Solid-state battery module

Abstract

The invention provides a solid-state battery module, and relates to the technical field of batteries. The solid-state battery module comprises a battery pack and two pressing assemblies, each pressing assembly comprises a base plate, an elastic piece and a pressing piece, the two base plates included in the two pressing assemblies are arranged at intervals in the first direction, one end of each elastic piece is connected with the corresponding pressing piece, and the other end of each elastic piece is connected with the corresponding base plate; two pressing pieces included in the two pressing assemblies are located between the two substrates, the two pressing pieces abut against the two sides of the battery pack in the first direction respectively, and the elastic piece is compressed in the first direction. In the solid-state battery module disclosed by the invention, the elastic piece can apply pressure to the battery pack, so that the interiors of the solid-state batteries are in contact, and the conduction rate in the solid-state batteries is maintained. When the solid-state battery in the battery pack expands, the elastic piece is compressed to absorb the deformation of the solid-state battery, so that the risk of shell breakage is reduced, and the risk of failure of the solid-state battery module is reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a solid-state battery module. Background Art

[0002] The solid-state battery module includes a shell and a battery pack. The battery pack includes multiple solid-state batteries, and the battery pack is arranged in the shell. The electrolyte in the solid-state battery is solid. The solid-state electrolyte is not easy to volatilize or burn, and is stable to temperature and not easy to decompose, which makes the solid-state battery have higher safety. The solid-state electrolyte has better stability and mechanical properties, has better inhibition of lithium dendrites, and can improve the safety of the battery. With the spread of lithium-ion batteries in various fields of production and life, solid-state batteries have been widely used.

[0003] Since solid-state batteries do not have electrolytes, they need to maintain a high pressure to ensure the internal conductivity of the solid-state battery. However, when the solid-state battery expands, the overall size of the battery pack increases, and the force exerted by the battery pack on the outer shell increases, which increases the risk of the outer shell rupturing and the risk of solid-state battery module failure. Summary of the invention

[0004] In view of this, the present application provides a solid-state battery module to solve the problem that when the solid-state battery expands, the overall size of the battery pack increases, and the force exerted by the battery pack on the outer casing increases, which increases the risk of the outer casing rupture and the risk of failure of the solid-state battery module.

[0005] The present application provides a solid-state battery module, which includes a battery pack and two clamping assemblies, wherein the clamping assembly includes a substrate, an elastic member and a clamping member, wherein the two substrates included in the two clamping assemblies are arranged at intervals along a first direction, one end of the elastic member is connected to the clamping member, and the other end of the elastic member is connected to the substrate, and the two clamping members included in the two clamping assemblies are located between the two substrates, and the two clamping members are respectively abutted against two sides of the battery pack in the first direction, and the elastic member is compressed along the first direction.

[0006] Preferably, the clamping assembly further comprises a connecting column and a locking member, the connecting column is fixed on the clamping member, and the elastic member is sleeved on the connecting column;

[0007] The connecting column passes through the base plate, and the locking member is threadedly connected to the connecting column and abuts against a side of the base plate facing away from the pressing member.

[0008] Preferably, the solid-state battery module further comprises a fixing column, the fixing column extends along the first direction, and two ends of the fixing column are respectively connected to the two substrates;

[0009] The pressing piece is provided with a communicating hole, and the fixing column passes through the communicating hole.

[0010] Preferably, the battery pack comprises a buffer and a plurality of solid-state batteries, the plurality of solid-state batteries are stacked along the first direction, and the buffer is disposed between any two adjacent solid-state batteries among the plurality of solid-state batteries.

[0011] Preferably, the battery pack also includes two end plates, the two end plates are arranged at intervals along the first direction, the multiple solid-state batteries are arranged between the two end plates, and the buffer member is also arranged between the solid-state battery located at the edge and the end plate, and the two end plates are respectively abutted against the two clamping members.

[0012] Preferably, the solid-state battery module also includes a bottom plate, a top plate and two surrounding plates, the bottom plate and the top plate are arranged at intervals along the second direction, the two surrounding plates are arranged at intervals along the third direction, the bottom plate, the top plate and the two surrounding plates are respectively connected to the two substrates, the bottom plate, the top plate, the two substrates and the two surrounding plates enclose an installation space, the battery pack and the two clamping assemblies are both arranged in the installation space, and the first direction, the second direction and the third direction are perpendicular to each other.

[0013] Preferably, the solid-state battery includes a positive electrode ear and a negative electrode ear, and the positive electrode ear and the negative electrode ear are respectively located on both sides of the solid-state battery in the third direction, and in two adjacent solid-state batteries, the positive electrode ear of one solid-state battery and the negative electrode ear of the other solid-state battery are located on the same side.

[0014] Preferably, the solid-state battery module further comprises two liquid heating plates, and the two liquid heating plates are respectively arranged on both sides of the battery pack in the second direction.

[0015] Preferably, the solid-state battery module further includes a support plate, one of the liquid heating plates is fixed to the bottom plate via the support plate, and the other of the liquid heating plates is fixed to the top plate via the support plate.

[0016] Preferably, the liquid heating plate comprises a plate body, a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe and the liquid outlet pipe are both connected to the interior of the plate body, part of the liquid inlet pipe extends from one of the enclosures, and part of the liquid outlet pipe extends from the other enclosure.

[0017] In the solid-state battery module of the present application, the elastic member can apply pressure to the battery pack so that the inside of the solid-state battery contacts, thereby maintaining the conductivity inside the solid-state battery. When the solid-state battery in the battery pack expands, the elastic member is compressed to absorb the deformation of the solid-state battery, reducing the risk of shell rupture, thereby reducing the risk of failure of the solid-state battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram showing the three-dimensional structure of a solid-state battery module according to an embodiment of the present invention;

[0020] Figure 2 A diagram showing the relative positions of the pressing assembly and the battery pack;

[0021] Figure 3 A diagram showing the relative positions of the clamping assembly and the base plate;

[0022] Figure 4 A diagram showing the relative positions of the liquid heating plate and the bottom plate;

[0023] Figure 5 A schematic diagram of the structure of a battery pack is shown.

[0024] Icons: 11-base plate; 12-elastic part; 13-pressing part; 14-connecting column; 15-locking part; 2-battery pack; 21-solid-state battery; 211-positive electrode ear; 212-negative electrode ear; 22-end plate; 23-buffer; 3-liquid hot plate; 31-plate body; 32-liquid inlet pipe; 33-liquid outlet pipe; 4-fixing column; 51-bottom plate; 52-top plate; 53-enclosing plate; 54-cover; 55-support plate; L1-first direction; L2-second direction; L3-third direction. DETAILED DESCRIPTION

[0025] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.

[0026] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0027] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.

[0028] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0029] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.

[0030] For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the other element. Therefore, the term "above" includes both "above" and "below" orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0031] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprise" and "have" list the stated features, quantities, operations, components, elements and / or their combinations that exist, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0032] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0033] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0034] The following will be combined Figures 1 to 5 The solid-state battery module of the present application is described. Figures 1 to 5 In the embodiment, the first direction L1, the second direction L2 and the third direction L3 are perpendicular to each other.

[0035] like Figures 1 to 5 As shown, the solid-state battery module includes a battery pack 2 and two clamping assemblies, the clamping assembly includes a substrate 11, an elastic member 12 and a clamping member 13, the two substrates 11 included in the two clamping assemblies are arranged at intervals along the first direction L1, one end of the elastic member 12 is connected to the clamping member 13, and the other end of the elastic member 12 is connected to the substrate 11, and the two clamping members 13 included in the two clamping assemblies are located between the two substrates 11, and the two clamping members 13 are respectively abutted against the two sides of the battery pack 2 in the first direction L1, and the elastic member 12 is compressed along the first direction L1. In the solid-state battery module of the present application, the elastic member 12 can apply pressure to the battery pack 2 so that the inside of the solid-state battery 21 is in contact, thereby maintaining the conductivity inside the solid-state battery 21. When the solid-state battery 21 in the battery pack 2 expands, the elastic member 12 is compressed to absorb the deformation of the solid-state battery 21, reducing the risk of shell rupture, thereby reducing the risk of failure of the solid-state battery module.

[0036] In addition, the solid-state battery 21 will expand and deform after charging, causing the elastic member 12 to be further compressed. At this time, the force applied by the elastic member 12 to the clamping member 13 increases, and the force applied to the battery pack 2 increases, which helps the internal contact of the solid-state battery 21 in the battery pack 2.

[0037] In the embodiments of the present application, Figure 1 and Figure 2As shown, the solid-state battery module also includes a bottom plate 51, a top plate 52 and two surrounding plates 53. The bottom plate 51 and the top plate 52 are arranged at intervals along the second direction L2, and the two surrounding plates 53 are arranged at intervals along the third direction L3. The bottom plate 51, the top plate 52 and the two surrounding plates 53 are respectively connected to the two substrates 11, the bottom plate 51 is connected to the two surrounding plates 53, and the top plate 52 is also connected to the two surrounding plates 53. The bottom plate 51, the top plate 52, the two substrates 11 and the two surrounding plates 53 enclose an installation space, and the battery pack 2 and the two clamping assemblies are arranged in the installation space.

[0038] like Figure 5 As shown, the battery pack 2 includes a buffer 23 and a plurality of solid-state batteries 21, and the plurality of solid-state batteries 21 are stacked along the first direction L1, and a buffer 23 is provided between any two adjacent solid-state batteries 21 among the plurality of solid-state batteries 21. The buffer 23 is plate-shaped, and the buffer 23 includes a first surface and a second surface facing each other in the first direction L1, and the first surface and the second surface are respectively bonded to two adjacent solid-state batteries 21. The buffer 23 can be deformed to absorb the deformation of the solid-state battery 21. Optionally, the buffer 23 can be a deformable plate-shaped structure such as foam.

[0039] Furthermore, if Figure 5 As shown, the solid-state battery 21 includes a positive electrode ear 211 and a negative electrode ear 212, and the positive electrode ear 211 and the negative electrode ear 212 are respectively located on both sides of the solid-state battery 21 in the third direction L3. In two adjacent solid-state batteries 21, the positive electrode ear 211 of one solid-state battery 21 and the negative electrode ear 212 of the other solid-state battery 21 are located on the same side. Arranging multiple solid-state batteries 21 in the above manner can facilitate the connection of two adjacent solid-state batteries 21 in series.

[0040] In addition, the battery pack 2 also includes two end plates 22, which are spaced apart along the first direction L1, and a plurality of solid-state batteries 21 are arranged between the two end plates 22. A buffer member 23 is also bonded between the solid-state battery 21 at the edge and the end plate 22, and the two end plates 22 are respectively in contact with two clamping members 13. In this way, the elastic member 12 in the clamping assembly can apply force to the end plate 22 through the clamping member 13, and then apply force to the solid-state battery 21 in the battery pack 2, thereby maintaining the conductivity inside the solid-state battery 21.

[0041] In the embodiments of the present application, Figure 2 and Figure 3As shown, the clamping assembly further includes a connecting column 14 and a locking member 15. The connecting column 14 can be welded on the clamping member 13, and the elastic member 12 is sleeved on the connecting column 14. The connecting column 14 passes through the substrate 11, and the locking member 15 is threadedly connected to the connecting column 14 and abuts against the side of the substrate 11 facing away from the clamping member 13. In this way, by adjusting the connection position of the locking member 15 and the connecting column 14, the distance between the substrate 11 and the clamping member 13 in the first direction L1 can be adjusted to adjust the compression degree of the elastic member 12, thereby achieving the adjustment of the force on the battery pack 2.

[0042] Preferably, the elastic member 12 is a spring, the locking member 15 is a nut, a thread is formed on the connecting column 14, the threaded portion of the connecting column 14 passes through the substrate 11, and the nut is sleeved on the connecting column 14. In this way, the size of the elastic member 12 in the first direction L1 can be adjusted by tightening or releasing the nut, thereby adjusting the force applied to the battery pack 2. In addition, when the elastic member 12 is a spring, the required pressure can be calculated based on the expansion force of the solid-state battery 21, the diameter and spring coefficient of the spring can be adjusted, and a spring with suitable parameters can be found to cope with battery packs 2 with different pressure requirements.

[0043] Optionally, the pressing member 13 is a plate, which can improve the uniformity of the force applied by the pressing member 13 to the end plate 22, thereby improving the uniformity of the force applied to the battery pack 2. After the locking member 15 is adjusted, a cover 54 can be provided outside the substrate 11, so that the locking member 15 is covered in the cover 54. Optionally, the cover 54 can be fixed to the substrate 11 by bolts, so that the cover 54 can be installed and removed.

[0044] Preferably, there are multiple connecting columns 14, for example, 4, 6, 8 or more, and the multiple connecting columns 14 are arranged at intervals. The number of elastic members 12, connecting columns 14 and locking members 15 is the same, so that each connecting column 14 is correspondingly provided with an elastic member 12 and a locking member 15. The multiple locking members 15 can apply force to different positions of the clamping member 13, thereby ensuring the uniformity of the force on the battery pack 2.

[0045] Furthermore, if Figure 3 and Figure 3 As shown, the solid-state battery module also includes a fixing column 4, which extends along the first direction L1, and the two ends of the fixing column 4 are respectively welded to the two substrates 11; the clamping member 13 is provided with a connecting hole, and the fixing column 4 passes through the connecting hole. There are four fixing columns 4, and the four fixing columns 4 are respectively welded at the four corners of the substrate 11, so as to realize the rigid connection between the two substrates 11. The fixing column 4 passes through the connecting hole on the clamping member 13, so that the fixing column 4 can limit the moving direction of the clamping member 13.

[0046] In the embodiments of the present application, Figure 2 and Figure 4 As shown, the solid-state battery module also includes two liquid heating plates 3, which are respectively arranged on both sides of the battery pack 2 in the second direction L2. The battery pack 2 can be quickly heated by the two liquid heating plates 3, which can effectively improve the temperature performance of the battery pack 2 in the low temperature area. At the same time, the two liquid heating plates 3 are both located inside the shell, which can form an air gap between the liquid heating plate 3 and the vehicle body and the outside world to improve the insulation effect.

[0047] Furthermore, the solid-state battery module further includes four support plates 55, wherein two of the support plates 55 are welded to the bottom plate 51 at intervals along the first direction L1, and the other two support plates 55 are welded to the top plate 52 at intervals along the first direction L1, the two support plates 55 are welded to one liquid hot plate 3 by cold brazing, and the other two support plates 55 are welded to another liquid hot plate 3 by cold brazing. Optionally, the battery pack 2 and the liquid hot plate 3 on the bottom plate 51 can be bonded by structural adhesive.

[0048] Alternatively, if Figure 4 As shown, the liquid heating plate 3 includes a plate body 31, a liquid inlet pipe 32 and a liquid outlet pipe 33. The liquid inlet pipe 32 and the liquid outlet pipe 33 are both connected to the interior of the plate body 31. Part of the liquid inlet pipe 32 extends from one enclosure 53, and part of the liquid outlet pipe 33 extends from another enclosure 53.

[0049] In the battery module of the present application, the elastic member 12 can apply pressure to the battery pack 2 to maintain the conductivity inside the solid-state battery 21. When the solid-state battery 21 in the battery pack 2 expands, the elastic member 12 is compressed to absorb the deformation of the solid-state battery 21, reducing the risk of shell rupture. At the same time, as the elastic member 12 is further compressed, the force applied by the elastic member 12 to the pressing member 13 increases, and the force applied to the battery pack 2 increases, which helps the solid-state battery 21 in the battery pack 2 to contact each other internally.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A solid-state battery module, characterized in that: The solid-state battery module includes a battery pack and two clamping assemblies, the clamping assembly includes a substrate, an elastic member and a clamping member, the two substrates included in the two clamping assemblies are arranged at intervals along a first direction, one end of the elastic member is connected to the clamping member, and the other end of the elastic member is connected to the substrate, the two clamping members included in the two clamping assemblies are located between the two substrates, the two clamping members are respectively abutted against two sides of the battery pack in the first direction, and the elastic member is compressed along the first direction.

2. The solid-state battery module according to claim 1, characterized in that: The clamping assembly further comprises a connecting column and a locking member, wherein the connecting column is fixed on the clamping member, and the elastic member is sleeved on the connecting column; The connecting column passes through the base plate, and the locking member is threadedly connected to the connecting column and abuts against a side of the base plate facing away from the pressing member.

3. The solid-state battery module according to claim 1, characterized in that: The solid-state battery module further includes a fixing column, the fixing column extends along the first direction, and two ends of the fixing column are respectively connected to the two substrates; The pressing piece is provided with a communicating hole, and the fixing column passes through the communicating hole.

4. The solid-state battery module according to any one of claims 1 to 3, characterized in that: The battery pack includes a buffer and a plurality of solid-state batteries, the plurality of solid-state batteries are stacked along the first direction, and the buffer is disposed between any two adjacent solid-state batteries among the plurality of solid-state batteries.

5. The solid-state battery module according to claim 4, characterized in that: The battery pack also includes two end plates, which are spaced apart along the first direction, and the multiple solid-state batteries are arranged between the two end plates. The buffer member is also arranged between the solid-state battery located at the edge and the end plate, and the two end plates are respectively abutted against the two clamping members.

6. The solid-state battery module according to claim 4, characterized in that: The solid-state battery module also includes a bottom plate, a top plate and two enclosures, the bottom plate and the top plate are arranged at intervals along the second direction, the two enclosures are arranged at intervals along the third direction, the bottom plate, the top plate and the two enclosures are respectively connected to the two substrates, the bottom plate, the top plate, the two substrates and the two enclosures enclose an installation space, the battery pack and the two clamping assemblies are both arranged in the installation space, and the first direction, the second direction and the third direction are perpendicular to each other.

7. The battery module according to claim 6, characterized in that: The solid-state battery includes a positive electrode ear and a negative electrode ear, and the positive electrode ear and the negative electrode ear are respectively located on both sides of the solid-state battery in the third direction. In two adjacent solid-state batteries, the positive electrode ear of one solid-state battery and the negative electrode ear of the other solid-state battery are located on the same side.

8. The solid-state battery module according to claim 6, characterized in that: The solid-state battery module further includes two liquid heating plates, which are respectively arranged on both sides of the battery pack in the second direction.

9. The solid-state battery module according to claim 8, characterized in that: The solid-state battery module also includes a support plate, one of the liquid heating plates is fixed to the bottom plate via the support plate, and the other of the liquid heating plates is fixed to the top plate via the support plate.

10. The solid-state battery module according to claim 8, characterized in that: The liquid heating plate comprises a plate body, a liquid inlet pipe and a liquid outlet pipe, wherein the liquid inlet pipe and the liquid outlet pipe are both connected to the interior of the plate body, a portion of the liquid inlet pipe extends from one of the enclosures, and a portion of the liquid outlet pipe extends from another of the enclosures.

Images