Battery module, battery pack and electric device

Abstract

The utility model relates to the technical field of batteries, and discloses a battery module, a battery pack and a power utilization device.The battery module comprises a first battery pack, a second battery pack and a cooling plate, the first battery pack comprises a plurality of first battery monomers stacked in the first direction, the second battery pack comprises a plurality of second battery monomers stacked in the first direction, and the cooling plate is arranged in the second direction; the second battery pack and the first battery pack are oppositely arranged, each first battery monomer is provided with a first wall and a second wall which are oppositely arranged along a second direction, the first wall is provided with a first electrode terminal and is far away from the second battery pack compared with the second wall, and the plurality of second walls form a first end surface; each second battery monomer is provided with a third wall and a fourth wall which are oppositely arranged, the third wall is provided with a second electrode terminal and is far away from the first battery pack compared with the fourth wall, the fourth walls form a second end face, and the cooling plate is arranged between the first end face and the second end face in the second direction. Therefore, the utilization rate of the cooling plate is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery module, a battery pack and a power utilization device. BACKGROUND

[0002] With the rapid development of new energy technology, battery packs are widely used in various fields, and battery modules are important components of battery packs. During the charging and discharging process of the battery module, a large amount of heat is generated, and therefore the battery module needs to be cooled.

[0003] In related technologies, a cooling plate is usually used to directly cool the battery module. However, the utilization rate of the cooling plate is low, and it is difficult to fully exert the cooling function of the cooling plate. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a battery module, a battery pack and a power utilization device, which solve the technical problem of low utilization rate of the cooling plate, and are beneficial to further exert the cooling function of the cooling plate in the battery module.

[0005] In order to achieve the above purpose, the main technical scheme adopted by the present application includes:

[0006] In a first aspect, the present application provides a battery module, comprising: a first battery pack, a second battery pack and a cooling plate, the first battery pack comprising a plurality of first battery monomers stacked along a first direction, the second battery pack comprising a plurality of second battery monomers stacked along the first direction, the second battery pack being arranged opposite to the first battery pack along a second direction, wherein the first direction is perpendicular to the second direction;

[0007] Each first battery monomer has a first wall and a second wall arranged opposite to each other along the second direction, the first wall is provided with a first electrode terminal and is farther away from the second battery pack than the second wall, and a plurality of second walls form a first end face;

[0008] Each second battery monomer has a third wall and a fourth wall arranged opposite to each other along the second direction, the third wall is provided with a second electrode terminal and is farther away from the first battery pack than the fourth wall, and a plurality of fourth walls form a second end face;

[0009] The cooling plate is arranged between the first end face and the second end face along the second direction.

[0010] According to the battery module provided by the first aspect of the present application, the cooling plate arranged between the first battery pack and the second battery pack cools the first battery pack and the second battery pack at the same time, realizes the cooling function of a single cooling plate on two battery packs, improves the utilization rate of the cooling plate, can further exert the cooling function of the cooling plate, and can also reduce the number of cooling plates, thereby reducing the cost of the battery module.

[0011] Optionally, each first battery monomer has a fifth wall and a sixth wall oppositely arranged along a third direction, a plurality of fifth walls form a third end face, a plurality of sixth walls form a fourth end face, the first battery group is placed on the bottom wall of the box through the third end face or the fourth end face, wherein the third direction is perpendicular to the first direction and the second direction;

[0012] Each second battery monomer has a seventh wall and an eighth wall oppositely arranged along a third direction, a plurality of seventh walls form a fifth end face, a plurality of eighth walls form a sixth end face, the second battery group is placed on the bottom wall of the box through the fifth end face or the sixth end face.

[0013] Optionally, the first battery group further comprises a first busbar and a first heat insulation piece, a plurality of first walls form a seventh end face, the first busbar is arranged on the seventh end face and electrically connected with a plurality of first electrode terminals in the first battery group, the first heat insulation piece is arranged on a side of the first busbar away from the seventh end face and fixedly connected with the first busbar, and a projection of the first busbar toward the first heat insulation piece along the second direction coincides with the first heat insulation piece;

[0014] The second battery group further comprises a second busbar and a second heat insulation piece, a plurality of third walls form an eighth end face, the second busbar is arranged on the eighth end face and electrically connected with a plurality of second electrode terminals in the second battery group, the second heat insulation piece is arranged on a side of the second busbar away from the eighth end face and fixedly connected with the second busbar, and a projection of the second busbar toward the second heat insulation piece along the second direction coincides with the second heat insulation piece.

[0015] Optionally, the first heat insulation piece has a plurality of first avoiding holes, the plurality of first avoiding holes correspond one-to-one to the plurality of first battery monomers of the first battery group, and each first avoiding hole is oppositely arranged with an explosion-proof valve of the corresponding first battery monomer;

[0016] The second heat insulation piece has a plurality of second avoiding holes, the plurality of second avoiding holes correspond one-to-one to the plurality of second battery monomers of the second battery group, and each second avoiding hole is oppositely arranged with an explosion-proof valve of the corresponding second battery monomer.

[0017] Optionally, the first battery group and the second battery group each comprises an insulating end plate, along the first direction, the first battery group has a ninth end face and a tenth end face oppositely arranged, and the ninth end face and the tenth end face are each covered with the insulating end plate;

[0018] Along the first direction, the second battery group has an eleventh end face and a twelfth end face oppositely arranged, and the eleventh end face and the twelfth end face are each covered with the epoxy end.

[0019] Optionally, the first battery pack and the second battery pack each comprises a glass solder fixing member, along the first direction, the glass solder fixing member is fixedly connected with each of the plurality of first battery cells, and the glass solder fixing member is further used for fixing the insulating end plate of the ninth end face and fixing the insulating end plate of the tenth end face.

[0020] Along the first direction, the glass solder fixing member is fixedly connected with each of the plurality of second battery cells, and the glass solder fixing member is further used for fixing the insulating end plate of the eleventh end face and fixing the insulating end plate of the twelfth end face.

[0021] Optionally, the first battery pack and the second battery pack each comprises a buffer member, along the first direction, the buffer member is arranged between each of two adjacent first battery cells in the first battery pack.

[0022] Along the first direction, the buffer member is arranged between each of two adjacent second battery cells in the second battery pack.

[0023] Optionally, the cooling plate comprises a first plate and a second plate, the first plate has a cooling medium groove, the second plate has a medium inlet and a medium outlet, the first plate and the second plate are fixedly connected to jointly form a cooling medium flow channel with the cooling medium groove, and the medium inlet and the medium outlet are in communication with the cooling medium flow channel.

[0024] In a second aspect, an embodiment of the present application provides a battery pack comprising the battery module in the first aspect.

[0025] According to the battery pack provided in the second aspect of the present application, the first battery pack and the second battery pack are simultaneously cooled by the cooling plate arranged between the first battery pack and the second battery pack, the cooling function of a single cooling plate on two battery packs is realized, the utilization rate of the cooling plate is improved, the cooling function of the cooling plate can be further exerted, and the number of cooling plates can be reduced, thereby reducing the cost of the battery module.

[0026] In a third aspect, an embodiment of the present application provides a power consumption device comprising the battery pack in the second aspect.

[0027] According to the power consumption device provided in the second aspect of the present application, the first battery pack and the second battery pack are simultaneously cooled by the cooling plate arranged between the first battery pack and the second battery pack, the cooling function of a single cooling plate on two battery packs is realized, the utilization rate of the cooling plate is improved, the cooling function of the cooling plate can be further exerted, and the number of cooling plates can be reduced, thereby reducing the cost of the battery module. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments or the prior art. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0029] Figure 1 A perspective view of a battery module is provided for an embodiment of the present application.

[0030] Figure 2 An exploded view of a battery module is provided for an embodiment of the present application.

[0031] Figure 3 An exploded view of a cooling plate is provided for an embodiment of the present application.

[0032]

Explanation of reference signs

[0033] Battery module 100;

[0034] First battery pack 1; first battery cell 11; first wall 111; sixth wall 114; fourth end surface 14; seventh end surface 15; first busbar 16; first heat insulating member 17; first avoiding hole 171; ninth end surface 18;

[0035] Second battery pack 2; second battery cell 21; fourth wall 212; eighth wall 214; second end surface 22; sixth end surface 24; second busbar 26; second heat insulating member 27; second avoiding hole 271; eleventh end surface 28;

[0036] Cooling plate 3; first plate 31; cooling medium groove 311; second plate 32; medium inlet 321; medium outlet 322;

[0037] Insulating end plate 4;

[0038] Glass solder fixing member 5;

[0039] Buffer member 6;

[0040] First direction X; second direction Y; third direction Z. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification herein is for describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, all terms used in disclosing the application, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms used herein should be interpreted as having a meaning that is consistent with their meaning in the context of this specification and the relevant art and will not be interpreted in an idealized or overly literal sense unless expressly so defined by the patentee.

[0043] Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that the described embodiments of the application are merely example structures selected for the purposes of illustration.

[0044] In the description of the application, it is necessary to explain that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "attachment" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0045] The term "and / or" in the application is only to describe the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the application generally represents an "or" relationship between the front and rear associated objects.

[0046] "Multiple" appearing in the application refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0047] With the rapid development of new energy technology, battery packs are widely used in various fields, and battery modules are an important part of battery packs. Therefore, the battery modules need to be cooled during the charging and discharging process.

[0048] In related technologies, cooling plates are usually used to directly cool battery modules. However, currently, cooling plates are usually placed at the bottom of the battery module, that is, the bottom of each battery cell in the battery module contacts the cooling plate to dissipate heat. This setting results in the cooling plate only contacting the battery cell at the top, which leads to low utilization of the cooling plate and makes it difficult to fully exert the cooling function of the cooling plate.

[0049] Based on this, this application proposes a battery module 100, which simultaneously cools the first battery pack 1 and the second battery pack 2 by means of a cooling plate 3 disposed between the first battery pack 1 and the second battery pack 2, thereby realizing the cooling function of a single cooling plate 3 for two battery packs, improving the utilization rate of the cooling plate 3, further enhancing the cooling function of the cooling plate 3, and reducing the number of cooling plates 3, thereby reducing the cost of the battery module 100.

[0050] The battery module 100, battery pack, and power supply device proposed in this application are described below with reference to the accompanying drawings.

[0051] like Figures 1-3 As shown, the battery module 100 according to the first aspect embodiment of this application includes: a first battery pack 1, a second battery pack 2 and a cooling plate 3.

[0052] The first battery pack 1 includes multiple first battery cells 11 stacked along the first direction X, and the second battery pack 2 includes multiple second battery cells 21 stacked along the first direction X. The second battery pack 2 is disposed opposite to the first battery pack 1 along the second direction Y, wherein the first direction X is perpendicular to the second direction Y. Along the second direction Y, each first battery cell 11 has a first wall 111 and a second wall disposed opposite to each other. The first wall 111 is provided with a first electrode terminal and is farther away from the second battery pack 2 than the second wall. The multiple second walls form a first end face. Along the second direction Y, each second battery cell 21 has a third wall and a fourth wall 212 disposed opposite to each other. The third wall is provided with a second electrode terminal and is farther away from the first battery pack 1 than the fourth wall 212. The multiple fourth walls 212 form a second end face 22. Along the second direction Y, a cooling plate 3 is disposed between the first end face and the second end face 22.

[0053] Specifically, the first battery pack 1 includes a plurality of first battery cells 11, and the second battery pack 2 includes a plurality of second battery cells 21. In order to facilitate the sequential stacking of the plurality of first battery cells 11 and the plurality of second battery cells 21, in some embodiments of this application, the first battery cells 11 and the second battery cells 21 can be constructed as rectangles. Of course, the first battery cells 11 and the second battery cells 21 can also be constructed as other shapes, as long as it can ensure that the plurality of first battery cells 11 and the plurality of second battery cells 21 are stacked in sequence. No specific limitation is made here.

[0054] Further, the first battery monomer 11 and the second battery monomer 21 are both configured as a rectangle, and the plurality of first battery monomers 11 in the first battery group 1 are stacked along the first direction X, that is, the thickness direction of the first battery monomer 11, and the plurality of second battery monomers 21 in the second battery group 2 are also stacked along the first direction X, that is, the thickness direction of the second battery monomer 21. Figure 1 and Figure 2 The first direction X is the thickness direction of the first battery monomer 11, that is, the plurality of first battery monomers 11 are stacked along the thickness direction of the first battery monomer 11, and the plurality of second battery monomers 21 in the second battery group 2 are also stacked along the first direction X, that is, the thickness direction of the second battery monomer 21. Figure 1 and Figure 2 The first direction X is the thickness direction of the first battery monomer 11, that is, the plurality of first battery monomers 11 are stacked along the thickness direction of the first battery monomer 11, and the plurality of second battery monomers 21 in the second battery group 2 are also stacked along the first direction X, that is, the thickness direction of the second battery monomer 21.

[0055] It should be noted that along the second direction Y, each first battery monomer 11 has a first wall 111 and a second wall arranged opposite to each other, the first wall 111 is provided with a first electrode terminal and is farther away from the second battery group 2 than the second wall, the first electrode terminal includes a positive pole and a negative pole, that is, the positive and negative poles of the first battery monomer 11 are arranged on the same side, and the first wall 111 is the top wall of the first battery monomer 11, and the second wall is the bottom wall of the first battery monomer 11, and similarly, along the second direction Y, each second battery monomer 21 has a third wall and a fourth wall 212 arranged opposite to each other, the third wall is provided with a second electrode terminal and is farther away from the first battery group 1 than the fourth wall 212, the second electrode terminal includes a positive pole and a negative pole, that is, the positive and negative poles of the second battery monomer 21 are arranged on the same side, and the third wall is the top wall of the second battery monomer 21, and the fourth wall 212 is the bottom wall of the second battery monomer 21.

[0056] Further, continuing to refer to Figure 2As shown, along the first direction X, the plurality of second walls in the plurality of first battery monomers 11 arranged in sequence form a first end face, along the first direction X, the plurality of fourth walls 212 in the plurality of second battery monomers 21 arranged in sequence form a second end face 22, wherein the first end face is arranged opposite to the second end face 22, and the cooling plate 3 is arranged between the first end face and the second end face 22. It can be understood that the cooling plate 3 can be configured as but is not limited to a liquid cooling plate, and a cooling medium flows in the cooling plate 3. The cooling plate 3 can simultaneously cool the plurality of first battery monomers 11 in the first battery pack 1 and the plurality of second battery monomers 21 in the second battery pack 2, that is, the single cooling plate 3 realizes the cooling function of the two battery packs. Along the second direction Y, both sides of the cooling plate 3 can realize the cooling function, and the cooling area of the cooling plate 3 is doubled, thereby improving the utilization rate of the cooling plate 3 and further exerting the cooling function of the cooling plate 3. At the same time, cooling two battery packs by one cooling plate 3 can reduce the number of cooling plates 3 in the battery module 100, which is conducive to reducing the cost of the battery module 100.

[0057] It should be noted that the side of the cooling plate 3 is in contact with the first end face of the first battery pack 1 for cooling, which is equivalent to cooling the bottom wall of each first battery monomer 11. Since the cooling effect of each first battery monomer 11 is improved, similarly, the other side of the cooling plate 3 is in contact with the second end face 22 of the second battery pack 2 for cooling, which is equivalent to cooling the bottom wall of each second battery monomer 21. Since the cooling effect of each second battery monomer 21 is improved.

[0058] In summary, according to the battery module 100 provided by the first aspect of the present application, the cooling plate 3 arranged between the first battery pack 1 and the second battery pack 2 simultaneously cools the first battery pack 1 and the second battery pack 2, realizes the cooling function of the single cooling plate 3 for the two battery packs, improves the utilization rate of the cooling plate 3, further exerts the cooling function of the cooling plate 3, and can also reduce the number of cooling plates 3, thereby reducing the cost of the battery module 100.

[0059] In some embodiments of the present application, as shown in Figure 2 As shown, along the third direction Z, each first battery monomer 11 has oppositely arranged fifth walls and sixth walls 114, a plurality of fifth walls form a third end face, and a plurality of sixth walls 114 form a fourth end face 14. The first battery pack 1 is placed on the bottom wall of the box through the third end face or the fourth end face 14. Wherein the third direction Z is perpendicular to the first direction X and the second direction Y. Along the third direction Z, each second battery monomer 21 has oppositely arranged seventh walls and eighth walls 214, a plurality of seventh walls form a fifth end face, and a plurality of eighth walls 214 form a sixth end face 24. The second battery pack 2 is placed on the bottom wall of the box through the fifth end face or the sixth end face 24.

[0060] Specifically, continue to take an example in which the first battery monomer 11 and the second battery monomer 21 are both configured as a rectangle, as shown in Figure 2 The first battery monomer 11 has four side walls between the first wall 111 (top wall) and the second wall (bottom wall), generally, the four side walls are symmetrically arranged in pairs, and the four side walls are generally divided into two large-area walls and two small-area walls, wherein, in some embodiments of the present application, the first battery monomer 11 has a fifth wall (not shown in the figure) and a sixth wall 114 arranged opposite to each other along the third direction Z, it can be understood that the fifth wall and the sixth wall 114 are both small-area walls, along the first direction X, a plurality of fifth walls in the plurality of first battery monomers 11 arranged in sequence form a third end face (not shown in the figure), and a plurality of sixth walls 114 in the plurality of first battery monomers 11 arranged in sequence form a fourth end face 14.

[0061] Similarly, the second battery monomer 21 has four side walls between the third wall (top wall) and the fourth wall 212 (bottom wall), wherein, in some embodiments of the present application, the second battery monomer 21 has a seventh wall (not shown in the figure) and an eighth wall 214 arranged opposite to each other along the third direction Z, it can be understood that the seventh wall and the eighth wall 214 are both small-area walls, along the first direction X, a plurality of seventh walls in the plurality of second battery monomers 21 arranged in sequence form a fifth end face (not shown in the figure), and a plurality of sixth walls 114 in the plurality of second battery monomers 21 arranged in sequence form a sixth end face 24.

[0062] When the battery module 100 is installed in the box of the battery pack, the first battery group 1 can be placed on the bottom wall of the box through the third end face, or placed on the bottom wall of the box through the fourth end face 14, similarly, the second battery group 2 can be placed on the bottom wall of the box through the fifth end face, or placed on the bottom wall of the box through the sixth end face 24, in some embodiments of the present application, as shown in Figure 2 The first battery group 1 is placed on the bottom wall of the box through the third end face and the second battery group 2 is placed on the bottom wall of the box through the fifth end face, which can realize lateral placement of the first battery group 1 and the second battery group 2, which is beneficial to reduce the height of the battery module 100 in the third direction Z, that is, beneficial to reduce the space occupation of the battery module 100 in the height direction of the vehicle, thereby improving the space utilization of the battery pack, and further improving the energy density of the battery pack.

[0063] In some embodiments of the present application, as shown in Figure 2As shown, the first battery pack 1 further comprises: a first busbar 16 and a first heat insulation member 17, the plurality of first walls 111 of the plurality of first battery cells 11 form a seventh end surface 15, the first busbar 16 is arranged on the seventh end surface 15, and the first busbar 16 is electrically connected with the plurality of first electrode terminals in the first battery pack 1, the first heat insulation member 17 is arranged on a side of the first busbar 16 away from the seventh end surface 15 and is fixedly connected with the first busbar 16, and a projection of the first busbar 16 toward the first heat insulation member 17 along the second direction Y coincides with the first heat insulation member 17.

[0064] Specifically, along the first direction X, the plurality of first walls 111 of the plurality of first battery cells 11 arranged in sequence form the seventh end surface 15, and the first busbar 16 is fixedly installed on the seventh end surface 15, and the installation manner includes but is not limited to bonding, clamping and the like. Further, the first electrode terminal of each first battery cell 11 includes a positive pole and a negative pole, and the first busbar 16 is used to electrically connect the positive pole and the negative pole of the plurality of first battery cells 11 arranged in sequence. For example, the first battery pack 1 includes 12 first battery cells 11, and the first busbar 16 sequentially connects the positive pole of the first first battery cell 11, the negative pole of the first first battery cell 11, the positive pole of the second first battery cell 11, the negative pole of the second first battery cell 11, the positive pole of the third first battery cell 11, the negative pole of the third first battery cell 11, the positive pole of the eleventh first battery cell 11, the negative pole of the eleventh first battery cell 11, the positive pole of the twelfth first battery cell 11, and the negative pole of the twelfth first battery cell 11, thereby realizing the series connection of the plurality of first battery cells 11. Further, after the first busbar 16 is installed, the first heat insulation member 17 is arranged on a side of the first busbar 16 away from the seventh end surface 15 and is fixedly connected with the first busbar 16, and the fixed connection manner includes but is not limited to bonding. At the same time, it is necessary to ensure that the projection of the first busbar 16 toward the first heat insulation member 17 coincides with the first heat insulation member 17, that is, the first heat insulation member 17 can completely cover and shield the first busbar 16.

[0065] In some embodiments of the present application, as shown in Figure 2 and Figure 1 The first heat insulation member 17 can be configured as a rectangular ceramic silica gel plate, or can be configured in other shapes, which are not specifically limited here. As a specific example, the first heat insulation member 17 can be made of ceramic silica gel material, which can control the temperature of 700-900°C. In this way, since the first heat insulation member 17 has good heat insulation and fireproof effect, it is beneficial to strengthen the thermal runaway protection function of the first battery pack 1.

[0066] Similarly, the second battery pack 2 also comprises: a second busbar 26 and a second heat insulation piece 27, a plurality of third walls (not shown in the figure) form an eighth end face, the second busbar 26 is arranged at the eighth end face, and the second busbar 26 is electrically connected with a plurality of second electrode terminals in the second battery pack 2, the second heat insulation piece 27 is arranged at a side of the second busbar 26 away from the eighth end face and is fixedly connected with the second busbar 26, and a projection of the second busbar 26 toward the second heat insulation piece 27 coincides with the second heat insulation piece 27 along the second direction Y.

[0067] It should be noted that the second busbar 26 and the second heat insulation piece 27 in the second battery pack 2 have the same structure and function as the first busbar 16 and the first heat insulation piece 17 in the first battery pack 1, and as a specific example, the second heat insulation piece 27 can also be made of ceramic silica gel material, so that the heat runaway protection function of the second battery pack 2 is improved through the second heat insulation piece 27, which will not be described here.

[0068] In summary, by arranging the first heat insulation piece 17 in the first battery pack 1 and the second heat insulation piece 27 in the second battery pack 2 respectively, the heat runaway protection function of the battery module 100 is improved.

[0069] In some embodiments of the present application, as shown in Figure 2 and Figure 1 The first heat insulation piece 17 has a plurality of first avoiding holes 171 corresponding to the plurality of first battery monomers 11 in the first battery pack 1, and each first avoiding hole 171 is arranged opposite to the explosion-proof valve of the corresponding first battery monomer 11, and the second heat insulation piece 27 has a plurality of second avoiding holes 271 corresponding to the plurality of second battery monomers 21 in the second battery pack 2, and each second avoiding hole 271 is arranged opposite to the explosion-proof valve of the corresponding second battery monomer 21.

[0070] Specifically, the first heat insulation piece 17 can be provided with a plurality of first avoiding holes 171 corresponding to the first battery monomers 11, wherein each first avoiding hole 171 is arranged opposite to the explosion-proof valve of the corresponding first battery monomer 11, as an example, the first avoiding hole 171 can be a circular hole or a square hole, the first avoiding hole 171 matches the shape of the explosion-proof valve of the first battery monomer 11, and the size of the first avoiding hole 171 can be greater than or equal to the outlet size of the explosion-proof valve of the first battery monomer 11, so as to ensure that the outlet of the explosion-proof valve of the first battery monomer 11 is not blocked by the first avoiding hole 171, so that the first avoiding hole 171 can act as a pressure relief hole when the explosion-proof valve of the first battery monomer 11 works, thereby further improving the heat runaway protection function of the first battery pack 1.

[0071] Similarly, the second thermal insulation member 27 can be provided with a plurality of second avoiding holes 271 corresponding to the second battery monomers 21, wherein each second avoiding hole 271 is arranged opposite to the explosion-proof valve of the corresponding second battery monomer 21. As an example, the second avoiding hole 271 can be a circular hole or a square hole. The second avoiding hole 271 matches the shape of the explosion-proof valve of the second battery monomer 21. The size of the second avoiding hole 271 can be greater than or equal to the outlet size of the explosion-proof valve of the second battery monomer 21, so as to ensure that the outlet of the explosion-proof valve of the second battery monomer 21 is not blocked by the second avoiding hole 271. In this way, the second avoiding hole 271 can act as a pressure relief hole when the explosion-proof valve of the second battery monomer 21 works, thereby facilitating further improvement of the thermal runaway protection function of the second battery pack 2.

[0072] In summary, by arranging the first avoiding hole 171 opposite to the explosion-proof valve of the first battery monomer 11 on the first thermal insulation member 17 and arranging the second avoiding hole 271 opposite to the explosion-proof valve of the second battery monomer 21 on the second thermal insulation member 27, the normal pressure relief of the first battery monomer 11 and the second battery monomer 21 can be ensured, and the thermal runaway protection function of the battery module 100 can be further improved.

[0073] In some embodiments of the present application, as shown in Figure 2 and Figure 1 The first battery pack 1 and the second battery pack 2 each include an insulating end plate 4. In the first direction X, the first battery pack 1 has a ninth end face 18 and a tenth end face (not shown in the figure), and both the ninth end face 18 and the tenth end face are covered with the insulating end plate 4. In the first direction X, the second battery pack 2 has an eleventh end face 28 and a twelfth end face (not shown in the figure), and both the eleventh end face 28 and the twelfth end face are covered with the insulating end plate.

[0074] Specifically, continue to take the example that the first battery monomer 11 and the second battery monomer 21 are both configured as a rectangle, along the second direction Y, each first battery monomer 11 has oppositely arranged ninth and tenth walls, it can be understood that the ninth and tenth walls are large area walls relative to the fifth and sixth walls 114, when the plurality of first battery monomers 11 are sequentially stacked along the first direction X, assuming that the ninth wall of the first first battery monomer 11 in the plurality of first battery monomers 11 is the ninth end face 18, then the tenth wall of the last first battery monomer 11 in the plurality of first battery monomers 11 is the tenth end face; similarly, along the second direction Y, each second battery monomer 21 has oppositely arranged eleventh and twelfth walls, it can be understood that the eleventh and twelfth walls are large area walls relative to the seventh and eighth walls 214, when the plurality of second battery monomers 21 are sequentially stacked along the first direction X, assuming that the eleventh wall of the first second battery monomer 21 in the plurality of second battery monomers 21 is the eleventh end face 28, then the twelfth wall of the last first battery monomer 11 in the plurality of second battery monomers 21 is the twelfth end face.

[0075] Further, as shown in the drawings, Figure 2 along the first direction X, the first battery pack 1 is provided with two insulating end plates 4 on both sides, one of which is fixedly installed on and covers the ninth end face 18, and the other is fixedly installed on and covers the tenth end face, similarly, along the first direction X, the second battery pack 2 is also provided with two insulating end plates 4 on both sides, one of which is fixedly installed on and covers the eleventh end face 28, and the other is fixedly installed on and covers the twelfth end face, for example, the insulating end plate 4 can adopt but is not limited to epoxy material and the like. In this way, compared with the traditional die-cast aluminum plate, the insulating end plate 4 as an insulating material can prevent the battery monomers on both sides from thermal runaway and connection with the beam in the battery pack, avoiding further thermal runaway.

[0076] In some embodiments of the present application, as shown in the drawings, Figure 2 and Figure 1 the first battery pack 1 and the second battery pack 2 each include a glass solder fixing piece 5, along the first direction X, the glass solder fixing piece 5 is fixedly connected with the plurality of first battery monomers 11, and the glass solder fixing piece 5 is also used to fix the insulating end plate 4 of the ninth end face 18 and the insulating end plate 4 of the tenth end face, along the first direction X, the glass solder fixing piece 5 is fixedly connected with the plurality of second battery monomers 21, and the glass solder fixing piece 5 is also used to fix the insulating end plate 4 of the eleventh end face 28 and the insulating end plate 4 of the twelfth end face.

[0077] Specifically, the glass solder fixing member 5 is used for fixing the plurality of first battery monomers 11 in the first battery group 1. For example, the glass solder fixing member 5 can be configured as a glass solder tape. Two glass solder tapes can be symmetrically arranged in the third direction Z to bond the plurality of first battery monomers 11 in the first battery group 1 and the insulating end plates 4 on both sides of the first battery group 1. Of course, four glass solder tapes, six glass solder tapes, etc. can also be used. When the number of stacked first battery monomers 11 needs to be increased, the length of the glass solder tape can be adjusted as needed to adapt to the length of the first battery group 1 in the first direction X.

[0078] Similarly, the glass solder fixing member 5 is also used for fixing the plurality of first battery monomers 11 in the second battery group 2. Therefore, two glass solder tapes can be symmetrically arranged in the third direction Z to bond the plurality of second battery monomers 21 in the second battery group 2 and the insulating end plates 4 on both sides of the second battery group 2. When the number of stacked second battery monomers 21 needs to be increased, the length of the glass solder tape can be adjusted as needed to adapt to the length of the second battery group 2 in the first direction X.

[0079] In this way, the control of the battery module 100 in the first direction X is facilitated, and the size of the battery module 100 in the first direction X can be effectively controlled as needed, facilitating the in-box assembly of the battery module 100.

[0080] In some embodiments of the present application, as shown in Figure 2 The first battery group 1 and the second battery group 2 each include a buffer member 6. In the first battery group 1, the buffer member 6 is arranged between adjacent two first battery monomers 11 in the first direction X. In the second battery group 2, the buffer member 6 is arranged between adjacent two second battery monomers 21 in the first direction X.

[0081] Specifically, since the battery monomers will expand due to heat, in order to prevent expansion and extrusion between adjacent battery monomers, the buffer member 6 is arranged between adjacent two first battery monomers 11 in the first battery group 1 and between adjacent two second battery monomers 21 in the second battery group 2. It can be understood that the buffer member 6 can be selected from, but is not limited to, a polypropylene microcellular foam material, as shown in Figure 2 The buffer member 6 can be configured as a frame structure. Of course, the buffer member 6 can also be configured as other shapes, which are not specifically limited here. In this way, the expansion force between adjacent battery monomers is borne by the buffer member 6, which can reduce the risk of damage caused by extrusion of the battery monomers.

[0082] In some embodiments of the present application, as shown in Figure 2 Figure 3As shown, the cooling plate 3 comprises a first plate 31 having a cooling medium groove 311 and a second plate 32 having a medium inlet 321 and a medium outlet 322, the first plate 31 and the second plate 32 are fixedly connected to jointly form a cooling medium flow channel with the cooling medium groove 311 and the second plate 32, wherein the medium inlet 321 and the medium outlet 322 are in communication with the cooling medium flow channel.

[0083] Specifically, the first plate 31 has a cooling medium groove 311 recessed towards the inside of the first plate 31, and the second plate 32 has a medium inlet 321 and a medium outlet 322, it can be understood that the medium inlet 321 and the medium outlet 322 pass through the second plate 32, further, the first plate 31 and the second plate 32 are both configured as rectangular plates, the second plate 32 is arranged on the cooling medium groove 311 of the first plate 31 and fixedly connected to the first plate 31 to jointly form a cooling medium flow channel with the cooling medium groove 311 and the second plate 32, wherein the fixed connection between the second plate 32 and the first plate 31 includes but is not limited to welding, it should be noted that at least part of the medium inlet 321 and the medium outlet 322 are arranged opposite to the cooling medium groove 311, so that the medium inlet 321 and the medium outlet 322 are in communication with the cooling medium flow channel, when the cooling medium is transported to the medium inlet 321, the cooling medium enters the cooling medium flow channel and flows out from the medium outlet 322, thereby forming a complete cooling cycle in the cooling plate 3, the circulating cooling medium can carry away the heat of the battery module 100, thereby realizing continuous cooling of the battery module 100.

[0084] The battery pack according to the second aspect of the present application comprises the battery module 100 according to the first aspect of the present application.

[0085] The battery pack according to the second aspect of the present application comprises the battery module 100 according to the first aspect of the present application.

[0086] The battery pack according to the second aspect of the present application comprises the battery module 100 according to the first aspect of the present application.

[0087] According to the second aspect of the present application, the power utilization device is provided with the battery pack, the cooling plate 3 arranged between the first battery pack 1 and the second battery pack 2 cools the first battery pack 1 and the second battery pack 2 at the same time, the cooling function of the cooling plate 3 on two battery packs is realized, the utilization rate of the cooling plate 3 is improved, the cooling function of the cooling plate 3 can be further exerted, and the number of the cooling plate 3 can be reduced, so that the cost of the battery module 100 is reduced.

[0088] It should also be noted that the terms "comprising", "containing", or any other similar term means inclusion of non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0089] Each of the embodiments in the specification is described in a progressive manner, and the same or similar parts between each embodiment can be referred to each other, and each embodiment mainly describes the difference from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the related parts can refer to the part of the method embodiment.

[0090] The above only describes the embodiments of the present application and does not limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the scope of claims of the present application.

[0091] Although the embodiments of the present application are described in conjunction with the drawings, those skilled in the art can make various modifications and changes without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.

Claims

1. A battery module, characterized in that, include: The battery pack comprises a first battery pack, a second battery pack, and a cooling plate. The first battery pack includes a plurality of first battery cells stacked along a first direction. The second battery pack includes a plurality of second battery cells stacked along the first direction. The second battery pack is disposed opposite to the first battery pack along a second direction, wherein the first direction is perpendicular to the second direction. Along the second direction, each of the first battery cells has a first wall and a second wall disposed opposite to each other, the first wall being provided with a first electrode terminal and being farther away from the second battery pack than the second wall, and a plurality of the second walls forming a first end face; Along the second direction, each of the second battery cells has a third wall and a fourth wall disposed opposite to each other, the third wall being provided with a second electrode terminal and being farther away from the first battery pack than the fourth wall, and the plurality of the fourth walls forming a second end face; Along the second direction, the cooling plate is disposed between the first end face and the second end face.

2. The battery module according to claim 1, characterized in that, Along a third direction, each of the first battery cells has a fifth wall and a sixth wall that are disposed opposite to each other. A plurality of the fifth walls form a third end face, and a plurality of the sixth walls form a fourth end face. The first battery pack is placed on the bottom wall of the housing through the third end face or the fourth end face, wherein the third direction is perpendicular to both the first direction and the second direction. Along a third direction, each of the second battery cells has a seventh wall and an eighth wall that are disposed opposite to each other, a plurality of the seventh walls form a fifth end face, a plurality of the eighth walls form a sixth end face, and the second battery pack is placed on the bottom wall of the housing through the fifth end face or the sixth end face.

3. The battery module according to claim 1, characterized in that, The first battery pack further includes: a first busbar and a first heat insulation member, a plurality of first walls forming a seventh end face, the first busbar being disposed on the seventh end face and electrically connected to a plurality of first electrode terminals in the first battery pack, the first heat insulation member being disposed on the side of the first busbar away from the seventh end face and fixedly connected to the first busbar, and along the second direction, the projection of the first busbar toward the first heat insulation member coincides with the first heat insulation member; The second battery pack further includes: a second busbar and a second heat insulation member, a plurality of the third walls forming an eighth end face, the second busbar being disposed on the eighth end face and electrically connected to a plurality of the second electrode terminals in the second battery pack, the second heat insulation member being disposed on the side of the second busbar away from the eighth end face and fixedly connected to the second busbar, and along the second direction, the projection of the second busbar toward the second heat insulation member coincides with the second heat insulation member.

4. The battery module according to claim 3, characterized in that, The first heat insulation component has a plurality of first clearance holes, each of which corresponds one-to-one with a plurality of first battery cells of the first battery pack, and each first clearance hole is disposed opposite to the explosion-proof valve of the corresponding first battery cell. The second heat insulation component has a plurality of second clearance holes, each of which corresponds one-to-one with a plurality of second battery cells of the second battery pack, and each second clearance hole is disposed opposite to the explosion-proof valve of the corresponding second battery cell.

5. The battery module according to claim 1, characterized in that, Both the first battery pack and the second battery pack include an insulating end plate. Along the first direction, the first battery pack has a ninth end face and a tenth end face that are disposed opposite to each other, and the insulating end plate is covered by the ninth end face and the tenth end face. Along the first direction, the second battery pack has an eleventh end face and a twelfth end face that are disposed opposite to each other, and both the eleventh end face and the twelfth end face are covered with the epoxy end.

6. The battery module according to claim 5, characterized in that, Both the first battery pack and the second battery pack include: a glass fiber fixing member. Along the first direction, the glass fiber fixing member is fixedly connected to a plurality of the first battery cells. The glass fiber fixing member is also used to fix the insulating end plate of the ninth end face and the insulating end plate of the tenth end face. Along the first direction, the glass fiber fixing member is fixedly connected to a plurality of second battery cells, and the glass fiber fixing member is also used to fix the insulating end plate of the eleventh end face and the insulating end plate of the twelfth end face.

7. The battery module according to claim 1, characterized in that, Both the first battery pack and the second battery pack include a buffer element, and the buffer element is provided between two adjacent first battery cells in the first battery pack along the first direction. Along the first direction, the buffer is provided between each two adjacent second battery cells in the second battery pack.

8. The battery module according to claim 1, characterized in that, The cooling plate includes a first plate and a second plate. The first plate has a cooling medium tank, and the second plate has a medium inlet and a medium outlet. The first plate and the second plate are fixedly connected so that the cooling medium tank and the second plate together form a cooling medium flow channel. The medium inlet and the medium outlet are both connected to the cooling medium flow channel.

9. A battery pack, characterized in that, Includes the battery module according to any one of claims 1-8.

10. An electrical appliance, characterized in that, Includes the battery pack according to claim 9.

Images