CN207664085U - A kind of battery modules - Google Patents

Abstract

Disclosed is a battery module, comprising: a soft pack cell structure, including a plurality of brackets and a plurality of cells mounted on the plurality of brackets, the plurality of brackets are arranged and distributed, and the edges of the plurality of brackets are provided with corresponding first Groove; the shell, including a shell surrounded by four sides, forms a space for accommodating the structure of the soft-packed electric core, and the inner side of the shell is provided with raised lines extending to both ends of the shell, and the raised line is adapted to the first groove, so that the soft Pack battery structure limit. The casing also includes: fins located outside the casing. The shell also includes: a first end plate, located at the front end of the shell; a second end plate, at the rear end of the shell, forming a closed chamber with the shell and the first end plate. Among them, the convex line on the inner wall of the casing is adapted to the first groove of the bracket in the structure of the soft-packed battery cell, and the cooling fins on the outer wall of the casing not only make the position of the battery cell inside the casing stable, but also can speed up the charging of multiple batteries. Core heat dissipation.

Description

A battery module

technical field

The utility model relates to the field of batteries, in particular to a battery module.

Background technique

Energy shortage and environmental pollution are two major challenges facing the development of the world's automobile industry today, so it is imperative to carry out research on new energy vehicles. With the gradual development and utilization of clean energy such as solar energy, wind energy, geothermal energy, tidal energy and nuclear energy, the development of electric vehicles has become one of the main directions for the development of the automobile industry in recent years. The development of electric vehicles has laid a certain foundation. Pure electric vehicles have been widely favored by all walks of life, and the development of electric vehicles is largely restricted by the maturity of three major technologies: battery cell technology, battery management system, and motor drive control system. . As a key component of electric vehicles, power batteries have a major impact on the power, economy and safety of the vehicle. The safety performance of the battery system is particularly important. At the same time, the power battery thermal management system is responsible for monitoring and adjusting the temperature of the battery cells to improve safety performance and service life.

In the prior art, the insulation treatment of the positive and negative lugs of the soft-packed battery cell of the pure electric vehicle power battery system is simple, and the insulation tape is used for protection, which is easy to age and fall off, and there is a risk. The heat dissipation of the battery system uses a heat conduction pad, which has problems such as poor contact and high thermal resistance, the heat dissipation effect is not obvious, and the cost is high. During the process of charging and high-rate discharge, the battery will generate a lot of heat, which not only affects the performance of the battery, but also tends to cause thermal runaway under continuous high temperature, which seriously affects the life of the battery. In addition, the shell of the battery system is generally welded or stamped by sheet metal, and the material is relatively large, resulting in low energy density of the power battery, low thermal conductivity of the material, slow heat dissipation, and high processing costs; at the same time, the location of the battery cells inside the shell is not stable, thus affecting the performance of the battery.

Utility model content

The problem to be solved by the utility model is to provide a battery module. The convex line on the inner wall of the housing is adapted to the first groove of the bracket in the structure of the soft battery cell, and the outer wall of the housing has cooling fins, which not only This makes the battery module stable and can speed up the heat dissipation of multiple batteries.

According to a battery module provided by the present invention, it includes: a soft package cell structure, including a plurality of brackets and a plurality of cells installed on the plurality of brackets, the plurality of brackets are arranged and distributed, and the Corresponding first grooves are provided on the edges of a plurality of brackets; the casing includes a casing surrounded by four sides to form a space for accommodating the structure of the soft-packed battery, and the inside of the casing is provided with a groove extending toward both ends of the casing. The protruding line is adapted to the first groove, so that the structure of the pouch cell is limited.

Preferably, the housing further includes: fins located outside the housing.

Preferably, the housing further includes: a first end plate, located at the front end of the housing; a second end plate, located at the rear end of the housing, forming a closed chamber with the housing and the first end plate; A ring is located at the connection position between the housing and the first end plate and the housing and the second end plate, so that the chamber is sealed.

Preferably, the housing further includes: a battery management unit located at the front end of the housing and adjacent to the front end of the pouch cell structure; a soft busbar connecting the battery management unit and the pouch cell structure For electrical connection, the first end plate includes: an oil filling port; and a connector, located outside the first end plate, electrically connected to the battery management system.

Preferably, the connector includes: at least one of a positive connector, a negative connector, an input connector, and an output connector.

Preferably, the soft pack cell structure further includes: a third end plate, located at both ends of the plurality of brackets, including a second groove located on the edge of the third end plate, the second groove and the second groove The heat conduction sheet is located between the plurality of electric cores and separates the plurality of electric cores from each other; the insulating plate is located between the tabs of the multiple electric cores and the shell.

Preferably, the structure of the soft-packed battery cell further includes: a connector, electrically connecting the tabs of the plurality of battery cells to the soft busbar; a fixing plate, located between the tabs of the plurality of battery cells and the soft busbar; between the connectors; spring washers, located between the connectors and the insulating board.

Preferably, the connecting piece, the fixing plate, and the spring pad are fixedly connected to the plurality of brackets.

Preferably, the plurality of brackets and the third end plate are fixedly connected so that the positions of the plurality of electric cores are fixed.

Preferably, the shell is made of aluminum alloy, and the aluminum alloy die-casting molding process is adopted; the plurality of brackets are made of plastic.

According to the battery module of the present invention, the protruding strip located on the inner wall of the casing is adapted to the first groove located on the bracket in the pouch cell structure and the second groove on the third end plate, so that the pouch battery The core structure can be fixed in the casing, so that the pouch cell structure is fixed inside the casing to ensure the performance of the battery module; at the same time, the outer wall of the casing is provided with fins to accelerate the heat dissipation of the pouch cell structure. At the same time, the shell is made of aluminum. Since aluminum is a material with high thermal conductivity and high heat dissipation, it can ensure that the structure of the soft-packed battery cell is fixed in the shell, so that the structure of the battery module is stable, and it can further speed up the operation of the soft-packed battery cell. The heat dissipation of the structure, thus guaranteeing its performance.

Multiple batteries are separated by multiple spaces made of plastic, which can effectively prevent the deviation of the installation dimensions caused by the swelling of the batteries, so as to strictly control the tolerance. At the same time, the heat conduction sheets are separated between multiple cells, which can timely export the heat generated by the pouch cell structure, and prevent the thermal runaway phenomenon caused by the accumulation of more heat in the middle part of the pouch cell structure.

There are insulating plates on the left and right sides of the soft-packed battery structure to separate the battery tabs of the soft-packed battery structure from the shell. The insulating plate not only has good insulation performance, but also has a simple manufacturing process, light specific gravity, and low cost.

Description of drawings

Through the following description of the embodiments of the present invention with reference to the accompanying drawings, the above and other objects, features and advantages of the present invention will be more clear.

Fig. 1 shows a perspective view of a battery module according to the present invention;

Fig. 2 shows a three-dimensional exploded view of the shell of the battery module according to the present invention;

Fig. 3 shows a perspective view of the shell of the battery module according to the present invention;

Fig. 4 shows a perspective view of the first end plate in the battery module according to the present invention;

Fig. 5 shows a perspective view of the second end plate in the battery module according to the present invention;

Fig. 6 shows a perspective view of the structure of the pouch cell according to the present utility model;

Fig. 7 shows a three-dimensional exploded view of the soft-pack battery structure according to the present invention;

Fig. 8 shows a perspective view of a plurality of brackets in the pouch cell structure according to the present invention;

Fig. 9 shows a perspective view of the third end plate in the pouch cell structure according to the present invention.

Detailed ways

The utility model will be described in more detail below with reference to the accompanying drawings. In the various figures, identical elements are indicated with similar reference numerals. For the sake of clarity, various parts in the drawings have not been drawn to scale. Also, some well-known parts may not be shown in the drawings.

In the following, many specific details of the present invention are described, such as the structure, material, size, process and technology of components, so as to understand the present invention more clearly. However, as will be understood by those skilled in the art, the present invention may be practiced without these specific details.

It should be understood that when describing the structure of a component, when a layer or a region is referred to as being "on" or "over" another layer or another region, it may mean being directly on another layer or another region, or Other layers or regions are also included between it and another layer or another region. And, if the part is turned over, the layer, one region, will be "below" or "beneath" the other layer, another region.

Fig. 1 and Fig. 2 respectively show a perspective view and a perspective exploded view of a battery module according to the present invention. The battery module of the present utility model includes a casing 100 and a soft-packed cell structure 200 . Wherein, the cavity formed by the casing 100 accommodates the pouch cell structure 200 for supporting and protecting the pouch cell structure 200 . The housing 100 includes a housing 110, a first end plate 120, a second end plate 130, a sealing ring 140, a battery management unit 150, and a flexible busbar 160.

Fig. 3 shows a perspective view of the shell of the battery module according to the present invention, Fig. 4 shows a perspective view of the first end plate in the battery module according to the present invention, and Fig. 5 shows a battery module according to the present invention Perspective view of the second endplate in . Wherein, the casing 110 is composed of four surfaces, and the four surfaces are surrounded and connected to form a space for accommodating the pouch cell structure 200 . The casing 110 includes a raised strip 111 on the inside and a fin 112 on the outside. The raised strip 111 extends to both ends of the casing 110. There may be a plurality of raised strips 111, which are respectively perpendicular to the cross section of the casing 110; The fins 112 on the outside of the housing 110 can cover the entire outside of the housing 110 , and are used to increase the surface area of the housing 110 , thereby increasing the heat dissipation area of the housing 100 . The first end plate 120 is located at the opening portion of the front end of the housing 110, and the second end plate 130 is located at the opening portion of the rear end of the housing 110, so that the housing 110, the first end plate 120 and the second end plate 130 form a closed chamber , the closed chamber can accommodate the pouch cell structure 200 . The outer side of the first end plate 120 includes an oil filling port 121 and a connector 122. Silicone oil can be filled into the casing 100 through the oil filling port 121, effectively reducing the temperature of the pouch cell structure 200, thereby ensuring the life of the battery module. The connectors 122 include positive connectors, negative connectors, input connectors, and output connectors. The shell 110, the first end plate 120 and the second end plate 130 of the shell 100 can be made of aluminum alloy and made by extrusion; the outer surface of the shell 110 can be sandblasted to further increase heat dissipation. area; the shell 100 as a whole can be treated with hard anodic oxidation, which can not only further improve the heat dissipation performance, but also ensure its insulation performance.

The sealing ring 140 is located at the connection position between the housing 110 and the first end plate 120 and the housing 110 and the second end plate 130, so that the chamber is sealed, and the protection level of the housing 100 can be IP68 (Ingress Protection, IP), preventing external Foreign matter or moisture enters the inside of the casing 100 and causes damage to the pouch cell structure 200, thereby ensuring the service life of the battery module. The inner edges of the first end plate 120 and the second end plate 130 can be provided with slots, so as to facilitate the fixed installation of the sealing ring 140 and realize the protection effect of the housing 100 more conveniently. The battery management unit 150 is located inside the casing 100 and at the front end of the housing 110 , and is used to control a plurality of batteries 210 in the pouch battery structure 200 . The soft busbar 160 includes a total positive output soft busbar and a total negative output soft busbar. The soft busbar 160 electrically connects the pouch cell structure 200 with the battery management unit 150, so that the battery management unit 150 is connected to the pouch cell structure 200. Take control. Specifically, the total positive output soft busbar electrically connects the positive pole of the pouch cell structure 200 to the battery management unit 150 , and the total negative output soft busbar electrically connects the negative pole of the pouch cell structure 200 to the battery management unit 150 .

Fig. 6 and Fig. 7 respectively show the three-dimensional view and three-dimensional exploded view of the structure of the soft-packed electric core according to the present invention, Fig. 8 shows the three-dimensional view of a plurality of supports in the structure of the soft-packed electric core according to the present utility model, Fig. 9 shows A perspective view of the third end plate in the pouch cell structure according to the present invention is shown. The pouch cell structure 200 inside the case 100 includes a plurality of brackets 220 , a plurality of cells 210 , a third end plate 230 , a heat conducting sheet 240 , an insulating plate 250 , a connector 270 , a fixing plate 260 and a spring pad 280 . Wherein a plurality of brackets 220 are arranged and distributed, and are respectively located between a plurality of electric cores 210, and the plurality of supports 220 are fixedly connected to each other, thereby fixing the plurality of electric cores 210, which can effectively prevent the multiple electric cores 210 from swelling. The mounting dimensions deviate so that the mounting tolerances can be strictly controlled. The edges of the plurality of brackets 220 arranged in sections are provided with first grooves 221 , matching with the protruding strips 111 located inside the casing 110 . The third end plate 230 is composed of two parts, which are respectively located at two ends of the plurality of brackets 220 and fixedly connected with the plurality of brackets 220 . The edges of the third end plate 230 are respectively provided with second grooves 231, corresponding to the positions of the first grooves 221, and at the same time matching with the protruding strips 111 located inside the housing 110, so that the pouch cell structure 200 can The first groove 221, the second groove 231 and the protrusion 111 are fixed inside the housing 100, limiting the movement of the pouch cell structure 200 relative to the housing 100 in a direction parallel to the cross section of the housing 100, so that The pouch cell structure 200 is firmly fixed inside the casing 100 .

The battery module of the present utility model is connected with the first grooves 221 of the plurality of brackets 220 in the pouch cell structure 200 and the second grooves 231 of the third end plate 230 through the convex strip 111 located on the inner wall of the casing 110 Compatible so that the pouch cell structure 200 can be fixed in the casing 100 ; meanwhile, the outer wall of the casing 110 is provided with fins 112 for accelerating the heat dissipation of the pouch cell structure 200 . At the same time, the casing 100 is made of aluminum. Since aluminum is a material with high thermal conductivity and high heat dissipation, it can further accelerate the heat dissipation of the pouch cell structure 200 under the premise of ensuring the stability of the battery module, thereby ensuring the performance of the battery module. Extend the service life of the battery module.

At the same time, there can be multiple thermal conductive sheets 240, which are respectively located between the multiple battery cells 210 to separate the multiple battery cells 210 from each other. The heat of the core is exported in time to prevent the potential battery core in the middle from accumulating more heat and causing thermal runaway. The insulating plate 250 is located on the left and right sides of the pouch cell structure 200 , and separates the tabs of the plurality of cells 210 from the housing 110 to prevent conduction between the pouch cell structure 200 and the casing 100 . The insulation board 250 can be a blister cover, which has the advantages of simple process, light specific gravity, low cost and good insulation performance.

There are multiple connecting pieces 270 located on the left and right edges of the brackets 220 , that is, there is one connecting piece 270 on the left and right edges of each bracket to electrically connect the tabs of the multiple battery cells 210 to the soft busbar 160 . The connecting piece 270 can be made of pure aluminum or nickel-plated aluminum, so it has the advantages of low cost and good manufacturability. Meanwhile, the connecting member 270 can also be made of other suitable materials. The fixing plate 260 is located between the tabs of the plurality of battery cells 210 and the connecting piece 270 . The spring washer 280 is located between the connecting piece 270 and the insulating plate 250 , and is used to separate the tabs of the plurality of battery cells 210 from the insulating plate 250 . In addition, the fixed connection between the fixed plate 260 , the connecting piece 270 , the spring pad 280 and the left and right edges of the plurality of brackets 220 may be a bolted connection, so as to facilitate later disassembly and maintenance.

It should be noted that in this article, relational terms such as first and second etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or order between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

Embodiments according to the present invention are as described above, and these embodiments do not exhaustively describe all details, nor limit the utility model to only the specific embodiments described. Obviously many modifications and variations are possible in light of the above description. This description selects and specifically describes these embodiments in order to better explain the principle and practical application of the utility model, so that those skilled in the art can make good use of the utility model and the modification and use on the basis of the utility model . The invention is to be limited only by the claims and their full scope and equivalents.

Claims (9)

1. a kind of battery modules, which is characterized in that including：

Soft pack cell structure, including multiple holders and multiple battery cores on the multiple holder, the multiple holder Arranged distribution, and corresponding first groove is arranged in the multiple bracket edge；

Shell includes forming the space for accommodating the soft pack cell structure, the case inside setting by the circular shell in four sides The raised line that the oriented shell both ends extend, the raised line are adapted to first groove so that the soft pack cell structure limit Position.

2. battery modules according to claim 1, which is characterized in that the shell further includes：

Fin is located at the hull outside.

3. battery modules according to claim 1, which is characterized in that the shell further includes：

First end plate is located at the case nose；

Second end plate is located at the outer casing back, and closed chamber is formed with the shell and the first end plate；

Sealing ring is located at the shell and the first end plate and the link position of the shell and second end plate, makes Obtain the cavity seal.

4. battery modules according to claim 3, which is characterized in that the shell further includes：

Battery management unit is located at the housing forward end, and close to the front end of the soft pack cell structure；

The battery management unit and the soft pack cell structure are electrically connected by soft busbar,

The first end plate includes：

Pouring orifice；

Connector is located on the outside of the first end plate, is electrically connected with the battery management system.

5. battery modules according to claim 4, which is characterized in that the connector includes：Positive connector negative patches At least one of part, input connector, output connector.

6. battery modules according to claim 1, which is characterized in that the soft pack cell structure further includes：

Third end plate is located at the multiple holder both ends, includes the second groove positioned at third end plate edge, and described second Groove is adapted with the raised line；

The multiple battery core is spaced from each other by thermally conductive sheet between the multiple battery core；

Insulation board is located between the lug and the shell of multiple battery cores.

7. battery modules according to claim 6, which is characterized in that the soft pack cell structure further includes：

The lug of the multiple battery core is electrically connected by connector with the soft busbar；

Fixed plate is located between the lug and the connector of the multiple battery core；

Spring washer, between the connector and the insulation board.

8. battery modules according to claim 7, which is characterized in that the connector, the fixed plate, the spring washer with The multiple holder is fixedly connected.

9. battery modules according to claim 8, which is characterized in that fixed between the multiple holder and third end plate Connection so that the multiple battery core position is fixed.