Battery module and electric device

Abstract

The utility model embodiment provides a kind of battery module and electric equipment. The battery module includes: electric core subassembly and bottom support, electric core subassembly includes multiple electric core monomer, electric core subassembly is set on bottom support, and the surface of bottom support towards electric core subassembly is provided with multiple interval setting insulation support strip, at least one group in first side group and second side group and insulation support strip abuts, the surface of electric core monomer towards bottom support in first side group is two edges opposite in first direction, and the surface of electric core monomer towards bottom support in second side group is two edges opposite in second direction.Wherein, the dimension value of insulation support strip in third direction is greater than the flatness value of electric core subassembly in third direction towards the surface of bottom support.

Description

Technical Field

[0001] This utility model relates to the field of battery production technology, and in particular to a battery module and electrical equipment. Background Technology

[0002] In battery modules, the bottom is typically coated with thermally conductive adhesive. This adhesive serves to conduct heat and provides adhesion, ensuring the module's impact resistance along the Z-axis. However, due to manufacturing limitations, insufficient flatness at the bottom of the battery module can prevent the proper application of the thermally conductive adhesive, potentially leading to insufficient adhesion and Z-axis vibration and impact failure. Utility Model Content

[0003] To solve or partially solve the above problems, this utility model discloses a battery module and electrical equipment to address the problem in the prior art where battery modules are prone to Z-axis vibration and impact failure due to insufficient adhesion of thermally conductive adhesive.

[0004] To address the aforementioned problems, in a first aspect, a battery module is provided, having intersecting first, second, and third directions, wherein the battery module comprises: Battery cell assembly, the battery cell assembly comprising multiple individual battery cells; A bottom support member is provided, on which the battery cell assembly is disposed. A plurality of spaced insulating support strips are provided on the surface of the bottom support member facing the battery cell assembly. Each battery cell has a first side group and a second side group on its surface facing the bottom support member. At least one of the first side group and the second side group abuts against the insulating support strip. The first side group consists of two opposite edges of the surface of the battery cell facing the bottom support member in a first direction, and the second side group consists of two opposite edges of the surface of the battery cell facing the bottom support member in a second direction. The dimension of the insulating support strip in the third direction is greater than the flatness value of the surface of the battery cell assembly facing the bottom support in the third direction.

[0005] Optionally, a filling cavity is formed between the plurality of insulating support strips and the bottom support member; The battery cell assembly and the bottom support are bonded together with thermally conductive adhesive, and the thermally conductive adhesive fills the cavity.

[0006] Optionally, a plurality of the insulating support strips extend along the first direction, and each two adjacent insulating support strips abut against the second side group.

[0007] Optionally, a plurality of the insulating support strips extend along the second direction, and each pair of adjacent insulating support strips abuts against the first side group.

[0008] Optionally, the plurality of insulating support strips may include a plurality of first support strips and a plurality of second support strips; Multiple first support bars extend along the first direction, multiple second support bars extend along the second direction, and the multiple first support bars and multiple second support bars intersect to form a grid structure. The first support bars abut against the second side group, and the second support bars abut against the first side group.

[0009] Optionally, multiple first support bars and multiple second support bars intersect to form multiple support frames arranged in a matrix; At least a portion of the frame structure of the support frame is projected along the first direction into the orthographic projection of the individual battery cell along the first direction.

[0010] Optionally, the dimension of the first support bar in the second direction (Y) and the dimension of the second support bar in the first direction (X) are both greater than or equal to 0.2 mm and less than or equal to 0.5 mm. Optionally, the flatness value of the surface of the cell assembly facing the bottom support in the third direction is less than or equal to 1 mm.

[0011] Optionally, the dimension of the insulating support strip in the third direction is greater than 1 mm and less than or equal to 2 mm.

[0012] Optionally, the bottom support is a shell structure with an opening, the inner cavity of the bottom support forms a mounting cavity, and the battery cell assembly is at least partially located in the mounting cavity.

[0013] Optionally, the insulating support strip is located on the bottom wall of the inner cavity of the bottom support.

[0014] Optionally, the battery module further includes an insulating film layer located between the side wall of the inner cavity of the bottom support and the cell assembly.

[0015] Optionally, the battery module includes a first end plate and a second end plate; The bottom support has a first boss and a second boss disposed opposite to each other at the edge position in the first direction, the first end plate is connected to the first boss, and the second end plate is connected to the second boss.

[0016] Optionally, the dimensions of the first boss in the third direction and the second boss in the third direction are both less than or equal to the dimensions of the insulating support strip in the third direction.

[0017] Secondly, embodiments of this application also provide an electrical device, which includes the battery module described in any of the above embodiments.

[0018] As can be seen from the above embodiments, in this application embodiment, since the battery cell assembly is disposed on the bottom support member, and the surface of the bottom support member facing the battery cell assembly is provided with a plurality of spaced insulating support strips, each battery cell has a first side group and a second side group on the surface facing the bottom support member, at least one of the first side group and the second side group abuts against the insulating support strip. The first side group consists of two opposite edges of the surface of the battery cell facing the bottom support member in a first direction, and the second side group consists of two opposite edges of the surface of the battery cell facing the bottom support member in a second direction. Therefore, at least one set of opposite edges of the surface of the battery cell facing the bottom support member is abutted by the insulating support strip, so that there is an insulating support strip between the battery cell and the bottom support member. Therefore, the battery cell can avoid direct contact with the bottom support member, and short circuit between the battery cell assembly and the bottom support member can be avoided. Furthermore, since the dimension of the insulating support strip in the third direction is greater than the flatness value of the surface of the battery cell assembly facing the bottom support in the third direction, the insulating support strip can compensate for the flatness of the surface of the battery cell assembly facing the bottom support in the third direction. This makes it easier to apply thermally conductive adhesive in the cavity formed by the insulating support strip, thus preventing the battery cell assembly from failing due to insufficient adhesion of the thermally conductive adhesive and Z-axis vibration impact. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a battery module provided in an embodiment of this application; Figure 2 This is a top view of a bottom support member included in a battery module according to an embodiment of this application; Figure 3 This is an isometric view of the bottom support member included in a battery module provided in an embodiment of this application.

[0021] Explanation of reference numerals in the attached figures: 1: Battery cell assembly; 11: Individual battery cell; 111: First side group; 112: Second side group; 2: Bottom support; 21: Insulating support strip; 22: Filling cavity; 23: First boss; 24: Second boss; 3: First end plate; 4: Second end plate; 5: Insulating film layer. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0024] like Figures 1 to 3 As shown, this application embodiment provides a battery module having intersecting first directions X, second directions Y, and third directions Z. The battery module includes: Battery cell assembly 1, which includes multiple individual battery cells 11.

[0025] A bottom support member 2 is provided, and a battery cell assembly 1 is disposed on the bottom support member 2. A plurality of spaced insulating support strips 21 are provided on the surface of the bottom support member 2 facing the battery cell assembly 1. Each battery cell 11 has a first side group 111 and a second side group 112 on the surface facing the bottom support member 2. At least one of the first side group 111 and the second side group 112 abuts against the insulating support strip 21. The first side group 111 consists of two opposite edges of the surface of the battery cell 11 facing the bottom support member 2 in the first direction X, and the second side group 112 consists of two opposite edges of the surface of the battery cell 11 facing the bottom support member 2 in the second direction Y.

[0026] Among them, the dimension of the insulating support strip 21 in the third direction Z is greater than the flatness value of the surface of the cell assembly 1 facing the bottom support 2 in the third direction Z.

[0027] As can be seen from the above embodiments, in this application embodiment, since the battery cell assembly 1 is disposed on the bottom support member 2, and the bottom support member 2 has a plurality of spaced insulating support strips 21 disposed on the surface of the battery cell assembly 1, each battery cell 11 has a first side group 111 and a second side group 112 on the surface of the battery cell 11 facing the bottom support member 2. At least one of the first side group 111 and the second side group 112 abuts against the insulating support strip 21. The first side group 111 consists of two opposite edges of the surface of the battery cell 11 facing the bottom support member 2 in the first direction X, and the second side group 112 consists of two opposite edges of the surface of the battery cell 11 facing the bottom support member 2 in the second direction Y. Therefore, at least one set of opposite edges of the surface of the battery cell 11 facing the bottom support member 2 is abutted by the insulating support strip 21, so that there is an insulating support strip 21 between the battery cell 11 and the bottom support member 2. Therefore, the battery cell 11 can avoid direct contact with the bottom support member 2, and short circuit between the battery cell assembly 1 and the bottom support member 2 can be avoided. Furthermore, since the dimension of the insulating support strip 21 in the third direction Z is greater than the flatness value of the surface of the battery cell assembly 1 facing the bottom support member 2 in the third direction Z, the insulating support strip 21 can compensate for the flatness of the surface of the battery cell assembly 1 facing the bottom support member 2 in the third direction Z. This facilitates the application of thermally conductive adhesive in the cavity formed by the insulating support strip 21, and prevents the battery cell assembly 1 from failing due to insufficient adhesion of the thermally conductive adhesive and resulting in Z-axis vibration and impact failure.

[0028] In the above embodiments, the cell assembly is the most basic energy unit in the battery module. Multiple individual cells 11 are combined in series (to increase voltage) or in parallel (to increase capacity) to form the cell assembly 1. The cell assembly 1 also includes conductive connectors (such as aluminum-nickel composite busbars), insulating materials, and fixing brackets to ensure stable connection between the individual cells 11.

[0029] The bottom support 2 is mainly used to protect and support the battery cell assembly 1, enhance the structural strength, and ensure sealing performance. The bottom support 2 can be made of materials such as aluminum alloy and high-strength plastic. At the same time, the bottom support 2 also has a connection structure to connect with the shell and end plate.

[0030] To ensure insulation between the bottom support member 2 and the cell assembly 1, a plurality of spaced insulating support strips 21 are provided on the surface of the bottom support member 2 facing the cell assembly 1, thereby isolating the bottom support member 2 and the cell assembly 1. It should be noted that the insulating support strips 21 can extend along a first direction X, a second direction Y, or both, forming a mesh structure. This embodiment does not limit this. When the insulating support strips 21 extend along the first direction X, each adjacent pair of insulating support strips 21 abuts against the second side group 112. When the insulating support strips 21 extend along the second direction Y, each adjacent pair of insulating support strips 21 abuts against the first side group 111. When the insulating support strips 21 extend along both the first and second directions Y, each pair abuts against both the first and second side groups 111 and the second side group 112. In short, the insulating support strip 21 abuts against at least one side of each cell 11 opposite to the first direction X or the second direction Y.

[0031] Furthermore, the flatness value of the surface of the battery cell assembly 1 facing the bottom support 2 in the third direction Z is the deviation value of the unevenness height of the surface of the battery cell assembly 1 facing the bottom support 2 in the third direction Z relative to the ideal plane. In other words, the flatness value of the surface of the battery cell assembly 1 facing the bottom support 2 in the third direction Z is the deviation value between the maximum and minimum values ​​of the distance between the surface of the battery cell assembly 1 facing the bottom support 2 in the third direction Z and the bottom support 2. In this way, when the dimension of the insulating support strip 21 in the third direction Z is greater than the flatness value of the surface of the battery cell assembly 1 facing the bottom support 2 in the third direction Z, the thermally conductive adhesive filled between the insulating support strips 21 can ensure that the distance between the surface of the battery cell assembly 1 facing the bottom support 2 in the third direction Z and the bottom support 2 is equal, so as to ensure that the battery cell assembly 1 does not deviate in the Z-axis.

[0032] It should be noted that, according to Figure 3In this embodiment of the invention, the X-axis and Z-axis intersect, the X-axis and Y-axis intersect, and the Y-axis and Z-axis intersect. For ease of explanation, the first direction is defined as the X-axis, the second direction as the Y-axis, and the third direction as the Z-axis. It should be further noted that the definition of intersection in the specification, fluctuating by 10% within 90 degrees, should be understood as perpendicular. That is, the angle between the defined first and second directions, and the angle between the defined first and third directions, should be understood as intersecting within 80 to 90 degrees. In some embodiments, the X-axis and Y-axis are preferably perpendicular, the Y-axis and Z-axis are preferably perpendicular, and the X-axis and Z-axis are preferably perpendicular.

[0033] In some embodiments, a filling cavity 22 is formed between a plurality of insulating support strips 21 and a bottom support member 2, and the cell assembly 1 and the bottom support member 2 are bonded together by thermally conductive adhesive, and the thermally conductive adhesive is filled in the filling cavity 22.

[0034] In this embodiment, since the battery cell assembly 1 and the bottom support 2 are bonded together with thermally conductive adhesive, and the thermally conductive adhesive fills the filling cavity 22, the thermally conductive adhesive can both bond the battery cell assembly 1 and the bottom support 2, ensuring a stable connection between them, and also transfer the heat generated by the battery cell assembly 1 to the bottom support 2, ensuring the safety of the battery cell assembly 1. Simultaneously, the insulating support strip 21 facilitates the application of thermally conductive adhesive into the filling cavity 22 formed by the insulating support strip 21, preventing the battery cell assembly 1 from failing due to insufficient adhesive strength and Z-axis vibration impact.

[0035] It should be noted that the structure of the filling cavity 22 in the above embodiments is determined according to the arrangement of the insulating support strips 21. For example, when the insulating support can extend along the first direction X or along the second direction Y, the filling cavity 22 formed between the multiple insulating support strips 21 and the bottom support 2 is a strip-shaped cavity. When the insulating support extends along both the first direction X and the second direction Y, the filling cavity 22 formed between the multiple insulating support strips 21 and the bottom support 2 is a square cavity.

[0036] In some embodiments, a plurality of insulating support strips 21 extend along a first direction X, and each two adjacent insulating support strips 21 abut against the second side group 112.

[0037] In this embodiment, since multiple insulating support strips 21 extend along the first direction X, and every two adjacent insulating support strips 21 abut against the second side group 112, the two opposite edges of the surface of each battery cell 11 facing the bottom support member 2 in the second direction Y are supported by insulating support strips 21. After the filling cavity 22 formed between the multiple insulating support strips 21 and the bottom support member 2 is filled with thermally conductive adhesive, it can be ensured that the thermally conductive adhesive and the surface of each battery cell 11 facing the bottom support member 2 can be tightly attached, ensuring a stable connection between the battery cell assembly 1 and the bottom support member 2.

[0038] In some embodiments, a plurality of insulating support strips 21 extend along a first direction X, and each two adjacent insulating support strips 21 abut against the first side group 111.

[0039] In this embodiment, since multiple insulating support strips 21 extend along the first direction X, and each pair of adjacent insulating support strips 21 abuts against the first side group 111, the two opposite edges of the surface of each battery cell 11 facing the bottom support member 2 in the first direction X are supported by insulating support strips 21. After the filling cavity 22 formed between the multiple insulating support strips 21 and the bottom support member 2 is filled with thermally conductive adhesive, it can be ensured that the thermally conductive adhesive and the surface of each battery cell 11 facing the bottom support member 2 can be tightly attached, and the battery cell assembly 1 and the bottom support member 2 can also be stably connected.

[0040] In some embodiments, the plurality of insulating support strips 21 include a plurality of first support strips and a plurality of second support strips. The plurality of first support strips extend along a first direction X, and the plurality of second support strips extend along a second direction Y. The plurality of first support strips and the plurality of second support strips intersect to form a grid structure. The first support strips abut against the second side group 112, and the second support strips abut against the first side group 111.

[0041] In this embodiment, since multiple first support strips and multiple second support strips intersect to form a grid structure, the first support strips and the second side group 112 abut against each other, and the second support strips and the first side group 111 abut against each other, so that the two opposite edges of the surface of each battery cell 11 facing the bottom support member 2 in the first direction X and the two opposite edges in the second direction Y are supported by insulating support strips 21. After the filling cavity 22 formed between the multiple insulating support strips 21 and the bottom support member 2 is filled with thermally conductive adhesive, it can be ensured that the thermally conductive adhesive and the surface of each battery cell 11 facing the bottom support member 2 can be tightly attached, and the battery cell assembly 1 and the bottom support member 2 are also stably connected.

[0042] In some embodiments, a plurality of first support bars and a plurality of second support bars intersect to form a plurality of support frames arranged in a matrix, and at least a portion of the frame structure of a support frame is projected along the first direction X into the orthographic projection of a single cell 11 along the first direction X.

[0043] In this embodiment, since multiple first support bars and multiple second support bars intersect to form multiple matrix-arranged support frames, at least a portion of the frame structure of each support frame is projected along the first direction X into the orthogonal projection of a single cell 11 along the first direction X. Therefore, each single cell 11 can be paired with a support frame, so that each single cell 11 is supported by a support frame formed by a first support bar and a second support bar, ensuring that the surface of each single cell 11 facing the bottom support member 2 can be tightly attached.

[0044] In some embodiments, the dimensions of the first support strip in the second direction Y and the second support strip in the first direction X are both greater than or equal to 0.2 mm and less than or equal to 0.5 mm. This not only avoids the impact on the overall strength of the insulating support strip 21 when the dimensions of the first support strip in the second direction Y and the second support strip in the first direction X are small, ensuring the supporting effect of the insulating support strip 21 formed by the first and second support strips on the battery cell assembly 1, but also avoids the impact on the volume of the filling cavity formed between the first and second support strips when the dimensions of the first support strip in the second direction Y and the second support strip in the first direction X are large. This ensures the filling volume of the thermally conductive adhesive in the filling cavity and guarantees the adhesion between the battery cell assembly 1 and the thermally conductive adhesive.

[0045] In some embodiments, the flatness value of the surface of the battery cell assembly 1 facing the bottom support member 2 in the third direction Z is less than or equal to 1 mm. This allows the flatness value of the surface of the battery cell assembly 1 facing the bottom support member 2 in the third direction Z to be controlled within a preset value, avoiding an excessively large flatness value of the surface of the battery cell assembly 1 facing the bottom support member 2 in the third direction Z, which would result in an excessively large size of the required insulating support strip 21 in the third direction Z, thus causing the insulating support strip 21 to occupy too much of the internal installation space of the battery module.

[0046] In some embodiments, the dimension of the insulating support strip 21 in the third direction Z is greater than 1 mm and less than or equal to 2 mm. This ensures that the dimension of the insulating support strip 21 in the third direction Z is greater than the flatness value of the surface of the battery cell assembly 1 facing the bottom support member 2 in the third direction Z. Furthermore, since the dimension of the insulating support strip 21 in the third direction Z is greater than the flatness value of the surface of the battery cell assembly 1 facing the bottom support member 2 in the third direction Z, the structural strength of the insulating support strip 21 can be guaranteed, thereby enhancing the impact resistance of the battery module and further improving the structural strength of the battery module.

[0047] In some embodiments, the bottom support 2 is a shell structure with an opening, and the inner cavity of the bottom support 2 forms a mounting cavity, in which the battery cell assembly 1 is at least partially located. In this way, in addition to supporting the battery cell assembly 1, the bottom support 2 can also protect the battery cell assembly 1. In some embodiments, the insulating support strip 21 is located on the bottom wall of the inner cavity of the bottom support member 2. In this way, while facilitating the installation of the bottom support member 2 and the cell assembly 2, the insulating support strip 21 can ensure the insulating support function of the cell assembly.

[0048] In some embodiments, the battery module further includes an insulating film layer 5, which is located between the side wall of the inner cavity of the bottom support 2 and the cell assembly 1. In this way, the insulating film layer 5 can isolate the cell assembly 1 and the bottom support 2, further ensuring the insulation performance between the bottom support 2 and the cell assembly 1, while the insulating module 5 can compensate for assembly errors between the bottom support 2 and the cell assembly 1.

[0049] In some embodiments, the battery module includes a first end plate 3 and a second end plate 4. The bottom support member 2 has a first boss 23 and a second boss 24 disposed opposite to each other at the edge position in the first direction X. The first end plate 3 is connected to the first boss 23 and the second end plate 4 is connected to the second boss 24.

[0050] In this embodiment, the battery module includes a first end plate 3 and a second end plate 4. The bottom support 2 has a first boss 23 and a second boss 24 disposed opposite to each other at the edge position in the first direction X. The first end plate 3 is connected to the first boss 23, and the second end plate 4 is connected to the second boss 24. This facilitates the installation of the first end plate 3 through the first boss 23 and the installation of the second end plate 4 through the second boss 24. The first end plate 3 and the second end plate 4 ensure the internal sealing of the battery module, protecting the cell assembly 1 from external environmental influences such as physical impact, moisture, and dust. The first end plate 3 and the second end plate 4 can be made of die-cast parts (aluminum alloy or aluminum-magnesium alloy), profiles, or sheet metal, etc., and this embodiment does not limit the specific materials used.

[0051] In some embodiments, the dimensions of the first boss 23 in the third direction Z and the dimensions of the second boss 24 in the third direction Z are both less than or equal to the dimensions of the insulating support strip 21 in the third direction Z.

[0052] In this embodiment, since the dimensions of the first protrusion 23 and the second protrusion 24 in the third direction Z are both less than or equal to the dimensions of the insulating support strip 21 in the third direction Z, the interference of the first protrusion 23 and the second protrusion 24 on the setting of the insulating support strip 21 can be avoided. At the same time, the setting of the first end plate 3 and the second end plate 4 can cover both the battery cell assembly 1 and the insulating support strip 21, further ensuring the airtightness of the battery cell assembly 1.

[0053] As can be seen from the above embodiments, in this application embodiment, since the battery cell assembly 1 is disposed on the bottom support member 2, and the bottom support member 2 has a plurality of spaced insulating support strips 21 disposed on the surface of the battery cell assembly 1, each battery cell 11 has a first side group 111 and a second side group 112 on the surface of the battery cell 11 facing the bottom support member 2. At least one of the first side group 111 and the second side group 112 abuts against the insulating support strip 21. The first side group 111 consists of two opposite edges of the surface of the battery cell 11 facing the bottom support member 2 in the first direction X, and the second side group 112 consists of two opposite edges of the surface of the battery cell 11 facing the bottom support member 2 in the second direction Y. Therefore, at least one set of opposite edges of the surface of the battery cell 11 facing the bottom support member 2 is abutted by the insulating support strip 21, so that there is an insulating support strip 21 between the battery cell 11 and the bottom support member 2. Therefore, the battery cell 11 can avoid direct contact with the bottom support member 2, and short circuit between the battery cell assembly 1 and the bottom support member 2 can be avoided. Furthermore, since the dimension of the insulating support strip 21 in the third direction Z is greater than the flatness value of the surface of the battery cell assembly 1 facing the bottom support member 2 in the third direction Z, the insulating support strip 21 can compensate for the flatness of the surface of the battery cell assembly 1 facing the bottom support member 2 in the third direction Z. This facilitates the application of thermally conductive adhesive in the cavity formed by the insulating support strip 21, and prevents the battery cell assembly 1 from failing due to insufficient adhesion of the thermally conductive adhesive and resulting in Z-axis vibration and impact failure.

[0054] In addition, this application also provides a power supply device, which includes the battery cell assembly 1 described in any of the above embodiments. The beneficial effects of this power supply assembly are the same as those of the battery cell assembly 1, and will not be repeated in this application.

[0055] The various embodiments in the specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0056] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0057] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0058] The present invention has been described in detail above. Specific examples have been used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A battery module having intersecting first, second, and third directions, characterized in that, The battery module includes: Battery cell assembly, the battery cell assembly comprising multiple individual battery cells; A bottom support member is provided, on which the battery cell assembly is disposed. A plurality of spaced insulating support strips are provided on the surface of the bottom support member facing the battery cell assembly. Each battery cell has a first side group and a second side group on its surface facing the bottom support member. At least one of the first side group and the second side group abuts against the insulating support strip. The first side group consists of two opposite edges of the surface of the battery cell facing the bottom support member in a first direction, and the second side group consists of two opposite edges of the surface of the battery cell facing the bottom support member in a second direction. The dimension of the insulating support strip in the third direction is greater than the flatness value of the surface of the battery cell assembly facing the bottom support in the third direction.

2. The battery module according to claim 1, characterized in that, A filling cavity is formed between the plurality of insulating support strips and the bottom support member; The battery cell assembly and the bottom support are bonded together with thermally conductive adhesive, and the thermally conductive adhesive fills the cavity.

3. The battery module according to claim 1, characterized in that, The plurality of insulating support strips extend along the first direction, and each adjacent pair of insulating support strips abuts against the second side group.

4. The battery module according to claim 1, characterized in that, The plurality of insulating support strips extend along the second direction, and each two adjacent insulating support strips abut against the first side group.

5. The battery module according to claim 1, characterized in that, The plurality of insulating support strips include a plurality of first support strips and a plurality of second support strips; Multiple first support bars extend along the first direction, multiple second support bars extend along the second direction, and the multiple first support bars and multiple second support bars intersect to form a grid structure. The first support bars abut against the second side group, and the second support bars abut against the first side group.

6. The battery module according to claim 5, characterized in that, Multiple first support bars and multiple second support bars intersect to form multiple support frames arranged in a matrix; At least a portion of the frame structure of the support frame is projected along the first direction into the orthographic projection of the individual battery cell along the first direction.

7. The battery module according to claim 5, characterized in that, The dimensions of the first support bar in the second direction and the dimensions of the second support bar in the first direction are both greater than or equal to 0.2 mm and less than or equal to 0.5 mm.

8. The battery module according to claim 1, characterized in that, The flatness value of the surface of the cell assembly facing the bottom support in the third direction is less than or equal to 1 mm.

9. The battery module according to claim 1, characterized in that, The dimension of the insulating support strip in the third direction is greater than 1 mm and less than or equal to 2 mm.

10. The battery module according to claim 1, characterized in that, The bottom support is a shell structure with an opening, and the inner cavity of the bottom support forms a mounting cavity, in which the battery cell assembly is at least partially located.

11. The battery module according to claim 10, characterized in that, The insulating support strip is located on the bottom wall of the inner cavity of the bottom support member.

12. The battery module according to claim 10, characterized in that, The battery module also includes an insulating film layer, which is located between the side wall of the inner cavity of the bottom support and the cell assembly.

13. The battery module according to claim 1, characterized in that, The battery module includes a first end plate and a second end plate; The bottom support has a first boss and a second boss disposed opposite to each other at the edge position in the first direction, the first end plate is connected to the first boss, and the second end plate is connected to the second boss.

14. The battery module according to claim 13, characterized in that, The dimensions of the first protrusion in the third direction and the dimensions of the second protrusion in the third direction are both less than or equal to the dimensions of the insulating support strip in the third direction.

15. An electrical appliance, characterized in that, The electrical equipment includes the battery module according to any one of claims 1 to 14.

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