CN115395170A

CN115395170A - Battery module for vehicle, vehicle and method for manufacturing battery module

Info

Publication number: CN115395170A
Application number: CN202211198275.1A
Authority: CN
Inventors: 陆珂伟; 葛海龙; 李钊; 孙昌瑞; 陈秋云; 李雪萌
Original assignee: SAIC Motor Corp Ltd
Current assignee: SAIC Motor Corp Ltd
Priority date: 2022-09-29
Filing date: 2022-09-29
Publication date: 2022-11-25
Anticipated expiration: 2042-09-29
Also published as: CN115395170B

Abstract

The present application provides a battery module for a vehicle, including: a package assembly having an internal cavity; and a die assembly configured to be disposed in the internal cavity of the package assembly; wherein, the encapsulation subassembly includes: a housing forming a top surface, a bottom surface, a left side surface and a right side surface of the package assembly; a front side cover forming a front side surface of the package assembly; and a rear side cover forming a rear side of the package assembly; wherein the housing, the front side cover, and the rear side cover are configured to together define and enclose an interior cavity of the enclosure assembly; and wherein the front side cover includes: a front cover body configured to be adapted to be connected to the case and having thermal conductivity so as to facilitate heat dissipation of the battery module; the front side voltage signal acquisition electrode is connected to the front side cover body; wherein, via the voltage sampling sheet, the electric core component is electrically communicated and radiates to the voltage signal collecting electrode. The application also provides a manufacturing method and a vehicle.

Description

Battery module for vehicle, vehicle and method for manufacturing battery module

Technical Field

The present invention relates to a battery module, and more particularly, to a battery module for a vehicle. Additionally, the present application relates to a vehicle. Additionally, the present application relates to a method of manufacturing a battery module.

Background

In the field of vehicle manufacturing, new energy vehicles are being developed vigorously. Many new energy vehicles employ electrical energy as power (e.g., full or at least a portion of the power) to drive the vehicle. Batteries have therefore been introduced as a source of providing such power.

However, the batteries used in the prior art still have problems. For example, the heat dissipation capability of the battery remains deficient. This drawback is particularly pronounced in the case of vehicles requiring rapid charging. This may result, for example, in an inability to quickly, efficiently, and effectively dissipate heat generated within the battery in a desired amount of time. Failure to dissipate heat in a timely manner can have serious adverse effects on the battery, even on a vehicle that includes such a battery (e.g., performance degradation, reduced life, reduced safety, and high cost).

One of the reasons for such problems is that the battery module is limited in its own structure, which causes the battery module not to sufficiently utilize all surfaces for heat dissipation. In the prior art, no one has ever proposed using the side on which the terminal is provided as a heat transfer surface, and all six-sided heat transfer of the battery module cannot be achieved. For example, in the structure of one battery module of the related art, since the components located inside the battery module near the top surface of the battery module are a terminal post, an explosion-proof valve, a bus bar, and/or a low-voltage wire harness, etc., the top surface of the battery module cannot be an effective heat radiation surface.

This prior art design affects the heat dissipation efficiency of the battery module and thus limits further improvement of the rapid charging rate. The resulting extension of the charging time is urgently needed.

In view of, but not limited to, the above, it would be desirable to provide a novel battery module to overcome at least the above problems.

Disclosure of Invention

The present application seeks to provide a battery module which is advantageous over the prior art in at least one respect.

To this end, the present application provides in one aspect a battery module for a vehicle, comprising: a package assembly having an internal cavity; and a battery cell assembly configured to be disposed in the internal cavity of the package assembly; wherein the package assembly includes: a housing forming a top surface, a bottom surface, a left side surface and a right side surface of a package assembly; a front side cover forming a front side of the package assembly; and a rear side cover forming a rear side of the package assembly; wherein the housing, the front side cover, and the rear side cover are configured to together define and enclose an interior cavity of the package assembly; and wherein the front side cover includes: a front-side cover body configured to be adapted to be connected to a case and having thermal conductivity so as to facilitate heat transfer of the battery module; and a front side voltage signal collector connected to the front side cover body; wherein, via the voltage sampling piece, the electrode core subassembly is extremely connected with voltage signal acquisition pole and carries out the heat transfer with voltage signal acquisition pole, makes top surface, bottom surface, left surface, right flank, front surface and the trailing flank of encapsulation subassembly (X) constitute six heat transfer faces from this for battery module's heat dissipation and heating.

Optionally, in one embodiment, the battery module further includes: a thermally conductive fill medium positioned between the cells and the housing of the cell assembly and facilitating heat transfer from the cells and the housing.

Optionally, in one embodiment, the plurality of cells of the cell assembly are connected to each other in series and/or in parallel without a bus bar.

Optionally, in an embodiment, the rear side cover is provided with a rear side voltage signal collector configured and adapted to collect a voltage signal indicative of a voltage value of the battery cell.

Optionally, in one embodiment, the rear cover is provided with a rear explosion-proof valve configured to facilitate avoidance of explosion of the battery module.

Optionally, in one embodiment, the front side cover further comprises a battery module positive output pole and a battery module negative output pole; and wherein the battery module positive output pole is configured to be adapted to be in electrical communication to the electric core assembly body positive output pole of the electric core assembly, and the battery module negative output pole is configured to be adapted to be in electrical communication to the electric core assembly body negative output pole of the electric core assembly.

Optionally, in one embodiment, the front side cover further comprises an electrical isolation member, and wherein the electrical isolation member is disposed between the battery module positive output pole and the front side cover body and is configured to electrically isolate the front side cover body relative to the battery module positive output pole.

Optionally, in one embodiment, the front-side cover further comprises an electrical isolation component, and wherein the electrical isolation component is disposed between the front-side voltage signal collector and the front-side cover body and is configured to electrically isolate the front-side cover body relative to the front-side voltage signal collector.

The present application, in another aspect, may also include a vehicle comprising: at least one of the above-described battery modules for a vehicle; and a vehicle body configured to accommodate the battery module mounted thereon.

The present application may further include a method of manufacturing a battery module for a vehicle, wherein the battery module is the above-described battery module for a vehicle.

Six faces (i.e., all outer faces) of the battery module according to the present application can serve as effective heat transfer faces (heat dissipation faces and heating faces). This not only increases the area for dissipating heat outward, but also reduces the thermal resistance of the entire system. In this way, heat generated in the battery module can be effectively, efficiently and safely dissipated to the outside during the charging of the battery module, particularly during the rapid charging of the battery module. This design is particularly advantageous in vehicle designs where rapid charging is required. In addition, this design can also have a beneficial effect when the battery module is heated to raise its temperature when the battery module is subjected to low temperatures. For example, in a scene requiring heating, six faces (i.e., all outer faces) of the battery module may also serve as heating faces, facilitating rapid temperature rise of the battery module. In addition, the battery module of the present application is only connected to the voltage signal collecting electrode through the voltage sampling sheet (without any wire harness and/or buffer member), and the cell assembly is in electrical communication with the voltage signal collecting electrode and is in direct heat transfer with the voltage signal collecting electrode, so that the structure is compact and the heat transfer efficiency is high. On the other hand, in the battery module according to the present application, the plurality of battery cells are electrically connected to each other in series and/or in parallel without requiring a bus bar or the like. This further contributes to an integrated, compact structural design, and to an increase in the efficiency of the battery module itself and of the system in which the battery module is present.

Drawings

Fig. 1 illustrates a battery module according to an embodiment of the present application, wherein a packaging assembly is shown.

Fig. 2 illustrates an exploded view of a battery module according to an embodiment of the present application.

Fig. 3 illustrates a battery module according to an embodiment of the present application, in which the electric core assembly is shown and the packaging assembly is omitted.

Fig. 4a shows the inside and outside of the front side cover of the battery module according to an embodiment of the present application.

Fig. 4b illustrates the inside and outside of the rear side cover of the battery module according to one embodiment of the present application.

Fig. 5 illustrates a longitudinal section of a cell assembly of a battery module according to an embodiment of the present application.

Fig. 6 illustrates a cross-section of an electrical core assembly of a battery module according to an embodiment of the present application.

Fig. 7 illustrates a configuration of a plurality of battery modules according to an embodiment of the present application.

Detailed Description

Some possible embodiments of the present application are described below with reference to the drawings. It should be noted that the figures are not drawn to scale. Some details may be exaggerated for clarity and some details not necessarily shown may be omitted.

The application discloses a battery module. Such a battery module is particularly suitable for use in and provides power to a vehicle. Therefore, such a battery module may also be referred to as a power battery module.

Referring to fig. 1 and 2, a battery module M according to an embodiment of the present application is shown. The battery module M may include a packing assembly X and a core assembly 800. The packing member X is formed to function to seal the battery assembly 800 and to reinforce the structural strength of the battery module M.

As shown in fig. 1, a package assembly X of a battery module M is shown. The package assembly X has an internal cavity and the electrical core assembly is disposed in the internal cavity.

The package assembly X may include a housing 5. Housing 5 forms the top surface, bottom surface, left surface and the right surface of encapsulation subassembly X.

Preferably, the material constituting the housing 5 may include a material having a high thermal conductivity; optionally a metal-containing material; such as metallic materials, alloy materials, etc.; specific examples are aluminum, steel, and the like.

The packaging assembly X may further include a front side cover 1 and a rear side cover 9. The front cover 1 and the rear cover 9 are configured to be disposed opposite to each other. The front cover 1 forms the front side of the package. The rear cover 9 forms a rear side of the package X.

The housing 5, the front side cover 1 and the rear side cover 9 are configured to together define and enclose the internal cavity of the packaging assembly X.

As shown in fig. 3, a cell assembly 800 of a battery module according to an embodiment of the present application is shown. The cell assembly can include a cell assembly body 802, and a cell assembly body positive output pole 801 and a cell assembly body negative output pole 803 extending from the cell assembly body 802, respectively. The electric core assembly body 802 is capable of storing electric energy for use as a power source. The electric energy stored in the cell assembly body 802 is output to the outside via the cell assembly body positive output pole 801 and the cell assembly body negative output pole 803 to provide power for driving the vehicle.

As shown in fig. 4a, which illustrates the front side cover 1 of the battery module according to one embodiment of the present application, wherein a left side portion of fig. 4a illustrates the front side cover 1 as viewed from the outside to the inside, and a right side portion of fig. 4a illustrates the front side cover 1 as viewed from the inside to the outside.

The front cover 1 may include a front cover body 104. The front cover body 104 is configured to be adapted to be connected to the housing 5. The front cover body 104 is configured to facilitate heat dissipation. In this way, at least a portion of the heat inside the battery module M may be released to the outside of the battery module M through the front cover body 104, thereby contributing to the reduction in the temperature of the battery module M.

Preferably, the material constituting the front cover body 104 may include a material having a high thermal conductivity. Alternatively, the material comprising the front cover body 104 may comprise a metal-containing material. For example, the material comprising the front cover body 104 may include aluminum alloys, steel, and/or (certain specific) plastics, among others. In this way, heat dissipation may be facilitated. Additionally, the front cover body 104 may be preferably provided with an electrical isolation coating (e.g., electrical isolation paint) and/or an electrical isolation film. In this way, adverse effects such as electric leakage can be prevented.

The front cover 1 may further include a battery module positive output electrode 101 and a battery module negative output electrode 102. The battery module positive output electrode 101 and the battery module negative output electrode 102 are connected to the front cover body 104, respectively. Battery module positive output 101 is configured and adapted for electrical communication to core assembly body positive output 801. The battery module negative output pole 102 is configured and adapted to be in electrical communication to the battery assembly body negative output pole 802. By this configuration, the electrical communication between the battery module positive output electrode 101 and the electric core assembly body positive output electrode 801 and the electrical communication between the battery module negative output electrode 102 and the electric core assembly body negative output electrode 802 are utilized, and the battery module positive output electrode 101 and the battery module negative output electrode 102 can output the electric energy stored in the electric core assembly body 802 to the outside to provide power for driving the vehicle.

Preferably, the battery module positive output electrode 101 may have a protrusion protruding toward the inner chamber.

Such a protrusion facilitates the manufacturing process. In addition, the presence of such protrusions can allow for more efficient electrical communication of battery module positive output pole 101 to electric core assembly body positive output pole 801.

Preferably, the battery module negative output electrode 102 may have a protrusion protruding toward the inner chamber.

Such a protrusion facilitates the manufacturing process. In addition, the presence of such a protrusion may allow for more efficient electrical communication of the battery module negative output pole 102 to the battery pack body negative output pole 802.

The front side cover 1 may further include a front side voltage signal collector 103. The front side voltage signal sampling electrode 103 is connected to the front side cover body 104; for example, the front-side voltage signal sampling pole 103 is directly fixed to the front-side cover body 104; for another example, the front-side voltage signal sampling pole 103 is indirectly fixed to the front-side cover body 104. Optionally, the front side voltage signal sampling electrode 103 is disposed between the battery module positive output electrode 101 and the battery module negative output electrode 102.

The front side voltage signal collector 103 is configured and adapted to collect a voltage signal indicative of the voltage value of the cell assembly body 802. In this manner, via the front-side voltage signal sampling electrode 103, voltage values of the core assembly and/or one or more cells in the battery module M can be obtained and/or monitored, facilitating knowledge of the battery module M by the vehicle and/or a person using the vehicle, thereby facilitating prediction of the situation and/or taking action accordingly.

The front-side voltage signal sampling pole 103 is additionally configured to facilitate heat dissipation. In this way, at least a portion of the heat inside the battery module M may be released to the outside of the battery module M through the front-side voltage signal sampling electrode 103, thereby contributing to the reduction in the temperature of the battery module M.

Preferably, the front-side voltage signal collecting electrode 103 may have a protrusion protruding toward the inner chamber. The presence of such a protrusion may allow the front-side voltage signal collector electrode 103 to more efficiently and/or more conveniently acquire voltage values of the cell assembly and/or one or more cells in the battery module M.

As shown in fig. 4a, the front side voltage signal sampling electrode 103 is configured as one voltage signal sampling electrode. In an embodiment not shown, the front side voltage signal sampling pole 103 may be a plurality of voltage signal sampling poles.

In embodiments where the front-side voltage signal sampling pole 103 is a plurality of voltage signal sampling poles, the number of the plurality of voltage signal sampling poles may be configured to correlate with the number of cells in the cell assembly body 802. For example, the number of voltage signal sampling poles may be equal to the number of cells. For another example, the number of voltage signal sampling poles may be smaller than the number of cells. For another example, the number of voltage signal sampling poles may be equal to the number of cells minus 1.

In an embodiment where the front voltage signal sampling electrode 103 is a plurality of voltage signal sampling electrodes, the arrangement of the plurality of voltage signal sampling electrodes may be configured to be related to the arrangement of the cells in the cell assembly body 802. For example, two adjacent voltage signal sampling poles of the plurality of voltage signal sampling poles may be arranged at equal intervals. For another example, the plurality of voltage signal sampling poles may be arranged in parallel. For another example, the plurality of voltage signal sampling poles may be alternately arranged. In addition, it is understood that the arrangement of the plurality of voltage signal sampling poles may be any suitable combination of the above.

The front cover 1 may further include a front explosion-proof valve 105. The front explosion-proof valve 105 may be configured to be connected to the front cover body 104. The disposition of the front side explosion-proof valve 105 to the battery module M may be advantageous in preventing explosion of the battery module, particularly, in preventing explosion of the battery module M due to excessively high temperature.

In an alternative embodiment, the front explosion-proof valve 105 may be configured to be remote from the battery module positive output terminal 101, the battery module negative output terminal 102, and/or the front voltage signal sampling terminal 103.

In an alternative embodiment, the front explosion proof valve 105 may be a plurality of front explosion proof valves.

In embodiments where the front side explosion-proof valve 105 is a plurality of front side explosion-proof valves, the plurality of front side explosion-proof valves may be configured to be associated with the cells in the cell assembly body 802 and/or the cell assembly body 802. For example, the number of the plurality of front-side explosion-proof valves may correspond to the number of cells in the cell assembly body 802. As another example, the positioning of the plurality of front-side explosion-proof valves can correspond to the positioning of the cells in the cell assembly body 802. As another example, the arrangement of the plurality of front-side explosion-proof valves may correspond to the arrangement of the cells in the cell assembly body 802.

The cell assembly body 802 may include a plurality of cells. Each cell has a cell positive output pole and a cell negative output pole. In two adjacent battery cells, the positive battery cell output electrode of one battery cell is electrically connected to the negative battery cell output electrode of the other battery cell. The temperature at the junction of such a positive output pole and a negative output pole may rise sharply when the battery module M outputs electric energy to the outside to supply power.

In one embodiment, the front explosion-proof valve 105 may be configured to be disposed at or near the junction of such positive and negative output poles. In this way, the safety of the battery module M can be further improved.

The front cover 1 may further include an electrical isolation member 106. The electrical isolation member 106 may be disposed between the battery module positive output electrode 101 and the front cover body 104. The electrical isolation member 106 may also be arranged to electrically isolate the front cover body 104 from the battery module positive output electrode 101. In this way, the current for powering, which is transmitted through the battery module positive output electrode 101, can be prevented from leaking to the front-side cover body 104, thereby improving the safety of the battery module M.

Additionally, alternatively or additionally, the electrical isolation component 106 may also be disposed between the battery module negative output pole 102 and the front cover body 104. The electrical isolation component 106 may also be arranged to electrically isolate the front cover body 104 from the battery module negative output pole 102. In this way, the current for powering, which is transmitted through the battery module negative output electrode 101, can be prevented from leaking to the front side cover body 104, thereby improving the safety of the battery module M.

Additionally, alternatively or additionally, the electrical isolation component 106 may also be disposed between the front side voltage signal sampling electrode 103 and the front side cover body 104. The electrical isolation component 106 may also be arranged to electrically isolate the front cover body 104 relative to the front voltage signal sampling electrode 103. In this way, it is possible to prevent the current for supplying the voltage signal, which is transmitted through the front side voltage signal sampling electrode 103, from leaking to the front side cover body 104, thereby improving the safety of the battery module M.

In one embodiment, it is understood that the electrical isolation component 106 is necessary when the material forming the front cover body 104 is a conductive material (e.g., a metal, among others). In another embodiment, it is understood that when the material constituting the front cover body 104 is a non-conductive material (such as plastic, in particular), the electrical isolation member 106 is not necessary, and preferably, the electrical isolation member 106 may be omitted.

The battery module M may further include a positive output electrode tab 2. The positive output pole tab 2 is configured to: the battery module positive output electrode 101 is electrically connected to the cell assembly body positive output electrode 801 via the positive output electrode tab 2. Preferably, battery module positive output terminal 101 must be electrically connected to cell assembly body positive output terminal 801 via positive output terminal tab 2. In this way, an easier assembly can be achieved.

The positive output pole connecting piece 2 has an outer side and an inner side opposite to the outer end. The outer side of the positive output electrode tab 2 has a shape and/or size suitable to fit the positive output electrode 101 of the battery module. The inner side of the positive output pole tab 2 has a shape and/or size suitable to fit the positive output pole 801 of the cell assembly body.

Preferably, the material constituting the positive output electrode tab 2 may include: conductive material and electrically isolating material. The conductive material is, for example, a metal material. For example, the positive output pole tab 2 may include: an electrically conductive portion composed of an electrically conductive material and an electrically isolating portion composed of an electrically isolating material partially covered by the electrically conductive material. In the positive output electrode tab 2, a conductive material is used for electrical connection to the core assembly body positive output electrode 801, and an electrical isolation material is used for electrically isolating a portion composed of a conductive material from surrounding parts.

Preferably, the conductive portion of the positive output pole tab 2 is connected to the core assembly body positive output pole 801 via laser welding. Alternatively or additionally, the electrically isolating portion and the electrically conducting portion may form a unitary structure using injection molding.

The battery module M may further include a negative output electrode connection tab 3. The negative output electrode tab 3 is configured to: the battery module negative output electrode 102 is electrically connected to the core assembly body negative output electrode 802 via the negative output electrode connecting piece 3. Preferably, the battery module negative output electrode 102 must be electrically connected to the core assembly body negative output electrode 802 via the negative output electrode connection piece 3. In this way, an easier assembly can be achieved.

The negative output electrode tab 3 has an outer side and an inner side opposite the outer end. The outer side of the negative output electrode connecting piece 3 has a shape and/or size suitable for fitting the battery module negative output electrode 102. The inner side of the negative output electrode connecting piece 3 has a shape and/or size suitable for matching with the negative output electrode 802 of the electric core assembly body.

Preferably, the material constituting the negative output electrode connection piece 3 may include: conductive material and electrically isolating material. The conductive material is, for example, a metal material. For example, the negative output electrode tab 3 may include a conductive portion composed of a conductive material and an electrically isolated portion of an electrically isolating material partially covered by the conductive material. In the negative output electrode tab 3, a conductive material is used for electrical connection to the core assembly body negative output electrode 802, and an electrical isolation material is used for electrically isolating a portion composed of a conductive material from surrounding parts.

Preferably, the conductive portion of the negative output electrode connecting tab 3 is connected to the core assembly body negative output electrode 802 by means of laser welding. Alternatively or additionally, the electrically isolating portion and the electrically conducting portion may form a unitary structure using injection molding.

The battery module M may further include a voltage sampling sheet 4. The voltage sampling sheet 4 is configured to: via the voltage sampling strip 4, the front-side voltage signal sampling electrode 103 can acquire and/or monitor voltage values of the cell assembly and/or one or more cells in the battery module M.

Preferably, the material constituting the sampling sheet 4 may include: a conductive material. The electrically conductive material is, for example, a metal material, preferably a metal material having a high thermal conductivity. In this way, heat generated in the cells 8 can be dissipated to the outside, for example to the top cover.

Preferably, the voltage sampling pad 4 is connected to the front side voltage signal sampling electrode 103 via laser welding.

As shown in fig. 4b, which illustrates the rear side cover 9 of the battery module according to one embodiment of the present application, wherein a left portion of fig. 4b illustrates the rear side cover 9 as viewed from the outside to the inside, and a right portion of fig. 4b illustrates the rear side cover 9 as viewed from the inside to the outside.

The rear cover 1 may include a rear cover body 904. The rear cover body 904 is configured to be adapted to be connected to the housing 5. The rear cover body 904 is configured to facilitate heat dissipation. In this way, at least a portion of the heat inside the battery module M may be released to the outside of the battery module M through the rear cover body 904, thereby contributing to a reduction in the temperature of the battery module M.

Preferably, the material constituting the rear cover body 904 may include a material having a high thermal conductivity. Alternatively, the material comprising the rear cover body 904 may comprise a metal-containing material. For example, the material comprising the rear cover body 104 may include aluminum alloys, steel and/or (certain specific) plastics, and the like. In this way, heat dissipation may be facilitated. Additionally, the rear cover body 904 may be preferably provided with an electrical isolation coating (e.g., electrical isolation paint) and/or an electrical isolation film. In this way, adverse effects such as electric leakage can be prevented.

The rear-side cover 9 may also include a rear-side voltage signal collector electrode 903. The rear side voltage signal sampling electrode 903 is connected to the rear side cover body 904; for example, the rear voltage signal sampling pole 903 is directly fixed to the rear cover body 904; for another example, the rear voltage signal sampling pole 903 is indirectly fixed to the rear cover body 904.

Alternatively, the rear cover 9 may not have the battery module positive output electrode 101 and/or the battery module negative output electrode 102. Alternatively, the back side voltage signal collector 903 may be a substitute for the front side voltage signal collector 104. Alternatively, the back side voltage signal collector 903 may be a complement to the front side voltage signal collector.

Depending on the configuration and construction of the front-side voltage signal sampling pole 103, the back-side voltage signal sampling pole 903 may have a commensurate configuration, size, and/or construction.

The rear voltage signal collector 903 may be configured and adapted to collect a voltage signal indicating a voltage value of the electric core 8 and/or the electric core assembly body 802. In this manner, via the backside voltage signal sampling electrode 903, voltage values of the core assembly and/or one or more cells in the battery module M can be obtained and/or monitored, which facilitates understanding of the battery module M by the vehicle and/or a person using the vehicle, thereby facilitating predicting a situation and/or taking action accordingly.

The backside voltage signal sampling pad 903 is additionally configured to facilitate heat dissipation. In this way, at least a portion of the heat inside the battery module M may be released to the outside of the battery module M through the rear-side voltage signal sampling electrode 903, thereby contributing to a reduction in the temperature of the battery module M.

Preferably, the rear-side voltage signal collector electrode 903 may have a protrusion protruding toward the inner chamber. Such a protrusion facilitates the manufacturing process. In addition, the presence of such a protrusion may enable the backside voltage signal collector 903 to more efficiently and/or more conveniently capture voltage values of the cell assembly and/or one or more cells in the battery module M.

As shown in fig. 4b, the back side voltage signal sampling pole 903 is configured as two voltage signal sampling poles. In embodiments not shown, the back side voltage signal sampling pole 903 may be one back side voltage signal sampling pole 903 or three or more voltage signal sampling poles.

In embodiments where the back-side voltage signal sampling pole 903 is a plurality of voltage signal sampling poles, the number of the plurality of voltage signal sampling poles can be configured to correlate with the number of cells in the cell assembly body 802. For example, the number of voltage signal sampling poles may be equal to the number of cells. For another example, the number of the voltage signal sampling poles may be smaller than the number of the battery cells. For another example, the number of voltage signal sampling poles may be equal to the number of cells minus 1.

In addition, in embodiments where both the back side voltage signal sampling electrode 903 and the front side voltage signal sampling electrode 103 are present in the battery module M, the total number of back side voltage signal sampling electrodes 903 and front side voltage signal sampling electrodes 103 may be configured to correlate with the number of cells in the cell assembly body 802; or the number of the rear voltage signal sampling poles 903 and/or the number of the front voltage signal sampling poles 103 can be configured to be associated with the number of cells in the cell assembly body 802, respectively.

For example, the total number of the back-side voltage signal sampling poles 903 and the front-side voltage signal sampling poles 103 may be equal to the number of the battery cells; or the number of the rear-side voltage signal sampling poles 903 and/or the front-side voltage signal sampling poles 103 may be equal to the number of the battery cells, respectively.

For another example, the total number of the rear-side voltage signal sampling electrodes 903 and the front-side voltage signal sampling electrodes 103 may be less than the number of the battery cells; or the number of the rear-side voltage signal sampling poles 903 and/or the front-side voltage signal sampling poles 103 may be smaller than the number of the battery cells, respectively.

For another example, the total number of the rear-side voltage signal sampling electrodes 903 and the front-side voltage signal sampling electrodes 103 may be equal to the number of the battery cells minus 1; or the number of the rear-side voltage signal sampling poles 903 and/or the front-side voltage signal sampling poles 103 is respectively equal to the number of the battery cells minus 1.

In embodiments where the back side voltage signal sampling pole 903 is a plurality of back side voltage signal sampling poles, the arrangement of the plurality of back side voltage signal sampling poles may be configured to correlate with the arrangement of the cells in the cell assembly body 802. For example, two adjacent voltage signal sampling poles of the plurality of back side voltage signal sampling poles may be arranged at equal intervals. For another example, the plurality of backside voltage signal sampling poles may be arranged in parallel. For another example, the plurality of backside voltage signal sampling electrodes may be alternately arranged. In addition, it is understood that the arrangement of the plurality of backside voltage signal sampling poles may be any suitable combination of the above.

The rear cover 9 may also include a rear explosion-proof valve 905. The back side explosion-proof valve 905 may have a suitable configuration, size and/or configuration.

A rear explosion-proof valve 905 may be configured to be connected to the rear cover body 904. The rear side explosion-proof valve 905 is configured such that the battery module M can be advantageous to prevent explosion of the battery module, particularly, to prevent explosion of the battery module M due to excessively high temperature.

In an alternative embodiment, the back-side explosion-proof valve 905 may be configured to be remote from the back-side voltage signal sampling pole 903.

In an alternative embodiment, the back side explosion proof valve 905 may be a plurality of back side explosion proof valves.

In embodiments where the back-side explosion-proof valve 905 is a plurality of back-side explosion-proof valves, the plurality of back-side explosion-proof valves can be configured to be associated with the cells in the cell assembly body 802 and/or the cell assembly body 802. For example, the number of the plurality of rear explosion-proof valves may correspond to the number of cells in the cell assembly body 802. As another example, the positioning of the plurality of rear explosion-proof valves can correspond to the positioning of cells in the cell assembly body 802. As another example, the arrangement of the plurality of rear explosion-proof valves may correspond to the arrangement of the cells in the cell assembly body 802.

The rear cover 9 may also include an electrical isolation member 906. The electrical isolation component 106 may be disposed between the back side voltage signal sampling pole 903 and the back side cover body 904. The electrical isolation component 106 may also be arranged to electrically isolate the rear cover body 904 from the rear voltage signal sampling electrode 903. In this way, it is possible to prevent the current for supplying the voltage signal, which is transmitted through the rear voltage signal sampling pole 903, from leaking to the rear cover body 904, thereby improving the safety of the battery module M.

In one embodiment, it is understood that electrically isolating members 906 are necessary when the material comprising rear cover body 904 is a conductive material (e.g., a metal, among others). In another embodiment, it is understood that when the material comprising the rear cover body 904 is a non-conductive material (such as plastic, among others), the electrical isolation member 906 is not necessary, and preferably, the electrical isolation member 906 may be omitted.

In an optional embodiment, the voltage sampling sheet 4 may be additionally configured to: via the voltage sampling pad 4, the rear voltage signal sampling electrode 903 can acquire and/or monitor voltage values of a cell assembly and/or one or more cells in the battery module M.

In one embodiment, it is understood that the rear side cover 9 of the battery module may have the same or similar configuration as the front side cover 1 of the battery module partially or completely. And will not be described in detail herein.

Fig. 5 and 6 illustrate cross-sectional views of a cell assembly 800 of a battery module according to an embodiment of the present application in two directions perpendicular to each other, wherein fig. 5 illustrates a longitudinal section of the cell assembly 800, and fig. 6 illustrates a transverse section of the cell assembly 800.

The cell assembly 800 may include at least one cell 8. The at least one cell 8 may include a positive electrode coating, a positive electrode current collector, a separator, a negative electrode coating, and a negative electrode current collector.

And a battery cell packaging structure can be arranged outside the at least one battery cell. The cell encapsulation structure is used to seal and electrically isolate the cell 8 from the outside. Alternatively, the material constituting the cell encapsulation structure may include polypropylene (PP), polyethylene (PE). Optionally, an aluminum plastic film may be used to construct the cell packaging structure.

As shown in fig. 5, the front-side voltage signal collector 103 obtains the voltage value of the at least one battery cell 8 via the voltage sampling sheet 4. The at least one battery cell 8 may be a plurality of battery cells 8. For example, as shown in fig. 6, 4 cells 8 are shown (of course, it may be appreciated that the number of cells may be any suitable number as desired). Alternatively, the plurality of battery cells 8 may be connected in series with each other. Alternatively, the plurality of battery cells 8 may be connected in parallel with each other. Preferably, the plurality of battery cells 8 may be connected in a combination of series connection and parallel connection. Preferably, the plurality of battery cells 8 are connected to each other without a bus bar.

The electrical core assembly 800 may also include a thermally conductive filler medium 6. The thermally conductive fill medium 6 is configured to facilitate heat dissipation from the cell 8 in a direction toward the housing 5. The thermally conductive fill medium 6 is configured and adapted to contact the cell 8 and the housing 5. For example, a first surface section of the thermally conductive filling medium 6 contacts the battery cell 8 and a second surface section of the thermally conductive filling medium contacts the housing 5, wherein the first surface section is different from the second surface section. Optionally, the first face portion is opposite the second face portion. Optionally, the first face portion may comprise a plurality of first face portions. Optionally, the second face section may comprise a plurality of second face sections. Preferably, the size and/or shape of the first face portion is configured to correspond to the size and/or shape of the second face portion. Optionally, the size and/or shape of the first face portion is configured to be substantially equal to the size and/or shape of the second face portion.

In an alternative embodiment, the thermally conductive filling medium 6 may be arranged at the top face of the cell 8. In a further alternative embodiment, the thermally conductive filling medium 6 may be arranged (separately) at the bottom side of the battery cell 8. In yet another alternative embodiment, the thermally conductive fill medium 6 may be disposed in an interior cavity of the battery module M, except for the space occupied by the cells 8. For example, the thermally conductive fill medium 6 substantially completely fills (e.g., by potting) the internal cavity of the battery module M except for the space occupied by the cells 8.

In an alternative embodiment, the thermally conductive filler medium 6 may be fixed to the cell 8. For example, the heat conductive filling medium 6 may be fixed to the battery cell 8 by means of adhesion.

Preferably, the material constituting the thermally conductive filling medium may include a thermally conductive paste, such as Polyurethane (PU), epoxy, or the like.

Returning to fig. 2, the battery module M may further include an elastic member 7. The number of the elastic elements 7 may be one or more. The elastic element 7 has the property of stretching spatially in the event of an external force. Resilient member 7 may be configured to facilitate assembly of cell assembly 800 into the internal cavity of battery module M. Alternatively or additionally, the resilient element 7 may be configured to be able to absorb and/or resist expansion of the cell 8 during use (e.g. due to excessive temperatures).

The elastic member 7 may be disposed between the electric core assembly 800 and the inner wall of the housing 5. Alternatively, the elastic member 7 may be disposed to be located between the left side of the electric core assembly 800 and the inner wall of the left side of the housing 5 and/or between the right side of the electric core assembly 800 and the inner wall of the right side of the housing 5. Alternatively, the elastic element 7 may be arranged between one cell and another cell, wherein the other cell is adjacent to the one cell.

Preferably, the material constituting the elastic member 7 may include Polyurethane (PU), foam, or the like.

As shown in fig. 7, which illustrates a configuration of a plurality of battery modules according to an embodiment of the present application. Fig. 7 shows 9 battery modules therein. Of course, it will be appreciated that the number of battery modules may be any suitable number as desired. A plurality of battery modules are arranged together in any suitable manner. For example, as shown in fig. 7, a plurality of battery modules are horizontally arranged in a direction perpendicular to the front-rear direction. In addition, facing the front side and the rear side, heat dissipating harmonica tubes A1 and A2 are arranged, respectively. Facing the top and the ground, water-cooled panels A3 and A4 are arranged. In this way, heat dissipation of the battery module M can be further facilitated.

The application also discloses a manufacturing method of the battery module. The battery module is any one of the battery modules described above.

The plurality of cells and the elastic member 7 are stacked together.

The plurality of battery cells 8 are electrically connected in series and/or in parallel. Adjacent cells 8 are connected via their matching output poles to form a conductive loop.

The output electrode connected as described above is further connected to the voltage sampling pad 4 by means of soldering.

Connecting the cell assembly body positive output pole 801 (e.g., via positive output pole connection tab 2) to the battery module positive output pole 101 of the front side cover 1; connecting the cell assembly body 802 (e.g., via the negative output electrode connecting tab 3) to the battery module negative output electrode 102 of the front side cover 1; and connecting the voltage sampling pad 4 to the front side voltage signal collector electrode 103. Thereby forming an integral body.

The whole is inserted into the housing 5.

The case 5 is welded to the front side cover 1.

Welding the voltage sampling sheet 4 and the voltage sampling electrode 903 of the rear side cover 9 to each other; for example: the voltage sampling piece 4 is welded to the voltage sampling electrode 903 of the rear cover 9.

The case 5 is welded to the rear side cover 9.

In the above manner, the battery module M can be obtained.

The present application also discloses a vehicle that may include a battery module as disclosed herein. The vehicle may further include a vehicle body configured to accommodate the battery module M mounted thereon.

Preferably, the vehicle may be a new energy vehicle. For example, the vehicle may be a pure electric vehicle or a hybrid vehicle. Electric-only vehicles are powered by electrical energy entirely to drive the vehicle. Hybrid vehicles may employ both traditional energy sources (e.g., gasoline or natural gas or ethanol, etc.) and electrical energy to provide power to drive the vehicle.

The vehicle may be of any suitable vehicle variety. Preferably, the vehicle is a passenger car or a sedan.

The battery module and/or the cell material of the battery module of the present application may be a lead-acid battery, a nickel-cadmium battery, a nickel-hydrogen battery, or a lithium ion battery.

According to the battery module, the charging time can be shortened, and the rapid charging with higher multiplying power compared with the scheme in the prior art can be supported.

In the battery module according to the present application, the battery module has 6 effective heat dissipation surfaces due to its innovative front-side cover design. Through the mode, the heat dissipation rate of the battery module is improved, so that heat dissipation is effectively and efficiently carried out in the quick charging process, and the use friendliness to users is improved. In addition, the voltage sampling piece configuration according to the battery module of this application is configured to can be effectual with the heat transfer of electric core to the module side cap region to taken away by the cold source, thereby reduced local temperature peak. Therefore, in the battery module of this application, the regional heat transfer efficiency to the cold source of electric core output pole is higher, more is favorable to reducing local temperature. In addition, the battery module of the present application is in direct heat transfer with the voltage signal collecting electrode and the electric core assembly is in electrical communication with the voltage signal collecting electrode only via the voltage sampling sheet (without any wire harness and/or buffer member), so that the structure is compact and the heat transfer efficiency is high. In addition, in the battery module according to the application, the plurality of battery cells are connected with each other in series and/or parallel. Compared with the prior art that an additional bus bar is needed when the battery cores of the battery module are externally connected, the number of parts of the system of the battery module is reduced. Therefore, the integration efficiency of the battery module according to the present application increases and the cost (e.g., material cost, manufacturing cost, etc.) decreases. This not only prolongs the cycle life of the battery cell, but also improves the energy density of the battery module.

In the present application, it is to be understood that the terms "front", "rear", "left" and "right" refer to positions illustrated in the figures, and such terms are intended to be illustrative and not restrictive.

In the present application, it is understood that the terms "inner" and "inwardly" correspond to a direction pointing from the external environment to the internal cavity of the battery module, and correspondingly, the terms "outer" and "outwardly" correspond to a direction pointing from the internal cavity of the battery module to the external environment.

As used herein, the term "comprising" is open-ended and includes one or more stated features, elements, components, or functions, but does not preclude the presence or addition of one or more other features, elements, components, functions, or groups thereof.

Within the scope of the present application, it is expressly intended that the various aspects, embodiments, examples and alternatives set forth in the preceding paragraphs, claims and/or in the following description and drawings, in particular the individual features thereof, may be carried out independently or in any combination. That is, features of all embodiments and/or any embodiment may be combined in any manner and/or combination unless such features are incompatible. The applicant reserves the right to change accordingly any originally filed claim or to file any new claim, including amending any originally filed claim to depend from and/or incorporate any feature of any other claim, even if not originally claimed in such a way.

Although the present application has been described herein with reference to particular embodiments, the scope of the present application is not intended to be limited to the details shown. Various modifications may be made to these details without departing from the underlying principles of the application.

Reference mark：

1-a front side cover;

2-positive output pole connecting sheet;

3-a negative output electrode connecting sheet;

4-voltage sampling sheet;

5-a shell;

6-heat conducting filling medium;

7-a resilient element;

8-electric core;

9-rear side cover;

101-positive output pole of battery module;

102-battery module negative output pole;

103-a front side voltage signal collector;

104-front side cover body;

105-a front explosion-proof valve;

106-insulation part;

801-positive output pole of electric core component body;

802-electric core assembly body;

803-negative output pole of electric core component body;

903-voltage sampling pole;

904-rear side cover body;

905-a rear explosion-proof valve;

906-insulation part;

a1-a front side radiating harmonica tube;

a2-a rear side heat dissipation harmonica tube;

b1-a top side water cooling plate;

b2-a bottom water-cooling plate.

Claims

1. A battery module for a vehicle, comprising:

a package assembly (X) having an internal cavity; and

an electrical core assembly (800), the electrical core assembly (800) configured to be placed in an internal cavity of a package assembly;

wherein the package assembly (X) comprises:

a housing (5), the housing (5) forming a top, bottom, left and right side of a package assembly (X);

a front side cover (1), the front side cover (1) forming a front side surface of a package assembly (X); and

a rear side cover (9), the rear side cover (9) forming a rear side of the package assembly (X);

wherein the housing (5), the front side cover (1) and the rear side cover (9) are configured to be able to together define and enclose an internal cavity of the packaging assembly (X);

and wherein the front side cover (1) comprises:

a front-side cover body (104), the front-side cover body (104) configured to be adapted to connect to a housing (5) and having thermal conductivity to facilitate heat transfer of a battery module; and

a front side voltage signal collector (103), the front side voltage signal collector (103) being connected to a front side cover body (104); wherein, via the voltage sampling sheet (4), the cell assembly (800) is in electrical communication with the voltage signal collecting electrode (103) and in heat transfer with the voltage signal collecting electrode (103), thereby making the top, bottom, left, right, front and back sides of the package assembly (X) constitute six heat transfer surfaces for heat dissipation and heating of the battery module.

2. The battery module for a vehicle according to claim 1, wherein the battery module (M) further includes: a thermally conductive fill medium (6), the thermally conductive fill medium (6) positioned between the cells (8) and the housing (5) of the cell assembly (800) and facilitating heat transfer between the cells (8) and the housing (5).

3. The battery module for a vehicle according to claim 1, wherein the plurality of cells (8) of the cell assembly (800) are connected to each other in series and/or in parallel without a bus bar.

4. The battery module for a vehicle according to claim 1, wherein the rear side cover (9) is provided with a rear side voltage signal collector (903), the rear side voltage signal collector (903) being configured and adapted to collect a voltage signal indicative of a voltage value of the battery cell (8).

5. The battery module for a vehicle according to claim 1, wherein the rear side cover (9) is provided with a rear side explosion-proof valve (905), the rear side explosion-proof valve (905) being configured to facilitate avoidance of explosion of the battery module (M).

6. The battery module for a vehicle according to claim 1, wherein the front side cover (1) further includes a battery module positive output pole (101) and a battery module negative output pole (102); and wherein the battery module positive output pole (101) is configured to be adapted to be in electrical communication to the cell assembly body positive output pole (801) of the cell assembly (800), and the battery module negative output pole (102) is configured to be adapted to be in electrical communication to the cell assembly body negative output pole (802) of the cell assembly (800).

7. The battery module for a vehicle according to claim 6, wherein the front side cover (1) further includes an electrical isolation member (106), and wherein the electrical isolation member (106) is disposed between the battery module positive output pole (101) and the front side cover body (104), and is configured to electrically isolate the front side cover body (104) from the battery module positive output pole (101).

8. The battery module for a vehicle according to claim 1, wherein the front side cover (1) further includes an electrical isolation member (106), and wherein the electrical isolation member (106) is disposed between the front side voltage signal collector electrode (103) and the front side cover body (104), and is configured to electrically isolate the front side cover body (104) from the front side voltage signal collector electrode (103).

9. A vehicle, comprising: at least one battery module (M) for a vehicle according to any one of claims 1 to 8; and a vehicle body configured to be adapted to mount the battery module (M) thereon.

10. A method of manufacturing a battery module, wherein the battery module is the battery module for a vehicle according to any one of claims 1 to 8.