Battery pack and energy storage system

Abstract

The embodiment of the invention provides a battery pack and an energy storage system, and relates to the technical field of energy storage. The battery pack comprises a battery cell, a bottom plate, an end plate, a side plate, a bracket and an upper cover, the end plate and the side plate are both vertically arranged on the bottom plate, the battery cells are arranged on the bottom plate and located in a space defined by the end plate and the side plate, the support is arranged at the ends, away from the bottom plate, of the end plate and the side plate, the support is provided with a battery connection system CCS assembly, the CCS assembly comprises series rows and output rows, every two battery cells are electrically connected through one series row, and the output rows are electrically connected with the end plate and the side plate. The output bar is electrically connected with the battery cell, the output bar penetrates through the side wall of the support and extends out of the side wall of the support, and the upper cover is arranged on the support. According to the battery pack disclosed by the invention, the step of forming a module by the battery cells is omitted, and the battery cells are directly packaged in the box body consisting of the bottom plate, the end plates, the side plates, the bracket and the upper cover, so that the assembly process of the battery pack is simplified, and the volume energy density of the battery pack is improved.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a battery pack and an energy storage system. Background Art

[0002] An energy storage system is usually composed of multiple battery packs, which are the core energy storage units of the energy storage system. Battery packs are usually assembled from components such as battery cells.

[0003] The traditional way of assembling battery packs is usually to first assemble the cells into modules, and then encapsulate the assembled modules in a box. This assembly method has many steps and the volume energy density of the battery pack is low. Summary of the invention

[0004] The embodiments of the present application provide a battery pack and an energy storage system to solve the problem that the battery pack assembly method has many steps and low volume energy density.

[0005] On the one hand, an embodiment of the present application provides a battery pack, including a battery cell, a bottom plate, an end plate, a side plate, a bracket and an upper cover. The end plate and the side plate are both vertically arranged on the bottom plate, the battery cell is arranged on the bottom plate, and the battery cell is located in the space surrounded by the end plate and the side plate, the bracket is arranged at one end of the end plate and the side plate away from the bottom plate, and a battery connection system CCS component is arranged on the bracket, and the CCS component includes a series row and an output row, and each two battery cells are electrically connected through one of the series rows, and the output row is electrically connected to the battery cell, and the output row extends through the side wall of the bracket to the outside of the side wall of the bracket, and the upper cover is arranged on the bracket.

[0006] In a possible embodiment, grooves are provided on the base plate and the bracket, the end plate is clamped in the grooves of the base plate and the bracket, the side plate is clamped in the grooves of the base plate and the bracket, and sealing strips are provided on the surfaces of the end plate and the side plate that are parallel to the base plate; the upper cover is clamped in the groove of the bracket, and a sealing strip is provided on the surface of the upper cover that contacts the bottom surface of the groove of the bracket; the end plate and the side plate are fixedly connected to the base plate.

[0007] In a possible implementation manner, the side edges of the end plate and the side plate are sealed and connected by using a sealant, and a binding belt is provided around the outer sides of the end plate and the side plate.

[0008] In a possible embodiment, the CCS component also includes a flexible circuit board and a temperature sensor, wherein the temperature sensor is connected across the series row and the flexible circuit board, and the temperature sensor is used to detect the temperature of the battery cell. The flexible circuit board passes through the side wall of the bracket and extends outside the side wall of the bracket, and the position where the flexible circuit board passes through the side wall of the bracket is sealed with a sealant.

[0009] In a possible implementation, the battery pack further includes a power plug and a connection bar, the output bar is connected to the connection bar, the connection bar is connected to the power plug, and the position where the output bar passes through the side wall of the bracket is sealed with a sealant.

[0010] In a possible implementation, the battery pack further includes a battery management system BMS component and a communication plug.

[0011] The portion of the flexible circuit board extending outside the side wall of the bracket is electrically connected to the BMS component, and the BMS component is electrically connected to the communication plug.

[0012] In a possible implementation, the BMS assembly includes a BMS circuit board and a BMS bracket.

[0013] The BMS bracket is fixedly connected to the bottom plate, and the BMS bracket is arranged on a side of the end plate away from the battery cell, and the BMS circuit board is arranged on the BMS bracket.

[0014] In a possible implementation, the battery pack further includes a first shell.

[0015] The BMS component, the portion of the flexible circuit board extending outside the side wall of the bracket, and the portion of the output row extending outside the side wall of the bracket are arranged in the first shell.

[0016] In a possible implementation manner, the base plate has a cooling channel, and a coolant is arranged in the cooling channel.

[0017] On the other hand, an embodiment of the present application provides an energy storage system, including the battery pack as described above.

[0018] The embodiment of the present application provides a battery pack and energy storage system, including end plates and side plates both vertically arranged on the bottom plate, battery cells arranged on the bottom plate, and the battery cells are located in the space surrounded by the end plates and side plates, a bracket is arranged at one end of the end plates and side plates away from the bottom plate, and a battery connection system CCS component is arranged on the bracket, the CCS component includes a series row and an output row, each two battery cells are electrically connected through a series row, the output row is electrically connected to the battery cell, the output row extends through the side wall of the bracket to the outside of the side wall of the bracket, and the upper cover is arranged on the bracket. The assembly of this battery pack and energy storage system omits the step of assembling the battery cells into modules, and directly encapsulates the battery cells in a box body composed of the bottom plate, end plates, side plates, brackets and upper covers, which simplifies the assembly process of the battery pack and energy storage system, and improves the volume energy density of the battery pack and energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0020] Figure 1 A schematic diagram of the structure of a battery pack provided in an embodiment of the present application;

[0021] Figure 2 for Figure 1 A schematic diagram of the structure of the battery pack after removing the first shell;

[0022] Figure 3 for Figure 1 A partial schematic diagram of the battery pack with the upper cover removed;

[0023] Figure 4 for Figure 1 A schematic diagram of the structure of the bracket in FIG.

[0024] Figure 5 for Figure 1 A schematic diagram of the structure of the bottom plate in FIG.

[0025] Figure 6 for Figure 1 A schematic diagram of the structure of the upper cover in FIG.

[0026] Figure 7 for Figure 1 Schematic diagram of the structure of the end plate, side plate and bottom plate;

[0027] Figure 8 for Figure 1 Schematic diagram of the structure of the end plate, side plate, bottom plate and battery cell;

[0028] Fig. 9 for Figure 1 A front view of the battery pack in FIG.

[0029] Fig.10 for Figure 1 A side view of a battery pack in FIG.

[0030] Fig.11 for Figure 1 A top view of the battery pack in Figure 1.

[0031] Description of reference numerals:

[0032] 10-upper cover; 20-battery cell; 30-bracket; 31-CCS assembly; 301-series row; 302-output row; 303-flexible circuit board; 304-temperature sensor; 40-end plate; 50-side plate; 60-bottom plate; 70-binding strap; 80-first shell; 801-power plug; 802-communication plug; 803-connection row; 804-BMS circuit board; 805-BMS bracket; 81-BMS assembly. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0034] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0035] In this application, unless otherwise clearly specified and limited, the terms "installation", "connection", "fixation" 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, an electrical connection, or communication with each other; 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.

[0036] In the present application, unless otherwise clearly specified and limited, a first feature being “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 being “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 being “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.

[0037] In the above description, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0038] In the design process of the battery pack, optimizing the structural design of the battery pack can simplify the production process, reduce the assembly steps, and thus improve production efficiency. The traditional battery pack assembly method is to first assemble the battery cells into modules, and then encapsulate the assembled modules in a box, which usually consists of a bottom plate and a top cover. This assembly method has many steps and a complicated production process, resulting in low production efficiency, and the volume energy density of the battery pack obtained by this assembly method is low.

[0039] In order to solve the above problems, an embodiment of the present application provides a battery pack, including battery cells, a bottom plate, an end plate, a side plate, a bracket and an upper cover. The end plate and the side plate are both vertically arranged on the bottom plate, the battery cells are arranged on the bottom plate, and the battery cells are located in the space surrounded by the end plate and the side plate, the bracket is arranged at one end of the end plate and the side plate away from the bottom plate, and a battery connection system CCS component is arranged on the bracket, and the CCS component includes a series row and an output row, and each two battery cells are electrically connected through a series row, and the output row is electrically connected to the battery cell, and the output row extends through the side wall of the bracket to the outside of the side wall of the bracket, and the upper cover is arranged on the bracket. The battery pack provided in this embodiment omits the step of assembling the battery cells into modules, and directly encapsulates the battery cells in a box body composed of a bottom plate, an end plate, a side plate, a bracket and an upper cover, which simplifies the assembly process of the battery pack and improves the volume energy density of the battery pack.

[0040] The battery pack and energy storage system provided in the embodiments of the present application are described in detail below in conjunction with specific embodiments.

[0041] like Figures 1 to 11 As shown, the embodiment of the present application provides a battery pack, including a battery cell 20, a bottom plate 60, an end plate 40, a side plate 50, a bracket 30 and an upper cover 10. The end plate 40 and the side plate 50 are both vertically arranged on the bottom plate 60, the battery cell 20 is arranged on the bottom plate 60, and the battery cell 20 is located in the space surrounded by the end plate 40 and the side plate 50, the bracket 30 is arranged at one end of the end plate 40 and the side plate 50 away from the bottom plate 60, and a battery connection system (Cell Connection System, CCS) component 31 is arranged on the bracket 30, and the CCS component 31 includes a series row 301 and an output row 302, each two battery cells 20 are electrically connected through a series row 301, and the output row 302 is electrically connected to the battery cell 20, and the output row 302 passes through the side wall of the bracket 30 and extends to the outside of the side wall of the bracket 30, and the upper cover 10 is arranged on the bracket 30.

[0042] In a possible implementation, the shape of the end plate 40, the side plate 50, and the bottom plate 60 may be a rectangle. Figure 7 As shown, the length direction of the bottom plate 60 is the X-axis direction, and the width direction of the bottom plate 60 is the Y-axis direction; the length direction of the end plate 40 is along the Y-axis direction, and the width direction of the end plate 40 is along the Z-axis direction; the length direction of the side plate 50 is in the X-axis direction, and the width direction of the side plate 50 is in the Z-axis direction. The X-axis, Y-axis and Z-axis are perpendicular to each other. The two end plates 40 are arranged opposite to each other, and the two side plates 50 are arranged opposite to each other. The wide sides of the end plates 40 are connected to the wide sides of the side plates 50, and the two end plates 40 and the two side plates 50 enclose a rectangular space. In the battery pack, the end plates 40, the side plates 50, and the bottom plate 60 can be used to fix and support the battery cells 20. The battery cells 20 can be arranged close to the end plates 40 and the side plates 50 to ensure that the position of the battery cells 20 in the battery pack is stable. In addition, the end plates 40, the side plates 50, and the bottom plate 60 can provide physical protection to prevent damage to the battery cells 20 from the external environment, such as dust, moisture and mechanical shock.

[0043] For example, Figure 8 As shown, the battery pack includes a plurality of battery cells 20, and the plurality of battery cells 20 are sequentially placed along the length direction of the side plate 50 to form a row of battery cells 20. Multiple rows of battery cells 20 can be sequentially placed along the length direction of the end plate 40. The battery cells 20 are located in the space surrounded by the end plate 40 and the side plate 50, and the side where the positive and negative terminals of the battery cells 20 are located is the side away from the bottom plate 60. Optionally, the battery cells 20 and the bottom plate 60 can be connected by bonding or welding.

[0044] For example, Figure 3As shown, the length direction of the bracket 30 is the X-axis direction, and the width direction of the bracket 30 is the Y-axis direction; the bracket 30 is arranged at one end of the end plate 40 and the side plate 50 away from the bottom plate 60, the long side of the bracket 30 is connected to the long sides of the two side plates 50, and the wide side of the bracket 30 is connected to the long sides of the two end plates 40.

[0045] For example, Figure 3 As shown, a battery connection system CCS component 31 is provided on the bracket 30, and the CCS component 31 includes a plurality of series rows 301 and two output rows 302. Each series row 301 electrically connects two battery cells 20, and all battery cells 20 in the battery pack are connected in series through the series row 301 to form a complete battery pack, which has a positive electrode and a negative electrode. The series row 301 can be made of metal, for example, the series row 301 can be a series aluminum row. The output row 302 is used for power output in the battery pack, and is mainly responsible for transmitting the power generated by the battery pack to the load or other power equipment, such as an inverter, a distribution system, etc. The output row 302 can be made of metal, such as copper. One end of an output row 302 is connected to the positive electrode of the battery pack, and one end of another output row 302 is connected to the negative electrode of the battery pack. The part of the output row 302 connected to the positive and negative electrodes of the battery pack is arranged inside the space enclosed by the bracket 30. The output row 302 extends through the side wall of the bracket 30 to the outside of the side wall of the bracket 30. Optionally, the position where the output row 302 passes through the side wall of the bracket 30 can be sealed with a sealant.

[0046] For example, Figure 6 As shown, the shape of the upper cover 10 can be a rectangle. The length direction of the upper cover 10 is the X-axis direction, and the width direction of the upper cover 10 is the Y-axis direction. Figure 1 As shown, the upper cover 10 is arranged on the bracket 30. The upper cover 10 and the bracket 30 may be connected by using a sealing strip and a groove for clamping.

[0047] The battery pack provided in this embodiment includes a battery cell 20, a bottom plate 60, an end plate 40, a side plate 50, a bracket 30 and an upper cover 10. The end plate 40 and the side plate 50 are vertically arranged on the bottom plate 60, the battery cell 20 is arranged on the bottom plate 60, and the battery cell 20 is located in the space surrounded by the end plate 40 and the side plate 50, the bracket 30 is arranged at one end of the end plate 40 and the side plate 50 away from the bottom plate 60, and the upper cover 10 is arranged on the bracket 30 to form the main frame of the battery pack, and then a battery connection system CCS component 31 is arranged on the bracket 30, and the CCS component 31 includes a series row 301 and an output row 302, and every two battery cells 20 are electrically connected through a series row 301, and the output row 302 is electrically connected to the battery cell 20, and the output row 302 passes through the side wall of the bracket 30 and extends to the outside of the side wall of the bracket 30 to complete the connection of the battery pack. The assembly of this battery pack omits the step of assembling the battery cells 20 into modules, and directly encapsulates the battery cells 20 in a box body composed of a bottom plate 60, an end plate 40, a side plate 50, a bracket 30 and an upper cover 10, thereby simplifying the assembly process of the battery pack, improving the volume energy density of the battery pack, and saving costs.

[0048] In the related art, the battery cells are assembled into modules, and the assembled modules are then packaged in a box, which is usually composed of a bottom plate and an upper cover. The bottom plate and the upper cover are sealed with a sealing foam, which requires space to be reserved in the box, further resulting in a low volume energy density of the battery pack. To solve this problem, in the embodiment of the present application, the sealing between the bottom plate 60, the end plate 40, the side plate 50, the bracket 30 and the upper cover 10 is achieved by snapping a sealing strip with a groove. This is explained below.

[0049] In a possible embodiment, grooves are provided on the bottom plate 60 and the bracket 30, the end plate 40 is clamped in the grooves of the bottom plate 60 and the bracket 30, the side plate 50 is clamped in the grooves of the bottom plate 60 and the bracket 30, and a sealing strip is provided on the surface of the end plate 40 and the side plate 50 parallel to the bottom plate 60; the upper cover 10 is clamped in the groove of the bracket 30, and a sealing strip is provided on the surface of the upper cover 10 that contacts the bottom surface of the groove of the bracket 30; the end plate 40 and the side plate 50 are both fixedly connected to the bottom plate 60.

[0050] For example, Figure 7As shown, a groove is provided at the position where the bottom plate 60 is connected to the end plate 40, a sealing strip is provided on the surface of the end plate 40 facing the bottom plate 60, the end plate 40 is clamped in the groove of the bottom plate 60, and the clamping position is sealed by the sealing strip. A groove is provided at the position where the bottom plate 60 is connected to the side plate 50, a sealing strip is provided on the surface of the side plate 50 facing the bottom plate 60, the side plate 50 is clamped in the groove of the bottom plate 60, and the clamping position is sealed by the sealing strip. On this basis, optionally, both the end plate 40 and the side plate 50 are fixedly connected to the bottom plate 60, for example, both the end plate 40 and the side plate 50 can be screwed to the bottom plate 60, so that the connection between the end plate 40 and the side plate 50 and the bottom plate 60 is more secure.

[0051] For example, Figure 1 and Figure 3 As shown, a groove is provided on the surface of the bracket 30 that contacts the upper cover 10, and a sealing strip is provided on the surface of the upper cover 10 that contacts the bracket 30, and the bracket 30 and the upper cover 10 are connected by snapping.

[0052] For example, Figure 3 As shown, a groove is provided at the position where the bracket 30 is connected to the end plate 40, a sealing strip is provided on the surface of the end plate 40 away from the bottom plate 60, the end plate 40 is clamped in the groove of the bracket 30, and the clamping position is sealed by the sealing strip. A groove is provided at the position where the bracket 30 is connected to the side plate 50, a sealing strip is provided on the surface of the side plate 50 away from the bottom plate 60, the side plate 50 is clamped in the groove of the bracket 30, and the clamping position is sealed by the sealing strip.

[0053] The battery pack provided in this embodiment is provided with grooves on the bottom plate 60 and the bracket 30, and sealing strips are provided on the end plate 40, the side plate 50 and the upper cover 10. The sealing strips and the grooves are engaged with each other to complete the sealed connection between the upper cover 10 and the bracket 30, the bracket 30 and the end plate 40, the bracket 30 and the side plate 50, the end plate 40 and the bottom plate 60, and the side plate 50 and the bottom plate 60. Compared with the method of sealing the traditional battery by sealing foam, the space occupied by the sealing is reduced, and the volume energy density of the battery pack is improved.

[0054] In a possible implementation, the side edges of the end plate 40 and the side plate 50 are sealed and connected by a sealant, and a binding belt 70 is arranged around the outer side of the end plate 40 and the side plate 50. Figure 3 As shown, the wide side of the end plate 40 and the wide side of the side plate 50 are sealed by a sealant. A band 70 is used to fix the outer side of the rectangular space surrounded by the end plate 40 and the side plate 50. The material of the band 70 can be selected to be metal, such as steel.

[0055] The battery pack provided in this embodiment is sealed and connected by using sealant on the sides of the end plate 40 and the side plate 50, and a strap 70 is provided around the outer side of the end plate 40 and the side plate 50 to fix the end plate 40 and the side plate 50 and achieve a sealing effect.

[0056] Based on the above embodiments, Figure 2 and Figure 3 As shown, optionally, the CCS component 31 contained in the battery pack also includes a flexible circuit board 303 and a temperature sensor 304. The temperature sensor 304 is connected across the series row 301 and the flexible circuit board 303. The temperature sensor 304 is used to detect the temperature of the battery cell 20. The flexible circuit board 303 passes through the side wall of the bracket 30 and extends to the outside of the side wall of the bracket 30. The position where the flexible circuit board 303 passes through the side wall of the bracket 30 is sealed with a sealant.

[0057] Optionally, the battery pack further includes a battery management system (BMS) component 81 , and the portion of the flexible circuit board 303 extending outside the side wall of the bracket 30 is electrically connected to the BMS component 81 .

[0058] In the battery pack, the CCS component 31 has the function of monitoring the state of the battery cell 20. The temperature sensor 304 in the CCS component 31 can detect the temperature of the battery cell 20 in real time and transmit it to the BMS component 81 through the flexible circuit board 303. The BMS component 81 can determine whether the battery cell 20 is in an overheated state, so as to cool down the battery cell 20 in time, thereby protecting the battery cell 20 and extending the service life of the battery pack. One end of the temperature sensor 304 is connected to the series row 301, and the other end is connected to the flexible circuit board 303. The flexible circuit board 303 has certain bendability and foldability, and mainly plays a connecting role, so that the battery pack can run smoothly. The flexible circuit board 303 extends through the side wall of the bracket 30 in the opposite direction of the X-axis to the outside of the side wall of the bracket 30. The position where the flexible circuit board 303 passes through the side wall of the bracket 30 is sealed with a sealant.

[0059] The battery pack provided in this embodiment includes a CCS component 31 including a flexible circuit board 303 and a temperature sensor 304. By connecting the flexible circuit board 303 and the temperature sensor 304 in the battery pack, the temperature sensor 304 can monitor the temperature of the battery cell 20 in real time. The flexible circuit board 303 can transmit the temperature of the battery cell 20 monitored in real time by the temperature sensor 304 in time to avoid overheating of the battery cell 20, improve the safety of the battery pack, and extend the service life of the battery pack.

[0060] Based on the above embodiment, the battery pack further includes a power plug 801 and a connection row 803, the output row 302 is connected to the connection row 803, the connection row 803 is connected to the power plug 801, and the position where the output row 302 passes through the side wall of the bracket 30 is sealed with sealant.

[0061] For example, Figure 2As shown, in the battery pack, the power plug 801 is used to transmit electrical energy, connect the battery pack, inverter, charging equipment, etc., to ensure efficient transmission and management of electrical energy. For example, the power plug 801 can select a power aviation plug. The output row 302 is connected to the connecting row 803, and the connection method can be screwed. The connecting row 803 is connected to the power plug 801, and the connection method can be screwed. The output row 302 passes through the side wall of the bracket 30 in the opposite direction of the X-axis, and the position where the output row 302 passes through the side wall of the bracket 30 is sealed with a sealant.

[0062] The battery pack provided in this embodiment also includes a power plug 801 and a connecting bar 803, an output bar 302, and the output bar 302 is connected to the connecting bar 803, and the connecting bar 803 is connected to the power plug 801, so as to realize efficient power transmission by using the connecting bar 803.

[0063] On the basis of the above embodiment, the battery pack further includes a communication plug 802 , and the BMS component 81 is electrically connected to the communication plug 802 .

[0064] For example, in a battery pack, such as Figure 2 As shown, the communication plug 802 is mainly used for signal transmission, such as transmitting monitoring data such as voltage, current, and temperature. For example, the communication plug 802 can be a communication aviation plug. The portion of the flexible circuit board 303 extending in the opposite direction of the X-axis to the outside of the side wall of the bracket 30 is called the male end. The BMS component 81 contains a female end, and the flexible circuit board 303 and the BMS component 81 are electrically connected by connecting the male end and the female end. The BMS component 81 is electrically connected to the communication plug 802, and the two can be connected by a wiring harness.

[0065] The battery pack provided in this embodiment further includes a BMS component 81 and a communication plug 802 . Signal transmission of the battery pack is achieved by electrically connecting the flexible circuit board 303 to the BMS component 81 and the BMS component 81 to the communication plug 802 .

[0066] By way of example, the BMS assembly 81 includes a BMS circuit board 804 and a BMS bracket 805 .

[0067] The BMS bracket 805 is fixedly connected to the bottom plate 60 , and the BMS bracket 805 is disposed on a side of the end plate 40 away from the battery cell 20 , and the BMS circuit board 804 is disposed on the BMS bracket 805 .

[0068] like Figure 2 As shown, the BMS bracket 805 is fixedly connected to the bottom plate 60, and can be screwed or welded. The BMS circuit board 804 is arranged on the BMS bracket 805, and can be screwed or welded.

[0069] Based on the above embodiments, Figure 1 and Figure 2As shown, the battery pack further includes a first shell 80. The BMS assembly 81, the portion of the flexible circuit board 303 extending outside the side wall of the bracket 30, and the portion of the output row 302 extending outside the side wall of the bracket 30 are arranged in the first shell 80. The connection method between the first shell 80 and the end plate 40 can be screwed.

[0070] The first shell 80 of the battery pack provided in this embodiment arranges the BMS component 81, the portion of the flexible circuit board 303 extending outside the side wall of the bracket 30, and the portion of the output row 302 extending outside the side wall of the bracket 30 inside the first shell 80, and provides physical protection through the first shell 80 to prevent the external environment from damaging the various parts inside the first shell 80.

[0071] Based on the above embodiment, the bottom plate 60 of the battery pack has a cooling channel, and a coolant is arranged in the cooling channel. The heat generated by the battery cell 20 is transferred to the outside of the battery pack through the high heat capacity and high heat conductivity of the coolant, so that the battery cell 20 is cooled to ensure that the battery pack operates within a safe temperature range.

[0072] The bottom plate 60 of the battery pack provided in this embodiment dissipates heat from the battery cells 20 through the coolant in the cooling channel, effectively absorbs and transfers heat, thereby significantly reducing the temperature of the battery cells 20 and extending the service life of the battery pack.

[0073] Figures 9 to 11 The front view, side view and top view of the battery pack provided in this embodiment are respectively illustrated. The upper cover 10, bracket 30, end plate 40, bottom plate 60, first shell 80, power plug 801 and communication plug 802 illustrated in the figure are all referred to the description of the previous embodiment.

[0074] An embodiment of the present application provides an energy storage system, including a battery pack.

[0075] Among them, the battery pack in this embodiment has the same structure as the battery pack provided in any of the above embodiments, and can bring the same or similar technical effects, which will not be described one by one here, and the details can be referred to the description of the above embodiments.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application 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 application.

Claims

1. A battery pack, characterized in that: Including battery cells, bottom plate, end plate, side plate, bracket and upper cover; The end plate and the side plate are both vertically arranged on the bottom plate, the battery cell is arranged on the bottom plate, and the battery cell is located in the space enclosed by the end plate and the side plate, the bracket is arranged at one end of the end plate and the side plate away from the bottom plate, and a battery connection system CCS component is arranged on the bracket, and the CCS component includes a series row and an output row, each two battery cells are electrically connected through a series row, and the output row is electrically connected to the battery cell, and the output row extends through the side wall of the bracket to the outside of the side wall of the bracket, and the upper cover is arranged on the bracket.

2. The battery pack according to claim 1, characterized in that: The bottom plate and the bracket are both provided with grooves, the end plate is clamped in the grooves of the bottom plate and the bracket, the side plate is clamped in the grooves of the bottom plate and the bracket, and sealing strips are provided on the surfaces of the end plate and the side plate that are parallel to the bottom plate; the upper cover is clamped in the groove of the bracket, and a sealing strip is provided on the surface of the upper cover that contacts the bottom surface of the groove of the bracket; the end plate and the side plate are both fixedly connected to the bottom plate.

3. The battery pack according to claim 1, characterized in that: The side edges of the end plate and the side plate are sealed and connected by using sealant, and a binding belt is arranged around the outer sides of the end plate and the side plate.

4. The battery pack according to any one of claims 1 to 3, characterized in that: The CCS component also includes a flexible circuit board and a temperature sensor. The temperature sensor is connected across the series row and the flexible circuit board. The temperature sensor is used to detect the temperature of the battery cell. The flexible circuit board passes through the side wall of the bracket and extends outside the side wall of the bracket. The position where the flexible circuit board passes through the side wall of the bracket is sealed with a sealant.

5. The battery pack according to any one of claims 1 to 3, characterized in that: Also includes: A power plug and a connecting row, the output row is connected to the connecting row, the connecting row is connected to the power plug, and the position where the output row passes through the side wall of the bracket is sealed with sealant.

6. The battery pack according to claim 4, characterized in that: Also includes: Battery management system BMS components and communication plugs; The portion of the flexible circuit board extending outside the side wall of the bracket is electrically connected to the BMS component, and the BMS component is electrically connected to the communication plug.

7. The battery pack according to claim 6, characterized in that: The BMS assembly includes a BMS circuit board and a BMS bracket; The BMS bracket is fixedly connected to the bottom plate, and the BMS bracket is arranged on a side of the end plate away from the battery cell, and the BMS circuit board is arranged on the BMS bracket.

8. The battery pack according to claim 6, characterized in that: Also includes: a first shell; The BMS component, the portion of the flexible circuit board extending outside the side wall of the bracket, and the portion of the output row extending outside the side wall of the bracket are arranged in the first shell.

9. The battery pack according to claim 1, characterized in that: The bottom plate has a cooling channel, and a coolant is arranged in the cooling channel.

10. An energy storage system, characterized in that: Comprising a battery pack as described in any one of claims 1 to 9.

Images