Battery system and electric device

Abstract

The utility model relates to a battery system and a power utilization device. The battery system comprises an outer box, a bracket assembly and a plurality of groups of battery modules, a containing cavity is formed in the outer box, and the support assembly is arranged in the containing cavity and divides the containing cavity into at least two layers of containing spaces which are sequentially arranged in the height direction of the outer box. Each group of battery modules comprises a binding part and a plurality of battery monomers, and the plurality of battery monomers are bound into a whole by the binding part. And at least one group of battery modules are arranged in each layer of accommodating space. According to the technical scheme, the structure of the battery system can be simplified, the redundancy of the system structure is reduced, and the reduction of the weight of the system is facilitated.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to battery systems and electrical devices. Background Art

[0002] At present, the commercial vehicle battery system on the market is generally composed of a combination of standard boxes, and multiple standard boxes are arranged and installed on the battery system mounting frame, and connected in series and parallel through external high-voltage wiring harnesses. Each standard box has an independent box body for sealing, resulting in a large number of system parts, and the standard box body and the system frame have duplicate functions, resulting in a battery system structure. Utility Model Content

[0003] Based on this, the present application provides a battery system and an electrical device that can simplify the system structure, avoid system structure redundancy, and reduce system weight.

[0004] In a first aspect, an embodiment of the present application provides a battery system, characterized in that the battery system comprises:

[0005] An outer box is formed with a receiving cavity;

[0006] A bracket assembly is disposed in the accommodating cavity and divides the accommodating cavity into at least two layers of accommodating spaces arranged in sequence in the height direction of the outer box; and

[0007] A plurality of battery modules are provided, each of which comprises a binding part and a plurality of battery cells, wherein the binding part binds the plurality of battery cells together; at least one battery module is arranged in each layer of the accommodating space.

[0008] In some embodiments, the support assembly includes a partition plate, and each two adjacent layers of the accommodating spaces are separated up and down by the partition plate.

[0009] In some embodiments, the support assembly further includes a support beam, wherein the support beam is disposed in each layer of the accommodating space, and the support beam supports the partition plate located above the support beam.

[0010] In some embodiments, the support beam is spaced apart from the partition plate located above the support beam to form an installation space;

[0011] The bracket assembly includes a support block, which is arranged in the installation space, one end of which is fixedly connected to the support beam, and the other end of which is supportively connected to the partition plate.

[0012] In some embodiments, the support block and the support beam, as well as the support block and the partition plate are fastened together.

[0013] In some embodiments, a plurality of the support beams are disposed in each layer of the accommodating space, and all of the support beams are staggered and divide the accommodating space into a plurality of independently arranged sub-cavities.

[0014] In some embodiments, a convex edge is provided on the inner wall of the side circumference of the outer box, and the partition plate is supported on the convex edge.

[0015] In some embodiments, the outer box includes a bottom plate and a box cover, the box cover and the bottom plate are arranged relatively spaced apart in the height direction of the outer box, and the accommodating cavity is located between the bottom plate and the box cover;

[0016] In some embodiments, the support beam located in the bottommost accommodating space is disposed on the bottom plate.

[0017] In some embodiments, the support beam located in the uppermost accommodating space is spaced apart from the top inner wall of the box cover.

[0018] In some embodiments, a heat exchange channel for circulating a heat exchange medium is formed in at least one of the bottom plate and the partition plate.

[0019] In some embodiments, a thermally conductive adhesive layer is disposed on the battery module, and the thermally conductive adhesive layer fixedly connects the battery module and the bottom wall of the accommodating space.

[0020] In some embodiments, a plug-in assembly is provided on the outer box, and the plug-in assembly is connected to all the battery module circuits for plugging in external circuits.

[0021] In some embodiments, all of the battery cells in each group of the battery modules are arranged horizontally side by side;

[0022] The binding part includes binding strips and end plates, and the end plates are arranged at both ends of all the battery cells in the side-by-side direction; all the battery cells and the end plates are together constructed as a bound part, and the binding strips are wrapped around the side circumference of the bound part in the horizontal direction to tighten the bound part.

[0023] In some embodiments, the end plate is provided with a vertically arranged connection hole, and the end plate is fixedly connected to the bracket assembly or the outer box via a fastener passing through the connection hole.

[0024] In a second aspect, an embodiment of the present application provides an electrical device, comprising the battery system described in the above embodiment, wherein the battery system is used to provide electrical energy.

[0025] The battery system and the power-consuming device are provided with a bracket assembly in the outer box, and the bracket assembly is used to divide the accommodating cavity of the outer box into multiple layers of accommodating spaces, each of which is used to store at least one group of battery modules. The battery system can protect all the battery modules in the accommodating cavity through the outer box, so that all the battery modules are protected from external force damage. Compared with the method of packaging all the battery modules into multiple standard boxes, the battery module only uses the binding part to bind multiple battery cells together. Under the condition of the same overall capacity, the external box structure of the traditional standard box can be omitted, which significantly simplifies the system structure, reduces the system function redundancy, and helps to reduce the system weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0027] Figure 1 Schematic diagram of the appearance of a battery system according to some embodiments.

[0028] Figure 2 for Figure 1 An exploded schematic diagram of the battery system is shown.

[0029] Figure 3 for Figure 2 The battery system shown is arranged in the lowest accommodating space of the battery module.

[0030] Figure 4 for Figure 2 The battery system shown is arranged in the uppermost accommodating space of the battery module.

[0031] Figure 5 for Figure 1 A partial cross-sectional view of the battery system shown.

[0032] Figure 6 Schematic diagram of the structure of the support block of some embodiments.

[0033] Figure 7 Schematic diagram of the structure of battery modules of some embodiments.

[0034] The reference numerals in the specific implementation manner are as follows:

[0035] 100. Battery system; X, height direction;

[0036] 10. Outer box; 11. Bottom plate; 12. Frame; 13. Box cover; Q. Accommodating cavity; Q1. Accommodating space; Q11. Sub-cavity; 14. Convex edge;

[0037] 20. Bracket assembly; 21. Partition plate; 22. Support beam; 22a. Cross beam; 22b. Longitudinal beam; k1. First fixing hole; k2. Second fixing hole; r. Installation space; 23. Support block; 23a. Fastening hole; 24. First fastener; 25. Second fastener; 26. Third fastener;

[0038] 30. Battery module; 31. Binding part; 31a. Binding strip; 31b. End plate; b1. Connection hole; 32. Battery cell;

[0039] 40. Plug-in assembly. DETAILED DESCRIPTION

[0040] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0041] In the description of the present application, it should be understood that terms such as “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships, if any, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0042] In addition, if present, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0043] In this application, unless otherwise clearly specified and limited, if any, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] In the present application, if it appears, unless otherwise clearly specified and limited, a first feature “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature “above”, “above” and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature “below”, “below” and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0045] It should be noted that, if present, when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0046] The embodiments of the present application propose a new battery system to address the problems of redundant structure and heavy weight of the battery system mentioned in the background art.

[0047] Please refer to Figures 1 to 4 The battery system 100 provided in the embodiment of the present application includes an outer box 10, a bracket assembly 20 and a plurality of battery modules 30. The outer box 10 is formed with a receiving chamber Q, and the bracket assembly 20 is arranged in the receiving chamber Q, and the receiving chamber Q is divided into at least two layers of receiving spaces Q1 arranged in sequence in the height direction X of the outer box 10. Each group of battery modules 30 includes a binding portion 31 and a plurality of battery cells 32, and the binding portion 31 binds the plurality of battery cells 32 together. At least one group of battery modules 30 is arranged in each layer of receiving space Q1.

[0048] The outer box 10 is a packaging structure of the battery system 100. The accommodating cavity Q formed by the outer box 10 can accommodate the battery module 30 and other structures to protect them. The outer box 10 can be made of, but not limited to, plastic. When in use, the height direction X of the outer box 10 usually corresponds to the vertical direction.

[0049] After a plurality of battery cells 32 are grouped in a certain arrangement, they are bundled together by the bundling unit 31 to obtain a battery module 30. In actual conditions, the arrangement of the plurality of battery cells 32 may be, but is not limited to, arranged side by side in the horizontal direction. For example, when the battery cell 32 is a square structure, the plurality of battery cells 32 may be arranged side by side in one row or multiple rows in the thickness direction of the battery cell 32. Typically, each group of battery modules 30 includes a row of battery cells 32. Of course, in other embodiments, the battery cells 32 may also be circular in structure.

[0050] The specific structure of the battery cell 32 can refer to the conventional settings in the art. In one embodiment, the battery cell 32 includes a housing and an electrode assembly contained in the housing. The electrode assembly is the smallest unit for the battery system 100 to perform an electrochemical reaction, which generally includes a positive electrode sheet, a negative electrode sheet, and a separator, which insulates and isolates the positive electrode sheet and the negative electrode sheet and allows ions to pass through itself. The electrode assembly can be a winding type, a stacked type, etc.

[0051] The bundling part 31 bundles the multiple battery cells 32 together, so that the multiple battery cells 32 are arranged in a bundle. Specifically, the bundling part 31 may include a bundling rope, a bundling belt, etc. The specific structure of the bundling part 31 is not limited in the embodiment of the present application, as long as the multiple battery cells 32 can be bundled to form a module structure. Usually, the multiple battery cells 32 are arranged horizontally side by side, and the bundling part 31 surrounds the periphery of the multiple battery cells 32 arranged side by side roughly along the horizontal plane and binds the multiple battery cells 32 tightly.

[0052] It is worth pointing out that, with respect to the battery module 30 , all the battery cells 32 are regarded as a whole, and the binding portion 31 does not completely wrap around the outside of the whole, but only binds the whole by contacting a partial area of ​​the whole to avoid looseness.

[0053] The bracket assembly 20 and the battery module 30 are both arranged in the accommodating cavity Q of the outer box 10. The bracket assembly 20 divides the accommodating cavity Q into multiple layers of accommodating spaces Q1, and each layer of accommodating spaces Q1 is arranged up and down. At least one group of battery modules 30 is arranged in each accommodating space Q1. It can be understood that in order to improve the integration of the battery system 100, multiple groups of battery modules 30 are often arranged in one layer of accommodating space Q1. Taking the traditional standard box as a reference, N groups of battery modules 30 are usually configured in a standard box. When designing, M*N / C groups of battery modules 30 can be configured in each layer of accommodating space Q1 corresponding to the number of standard boxes required M. Among them, C is the number of layers of the accommodating space Q1, and M, N and C are all greater than or equal to 2.

[0054] The battery system 100 in the embodiment of the present application is provided with a bracket assembly 20 in the outer box 10, and the bracket assembly 20 is used to divide the accommodating cavity Q of the outer box 10 into multiple layers of accommodating spaces Q1, and each accommodating space Q1 is used to store at least one group of battery modules 30. The battery system 100 can protect all the battery modules 30 located in the accommodating cavity Q through the outer box 10, so that all the battery modules 30 are protected from external force damage. Compared with the method of packaging all the battery modules 30 into multiple standard boxes, the battery module 30 only uses the binding part 31 to bind multiple battery cells 32 together to form a module structure. Under the condition of the same overall electrical capacity, the external box structure of the traditional standard box can be omitted, which significantly simplifies the system structure, reduces system function redundancy, and helps to reduce the system weight.

[0055] It is worth noting that there are many ways to construct the bracket assembly 20, which is not limited to the structure of the bracket assembly 20 exemplified in the following embodiments. Those skilled in the art can perform conventional design according to conventional means.

[0056] In some embodiments, reference Figures 2 to 5 The bracket assembly 20 includes a partition plate 21 , and each two adjacent layers of accommodating spaces Q1 are divided up and down by the partition plate 21 .

[0057] That is, the partition plate 21 is used to divide the inner space of the accommodation chamber Q into multiple layers of accommodation spaces Q1 .

[0058] In the two adjacent layers of accommodation spaces Q1 separated by the partition plate 21, the upper surface of the partition plate 21 can be used as the bottom wall of the upper layer of accommodation space Q1, for supporting the battery module 30 in the upper layer of accommodation space Q1. The bottom wall of the accommodation space Q1 using the partition plate 21 as its bottom wall can be formed by a whole partition plate 21, or by a plurality of partition plates 21 spliced ​​into a whole.

[0059] At this time, the partition plate 21 is used to separate the accommodating chamber Q, which not only has a simple structure but also provides reliable support for the battery module 30 .

[0060] Further to the embodiments, refer to Figures 2 to 5 The support assembly 20 further includes a support beam 22 , and a support beam 22 is disposed in each layer of the accommodating space Q1 , and the support beam 22 supports the partition plate 21 located above the support beam 22 .

[0061] The cross section of the support beam 22 can be I-shaped, L-shaped, n-shaped, etc., and is not specifically limited. A support beam 22 is provided in each layer of the accommodation space Q1. If the layer of the accommodation space Q1 is not the uppermost layer of the accommodation space Q1, there is a partition plate 21 above the layer of the accommodation space Q1, and the support beam 22 can support the partition plate 21. The support beam 22 can directly contact the partition plate 21 to support the partition plate 21, or it can indirectly support the partition plate 21.

[0062] Specifically, the support beam 22 may be arranged at an edge position and / or a middle position of the accommodating space Q1 as long as the placement of the battery module 30 is not affected.

[0063] At this time, the supporting beam 22 is added to support the partition plate 21 , so as to improve the structural stability of the partition plate 21 .

[0064] It is understandable that in other embodiments, the partition plate 21 may also be supported by providing a supporting structure on the inner wall of the outer box 10 .

[0065] In a specific embodiment, the support beam 22 and the partition plate 21 above the support beam 22 are separated to form an installation space r. The bracket assembly 20 includes a support block 23 disposed in the installation space r, one end of which is fixedly connected to the support beam 22 and the other end of which supports the partition plate 21.

[0066] The support beam 22 indirectly supports the partition plate 21 through the support block 23 . An installation space r is formed between the support beam 22 and the partition plate 21 . The support block 23 is disposed in the installation space r.

[0067] Typically, a plurality of support blocks 23 are arranged at intervals along the extension direction of the support beam 22 , and each support beam 22 can support the partition plate 21 from a plurality of force-bearing positions through the plurality of support blocks 23 , thereby improving the force uniformity of the partition plate 21 .

[0068] At this time, the support beam 22 indirectly supports the partition plate 21 through the support block 23 , which not only reduces the consumables of the support beam 22 , but also makes the installation space r more convenient for heat dissipation of the battery module 30 .

[0069] It should be noted that one end of the support block 23 is fixedly connected to the support beam 22, and the other end supports the partition plate 21. The support block 23 and the support beam 22 may be tightly connected, and the support block 23 and the partition plate 21 may be in contact, concave-convex engagement, tightly connected, etc.

[0070] In a specific embodiment, referring to Figure 5 and Figure 6 The support block 23 and the support beam 22, as well as the support block 23 and the partition plate 21 are all firmly connected, which not only simplifies the structure but also provides reliable connection.

[0071] Specifically, Figure 5 and Figure 6 As shown, the support block 23 is provided with fastening holes 23a, part of which is used to install the first fastener 24 that fixes the support block 23 to the support beam 22, and part of which is used to install the second fastener 25 that fixes the support block 23 to the partition plate 21. The first fastener 24 and the second fastener 25 can be structures such as bolts and pins.

[0072] In a further embodiment, referring to Figure 5 The support block 23 can simultaneously fasten and connect the partition plate 21 and the support beam 22 located above it through the second fastener 25. In this way, the number of fasteners can be reduced, the assembly process of the battery system 100 can be simplified, and the assembly efficiency can be improved.

[0073] In some embodiments, reference Figure 3 and Figure 4 A plurality of support beams 22 are disposed in each layer of the accommodating space Q1 , and all the support beams 22 are staggered and divide the accommodating space Q1 into a plurality of independently arranged sub-cavities Q11 .

[0074] Specifically, Figure 3 and Figure 4 As shown, the support beam 22 includes a longitudinal beam 22b and a transverse beam 22a. The longitudinal beam 22b and the transverse beam 22a are arranged roughly vertically. A plurality of longitudinal beams 22b can be symmetrically arranged on both sides of the transverse beam 22a, and the space between adjacent longitudinal beams 22b serves as a subcavity Q11.

[0075] At this time, the accommodating space Q1 is divided into multiple independent sub-cavities Q11, and the number of battery modules 30 configured in each sub-cavity Q11 can be equivalent to the number of battery modules 30 configured in a standard box, that is, each layer of accommodating space Q1 can accommodate the same number of battery modules 30 as multiple standard boxes.

[0076] In this way, the number of sub-cavities Q11 can be designed in accordance with the number of standard boxes configured on the conventional battery system 100. Moreover, the plurality of support beams 22 can jointly support the partition plate 21 located above, so that the force on the partition plate 21 is more uniform, and the partition plate 21 supports the battery module 30 more reliably.

[0077] In some embodiments, reference Figure 3 and Figure 5 A convex edge 14 is provided on the inner wall of the side of the outer box 10 , and the partition plate 21 is supported on the convex edge 14 .

[0078] It can be understood that the outer box 10 has a bottom inner wall, a top inner wall and a side inner wall, the bottom inner wall and the top inner wall are arranged oppositely, and the side inner wall is arranged around the edges of the bottom inner wall and the top inner wall, and arranged between the bottom inner wall and the top inner wall. The convex edge 14 can be integrally formed on the side inner wall of the outer box 10, or it can be separately arranged on the side inner wall of the outer box 10. Specifically, the convex edge 14 is arranged in a circle along the side inner wall of the outer box 10, and a plurality of convex edges 14 can also be intermittently arranged along the side inner wall of the outer box 10.

[0079] At this time, the convex edge 14 can be used to support the edge of the partition plate 21 to improve the supporting stability of the partition plate 21.

[0080] In some embodiments, in combination Figure 1 and Figure 2 The outer box 10 includes a bottom plate 11 and a box cover 13 . The box cover 13 and the bottom plate 11 are arranged relatively spaced apart in the height direction X of the outer box 10 . The accommodating cavity Q is located between the bottom plate 11 and the box cover 13 .

[0081] Understandably, the outer box 10 further includes a frame 12, which is disposed on one side of the bottom plate 11 and around the edge of the bottom plate 11. The frame 12 and the bottom plate 11 enclose at least a portion of the accommodating cavity Q, and the box cover 13 covers the side of the frame 12 away from the bottom plate 11. The frame 12 forms the inner wall of the side periphery of the outer box 10. The box cover 13 can be, but is not limited to, capable of forming a portion of the accommodating cavity Q. The frame 12 and the bottom plate 11 are usually integrally formed or fixedly connected, and the box cover 13 and the frame 12 can be detachably connected for easy assembly.

[0082] In a further embodiment, referring to Figure 3 The support beam 22 located in the bottom accommodating space Q1 is disposed on the bottom plate 11. In other words, the bottom plate 11 constitutes the bottom inner wall of the bottom accommodating space Q1. In this way, the bottom accommodating space Q1 is defined by the bottom plate 11, which can reduce the number of components, reduce system costs, and simplify the system structure.

[0083] In a further embodiment, the support beam 22 located in the uppermost accommodating space Q1 is spaced apart from the top inner wall of the box cover 13. In other words, the partition plate 21 is not disposed above the support beam 22 of the uppermost accommodating space Q1, and the uppermost accommodating space Q1 is defined by the inner wall of the box cover 13, which can reduce the number of components, reduce system cost, and simplify the system structure.

[0084] In a further embodiment, a heat exchange flow channel for circulating a heat exchange medium is formed in at least one of the bottom plate 11 and the partition plate 21. The heat exchange medium may be, but is not limited to, water, gas, etc. The heat exchange flow channel is provided in the bottom plate 11 and the partition plate 21, and heat can be exchanged for the battery module 30 placed on the bottom plate 11 and the partition plate 21. Under high temperature conditions, the heat of the battery module 30 is taken away by the heat exchange medium to reduce the temperature of the battery module 30. Under low temperature conditions, the heat exchange medium is used to heat the battery module 30 so that the battery module 30 can work normally.

[0085] In some embodiments, a thermally conductive adhesive layer (not shown) is disposed on the battery module 30 , and the thermally conductive adhesive layer fixedly connects the battery module 30 and the bottom wall of the accommodating space Q1 .

[0086] Specifically, when the battery module 30 is placed on the partition plate 21 , the battery module 30 is thermally bonded to the partition plate 21 , and when the battery module 30 is placed on the bottom plate 11 , the battery module 30 is thermally bonded to the bottom plate 11 .

[0087] The provision of the thermally conductive adhesive layer not only enhances the structural stability of the battery module 30 , but also enables heat conduction between the battery module 30 and the partition plate 21 / bottom plate 11 , so that the heat exchange channel and the battery module 30 can effectively exchange heat.

[0088] In some embodiments, a plug-in assembly 40 is disposed on the outer box 10 , and the plug-in assembly 40 is connected to the circuits of all battery modules 30 for plugging in external circuits.

[0089] The plug-in assembly 40 is connected to the battery module 30 circuit, which includes wires, signal wires, etc. The wires are used to electrically connect the battery cells 32 to the external high-voltage circuit to exchange energy with the outside. The signal wires are used to connect the battery module 30 for collecting information such as the temperature, voltage, and current of the battery cells 32 to the external low-voltage communication line to exchange information with the outside.

[0090] In this way, when the battery system 100 is in use, it is not necessary to connect each battery module 30 individually to an external circuit, but this can be achieved through the plug-in assembly 40 , thereby simplifying the use of the battery system 100 .

[0091] Generally, the plug-in assembly 40 can be exposed outside the outer box 10 to be plugged with an external circuit. Specifically, the plug-in assembly 40 has a plug-in connector for plugging with an external circuit, and the plug-in connector can be a female plug-in connector or a male plug-in connector.

[0092] In some embodiments, reference Figure 7All the battery cells 32 of each battery module 30 are arranged horizontally side by side. The binding part 31 includes binding strips 31a and end plates 31b, and the end plates 31b are arranged at both ends of the side-by-side direction of all the battery cells 32. All the battery cells 32 and the end plates 31b together constitute the bound part 31, and the binding strips 31a are wound around the side circumference of the bound part 31 in the horizontal direction to bind the bound part 31 tightly.

[0093] It is easy to understand that when the battery module 30 is placed in the accommodation space Q1, the parallel directions of the battery cells 32 of each battery module 30 are parallel to each other. In each battery module 30, end plates 31b are provided at both ends of the parallel battery cells 32. The contact area between the end plates 31b and the battery cells 32 at both ends is large, and the bundling effect is better.

[0094] The end plates 31b and the battery cells 32 are arranged in sequence along the corresponding parallel direction to form the bound portion 31. The binding strips 31a can be flexible ropes, rigid long strips, etc., which are wrapped around the side circumference of the bound portion 31. At this time, in each battery module 30, the two ends of the battery cells 32 in the vertical direction are not covered or bound by the binding portion, which can greatly simplify the structure of the battery module 30, avoid the functional duplication between the structure of the battery module 30 and the structure of the outer box 10, and reduce the structural redundancy of the battery system 100.

[0095] In a further embodiment, in combination Figure 4 , Figure 5 and Figure 7 The end plate 31b is provided with a vertically arranged connection hole b1, and the end plate 31b is fixedly connected to the bracket assembly 20 or the outer box 10 via a fastener penetrating the connection hole b1.

[0096] Specifically, when the battery module 30 is supported on the partition plate 21, the end plate 31b is fixed to the partition plate 21 through the connection hole b1 provided by the third fastener 26. When the battery module 30 is supported on the bottom plate 11, the end plate 31b is fixed to the bottom plate 11 through the connection hole b1 provided by the third fastener 26.

[0097] At this time, the connection hole b1 on the end plate 31b of the battery module 30 can also be used to install the third fastener 26. The battery module 30 is locked on the bracket assembly 20 or the outer box 10 through the third fastener 26, which greatly improves the installation stability of the battery module 30.

[0098] Alternatively, there may be a plurality of connection holes b1 on the end plate 31 b , with a connection hole b1 being provided on each end plate 31 b at both ends of the battery module 30 , or a connection hole b1 being provided on only one end plate 31 b .

[0099] In a specific embodiment of the present application, the bracket assembly 20 includes a partition plate 21, which divides the accommodating chamber Q into two layers of accommodating spaces Q1. The bracket assembly 20 also includes a support beam 22 and a support block 23. A support beam 22 is provided in each layer of accommodating space Q1. The support beam 22 of the lower accommodating space Q1 is provided on the bottom plate 11 of the outer box 10, and the support beam 22 of the upper accommodating space Q1 is provided on the partition plate 21. A support block 23 is provided between the support beam 22 of the lower accommodating space Q1 and the partition plate 21. The support beam 22 supports the partition plate 21 through the support block 23. The support beam 22 of the upper accommodating space Q1 is spaced from the box cover 13 of the outer box 10. A plurality of support beams 22 of each layer of accommodating space Q1 are arranged in a crisscross manner to separate each layer of accommodating space Q1 into a plurality of sub-cavities Q11, and a plurality of battery modules 30 can be placed in each sub-cavity Q11. The end plate 31b on the battery module 30 is fixedly connected to the base plate 11 or the partition plate 21 via a third fastener 26, the support block 23 is fixedly connected to the support beam 22 via a first fastener 24, and is fixedly connected to the partition plate 21 and the support beam 22 located in the upper accommodating space Q1 via a second fastener 25.

[0100] In addition, the embodiment of the present application further provides an electric device, which includes the battery system 100 of the above embodiment, and the battery system 100 is used to provide electric energy. The electric device includes all the above beneficial effects.

[0101] The power-consuming device may be a vehicle, specifically a commercial vehicle. Of course, the power-consuming device may also be other devices that need to be equipped with a power supply, which is not limited here.

[0102] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0103] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A battery system (100), characterized in that: The battery system (100) comprises: An outer box (10) is formed with a receiving cavity (Q); A bracket assembly (20) is disposed in the accommodating cavity (Q) and divides the accommodating cavity (Q) into at least two layers of accommodating spaces (Q1) arranged in sequence in the height direction (X) of the outer box (10); and A plurality of groups of battery modules (30), each group of the battery modules (30) comprising a binding portion (31) and a plurality of battery cells (32), the binding portion (31) binding the plurality of battery cells (32) together; at least one group of the battery modules (30) is arranged in each layer of the accommodating space (Q1).

2. The battery system (100) according to claim 1, characterized in that: The support assembly (20) comprises a partition plate (21), and each two adjacent layers of the accommodating spaces (Q1) are divided up and down by the partition plate (21); The support assembly (20) further comprises a support beam (22), wherein the support beam (22) is arranged in each layer of the accommodating space (Q1), and the support beam (22) supports the partition plate (21) located above the support beam (22).

3. The battery system (100) according to claim 2, characterized in that: The support beam (22) is spaced apart from the partition plate (21) located above the support beam (22) to form an installation space (r); The bracket assembly (20) comprises a support block (23), wherein the support block (23) is arranged in the installation space (r), one end of the support block is fixedly connected to the support beam (22), and the other end of the support block is supported and connected to the partition plate (21); The support block (23) and the support beam (22), as well as the support block (23) and the partition plate (21) are all firmly connected.

4. The battery system (100) according to claim 3, characterized in that: A plurality of the support beams (22) are arranged in each layer of the accommodating space (Q1), and all the support beams (22) are arranged in a staggered manner and divide the accommodating space (Q1) in which they are located to form a plurality of independently arranged sub-cavities (Q11).

5. The battery system (100) according to claim 2, characterized in that: A convex edge (14) is provided on the inner wall of the side periphery of the outer box (10), and the partition plate (21) is supported on the convex edge (14).

6. The battery system (100) according to claim 2, characterized in that: The outer box (10) comprises a bottom plate (11) and a box cover (13), wherein the box cover (13) and the bottom plate (11) are arranged with a relative spacing in a height direction (X) of the outer box (10), and the accommodating cavity (Q) is located between the bottom plate (11) and the box cover (13); The support beam (22) of the accommodating space (Q1) at the bottom layer is arranged on the bottom plate (11); and / or the support beam (22) of the accommodating space (Q1) at the top layer is spaced apart from the top inner wall of the box cover (13); and / or a heat exchange channel for circulating a heat exchange medium is formed in at least one of the bottom plate (11) and the partition plate (21).

7. The battery system (100) according to claim 1, characterized in that: A heat-conducting adhesive layer is provided on the battery module (30), and the heat-conducting adhesive layer fixedly connects the battery module (30) and the bottom wall of the accommodating space (Q1).

8. The battery system (100) according to claim 1, characterized in that: The outer box (10) is provided with a plug-in assembly (40), and the plug-in assembly (40) is connected to the circuits of all the battery modules (30) and is used for plugging in external circuits.

9. The battery system (100) according to claim 1, characterized in that: All of the battery cells (32) of each group of the battery modules (30) are arranged horizontally side by side; The binding portion (31) comprises a binding strip (31a) and an end plate (31b), wherein the end plate (31b) is arranged at both ends of all the battery cells (32) in a parallel direction; all the battery cells (32) and the end plate (31b) together constitute a bound portion (31), and the binding strip (31a) is wound around the side circumference of the bound portion (31) in a horizontal direction to tightly bind the bound portion (31); The end plate (31b) is provided with a vertically arranged connection hole (b1), and the end plate (31b) is fixedly connected to the bracket assembly (20) or the outer box (10) via a fastener penetrating the connection hole (b1).

10. An electrical device, characterized in that: The invention comprises a battery system as claimed in any one of claims 1 to 9, wherein the battery system is used to provide electrical energy.

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