CN116053675A - Battery module, power battery pack and electric equipment - Google Patents

Abstract

The application provides a battery module, power battery package and consumer relates to power battery technical field. The battery module includes: the battery cells are provided with large surfaces distributed along the left-right direction, and the battery cells are distributed along the front-back direction; the module box has terminal plate spare and curb plate spare, and terminal plate spare is connected with the curb plate spare to enclose to close and form and be used for holding the free chamber that holds of battery, the terminal plate spare has along the die cavity of fore-and-aft direction distribution, and the free output department of battery is located to the terminal plate spare, in order to be used for the free heat conduction of battery. The end plate piece is provided with the die cavity for the battery monomer carries out the heat that the in-process produced of charging and discharging, not only can dispel the heat through the free big face of battery, also can carry out heat conduction through the die cavity of end plate piece, greatly increased the free heat exchange efficiency of battery like this, make the battery monomer be when the charge and discharge of high multiplying power, be unlikely to that the temperature rises very high, improved free life and the security of battery.

Description

Battery module, power battery pack and electric equipment

Technical Field

The application relates to the technical field of power batteries, in particular to a battery module, a power battery pack and electric equipment.

Background

Energy conservation and emission reduction are key to sustainable development of the automobile industry, and electric vehicles become an important component of sustainable development of the automobile industry due to the energy conservation and environmental protection advantages of the electric vehicles. For electric vehicles, battery technology is an important factor in the development of the electric vehicles.

The lithium ion battery has the advantages of higher energy density, longer cycle life and the like, so that the lithium ion battery has become a main choice of a power device of a new energy automobile. In the charging and discharging process of the lithium ion battery, heat is generated in the battery, and then the heat is gradually diffused and transferred to the outside of the battery, so that the whole temperature of the battery is overhigh, and serious potential safety hazards are caused.

In the prior art, an external cooling mode of air cooling or water cooling is generally adopted to cool the lithium ion battery shell, so that the heat of the battery shell is taken away, and the effect of cooling the battery is achieved. However, the heat inside the battery cannot be rapidly diffused, so that the situation of continuously accumulating heat occurs, the temperature inside the battery is too high, and the service life and the safety of the battery are affected.

Disclosure of Invention

An object of the application is to provide a battery module, power battery package and consumer, can the free heat exchange efficiency of greatly increased battery, improve free life and the security of battery.

In order to achieve the above purpose, the present application adopts the following technical scheme:

in a first aspect, the present application provides a battery module, comprising: the battery cells are provided with large faces distributed along the left-right direction, and the large faces of two adjacent battery cells are connected so that the battery cells are distributed along the front-back direction; the module box body is provided with an end plate and a side plate, the end plate is connected with the side plate to enclose and form a containing cavity for containing the battery monomers, the side plate is arranged at the large surface, the end plate is provided with a cavity distributed along the front-back direction, and the end plate is arranged at the output electrode of the battery monomers to be used for conducting heat of the battery monomers.

In the process of the realization, the left side and the right side of the battery monomer are provided with the output poles, and a plurality of battery monomers are distributed along the front-back direction, when the plurality of battery monomers are arranged in the accommodating cavity of the module box body, the side plate part of the battery monomers is positioned at the large surface of the battery, the end plate part is positioned at the output pole of the battery monomers, and the end plate part is provided with the cavity, so that heat generated in the process of charging and discharging the battery monomers can be dissipated through the large surface of the battery monomers, heat conduction can be carried out through the cavity of the end plate part, the heat exchange efficiency of the battery monomers is greatly improved, and the service life and the safety of the battery monomers are prolonged when the battery monomers are charged and discharged at a large multiplying power.

In some embodiments, the end plate member comprises an end plate body, an upper cover plate and a lower cover plate, wherein the upper cover plate is connected to the upper side of the end plate body, and the lower cover plate is arranged on the lower side of the end plate body, so that the end plate body, the upper cover plate and the lower cover plate enclose to form the cavity, the upper cover plate is provided with a cover plate water inlet and a cover plate water outlet which are communicated with the cavity, and the heights of the cover plate water inlet and the cover plate water outlet are not higher than the height of the end plate body.

In the process of the realization, the upper cover plate and the lower cover plate are connected to the end plate body to enclose and form a cavity for conducting heat to the battery cell, and the water inlet and the water outlet arranged on the upper cover plate are not higher than the upper end of the end plate body, so that after the power battery pack is formed by the battery module, the water inlet and the water outlet cannot occupy the space of the power battery pack along the vertical direction, the space utilization rate is improved, and meanwhile, the cooling liquid in the cavity is also convenient to manage, and the heat dissipation efficiency is improved.

In some embodiments, the end plate body is further provided with mounting holes, the mounting holes are distributed along the up-down direction, and the mounting holes are located at the outer edge of the cavity. Through set up the mounting hole on the end plate body for battery module is when assembling, can realize stacking between the battery module, is favorable to power battery package in the use, and the battery module is more firm, improves the security.

In some embodiments, the front and rear sides of the end plate member are concavely provided with avoidance openings along the direction close to the battery cells, and the left and right sides of the side plate member are provided with extension plates adapted to the avoidance openings.

In the process of the realization, the end plate piece is provided with the avoidance port, and the side plate piece is provided with the extension plate matched with the avoidance port, so that the fixed connection of the side plate piece and the end plate piece is facilitated, the structure of the module box body is more compact and reasonable, and meanwhile, the safety of a plurality of battery monomers connected to the accommodating cavity of the module box body is also ensured.

In some embodiments, the battery module further includes a current collecting member disposed between the end plate member and the battery cell for connection with the output electrode of the battery cell.

In some embodiments, the bus bar component comprises a mounting bracket and a bus bar, wherein the bus bar is connected to one side of the mounting bracket far away from the battery cell, and the bus bar is provided with a connecting port penetrating through the output electrode. Through setting up the busbar on the installing support, and the installing support is located between busbar and the battery monomer, and it not only can play insulating protection's effect, also can guarantee that the busbar is extremely normally connected with the output of battery monomer to realize being connected between the battery monomer, be favorable to battery module's charge and discharge.

In some embodiments, the battery module further includes a first heat conductive member disposed between the current collecting member and the end plate member.

In the process of the realization, through setting up first heat-conducting piece between converging part and end plate for battery monomer is at the heat of charge-discharge's in-process kinking, can give the end plate piece with its heat transfer through first heat-conducting piece, and then the die cavity of end plate piece takes away the heat, realizes the heat conduction to battery monomer, greatly increased battery monomer's heat exchange efficiency, avoided appearing the very high condition of battery monomer temperature rise.

In a second aspect, the present application also provides a power battery pack comprising: a liquid cooling plate having a liquid cooling chamber; and the battery module according to any one of the above claims, wherein the liquid cooling plate is arranged at the upper end of the battery module so as to conduct heat through the cooling liquid in the liquid cooling cavity.

In the process of the realization, the liquid cooling plate is arranged at the upper end of the battery module, so that heat generated in the charging and discharging process of the battery module is partially transferred to the end plate member through the first heat conduction member and is conducted through cooling liquid in the cavity of the end plate member, and the other part of heat can be transferred to the liquid cooling plate to conduct heat, so that the heat exchange efficiency of the battery monomer is greatly improved under the cooperation of the end plate member and the liquid cooling plate, and the situation that the temperature rise of the battery monomer is very high is avoided.

In some embodiments, the upper end of the liquid cooling plate is provided with a liquid cooling water inlet and a liquid cooling water outlet, the lower end of the liquid cooling plate is provided with a connecting pipe orifice, the liquid cooling water inlet, the liquid cooling water outlet and the connecting pipe orifice are all communicated with the liquid cooling cavity, and the connecting pipe orifice is configured to be communicated with the cavity of the battery module.

In the process of the realization, the liquid cooling water inlet, the liquid cooling water outlet and the connecting pipe orifice are arranged on the liquid cooling plate, the connecting pipe orifice is communicated with the cavity of the end plate, so that cooling liquid enters the liquid cooling cavity from the liquid cooling water inlet and then enters the cavity of the end plate through the connecting pipe orifice, heat conduction to the battery monomer is completed, finally, the cooling liquid is discharged from the liquid cooling water outlet, heat conduction to different positions of the battery monomer is realized, and the heat exchange efficiency of the battery monomer is greatly increased.

In some embodiments, the liquid cooling cavity comprises a first liquid cooling sub cavity and a second liquid cooling sub cavity, the first liquid cooling sub cavity and the second liquid cooling sub cavity are communicated with the same side of the liquid cooling plate, the first liquid cooling sub cavity is provided with the liquid cooling water inlet, and the second liquid cooling sub cavity is provided with the liquid cooling water outlet. Through setting the liquid cooling chamber to the first liquid cooling chamber and the second liquid cooling chamber of mutual intercommunication, and be provided with the liquid cooling water inlet on the first liquid cooling chamber, the second liquid cooling chamber is provided with the liquid cooling delivery port, can guarantee the circulation of coolant liquid in the liquid cooling intracavity to realize heat conduction to the battery monomer, also make things convenient for the pipeline setting of liquid cooling board simultaneously, be favorable to the management to the liquid cooling board.

In some embodiments, the power battery pack further includes a second heat conductive member disposed between the liquid cooling plate and the battery module.

In the process of the realization, the second heat conduction piece is arranged between the liquid cooling plate and the battery module, so that the heat generated in the charge and discharge process of the battery module can be transferred to the liquid cooling plate through the second heat conduction piece, and the other part of the heat can be transferred to the end plate through the first heat conduction piece, thereby realizing heat conduction of different positions of the battery cell, greatly increasing heat exchange efficiency of the battery cell, and avoiding the situation that the temperature rise of the battery cell is very high.

In a third aspect, the present application further provides a powered device, including a power battery pack as described in any one of the above.

Because the electric equipment provided by the embodiment of the third aspect of the present application includes the power battery pack according to the second aspect of the present application, all technical effects of the foregoing embodiments are provided, and are not described herein.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the embodiments of the application. The objectives and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and should not be considered as limiting the scope, and that other related drawings can be obtained according to these drawings without inventive effort for the users of the art.

Fig. 1 is a schematic structural view of a battery module according to an embodiment of the present application.

Fig. 2 is a sectional view of a battery module according to an embodiment of the present application.

Fig. 3 is an enlarged partial schematic view of fig. 2.

Fig. 4 is a schematic structural view of an end plate member of a battery module according to an embodiment of the present application.

Fig. 5 is a sectional view of an end plate member of a battery module according to an embodiment of the present application.

Fig. 6 is a schematic structural view of a current collecting member of a battery module according to an embodiment of the present application.

Fig. 7 is a schematic view illustrating a structure of a bus bar of a battery module according to an embodiment of the present disclosure.

Fig. 8 is a schematic structural diagram of a connection between a bus structure and a battery cell of a battery module according to an embodiment of the present disclosure.

Fig. 9 is a schematic structural view of a first heat conductive member of a battery module according to an embodiment of the present application.

Fig. 10 is a schematic structural view of a power battery pack according to an embodiment of the present disclosure.

Fig. 11 is a sectional view A-A of fig. 10.

Fig. 12 is an enlarged partial schematic view of fig. 11.

Fig. 13 is a B-B sectional view of fig. 10.

Fig. 14 is an enlarged partial schematic view of fig. 13.

Fig. 15 is a schematic diagram of a front structure of a liquid cooling plate of a power battery pack according to an embodiment of the present disclosure.

Fig. 16 is a schematic view of a structure of a back surface of a liquid cooling plate of a power battery pack according to an embodiment of the present disclosure.

Fig. 17 is a schematic diagram illustrating connection between a liquid cooling plate and an end plate member of a power battery pack according to an embodiment of the present disclosure.

Fig. 18 is an enlarged partial schematic view of fig. 17.

Fig. 19 is a schematic view showing a part of the structure of a power battery pack according to an embodiment of the present application.

Reference numerals

10. A battery module; 100. a battery cell; 101. an output electrode; 102. side edge sealing; 200. a module case; 201. a terminal plate member; 2011. an end plate body; 2012. an upper cover plate; 2013. a lower cover plate; 2014. a cover plate water inlet; 2015. a cover plate water outlet; 2016. a mounting hole; 2017. an avoidance port; 2018. a cavity; 202. a side plate member; 2021. an extension plate; 300. a confluence member; 301. a busbar; 302. a mounting bracket; 400. a first heat conductive member; 20. a liquid cooling plate; 2000. a liquid cooling cavity; 2001. a first liquid coolant chamber; 2002. a second liquid coolant chamber; 21. a liquid cooling water inlet; 22. a liquid cooling water outlet; 203. a connecting pipe orifice; 204. a second heat conductive member; 205. a battery case; 206. and (5) a bottom guard board.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by a person of ordinary skill in the art based on the embodiments herein, without inventive effort are intended to be within the scope of the present application.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present application, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships that are conventionally put in use of the inventive product, are merely for convenience of description of the present application and simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood to be specific to the user of ordinary skill in the art.

Examples

In recent years, with the tremendous development of new energy industry in China, lithium ion batteries are also rapidly developed, and lithium ions are widely applied to power supply equipment such as new energy electric vehicles, ships and airplanes, however, the application of lithium ions also has a plurality of problems, for example, the lithium ions can generate a large amount of heat in the working process, so that the discharge efficiency of the batteries is reduced, the recycling service life of the batteries is also reduced, and serious safety accidents such as thermal runaway and the like are also generated in serious cases, which are important factors for restricting the development of the lithium batteries.

The maximum temperature and the temperature uniformity in the operation of the lithium battery module are two main factors affecting the performance of the entire battery system. On the one hand, if the battery temperature exceeds the limit temperature, the battery performance may be drastically reduced, and even the battery may be broken and exploded. On the other hand, uneven temperature distribution of the battery pack may cause a decrease in the operating efficiency of the battery and a decrease in the life of the battery for recycling. Therefore, the power lithium battery pack needs to employ a proper cooling device to ensure efficient and stable operation of the battery.

However, in the related art, the cooling of the battery pack mostly cools the battery case, which results in low heat exchange efficiency and continuous heat accumulation of the battery.

In view of this, as shown in fig. 1 to 3, in a first aspect, the present application provides a battery module 10 including: the battery monomer 100 and the module box 200, the battery monomer 100 set up in the module box 200, battery monomer 100 is provided with output utmost point 101, just module box 200 is provided with die cavity 2018, die cavity 2018 is located battery monomer 100 is close to one side of output utmost point 101 for battery monomer 100 carries out the heat that produces in the charge-discharge process can pass through output utmost point 101 transfer for module box 200, the coolant liquid is in after the die cavity 2018 circulate, realizes the heat conduction to battery monomer 100.

Specifically, the plurality of battery cells 100, wherein the battery cells 100 have large surfaces distributed along the left-right direction, and the large surfaces of two adjacent battery cells 100 are connected so that the plurality of battery cells 100 are distributed along the front-rear direction; the module case 200 has an end plate 201 and a side plate 202, the end plate 201 is connected with the side plate 202 to form a receiving cavity for receiving the battery cell 100, the side plate 202 is disposed at the large surface, the end plate 201 has a cavity 2018 distributed along the front-rear direction, and the end plate 201 is disposed at the output electrode 101 of the battery cell 100 to be used for heat conduction of the battery cell 100.

The lengths of the battery cells 100 are distributed along the left-right direction, and foam may be disposed between large faces of two adjacent battery cells 100, where the foam is coated with double faced adhesive tape or the like for fixing with the large faces, so that the rigidity and strength of the overall structure can be enhanced after the battery cells 100 are connected and formed into a whole.

It may be appreciated that the large faces are disposed on the front and rear sides of the battery cell 100, the output poles 101 are disposed on the left and right sides of the battery cell 100, and the output poles 101 may be disposed on the surface of the battery cell 100 in a protruding manner, so that heat generated by the battery cell 100 may be transferred to the end plate 201 through the output poles 101, that is, the end plate 201 is disposed on the left and right sides of the battery cell 100, and the side plate 202 is disposed on the front and rear sides of the battery cell 100.

The battery cell 100 may include a lithium ion secondary battery cell 100, a lithium ion primary battery cell 100, a lithium sulfur battery cell 100, a sodium lithium ion battery cell 100, a sodium ion battery cell 100, or a magnesium ion battery cell 100, which is not limited in the embodiment of the present application.

The battery cell 100 includes an electrode assembly including a positive electrode tab, a negative electrode tab, and a separator, and an electrolyte. The battery cell 100 operates primarily by virtue of metal ions moving between the positive and negative electrode tabs. The positive electrode plate comprises a positive electrode current collector and a positive electrode active material layer, and the positive electrode active material layer is coated on the surface of the positive electrode current collector; the positive current collector comprises a positive current collecting part and a positive lug protruding out of the positive current collecting part, wherein the positive current collecting part is coated with a positive active material layer, and at least part of the positive lug is not coated with the positive active material layer. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, the positive electrode active material layer includes a positive electrode active material, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate or the like. The negative electrode plate comprises a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector; the negative electrode current collector comprises a negative electrode current collecting part and a negative electrode tab protruding from the negative electrode current collecting part, wherein the negative electrode current collecting part is coated with a negative electrode active material layer, and at least part of the negative electrode tab is not coated with the negative electrode active material layer. The material of the anode current collector may be copper, the anode active material layer includes an anode active material, and the anode active material may be carbon or silicon, or the like. The material of the separator may be PP (polypropylene) or PE (polyethylene), etc.

Illustratively, the electrode assembly includes a positive electrode sheet, a negative electrode sheet, and a separator for separating the positive electrode sheet and the negative electrode sheet. The polarity of the positive plate and the polarity of the negative plate are opposite. The positive plate, the negative plate and the separator are all in a strip-shaped structure, and are wound into a whole to form a winding structure. The coiled structure may be a cylindrical structure, a flat structure, or other shaped structure. The electrode assembly includes a main body portion, a positive electrode tab and a negative electrode tab protruding from the main body portion as viewed from the outer shape of the electrode assembly. The positive tab is a portion of the positive electrode sheet where the active material layer is not coated, and the negative tab is a portion of the negative electrode sheet where the active material layer is not coated. The positive electrode tab and the negative electrode tab are used for leading out current in the main body portion.

Optionally, the positive tab is wound in a plurality of turns around a central axis of the electrode assembly, the positive tab including a plurality of turns of tab layer. After winding is completed, the positive electrode lug is in a cylindrical shape, and a gap is reserved between two adjacent ring of electrode lug layers. The embodiment of the application can process the positive electrode lug to reduce the gap between the electrode lug layers, so that the positive electrode lug is convenient to be connected with other conductive structures. For example, the embodiment of the application can carry out the rubbing treatment on the positive electrode lug so as to fold and collect the end area of the positive electrode lug far away from the main body part; the rubbing treatment forms a compact end face at one end of the positive electrode lug far away from the main body part, reduces gaps between the electrode lug layers, and is convenient for connecting the positive electrode lug with other conductive structures. Alternatively, the embodiment of the application can also fill conductive materials between two adjacent rings of tab layers so as to reduce gaps between the tab layers.

Optionally, the negative electrode tab is wound in a plurality of turns around a central axis of the electrode assembly, the negative electrode including a plurality of turns of tab layer. Illustratively, the negative electrode tab is also subjected to a flattening treatment to reduce gaps between the tab layers of the negative electrode tab.

In the process of the implementation, the output poles 101 are arranged on the left side and the right side of the battery monomer 100, and the plurality of battery monomers 100 are distributed along the front-rear direction, when the plurality of battery monomers 100 are arranged in the accommodating cavity of the module box 200, the side plate 202 is positioned at the large surface of the battery monomer 100, the end plate 201 is positioned at the output pole 101 of the battery monomer 100, and the end plate 201 is provided with the cavity 2018, so that heat generated in the process of charging and discharging the battery monomer 100 can be dissipated through the large surface of the battery monomer 100, and heat conduction can be performed through the cavity 2018 of the end plate 201, thus greatly increasing the heat exchange efficiency of the battery monomer 100, preventing the temperature of the battery monomer 100 from rising very high when the battery monomer 100 is charged and discharged at a large rate, and improving the service life and safety of the battery monomer 100.

As shown in fig. 4-5, the end plate 201 includes an end plate body 2011, an upper cover 2012 and a lower cover 2013, the upper cover 2012 is connected to the upper side of the end plate body 2011, the lower cover 2013 is disposed on the lower side of the end plate body 2011, so that the end plate body 2011, the upper cover 2012 and the lower cover 2013 enclose to form the cavity 2018, the upper cover 2012 is provided with a cover water inlet 2014 and a cover water outlet 2015 which are communicated with the cavity 2018, and the heights of the cover water inlet 2014 and the cover water outlet 2015 are not higher than the height of the end plate body 2011. The upper cover plate 2012 and the lower cover plate 2013 may be fixed on the end plate body 2011 by welding, the height of the upper end of the upper cover plate 2012 is lower than that of the upper end of the end plate body 2011, the cover plate water inlet 2014 and the cover plate water outlet 2015 are convexly arranged at the upper end of the upper cover plate 2012, and the heat conduction to the battery cell 100 can be realized through the cover plate water inlet 2014 and the cover plate water outlet 2015 alone, or the cover plate water inlet 2014 and the cover plate water outlet 2015 are connected with the connecting pipe orifice 203 of the liquid cooling plate 20 of the power battery pack, so that the arrangement of a pipeline can be simplified, the cost is saved, and meanwhile, the management of the end plate 201 and the liquid cooling plate 20 is also facilitated.

In the process of the implementation, the upper cover plate 2012 and the lower cover plate 2013 are connected to the end plate body 2011 to enclose and form the cavity 2018 for conducting heat to the battery cell 100, and the water inlet and the water outlet arranged on the upper cover plate 2012 are not higher than the upper end of the end plate body 2011, so that the water inlet and the water outlet do not occupy the space of the power battery pack along the vertical direction after the power battery pack is formed by the battery module 10, the space utilization rate is improved, meanwhile, the cooling liquid in the cavity 2018 is also conveniently managed, and the heat dissipation efficiency is improved.

Referring to fig. 5 again, the end plate body 2011 is further provided with mounting holes 2016, the mounting holes 2016 are distributed along the vertical direction, and the mounting holes 2016 are located at the outer edge of the cavity 2018. Through set up mounting hole 2016 on end plate body 2011 for battery module 10 is when assembling, can realize stacking between the battery module 10, namely battery module 10 can carry out the stack of upper and lower direction, just upward lower ascending battery module 10 can wear to locate through fixing bolt mounting hole 2016, and then realize fixed between the battery module 10 is favorable to power battery package in the use, and battery module 10 is more firm, improves the security.

Referring to fig. 1 and 4, the front and rear sides of the end plate 201 are recessed along the direction approaching the battery cell 100 to form an avoidance opening 2017, the left and right sides of the side plate 202 are provided with an extension plate 2021 adapted to the avoidance opening 2017, specifically, the extension plate 2021 may be fixed to the avoidance opening 2017 by laser welding or the like, and the thickness of the extension plate 2021 may be set to be the same as the recess size of the avoidance opening 2017, so that the surface of the extension plate 2021 is flush with the surface of the end plate 201, which is beneficial to improving the space utilization.

In the process of the implementation, the end plate 201 is provided with the avoiding opening 2017, and the side plate 202 is provided with the extension plate 2021 adapted to the avoiding opening 2017, which is beneficial to the fixed connection between the side plate 202 and the end plate 201, so that the structure of the module box 200 is more compact and reasonable, and meanwhile, the safety of connecting a plurality of battery cells 100 to the accommodating cavity of the module box 200 is ensured.

As shown in fig. 6 to 8, the battery module 10 further includes a current collecting member 300, and the current collecting member 300 is disposed between the end plate 201 and the battery cell 100 for connection with the output electrode 101 of the battery cell 100. The connection modes of two adjacent battery cells 100 may be serial connection or parallel connection, and the bus member 300 includes a mounting bracket 302 and a bus bar 301, where the bus bar 301 is connected to a side of the mounting bracket 302 away from the battery cell 100, and the bus bar 301 has a connection port penetrating the output electrode 101. For example, the bus bar 301 may be provided with a plurality of connection ports along the up-down direction and a plurality of connection ports along the front-back direction, when the output electrode 101 is connected to the bus bar 301, the output electrode 101 is first sequentially inserted into the mounting bracket 302 and the connection ports, and then the output electrode 101 is connected to the bus bar 301 by welding, so as to complete serial-parallel connection between the battery cells 100.

Through setting up busbar 301 on installing support 302, and installing support 302 is located between busbar 301 and battery monomer 100, and it not only can play insulating protection's effect, also can guarantee that busbar 301 and the output pole 101 of battery monomer 100 are normally connected to realize the connection between the battery monomer 100, be favorable to the charge and discharge of battery module 10.

As shown in fig. 9, the battery module 10 further includes a first heat conductive member 400, and the first heat conductive member 400 is disposed between the current collecting member 300 and the end plate 201. The first heat conducting member 400 may be a heat conducting pad, or may be a heat conducting adhesive, and by arranging the first heat conducting member 400 between the converging component 300 and the end plate, heat generated in the battery cell 100 during the charge and discharge process can be transferred to the end plate 201 through the first heat conducting member 400, and then the cavity 2018 of the end plate 201 takes away the heat, so that heat conduction of the battery cell 100 is achieved, heat exchange efficiency of the battery cell 100 is greatly increased, and high temperature rise of the battery cell 100 is avoided.

As shown in fig. 10-14, in a second aspect, the present application further provides a power battery pack, including: a liquid cooling plate 20 having a liquid cooling chamber 2000; and the battery module 10 as described above, the liquid cooling plate 20 is provided at the upper end of the battery module 10 to conduct heat through the cooling liquid in the liquid cooling chamber 2000. Illustratively, the power battery pack further includes a battery housing 205, the battery housing 205 has an assembly cavity, the assembly cavity is configured to accommodate a plurality of the battery modules 10, a plurality of the battery modules 10 may be connected in series, and the battery housing 205 may be used to support the battery modules 10, that is, an inner edge of the assembly cavity is configured as a support plate, the battery modules 10 are disposed on the support plate to support the battery modules 10, wherein the liquid cooling plate 20 is disposed at an upper end of the battery housing 205, and a bottom protection plate 206 may be further disposed at a lower end of the battery housing 205 to form a closed assembly cavity.

In the process of the implementation, the liquid cooling plate 20 is arranged at the upper end of the battery module 10, so that heat generated in the charging and discharging process of the battery module 10 is partially transferred to the end plate 201 through the first heat conduction piece 400 and is conducted through cooling liquid in the cavity 2018 of the end plate 201, and the other part of heat can be transferred to the liquid cooling plate 20, so that the heat exchange efficiency of the battery monomer 100 is greatly improved under the cooperation of the end plate 201 and the liquid cooling plate 20, and the situation that the temperature of the battery monomer 100 is very high is avoided.

As shown in fig. 15-18, the liquid cooling plate 20 is provided with a liquid cooling water inlet 21 and a liquid cooling water outlet 22 at the upper end, a connecting pipe orifice 203 is provided at the lower end, the liquid cooling water inlet 21, the liquid cooling water outlet 22 and the connecting pipe orifice 203 are all communicated with the liquid cooling cavity 2000, the liquid cooling water inlet 21 and the liquid cooling water outlet 22 may be disposed at the same side of the liquid cooling plate 20 or at two opposite sides of the liquid cooling plate 20, and the connecting pipe orifice 203 is configured to be communicated with the cavity 2018 of the battery module 10, that is, one cavity 2018 of the end plate 201 corresponds to two connecting pipe orifices 203, one connecting pipe orifice 203 is connected with the cover plate water inlet 2014, and the other connecting pipe orifice 203 is connected with the cover plate water outlet 2015.

In the implementation process, the liquid cooling plate 20 is provided with the liquid cooling water inlet 21, the liquid cooling water outlet 22 and the connecting pipe orifice 203, the connecting pipe orifice 203 is communicated with the cavity 2018 of the end plate 201, so that cooling liquid enters the liquid cooling cavity 2000 from the liquid cooling water inlet 21, then enters the cavity 2018 of the end plate 201 through the connecting pipe orifice 203, heat conduction to the battery monomer 100 is completed, finally, the cooling liquid is discharged from the liquid cooling water outlet 22, heat conduction to different positions of the battery monomer 100 is realized, and the heat exchange efficiency of the battery monomer 100 is greatly increased.

As shown in fig. 15, the liquid cooling chamber 2000 includes a first liquid cooling chamber 2001 and a second liquid cooling chamber 2002, the first liquid cooling chamber 2001 and the second liquid cooling chamber 2002 are communicated with the same side of the liquid cooling plate 20, the first liquid cooling chamber 2001 is provided with the liquid cooling water inlet 21, the second liquid cooling chamber 2002 is provided with the liquid cooling water outlet 22, and it should be noted that in other embodiments, the first liquid cooling chamber 2001 and the second liquid cooling chamber 2002 may be provided with a plurality of liquid cooling chambers, and specific numbers thereof may be set according to the number of the battery modules 10, which is not described herein. Through setting the liquid cooling chamber 2000 room to the first liquid cooling chamber 2001 and the second liquid cooling chamber 2002 of mutual intercommunication, and be provided with liquid cooling water inlet 21 on the first liquid cooling chamber 2001, second liquid cooling chamber 2002 is provided with liquid cooling delivery port 22, can guarantee the circulation of coolant liquid in liquid cooling chamber 2000 to realize heat conduction to battery monomer 100, also make things convenient for the pipeline setting of liquid cooling board 20 simultaneously, be favorable to the management to liquid cooling board 20.

As shown in fig. 12 and 19, the power battery pack further includes a second heat conductive member 204, and the second heat conductive member 204 is disposed between the liquid cooling plate 20 and the battery module 10. The second heat conducting member 204 may be a heat conducting glue or a heat conducting member, wherein the second heat conducting member 204 is disposed between the liquid cooling plate 20 and the battery module 10, and a side sealing edge 102 is disposed at an upper end of the battery cell 100, so that heat generated in the charging and discharging process of the battery module 10 is partially transferred to the second heat conducting member 204 through the side sealing edge 102, and then the second heat conducting member 204 is transferred to the liquid cooling plate 20; the other part can be transferred to the end plate 201 through the first heat conduction piece 400, so that heat conduction of different positions of the battery cell 100 is realized, the heat exchange efficiency of the battery cell 100 is greatly increased, and the situation that the temperature of the battery cell 100 is high is avoided.

In a third aspect, the present application further provides a powered device, including a power battery pack as described in any one of the above. The electric device may be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, or the like. The vehicle can be a fuel oil vehicle, a fuel gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle; spacecraft including airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete shakers, and electric planers, among others. The embodiment of the application does not limit the electric device in particular. Taking a vehicle as an example, the vehicle may further include a controller and a motor, the controller being configured to control the power pack to power the motor, for example, for operating power requirements during start-up, navigation, and travel of the vehicle.

Because the electric equipment provided by the embodiment of the third aspect of the present application includes the power battery pack according to the second aspect of the present application, all technical effects of the foregoing embodiments are provided, and are not described herein.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims (12)

1. A battery module, comprising:

the battery cells are provided with large faces distributed along the left-right direction, and the large faces of two adjacent battery cells are connected so that the battery cells are distributed along the front-back direction;

the module box body is provided with an end plate and a side plate, the end plate is connected with the side plate to enclose and form a containing cavity for containing the battery monomers, the side plate is arranged at the large surface, the end plate is provided with a cavity distributed along the front-back direction, and the end plate is arranged at the output electrode of the battery monomers to be used for conducting heat of the battery monomers.

2. The battery module according to claim 1, wherein the end plate member comprises an end plate body, an upper cover plate and a lower cover plate, the upper cover plate is connected to the upper side of the end plate body, the lower cover plate is arranged on the lower side of the end plate body, so that the end plate body, the upper cover plate and the lower cover plate enclose to form the cavity, the upper cover plate is provided with a cover plate water inlet and a cover plate water outlet which are communicated with the cavity, and the heights of the cover plate water inlet and the cover plate water outlet are not higher than the height of the end plate body.

3. The battery module according to claim 2, wherein the end plate body is further provided with mounting holes, the mounting holes are distributed in the up-down direction, and the mounting holes are located at the outer edge of the cavity.

4. The battery module according to claim 1, wherein the front and rear sides of the end plate member are each concavely provided with an escape opening along a direction close to the battery cell, and the left and right sides of the side plate member are each provided with an extension plate adapted to the escape opening.

5. The battery module according to claim 1, further comprising a confluence member disposed between the end plate member and the battery cell for connection with an output electrode of the battery cell.

6. The battery module according to claim 5, wherein the bus bar member includes a mounting bracket and a bus bar, the bus bar is connected to a side of the mounting bracket away from the battery cell, and the bus bar has a connection port penetrating the output electrode.

7. The battery module of claim 5, further comprising a first thermally conductive member disposed between the converging member and the end plate member.

8. A power cell pack comprising:

a liquid cooling plate having a liquid cooling chamber; and

the battery module according to any one of claims 1 to 7, wherein the liquid cooling plate is provided at an upper end of the battery module to conduct heat through the cooling liquid in the liquid cooling chamber.

9. The power battery pack according to claim 8, wherein the liquid cooling plate is provided with a liquid cooling water inlet and a liquid cooling water outlet at an upper end thereof, and a connecting pipe orifice at a lower end thereof, the liquid cooling water inlet, the liquid cooling water outlet and the connecting pipe orifice are all communicated with the liquid cooling cavity, and the connecting pipe orifice is configured to be communicated with a cavity of the battery module.

10. The power battery pack according to claim 9, wherein the liquid cooling chamber comprises a first liquid cooling chamber and a second liquid cooling chamber, the first liquid cooling chamber and the second liquid cooling chamber are communicated with the same side of the liquid cooling plate, the liquid cooling water inlet is formed in the first liquid cooling chamber, and the liquid cooling water outlet is formed in the second liquid cooling chamber.

11. The power cell pack of claim 8, further comprising a second thermally conductive member disposed between the liquid cooling plate and the battery module.

12. A powered device comprising a power cell pack as claimed in any one of claims 8 to 11.

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