CN106803608A - Battery module and new energy automobile - Google Patents

Abstract

The invention discloses a battery module and a new energy automobile. The battery module comprises a frame structure, a plurality of battery cell units are arranged in the frame structure, each battery cell unit comprises a single battery cell, a heat conducting sheet and a heat insulating sheet, the single battery cell is provided with a positive electrode ear and a negative electrode ear on at least one end part, one side of the heat conducting sheet is arranged on the single battery cell to conduct battery cell heat, the other side of the heat conducting sheet is arranged on the heat insulating sheet to avoid adjacency, and heat is transferred between the single battery cells of the battery cell units. The battery module has high heat transfer efficiency and high battery pack cooling and heating efficiency.

Description

Battery modules and new energy vehicles

technical field

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

The present invention also relates to the field of new energy vehicles, in particular to a new energy vehicle equipped with the above-mentioned battery module.

Background technique

At present, the power battery module, especially the flexible packaging power battery module, has a complex structure and difficult assembly, and the fixing method of multiple bolts causes problems such as high cost and low production efficiency. The design is not universal, and the mods cannot be extended. In addition, in order to meet the needs of high-power charging and discharging, the battery cells need to be able to transfer heat to the heat exchange interface in a timely and efficient manner. At the same time, in order to avoid the thermal influence between the battery cells when the module is abused or a single battery cell is damaged, Thermal isolation is also required. In view of the above requirements, it is necessary to develop an excellent module design that is easy to assemble, high in production efficiency, has a universal design, and has high thermal conductivity and good thermal insulation between cells.

Contents of the invention

The technical problem to be solved by the present invention is to provide a battery module, which has improvements in design, integration and production compared with existing battery modules.

A battery module related to the present invention includes a frame structure, and a plurality of battery cells are arranged in the frame structure, and each battery cell unit includes a single battery cell, a heat-conducting sheet and a heat-insulating sheet. The single cell has a positive tab and a negative tab on at least one end, the single cell is provided on one side of the heat conduction sheet to conduct the heat of the cell, and the other side of the heat conduction sheet is provided with the insulation The heat sheet is used to avoid heat transfer between the single cells of the adjacent cell units.

Optionally, in the battery module above, the battery module further includes at least one harness plate, and the harness plate is arranged near the position of the positive and negative tabs to receive the plurality of wires arranged in series or in parallel. The positive and negative tabs of each battery unit, the wiring harness board also pre-integrates the jumper connecting the positive and negative tabs of the multiple battery units and the output terminal as the output of the multiple battery units .

Optionally, in the battery module above, the wiring harness plate has a first surface facing the plurality of battery cells and a second surface facing away from the first surface, and the second surface has a The connection end for the electrical connection of the positive and negative lugs of the single cell, the pre-integrated jumper and the output end are respectively connected to the connection end, wherein the jumper spans a certain number of electric The area of the connecting end to which the lugs of the core unit are connected.

Optionally, in the battery module above, the heat insulating sheet is provided with a first buckle fixing structure connected to the wire harness plate on at least one tab end of the battery unit; the heat insulating sheet A second buckle fixing structure connected with the heat conducting sheet is provided on the other tab end.

Optionally, in the above battery module, the frame structure includes a baffle, an insulating box is arranged inside the baffle, an isolation plate is arranged outside the wiring harness plate, and the distance between the insulating box and the isolation plate is A sampling board pre-integrated in the insulating box is provided between them for monitoring the working status of the battery module.

Optionally, in the battery module above, the frame structure includes side plates arranged on both sides in the left and right direction relative to the plurality of battery cells, and side plates arranged on both sides in the front and rear direction relative to the plurality of battery cells. The baffle plate on the end, the upper cover and the strap at the bottom of the plurality of battery cells, the side plate and the baffle plate are connected by welding, and the side plate and the upper cover are welded Connection, the connection between the side plate and the strap is welded.

Optionally, in the above battery module, a heat insulating plate is provided between at least one of the baffles and the battery unit.

Optionally, in the above battery module, the heat conducting sheet is also provided with a flange as a heat transfer surface, and a certain number of notches are provided on the outer side of the flange, and the battery module further includes no more than There are a number of straps in the number of notches, the straps cross the battery unit, are embedded in the notches of the flanges of the heat conduction sheet of each battery unit, and are connected to the frame structure.

Optionally, in the above battery module, the positive tab and the negative tab of the single cell have the same material.

Optionally, in the above battery module, the positive tab of the single cell has a first material, the negative tab has a second material, and a turnover surface is also covered on the surface of the positive tab or the negative tab, The turnover surface is a thin layer of the second material on the surface of the positive tab or a thin layer of the first material on the surface of the negative tab.

Optionally, in the battery module above, one of the positive tab and the negative tab of the single cell is a composite plate with the first material and the second material, and the pure first material of the composite plate is A part is encapsulated inside the single battery core, a part of the composite plate purely of the second material is used as a tab lead-out end, and the other of the positive tab and the negative tab has the second material.

The present invention has the following technical effects:

1) The heat transfer efficiency of the battery cell is high, and the cooling and heating efficiency of the module is high. The invention adopts an independent heat conducting sheet, which can transfer the heat of each electric core separately. In a cell unit, there is only one single cell, one heat conduction sheet and one heat shield, so the heat of the single cell can be transferred through the heat conduction sheet.

2) The heat insulation between the cells is good, which effectively avoids the heat diffusion caused by abuse or failure. When multiple battery cells form a battery cell group, it will be found that there must be a heat shield between the single cells of every two adjacent battery cells, which avoids the heat between the single cells. diffusion. Therefore, the present invention can not only effectively transfer the heat of each electric core, but also isolate the heat of each electric core, greatly improving the heat transfer efficiency. In the present invention, the heat of the battery cell can be transferred to the bottom of the battery module through the bottom flange of the heat conduction sheet. In order to further improve the heat transfer efficiency, the strap at the bottom of the battery module and the flange of the heat conduction sheet have corresponding designs. . The designed straps are embedded in the flanges of the heat conducting fins, so that the flanges as heat transfer surfaces can exchange heat directly with the additional cold plate.

3) The present invention can facilitate series-parallel connection of batteries in groups, and has versatility. When the battery cells are arranged in series, side by side, or combined in series and parallel in a certain way, the integration of the battery cells can be facilitated through the wiring harness board. Jumpers and output terminals are pre-integrated on the wiring harness board, and the tabs of each cell unit are connected according to the design, and the electrical connection is realized through the jumpers and output terminals. Because of the existence of the wiring harness board, various arrangements of the battery cells in the battery module can be made.

4) The present invention can be processed on the tabs of the battery core, which is convenient for positive and negative tabs to be welded. The invention can not only ensure the electrochemical potential, but also make the positive and negative tabs of the electric core have the same material to facilitate welding. That is to say, the surface of a lug is covered with a welded peripheral surface, which is a thin layer of material different from the material of the lug. Alternatively, one tab is made into a composite material plate, one pure material part is encapsulated inside the battery core, and another pure material part is used as a lead-out end, and the material of the other tab is the same as the lead-out end. This facilitates the welding of the positive and negative tabs.

5) The present invention has simple structure, convenient assembly, high reliability and convenient mass production. In the original battery module, the connections between the parts are fixed by bolts, while the parts in the battery module of the present invention are fixed by snap connection or welding instead of bolts, wherein the snap connection is detachable Type connection, laser welding can be used for welding. Therefore, whether it is the internal connection of the battery unit, the connection of the frame structure, or the connection of the battery unit group and the wiring harness board, etc., it can be conveniently realized.

The present invention also relates to a new energy vehicle provided with the above-mentioned battery module, so it has the above-mentioned technical effects.

Other aspects and features of the present invention will become apparent from the following detailed description with reference to the accompanying drawings. It should be understood, however, that the drawings are designed for purposes of illustration only and not as a limitation of the scope of the invention since reference should be made to the appended claims. It should also be understood that the drawings are only intended to conceptually illustrate the structures and processes described herein and, unless otherwise indicated, have not necessarily been drawn to scale.

Description of drawings

The present invention will be more fully understood by reference to the following detailed description of specific embodiments when taken in conjunction with the accompanying drawings, in which like reference numerals refer to like elements throughout the views. in:

Figures 1a-1b are schematic diagrams of the assembled battery module according to the present invention, wherein Figure 1a is a side perspective view where the upper cover can be seen, and Figure 1b is a side perspective view where the bottom strap can be seen;

2 is an exploded view of the structure of the battery module involved in the present invention;

Figure 3a is a schematic diagram of the installation of components on the end (front end or rear end) of the battery module involved in the present invention;

3b-3d are structural schematic diagrams of the baffle plate, insulating box and insulating plate of the battery module involved in the present invention;

Fig. 4a is a structural schematic diagram of the installation of the wiring harness board and the battery cell unit of the battery module involved in the present invention;

4b-4c are structural schematic diagrams of the first surface and the second surface of the wiring harness plate in the battery module involved in the present invention;

Fig. 5 is a schematic diagram of the structure of the wiring harness board installed in the battery module in Fig. 4a-4c;

6a-6b are structural schematic diagrams of the composition of the cell unit of the battery module involved in the present invention; and

7a-7c are respectively structural schematic diagrams of a single battery cell, a heat conduction sheet and a heat insulation sheet in a cell unit of a battery module according to the present invention.

detailed description

In order to help those skilled in the art to accurately understand the claimed subject matter of the present invention, the specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

Referring to Figures 1a-1b, which are perspective views of the battery module according to the present invention, Figure 1a shows the top of the battery module, and Figure 1b shows the bottom of the battery module. FIG. 2 is an exploded view of the battery module. As can be seen from the above figures, the battery module has a frame structure, which can be an all-metal frame, which includes a top cover 1, two left and right side panels 2, two front and rear baffles 3, and multiple straps 4 at the bottom . The upper cover 1 is connected to the two side panels 2 , the two baffle panels 3 are respectively connected to the two side panels 2 , and a plurality of straps 4 are connected to the two side panels 2 . These connections can be achieved by means of welding such as laser welding or arc welding to achieve the integration of the above components, so the entire frame structure has reliable welding strength. Inside the frame structure is a row of neatly arranged cell units, and each cell unit is composed of a single cell 11 , a heat conducting sheet 12 and a heat insulating sheet 13 . These battery cells exist as chip units and are arranged in series or in parallel according to the design. The specific structure of the battery cells and the electrical connection between them will be described in detail below. The two side plates 2 clamp and arrange the cell units. In order to prevent heat transfer from the single cell 11 through the side plate 2, a heat insulation plate 10 is also provided between the single cell 11 and the side plate 2 ( See Figure 2).

The single cell 11 has a positive tab and a negative tab on at least one end thereof. When the single battery cell 11 , the heat conducting sheet 12 and the heat insulating sheet 13 form a battery cell unit, the two tabs are extended. These tabs are received on harness plates 7, the number of which depends on the arrangement of the tabs. When a pair of tabs of a single cell 11 is on one end, a harness plate 7 is provided on the end; when the positive tab of the single cell 11 is on the front end and the negative tab is on the rear end, the two ends One wiring harness board 7 is respectively arranged on each, that is, there are two wiring harness boards 7 in total. The tabs can pass through the wire harness plate 7 and be bent, and then be electrically connected to the connection end (described below) on the wire harness plate 7 by means of welding, such as laser welding. The jumper 8 and the output terminal 9 are pre-integrated on the wiring harness board 7. The so-called jumper 8 is to electrically connect the tabs 113 and 111 of multiple battery units, and the so-called output terminal 9 is used as a plurality of battery units. unified output. Therefore, for a design with only one wiring harness board 7 , two positive and negative output terminals 9 need to be provided on the same wiring harness board 7 . As for two wiring harness boards 7 , one wiring harness board 7 and one output terminal 9 may be provided.

The wire harness plate 7 is covered with an isolation plate 6 for electrical insulation treatment to isolate high voltage. The sampling board 15 (sampling PCB board) is pre-integrated in an insulating box 5 , and the insulating box 5 is fixed on the insulating board 6 . The sampling board 15 is a PCB board through which the internal working state of the battery module can be learned, and there are sampling wiring harnesses and communication wiring harnesses etc. on it. The baffle plate 3 is buckled outside the insulating box 5, and its two bent edges overlap the two ends of the left and right side panels 2, and the connection is completed by the aforementioned laser welding or argon arc welding. In addition, a certain number of straps 4 are used on the bottom of the battery module and welded to corresponding positions on the left and right side plates 2 . Finally, connect the wiring harness on the sampling board 15, and buckle the protective cover 14 to form a complete battery module as shown in the figure.

Figure 3a shows an exploded view of the front end (or rear end) of the battery module. 3b-3d respectively show the structural diagrams of the baffle plate 3, the insulating box 5 and the isolation plate 6. The main body of the baffle plate 3 is provided with a positioning hole 31 for connecting with the insulating box 5 . Mounting holes 32 and bent edges are provided on both sides of the baffle plate 3, and the bent edges are used for welding with the ends of the side plates 2 to form a frame structure. After the welding of the frame structure is completed, the installation hole 32 can be used as a fixing point for installing the battery module.

The top of the insulating box 5 is provided with an outlet 51 for the sampling board, which can facilitate the entry and exit of the sampling wire harness and the communication wire harness of the sampling board. The left and right sides of the insulating box 5 are provided with installation via holes 52 for connecting with the internal isolation board 6 . The main body of the insulating box 5 is provided with a positioning pin 53 corresponding to the baffle plate 3 to position components. The main body of the insulating box 5 is also provided with a boss 54 to position the baffle 3 and the insulating box 5 and limit the upward movement of the baffle 3 .

The isolation plate 6 isolates the high-voltage tab of the internal cell unit from the external sampling plate, and plays the role of electrical insulation. The left and right sides of the isolation plate 6 are provided with installation holes 61 corresponding to the installation through holes 52 of the insulating box 5 , and these installation holes 61 are fixed with the installation through holes 52 . The edge of the isolation board 6 is also provided with buckles 62 close to the four corners, and these buckles 62 are used to cooperate and lock with the bayonet 74 of the wire harness plate 7 mentioned below. An edge of the isolation plate 6 is also provided with a port 63, which is used to lead out the output terminal 9 of the internal battery unit through output confluence, and another protective cover (not shown in the figure) is buckled on the port 63 to compress the output 9.

Refer to FIG. 4 a , which shows a schematic diagram of the wire harness plate 7 and the battery unit to be connected. 4b-4c show the first surface 77 of the wire harness plate 7 facing the battery unit and the second surface 78 facing the isolation plate 6, respectively. The wiring harness plate 7 is formed by plastic parts with high structural strength and high dielectric strength. On the second surface 78 , the connecting end 71 is injected or inlaid. The connecting end 71 is made of high-conductivity metal such as copper or pure aluminum, and is used for welding with the positive and negative tabs 113 and 111 of the single cell 11 . A row of via holes 75 is also arranged on the wiring harness plate 7 corresponding to the tabs 113, 111 of each cell unit. When the tabs 113, 111 pass through the via holes 75 from the first surface 77 to the second surface 78, the The connecting end 71 is bent and welded with the connecting end 71, such as laser welding. The top of the wiring harness plate 7 is designed with an outlet 72 through which the sampling wiring harness representing the voltage on the connection terminal 71 , the jumper 8 , and the output terminal 9 can be drawn out. The output port 73 is located on the same side of the wire outlet 72 , and the common output of the cell unit—the output end 9 is connected to the outside through the output port 73 on the wiring harness board 7 . The wire harness plate 7 is provided with a bayonet 74 at a position corresponding to the buckle 62 of the isolation plate 6 , which can cooperate with the buckle 62 to fix the isolation plate 6 on the wire harness plate 7 . There are a plurality of protruding buckles 76 on the first surface 77 of the wiring harness plate 7. As can be seen from the figure, the buckles 76 are in groups of two and correspond to the number of battery cells, which are used to connect with the battery cells in the battery unit. The heat shield 13 cooperates to facilitate the installation and fixing of the wiring harness plate 7 .

Returning to Fig. 4a, when the cell units are arranged in series and parallel in a certain way, the positive tab 113 and the negative tab 111 of the single cell 11 in each cell unit are connected from the through hole 75 of the corresponding wiring harness plate 7. According to the needs of series and parallel connection, they are respectively bent to the connecting end 71 of the wiring harness plate 7, and then laser welding is performed to make the positive tab 113 and the negative tab 111 of the single cell 11 form an electrical connection with the connecting end 71 of the wiring harness plate 7. connect. When the positive and negative tabs 113 and 111 of the single battery cell 11 are arranged at both ends, there are two wiring harness plates arranged at the front and rear ends of the battery cell unit respectively. When the positive and negative tabs 113, 111 of the single cell 11 are arranged at one end, there is a wire harness plate 7 connected to the tabs 113, 111. At this time, the via hole 75 of the wire harness plate 7 is designed according to the actual situation of the tabs. .

Before assembling the wiring harness board 7 , the jumper 8 and the output end 9 are pre-welded on the connection end 71 of the second surface 78 of the wiring harness board 7 or on corresponding positions. The jumper piece 8 spans the area of the connection end 71 where the plurality of tabs are located, so as to perform electrical connection between the battery cells. The output terminal 9 is the total output of the battery unit output. FIG. 5 shows the structure after the wiring harness plate 7 is installed in place.

In addition, it is conceivable that, when the positive and negative tabs 113, 111 of the single cell 11 are arranged at both ends, not only the wiring harness plate 7 is two pieces, but also the isolation plate 6, the sampling plate 15, and the insulating box 5 should be Even numbers and arranged on the front and rear ends of the battery module.

Next, refer to Figs. 6a-6b, which are exploded views of the battery unit, and Figs. 7a-c are schematic structural diagrams of components of the battery unit. There are multiple battery cells in a battery module, and these battery cells are arranged in series and parallel and arranged in a row to form a battery pack. Each cell unit includes at least a single cell 11 , a heat conducting sheet 12 and a heat insulating sheet 13 . It can be seen from FIGS. 6a-6b that the heat conducting sheet 12 is located between the single cell 11 and the heat insulating sheet 13 . One side of the heat conducting sheet 12 is the single cell 11 , and the other side is the heat insulating sheet 13 . The heat conducting sheet 12 is punched out from a high heat conducting metal sheet such as copper or pure aluminum. Heat insulating sheet 13 is made of heat insulating and fireproof material. The large surface of the single battery cell 11 is attached to the heat conduction sheet 12 , in order to ensure a sufficient heat conduction contact area, a heat conduction glue can be coated between the single battery cell 11 and the heat conduction sheet 12 . The other side of the heat conducting sheet 12 is fixedly connected with the heat insulating sheet 13 . In the combination of a set of arranged battery cells, the single battery cell 11 of the next battery cell unit is attached to the heat insulating sheet 13 of the previous battery cell unit. This just means that the heat of each single battery cell 11 can only be conducted through the heat conduction sheet 12 in contact with it in this group of battery cells, and, because there must be a gap between the heat conduction sheets 12 of adjacent battery cells The heat sheet 13 , due to the heat insulation of the heat insulating sheet 13 , avoids the transfer of heat between different single cells 11 , thereby effectively avoiding the thermal diffusion between the single cells 11 of adjacent cell units.

Referring to Fig. 7a, taking the positive and negative tabs 113 and 111 of the single cell 11 at both ends of the single cell 11 as an example, the positive tab 113 is made of the first material, the negative tab 111 is made of the second material, and the first material Both the second material and the second material are metals, and the use of different materials for the tab can ensure the electrochemical potential and avoid causing electrochemical corrosion, but the difficulty of welding dissimilar metals is greatly increased. For this reason, on the surface of one of the tabs, for example, on the surface of the negative tab 111, at least a first material foil is provided as the welding turnover surface 112, so the negative tab 111 can be made of the same material as the positive tab 113 during welding. Alternatively, one of the tabs is made into a composite material plate, for example, the negative tab 111 is formed as a composite material plate with the first material and the second material, wherein the pure second material part of the composite material plate is encapsulated in the single cell 11 Inside, the pure first material portion is the lead-out end of the negative tab 111, and the positive tab 113 is purely the first material; or the positive tab 113 is formed as a composite material plate with the first material and the second material, wherein the composite material plate The pure first material part is packaged inside the single cell 11 , the pure second material part is the lead-out end of the positive tab 113 , and the negative tab 111 is pure second material.

When the positive tab 113 of the single battery cell 11 is made of pure aluminum and the negative tab 111 is made of pure copper, a thin layer of aluminum foil can be welded on the surface of the negative tab 111, such as ultrasonic welding, as the welding turnover surface 112, or use The copper-aluminum composite plate is used as the negative tab 111, in which the pure copper part is packaged inside the single cell 11, and the pure aluminum part is used as the lead-out end of the negative tab 111, so that the negative tab 111 and the positive tab 113 are made of the same pure aluminum material , can facilitate laser welding.

Or, as a non-power battery module, it is also possible to ultrasonically weld a thin layer of copper foil on the surface of the positive tab 113 as the transfer surface/welding turnover surface 112, or to use a copper-aluminum composite plate as the positive tab 113, wherein The pure aluminum part is packaged inside the single cell 11, and the pure copper part is used as the lead-out end of the positive tab 113, so the negative tab 111 and the positive tab 113 are made of the same pure copper material, which is convenient for brazing.

A schematic structural diagram of the heat conducting sheet 12 is shown in FIG. 7b. The heat conduction sheet 12 is machined and formed by high heat conduction metal plates such as pure copper or pure aluminum. One end of the heat conducting sheet 12 is provided with a bayonet 121 for connecting with the heat insulating sheet 13 . The large surface 125 of the heat conducting sheet 12 serves as a heat transfer surface in contact with the large surface of the single cell 11 . The bottom of the heat conduction sheet 12 is bent into a flange 124 to serve as a heat transfer surface for the heat conduction sheet 12 to transmit heat downward. After the battery module is assembled, another cold plate is provided at the bottom thereof to contact the flange 124 of the heat conducting sheet 12 for heat exchange. A series of reinforcing ribs 122 are punched on the flange 124 to ensure the overall rigidity of the heat conducting sheet 12, and a plurality of notches 123 are also stamped on the flange 124, at most the number of straps 4 corresponding to the number of notches 123 is along the These notches 123 cross the cell unit group and are welded to the side plates 2 on both sides. Due to the effect of the notch 123 , the strap 4 can be embedded in the notch 123 , so that the flange 124 as the heat transfer surface does not interfere with the strap 4 .

FIG. 7c is a schematic structural diagram of the heat insulating sheet 13 . The heat insulating sheet 13 is made of heat insulating and fireproof material, such as PI, PA, PE, POM, mica and other materials can be used. The large surface 132 of the heat insulating sheet 13 serves as an isolation surface to avoid heat transfer between the single cells 11 . One end of the heat insulating sheet 13 is provided with a buckle 131 for fixing with the bayonet socket 121 on the heat conducting sheet 12 . The other end of the heat shield 13 is provided with a bayonet 133, which is interlocked with the buckle 76 on the wire harness plate 7 introduced earlier, so that the wire harness plate 7 and the battery unit are fixed, improving the assembly of the battery module. efficiency. It should be known that when the wire harness plate 7 is installed on the front and rear ends of the battery unit, the bayonets 133 of the heat insulating sheet 13 should also be symmetrically arranged on the two ends. Here, the bayonet 133—the buckle 76 connection is a practical and reliable connection scheme. Referring to Figure 6b, the bayonet 133 can be bent into a right-angled U-shape, and the buckle 76 is cylindrical with a circumferential groove in the middle. When the buckle 76 penetrates into the bayonet 133, the bayonet 133 is restricted in the circumferential groove , thus completing the connection. This connection is convenient and reliable, and can be disassembled and reused. Bayonets 133, 121 can be formed on both ends of the heat insulating sheet 13 (as shown in Figure 7c) to connect with the wiring harness plate 7, or formed on one end of the heat conducting sheet 12 (as shown in Figure 7b) to insulate from the heat Sheet 13 is connected. The buckles 131 and 76 can be formed on one end of the heat insulating sheet 13 (as shown in FIG. 7c ) to connect with the heat conducting sheet 12 , or formed on the first surface 77 of the wire harness plate 7 (as shown in FIG. 4b ).

After the single cell 11 , the heat conducting sheet 12 and the heat insulating sheet 13 form a cell unit, multiple cell units can be arranged in series and parallel. In the battery module shown in Figures 4a and 5, the positive and negative tabs 113, 111 are separately arranged at both ends of the single battery cell 11 as an example. There are 12 battery cells in the battery module, and each The same tabs of the 4 battery cells are arranged at the same end. These 4 battery cells are connected in parallel and form a battery unit group. Therefore, the battery module has a first battery unit group, a second battery core unit group and the third battery cell unit group. Then connect these three sets of battery unit groups in series, that is, the same electrodes of the first battery unit group and the second battery unit group are not at the same end, and the same electrodes of the second battery unit group and the third battery unit group are not at the same end. same end. For example, referring to FIG. 4 a , it will be seen from the right that the positive pole of the first battery unit group, the negative pole of the second battery unit group, and the positive pole of the third battery unit group. On the wiring harness board 7 shown in the figure, the pre-integrated jumper 8 spans the position where the first cell unit group and the second cell unit group, that is, a total of eight cell units, are located. On the wiring harness plate 7 at the other end, the pre-integrated jumper 8 will span the position where the second battery unit group and the third battery unit group are located, that is, a total of eight battery units. At the same time, the output end 9 of the entire battery module is pre-integrated at a diagonal position on the wiring harness plate 7 relative to the jumper 8 . Or, it is conceivable that another pre-integrated jumper can also be used at this position, that is, in the wiring harness plate 7 as shown in the figure, the second jumper straddles the third cell unit group, that is, four In the area of the connection end 71 covered by the positive ear 113 of the first cell unit, on the harness plate at the other end that cannot be seen, the second jumper spans the negative electrodes of the first cell unit group, that is, the four cell units In the area of the connection end 71 covered by the ear 111, these second jumper pieces are respectively connected to each output end. In the harness plate 7 as shown, this output 9 is a positive output, while on the harness plate (not shown but conceivable) at the opposite end, the output is a negative output.

It is conceivable that the cell units can also be arranged in other arrangements according to the design requirements, and the electrical connection part and structure of the wiring harness board 7, as well as the layout of the pre-connected jumper 8 and the output terminal 9 will also change accordingly. . The arrangement of the cell units of the battery module of the present application is not limited to the above-mentioned manner.

After the wiring harness plate 7 is fixed to the 12 battery cells, an electrically insulating isolation plate 6 can be mounted on the outside of the wiring harness plate 7, and the output terminal 9 is drawn out from the port 63. Install the sampling plate 15 inside the insulating box 5 first, and then fix the insulating box 5 on the insulating plate 6 . Then install the baffle plate 3 on the outermost side, and the baffle plate 3 is welded to the two side plates 2 . The strap 4 is passed through from the bottom, and is welded to the side plate 2, so that the frame structure is formed. Finally, the sampling wiring harness is connected, and the output pole protection cover 14 is buckled on the isolation plate 6 to complete the assembly of the battery module.

For the convenience of introduction, the directional terms such as "side", "side panel" and "both sides" mentioned in this application refer to the left and right (or transverse) directions of the battery module shown in the drawings, while "end ", "both ends", "front end", "rear end" and other orientation terms refer to the front and rear (or axial) directions of the battery module. In addition, orientation terms such as "top" and "bottom" refer to the up-down direction of the battery module. However, the above terms of direction or orientation are only used for convenience of description, and those skilled in the art can imagine that the description of the battery module may not be limited to the above terms of direction or orientation. In three-dimensional space, these directional or orientation terms can vary.

While specific embodiments of the invention have been shown and described in detail to illustrate the principles of the invention, it should be understood that the invention may be embodied in other ways without departing from such principles.

Claims (12)

1. a kind of battery modules, it includes frame structure, and multiple battery core units, its feature are disposed with the frame structure It is：Each battery core unit includes single battery core（11）, conducting strip（12）And heat shield（13）, the single battery core（11）Tool There is the anode ear at least one end（113）And negative electrode lug（111）, the conducting strip（12）Side set monomer electricity Core（11）To conduct battery core heat, the conducting strip（12）Opposite side set the heat shield（13）For avoiding the adjacent electricity The single battery core of core unit（11）Between heat transfer.

2. battery modules according to claim 1, it is characterized in that：The battery modules also include at least one block wire harness plate （7）, the wire harness plate（7）It is arranged on the positive and negative lug（113、111）The vicinity of position is concatenated or simultaneously with receiving The described positive and negative lug of the multiple battery core unit of townhouse row（113、111）, the wire harness plate（7）The connection of upper also pre-integrated The positive and negative lug of the multiple battery core unit（113、111）Jumper（8）With as the multiple battery core unit export it is defeated Go out end（9）.

3. battery modules according to claim 2, it is characterized in that：The wire harness plate（7）With facing the multiple battery core First face of unit（77）With away from first face（77）The second face（78）, second face（78）It is upper to have for described Single battery core（11）Positive and negative lug（113、111）The connection end of electrical connection（71）, the pre-integration jumper（8）And institute State output end（9）Respectively with the connection end（71）Connection, wherein the jumper（8）Across a number of battery core unit Lug（113、111）The connection end for being connected（71）Region.

4. battery modules according to claim 2, it is characterized in that：The heat shield（13）In the battery core unit at least One lug end is provided with and the wire harness plate（7）First fixing structure for buckle of connection；The heat shield（13）In another pole Ear end is provided with and the conducting strip（12）Second fixing structure for buckle of connection.

5. battery modules according to claim 2, it is characterized in that：The frame structure includes baffle plate（3）, the baffle plate （3）Inside it is provided with insulation booth（5）, the wire harness plate（7）Outside be provided with division board（6）, the insulation booth（5）With the division board （6）Between be provided with pre-integrated in the insulation booth（5）In sampling plate, for monitoring the working condition of the battery modules.

6. battery modules according to claim 1, it is characterized in that：The frame structure is included relative to the multiple battery core Unit is arranged in the side plate on left and right directions both sides（2）, be arranged on fore-and-aft direction two ends relative to the multiple battery core unit Baffle plate（3）, upper lid（1）With the bandage positioned at the multiple battery core unit bottom（4）, the side plate（2）With the baffle plate（3） Between to be welded to connect, the side plate（2）With the upper lid（1）Between to be welded to connect, the side plate（2）With the bandage （4）Between to be welded to connect.

7. battery modules according to claim 6, it is characterized in that：At least one piece baffle plate（3）With the battery core unit Between be provided with thermal insulation board（10）.

8. battery modules according to claim 1, it is characterized in that：The conducting strip（12）It is additionally provided with flange（124）To make It is heat-transfer area, the flange（124）Outside is provided with a number of recess（123）, the battery modules are also including being not more than Recess（123）The bandage of quantity（4）, the bandage（4）The battery core unit is passed across, and is embedded in leading for each battery core unit Backing（12）Flange（124）Recess（123）It is interior and be connected with the frame structure.

9. battery modules according to claim 1, it is characterized in that：The single battery core（11）Anode ear（113）With it is negative Lug（111）With identical material.

10. battery modules according to claim 9, it is characterized in that：The single battery core（11）Anode ear（113）Have First material, its negative electrode lug（111）With the second material, in the anode ear（113）Or negative electrode lug（111）Surface on also cover There is turnover face（112）, the turnover face（112）It is the anode ear（113）The thin layer of second material on surface or The negative electrode lug（111）The thin layer of first material on surface.

11. battery modules according to claim 9, it is characterized in that：The single battery core（11）Anode ear（113）With it is negative Lug（111）One of be the composite plate with the first material and the second material, the portion of pure first material of the composite plate Divide and be encapsulated in the single battery core（11）Inside, the part of pure second material of the composite plate as lug exit, The anode ear（113）And negative electrode lug（111）The other of have the second material.

12. a kind of new-energy automobiles, it is characterized in that including according to any one of claim 1-11 described battery modules.