CN111446389A - Battery module box and battery module - Google Patents

Abstract

The invention discloses a battery module box and a battery module, comprising: a tray and at least one insulating cavity arranged on the tray, and at least one insulating upper cover is arranged on the top of each insulating cavity; the insulating cavity is open at the top The insulating cavity is provided with a plurality of cell slots that are arranged in parallel and isolated from each other. The two ends of the cell slots are respectively provided with conductive pillars that penetrate the side walls of the insulating cavity. A conductive row is arranged outside the side wall of the insulating cavity, and the conductive column is connected with the conductive row; the insulating upper cover is provided with a plurality of cover areas corresponding to the plurality of cell slots, and each cover area is provided with at least one The liquid hole and at least one explosion-proof valve are provided with a sealing structure matched with the top of the cell tank on the edge of the bottom surface of the cover area. The configuration of the large capacity and high voltage of the battery module is realized, the space of the module is fully utilized, the production process is simplified, the energy density is improved, and the production cost is reduced.

Description

Battery module box and battery module

technical field

The present invention relates to the technical field of lithium batteries, and more particularly, to a battery module box and a battery module.

Background technique

Lithium-ion power batteries have been widely used in the field of new energy pure electric vehicles and hybrid new energy vehicles. With the maturity of technology, the requirements of subsidies, the simplification of processes, and the demand of the market, the manufacturing cost, energy density and service life of lithium batteries are greatly affected. , heat dissipation efficiency and protection level also put forward new requirements. The manufacturing cost and energy density of lithium batteries seriously affect customers' requirements for lithium battery systems. Improving energy density and reducing manufacturing costs have become the fundamental solutions to the above problems.

Therefore, the present invention proposes a battery module box and a battery module, which can realize the configuration satisfying the large capacity and high voltage of the module, improve the energy density and reduce the manufacturing cost.

SUMMARY OF THE INVENTION

The purpose of the present invention is to propose a battery module box and a battery module, which can meet the configuration of the large capacity and high voltage of the module, improve the energy density and reduce the production cost.

In order to achieve the above object, the present invention provides a battery module box, comprising: a tray and at least one insulating cavity disposed on the tray, and at least one insulating upper cover is disposed on the top of each insulating cavity;

The insulating cavity is a box with an open top, and a plurality of battery cell slots arranged in parallel and isolated from each other are arranged in the insulating cavity. Conductive pillars of the wall, a conductive row is provided outside the sidewall of the insulating cavity between the adjacent cell slots, and the conductive pillar is connected to the conductive row;

The insulating upper cover is provided with a plurality of cover areas corresponding to the plurality of cell slots one-to-one, and each of the cover areas is provided with at least one liquid injection hole and at least one explosion-proof valve. The edge of the bottom surface of the area is provided with a sealing structure matched with the top of the cell groove.

Optionally, the tray is provided with a flow channel for accommodating cooling liquid, and the outer wall of the tray is provided with a liquid inlet and a liquid outlet that communicate with the flow channel.

Optionally, a heating sheet is sandwiched between the side walls of the adjacent cell slots, the heating sheet is used to heat or conduct heat to the cell, and the material of the heating sheet is copper, nickel, aluminum or stainless steel.

Optionally, the insulating cavity, the cell groove and the insulating upper cover are made of the same material, the insulating cavity is made of sheet molding compound, composite carbon fiber or plastic, and the insulating cavity is the same as that of the insulating cavity. The trays are fixedly connected by hot-melting, gluing, riveting or crimping.

Optionally, a voltage acquisition and temperature acquisition unit is provided on the conductive row, and the voltage acquisition and temperature acquisition unit is connected in communication with the battery management system.

Optionally, the number of the liquid injection holes in each of the capping areas is less than or equal to five, and the number of the explosion-proof valves in each of the capping areas is less than or equal to five.

Optionally, the top end of the insulating cavity and the edge of the insulating upper cover are sealed and connected by a sealing ring, sealant, hot plate welding, laser welding or ultrasonic welding.

Optionally, the material of the tray is aluminum, copper, iron or stainless steel.

Optionally, four corners of the insulating cavity are respectively provided with positive and negative interface lead-out rows, and the positive and negative interface lead-out rows and the conductive row are copper-aluminum composite plates, copper plates, aluminum plates or nickel plates.

The present invention also provides a battery module, comprising a plurality of battery cells and the above-mentioned battery module box, wherein a plurality of the battery cells are respectively arranged in the plurality of the battery cell slots of the battery module box, and the The battery core includes two tabs connected to the positive and negative electrodes, and the tabs are electrically connected to the conductive column.

The beneficial effects of the present invention are:

A module can be assembled on the upper part of the tray through one or more insulating cavities, and multiple battery cells can be separated through multiple battery cell slots inside the insulating cavity. The conductive bars between the cells realize the series-parallel connection between the cells, realize the configuration of large capacity and high voltage of the module, make full use of the space of the module, simplify the production process, improve the energy density, and reduce the production cost.

Further, by arranging a flow channel inside the tray, the cooling liquid can be passed into the battery module to cool down the battery module, and by arranging a heating sheet between the battery cell slots, the battery core can be heated or thermally conducted, and the temperature of the battery module can be controlled. Control, effectively improve the electrical performance of the battery module.

The apparatus of the present invention has other features and advantages which will be apparent from the drawings and the subsequent detailed description incorporated herein or from the drawings and the subsequent detailed description incorporated herein. These drawings and the detailed description are collectively used to explain certain principles of the invention.

Description of drawings

The above and other objects, features and advantages of the present invention will become more apparent from the more detailed description of the exemplary embodiments of the present invention in conjunction with the accompanying drawings, in which the same reference numerals generally refer to the same parts .

FIG. 1 shows a schematic diagram of a battery module box according to an embodiment of the present invention.

Description of reference numbers:

1. Insulation cavity; 2. Insulation cover; 3. Cell; 4. Heating sheet; 5. Tray; 6. Explosion-proof valve; 7. Liquid injection hole; Conductive row.

Detailed ways

The present invention will be described in more detail below with reference to the accompanying drawings. While preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

FIG. 1 shows a schematic diagram of a battery module box according to an embodiment of the present invention.

As shown in FIG. 1 , a battery module box according to the present invention includes: a tray 5 and at least one insulating cavity 1 disposed on the tray 5 , and at least one insulating upper cover 2 is provided on the top of each insulating cavity 1 ;

The insulating cavity 1 is a box with an open top. The insulating cavity 1 is provided with a plurality of cell slots 9 that are arranged in parallel and isolated from each other. Conductive pillars. Conductive rows 10 are provided outside the side walls of the insulating cavity 1 between adjacent cell slots 9 , and the conductive pillars are connected to the conductive rows 10 ;

The insulating upper cover 2 is provided with a plurality of cover areas corresponding to the plurality of cell slots 9 one-to-one. Each cover area is provided with at least one liquid injection hole 7 and at least one explosion-proof valve 6. There is a sealing structure matched with the top of the cell groove 9 .

Specifically, one or more insulating cavities 1 can be assembled on the upper part of the tray to form a module, and a plurality of battery cells 3 (electrochemical cells) can be accommodated through a plurality of battery cell slots 9 inside the insulating cavity 1 , and a plurality of The battery cells 3 can be connected in series and parallel between the battery cells 3 through the conductive columns penetrating the wall and the conductive rows 10 between the battery cell slots 9, which realizes the configuration of the large capacity and high voltage of the module, makes full use of the space of the module, and simplifies the The production process is improved, the energy density is improved, and the production cost is reduced. In the specific implementation process, the dimensions of the tray 5 , the insulating cavity 1 and the insulating upper cover 2 can be set according to actual requirements. For example, one tray 5 can have more than two arrangement spaces for the insulating cavities 1 . A plurality of cell slots 9 can share one or more sealing upper covers, and a plurality of insulating cavities 1 can also share an insulating upper cover 2 .

In this embodiment, the tray 5 is provided with a flow channel for accommodating the cooling liquid, the outer wall of the tray 5 is provided with a liquid inlet and a liquid outlet that communicate with the flow channel, and a heater is sandwiched between the side walls of the adjacent cell slots 9 Sheet 4, the heating sheet 4 is used to heat or conduct heat to the battery cell 3.

Specifically, by arranging a flow channel inside the tray 5, the cooling liquid can be introduced into the battery module to cool down the battery module; The temperature control of the module can effectively improve the electrical performance of the battery module. In other embodiments of the present invention, the tray 5 can also be selected without the tray 5 or the flow channel is not provided in the tray 5 . Wherein, the material of the heating plate 4 is copper, nickel, aluminum or stainless steel. In this embodiment, red copper is preferred.

In one example, the insulating cavity 1 , the insulating upper cover 2 and the cell slot 9 are made of the same material, and sheet molding compound, composite carbon fiber or plastic can be selected, and composite carbon fiber is preferred in this embodiment. The cell slot 9 can be optionally formed integrally with the insulating cavity 1 or provided separately. The top of the insulating cavity 1 is sealed with the edge of the insulating upper cover 2, which can be sealed and connected by sealing rings, sealants, hot plate welding, laser welding or ultrasonic welding according to the materials of the insulating cavity 1 and the insulating upper cover 2. The materials of the insulating cavity 1 and the tray 5 are selected to be fixedly connected by hot melting, gluing, riveting or crimping.

In this embodiment, the conductive bar 10 is provided with a voltage collection and temperature collection unit, and the voltage collection and temperature collection unit is connected in communication with the battery management system.

Specifically, the voltage collection and temperature collection unit includes a voltage sensor and a temperature sensor, and the voltage signal and temperature information collected by the voltage sensor and the temperature sensor can be transmitted to a battery management system (BMS) through a signal carrier.

In this embodiment, the number of liquid injection holes 7 in each capping area is less than or equal to five, and the number of explosion-proof valves 6 in each capping area is less than or equal to five. That is, 1 to 5 liquid injection holes 7 and 1 to 5 explosion-proof structures are provided in the area of the insulating upper cover 2 corresponding to each cell slot 9 .

In this embodiment, the material of the tray 5 is aluminum material with excellent thermal conductivity. In other embodiments of the present invention, the material of the tray 5 may also be aluminum, copper, iron or stainless steel.

In this embodiment, the four corners of the insulating cavity 1 are respectively provided with positive and negative interface lead-out rows 8, and the outer wall of the insulating cavity 1 needs to lead out the positive and negative interfaces of the battery module. The periphery of the interface lead-out row 8 is sealed and fixed. You can choose to use copper-aluminum composite plate, copper plate, aluminum plate or nickel plate as the lead-out row 8 and the conductive row 10 of the positive and negative interface.

The embodiment of the present invention also provides a battery module, which includes a plurality of battery cells 3 and the above-mentioned battery module box. The plurality of battery cells 3 are respectively arranged in a plurality of battery cell slots 9 of the battery module box. The battery cells 3 It includes two tabs connected to the positive and negative electrodes, and the tabs are electrically connected to the conductive column.

Specifically, both sides of the battery cell 3 are provided with positive and negative electrodes, the battery cell 3 is installed in the battery cell slot 9 and the two tabs are located on the upper part of the two ends of the battery cell slot 9 , and the positive and negative electrodes are connected to each other through the conductive columns between the cavities. The external conductive row 10 is connected, and the connection between the tab and the conductive column can be selected by laser welding, ultrasonic welding, electromagnetic welding or bolt fixing.

To sum up, the present invention can assemble a plurality of insulating cavities 1 on the upper part of the tray into a module, and inside the insulating cavity 1 can install a plurality of battery cells 3 at a maximum density through a plurality of battery cell slots 9 arranged in parallel. The conductive row 10 through the wall realizes the series-parallel connection between the three cells of the battery, realizes the configuration of large capacity and high voltage of the battery module, makes full use of the space of the module, simplifies the production process, improves the energy density, and reduces the production cost. .

Various embodiments of the present invention have been described above, and the foregoing descriptions are exemplary, not exhaustive, and not limiting of the disclosed embodiments. Numerous modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims (10)

1. A battery module box, comprising: a tray and at least one insulating cavity provided on the tray, and at least one insulating upper cover is provided on the top of each insulating cavity; The insulating cavity is a box with an open top, and a plurality of battery cell slots arranged in parallel and isolated from each other are arranged in the insulating cavity. Conductive pillars of the wall, a conductive row is provided outside the sidewall of the insulating cavity between the adjacent cell slots, and the conductive pillar is connected to the conductive row; The insulating upper cover is provided with a plurality of cover areas corresponding to the plurality of cell slots one-to-one, and each of the cover areas is provided with at least one liquid injection hole and at least one explosion-proof valve. The edge of the bottom surface of the area is provided with a sealing structure matched with the top of the cell groove. 2 . The battery module box according to claim 1 , wherein the tray is provided with a flow channel for accommodating cooling liquid, and the outer wall of the tray is provided with a liquid inlet and a liquid outlet communicating with the flow channel. 3 . mouth. 3 . The battery module box according to claim 1 , wherein a heating sheet is sandwiched between the side walls of the adjacent cell slots, and the heating sheet is used for heating or conducting heat on the cells, so the The material of the heating plate is copper, nickel, aluminum or stainless steel. 4 . The battery module box according to claim 1 , wherein the insulating cavity, the cell groove and the insulating upper cover are made of the same material, and the insulating cavity is made of sheet mold. 5 . Plastic, composite carbon fiber or plastic, the insulating cavity and the tray are fixedly connected by hot-melting, gluing, riveting or crimping. 5 . The battery module box according to claim 1 , wherein a voltage acquisition and temperature acquisition unit is provided on the conductive row, and the voltage acquisition and temperature acquisition unit is connected in communication with the battery management system. 6 . 6 . The battery module box according to claim 1 , wherein the number of the liquid injection holes in each of the cover areas is less than or equal to 5, and the number of the explosion-proof valves in each of the cover areas Less than or equal to 5. 7 . The battery module box according to claim 1 , wherein the top of the insulating cavity and the edge of the insulating upper cover are sealed and connected by sealing rings, sealants, hot plate welding, laser welding or ultrasonic welding. 8 . . 8 . The battery module box according to claim 1 , wherein the material of the tray is aluminum, copper, iron or stainless steel. 9 . 9 . The battery module box according to claim 1 , wherein the four corners of the insulating cavity are respectively provided with positive and negative interface lead-out rows, and the positive and negative interface lead-out rows and the conductive rows are made of copper. 10 . Aluminum composite plate, copper plate, aluminum plate or nickel plate. 10. A battery module, comprising a plurality of battery cells and the battery module box according to any one of claims 1 to 9, wherein a plurality of the battery cells are respectively arranged in the battery module box In the plurality of battery cell slots, the battery core includes two tabs connected to the positive and negative electrodes, and the tabs are electrically connected to the conductive column.

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