and the negative pole of the cell in the same stack The end of the ear forms a negative electrode tab area, and the positive electrode tab area of one of the two adjacent stacked bodies is welded to the negative electrode tab area of the other stacked body to form a cascade welding area, and at the same time, the connection bar is used to connect at the end. The positive electrode tab of the positive electrode tab area and/or the negative electrode tab of the negative electrode tab area of the stacked body, compared with the existing battery module in which two adjacent stacked bodies are connected in series by copper bars, the battery of the present application The module omits the copper bars of the connection accessories connected in series with the stacked body, thereby reducing the cost and weight of the module, and improving the space utilization rate. In addition, in the present application, one end of the first connection row and the second connection row is far away from the stack body. Connecting screws are provided, and the other of the first connecting row and the second connecting row is provided with connecting holes. When connecting two battery modules in series, only the connecting screw on one battery module needs to be connected with the other battery module Hole matching can realize the series connection of two battery modules, further reducing the use of connection accessories

In another aspect of the present disclosure, the present disclosure proposes a battery module. According to an embodiment of the present disclosure, referring to FIG. 13, the battery module includes: a battery module 100, a first baffle 200, a second baffle 300, a third connection member 400, and a fourth connection member 500.

Wherein, referring to FIG. 13, the battery module includes a plurality of the above-mentioned battery modules 100 that omits the parallel connection of the battery cells and the parallel connection of the stacked body and the copper bar of the accessory. The plurality of battery modules 100 are arranged in sequence, and the plurality of battery modules 100 The first openings 161 of the battery modules pass through, and the second openings 171 of the plurality of battery modules 100 pass through.

Referring to FIG. 13, the first baffle 200 and the second baffle 300 are arranged oppositely and spaced apart, a plurality of battery modules 100 are arranged between the first baffle 200 and the second baffle 300, and the first baffle 200 and the second baffle The board 300 is provided with a third opening 201 and a fourth opening 301 at positions corresponding to the first opening 161 and the second opening 171, that is, the first baffle 200 and the second baffle 300 correspond to the first opening The positions of 161 are all provided with a third opening 201, and the positions of the first baffle 200 and the second baffle 300 corresponding to the second opening 171 are provided with a fourth opening 301.

Wherein, the third connecting member 400 passes through the third opening 201, the first opening 161 and the first through hole 141, and the fourth connecting member 500 passes through the fourth opening 301, the second opening 171 and the second through hole. 151, so that the third connecting member 400 and the fourth connecting member 500 can be used to realize the fixation of a plurality of battery modules 100. Preferably, the third connecting member 400 and the fourth connecting member 500 each include a bolt 51 and a nut 52, and the first baffle 200 is close to the first side plates 16 of the plurality of battery modules 100, and the second baffle 300 is close to the plurality of batteries. Take the second side plate 17 of the module 100 as an example. The bolts 51 pass through the third opening 201 on the first baffle 200, the first opening 161 on the first side plate 16, and the first tab protection shell 14. The first through hole 141 on the second side plate 17 and the third hole 201 on the second baffle 300, and the nut 52 is provided on the second baffle 300 away from the first baffle 200 The bolt 51 passes through the fourth opening 301 on the first baffle 200, the second opening 171 on the first side plate 16, and the second lug protection shell 15 The second through hole 151, the second opening 171 on the second side plate 17 and the fourth opening 301 on the second baffle 300, and the nut 52 is provided on the second baffle 300 away from the first baffle 200 One side is locked in conjunction with the bolt 51.

Compared with the prior art that requires peripheral power connectors to be provided between two adjacent battery modules for power connection, that is, multiple battery modules need to be connected by multiple power connectors, and the battery modules of the present application are adjacent to each other. There is no need to provide a power connector between the two battery modules. Instead, only the third connector and the fourth connector can be used to realize the connection of multiple battery modules, which not only reduces the use of connectors, but also reduces the battery module’s cost. Cost and weight, saving installation space, without considering the connection stability and reliability of the power connector, reducing the internal resistance of the connection, thereby reducing the internal consumption of the battery module, and making the car installed with the battery module have excellent battery life Hour mileage. It should be noted that the features and advantages described above for the battery module are also applicable to the battery module, and will not be repeated here.

In the third aspect of the present disclosure, the present disclosure proposes an automobile. According to an embodiment of the present disclosure, the automobile has the above-mentioned battery module. Preferably, the car is a new energy car. As a result, the car has excellent mileage. It should be noted that the features and advantages described above for the battery module are also applicable to the car, and will not be repeated here.

In the description of this specification, descriptions with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean specific features described in conjunction with the embodiment or example , Structures, materials, or characteristics are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples and the features of the different embodiments or examples described in this specification without contradicting each other.

Although the embodiments of the present disclosure have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and should not be construed as limiting the present disclosure. A person of ordinary skill in the art can comment on the foregoing within the scope of the present disclosure. The embodiment undergoes changes, modifications, substitutions, and modifications.

Claims

A battery module, which includes:

A plurality of stacked bodies, the stacked body includes a plurality of stacked battery cells, and the positive electrode tab ends of the plurality of battery cores form a positive electrode tab area, and the negative electrode tab ends of the plurality of battery cores form a negative electrode In the tab region, the positive tab region of one stack and the negative tab region of the other stack in two adjacent stacked bodies are laminated and welded to form a cascade welding region;

The first connection row, the first connection row is provided with a first slot, and the positive electrode tab of the positive electrode tab area of the stack at the end passes through the first slot and is connected to the first Row fit

A second connection row, the second connection row is provided with a second slot, and the negative electrode tab of the negative electrode tab area of the stack at the end passes through the second slot and is connected to the second Row fit,

Wherein, one of the first connecting row and the second connecting row is provided with a connecting screw at one end away from the stack, and the other of the first connecting row and the second connecting row is provided with a connecting screw. There are connecting holes.
The battery module according to claim 1, wherein a first structural hole is provided on the positive electrode tab located in the cascade welding area, and a first structural hole is provided on the negative electrode tab located in the cascade welding area. Two structural holes, the positive electrode tab area is provided with a plurality of first through channels formed by the first structural holes, and the negative electrode tab area is provided with a plurality of second through channels formed by the second structural holes, And in the cascade welding zone, the first through channel and the second through channel pass through to form an auxiliary connection channel, and an auxiliary connection member is provided in the auxiliary connection channel.
The battery module according to claim 1 or 2, further comprising: a first tab protection shell, the first tab protection shell is respectively clamped with the upper end and the lower end of the cascade welding zone, and the The first tab protective shell is provided with a first through hole and a first groove, and a first threaded hole is provided in the first groove.
The battery module according to any one of claims 1-3, further comprising: a second tab protective shell, the second tab protective shell and the positive electrode of the stack at the end The lug area or the negative electrode lug area is clamped, and the second lug protective shell is provided with a second through hole and a second groove, and a second threaded hole is provided in the second groove.
The battery module according to any one of claims 1 to 4, further comprising:

A first side plate and a second side plate, the first side plate and the second side plate are respectively provided on both side walls of the stack along the length direction of the battery module, and the first side The positions of the plate and the second side plate corresponding to the first groove and the second groove respectively form a first convex portion and a second convex portion, and the first convex portion is fitted into the In the first groove, the first protrusion is provided with a first connecting hole matching the first threaded hole, the second protrusion is fitted into the second groove, and the second protrusion is The convex portion is provided with a second connecting hole matching the second threaded hole, and the positions of the first side plate and the second side plate corresponding to the first through hole and the second through hole are respectively Forming a first opening and a second opening;

Separating plates, the isolating plates are provided at the upper end and the lower end of the stack along the length direction of the battery module;

A first connecting piece, the first connecting piece passes through the first connecting hole to match the first threaded hole;

The second connecting member passes through the second connecting hole to match the second threaded hole.
The battery module according to any one of claims 1 to 5, wherein the first side plate and/or the second side plate are provided with concave-convex reinforcing ribs.
The battery module according to any one of claims 1-6, wherein a buffer is provided between the first side plate and the stacked body and/or between the second side plate and the stacked body. plate.
The battery module according to any one of claims 1-7, wherein between two adjacent cells, between the stack and the buffer board, and the buffer board is connected to the first A structural glue is arranged between a side wall and the second side plate.
A battery module, which includes:

A plurality of battery modules according to any one of claims 1-8;

A first baffle and a second baffle, the first baffle and the second baffle are opposite and spaced apart, and the plurality of battery modules are provided on the first baffle and the second baffle In between, the first baffle and the second baffle are respectively provided with a third opening and a fourth opening at positions corresponding to the first opening and the second opening;

A third connecting member, the third connecting member passing through the third opening, the first opening and the first through hole;

The fourth connecting member passes through the fourth opening, the second opening and the second through hole.
An automobile, wherein the automobile has the battery module according to claim 9.