battery pack

Abstract

According to an exemplary embodiment, a battery pack is provided. The battery pack may include: a battery pack housing including a substrate and a sidewall connected to the substrate and perpendicular to the substrate; a mounting block located on the substrate; a battery cell assembly located on the mounting block; and a cooling plate located between the substrate and the battery cell assembly. The sidewall may include a coolant inlet and a coolant outlet. The cooling plate may be connected to each of the coolant inlet and the coolant outlet.

Description

Technical Field

[0001] This disclosure relates to a battery pack. This application claims the benefit of Korean Patent Application No. 10-2024-0175456, filed on November 29, 2024, the disclosure of which is incorporated herein by reference. Background Technology

[0002] Unlike primary batteries, secondary batteries can be charged and discharged multiple times. They are widely used as a power source for various wireless devices, such as mobile phones, laptops, and cordless vacuum cleaners. Recently, due to improvements in energy density and economies of scale, the manufacturing cost per unit capacity of secondary batteries has significantly decreased, and as the driving range of battery electric vehicles (BEVs) has increased to levels comparable to those of fuel cell vehicles, the primary application of secondary batteries has shifted from mobile devices to mobility tools.

[0003] In the current trend emphasizing secondary batteries for mobility vehicles, the main directions of secondary battery technology development are cost reduction and safety improvement. Secondary batteries account for the largest proportion of BEV manufacturing costs. Therefore, compared to internal combustion engine vehicles, the most important factor in increasing BEV market share is the production cost of secondary batteries. Cost reduction can be achieved by reducing raw materials, decreasing the number of production process steps, and shortening takt time. The safety of secondary batteries is paramount, as it is directly related to the lives of passengers in the mobility vehicle. A key task in improving secondary battery safety is providing cooling solutions for the battery pack. Summary of the Invention

[0004] Technical issues

[0005] The technical problem to be solved by the present invention is to provide a battery pack with improved safety.

[0006] Technical solution

[0007] According to an exemplary embodiment of this disclosure, a battery pack is provided to address the aforementioned problems. The battery pack may include: a battery pack housing, the battery pack housing including a substrate and a sidewall connected to the substrate and perpendicular to the substrate; a mounting block located on the substrate; a battery cell assembly located on the mounting block; and a cooling plate located between the substrate and the battery cell assembly. The sidewall may include a coolant inlet and a coolant outlet. The cooling plate may be connected to the coolant inlet and the coolant outlet, respectively.

[0008] The battery pack may further include: a first pipe connecting the cooling plate and the coolant inlet; and a second pipe connecting the cooling plate and the coolant outlet.

[0009] Each of the first and second conduits may be located between the battery cell assembly and the sidewall.

[0010] The battery pack may further include: a first connector connecting the coolant inlet and the first pipe; and a second connector connecting the coolant outlet and the second pipe.

[0011] The melting temperature of the first connector can be lower than the melting temperature of the coolant inlet.

[0012] The melting temperature of the first connector can be lower than the melting temperature of the first pipe.

[0013] The melting temperature of the first connector can be above 100°C. The melting temperature of the first connector can be below 300°C. The melting temperature of the second connector can be above 100°C. The melting temperature of the second connector can be below 300°C.

[0014] The sidewall may further include a first cooling line and a second cooling line providing a pathway for coolant movement. The coolant inlet may be connected to the first cooling line. The coolant outlet may be connected to the second cooling line.

[0015] The battery pack housing may further include a central beam located on the substrate parallel to the sidewalls. The cooling plate may be connected to the central beam via a connector.

[0016] The central beam may include a slot. Each of the joints can be inserted into the slot of each of the central beams.

[0017] The melting temperature of each of the joints may be lower than the melting temperature of the coolant inlet.

[0018] The vertical distance between the coolant inlet and the substrate can be greater than the vertical distance between the cooling plate and the substrate. The vertical distance between the coolant outlet and the substrate can be greater than the vertical distance between the cooling plate and the substrate.

[0019] The cooling plate may be spaced apart from the substrate.

[0020] The battery pack housing may also include a crossbeam perpendicular to the sidewall and located on the substrate. The cooling plate may be connected to the crossbeam via a connector.

[0021] The cooling plate may include multiple holes. Each mounting block may pass through each of the multiple holes to support the battery cell assembly.

[0022] Beneficial effects

[0023] According to an exemplary embodiment of this disclosure, by providing a cooling plate for each battery cell assembly and allowing coolant to flow into the housing space of a battery cell assembly that has already caught fire, heat propagation and thermal runaway of the battery pack can be prevented.

[0024] The effects obtainable from the exemplary embodiments of this disclosure are not limited to those described above, and other effects not mentioned can be clearly derived and understood by those skilled in the art to which the exemplary embodiments of this disclosure pertain. In other words, those skilled in the art can also derive unexpected effects from practicing the exemplary embodiments of this disclosure. Attached Figure Description

[0025] Figure 1 This is a top view showing a battery pack according to an exemplary embodiment.

[0026] Figure 2 This is a top view showing a battery pack according to an exemplary embodiment.

[0027] Figure 3 This is a cross-sectional view showing a battery pack according to an exemplary embodiment.

[0028] Figure 4 This is a cross-sectional view showing a battery pack according to an exemplary embodiment.

[0029] Figure 5 This is a cross-sectional view showing a battery pack according to an exemplary embodiment.

[0030] Figure 6 This is a cross-sectional view showing a battery pack according to an exemplary embodiment.

[0031] Figure 7 This is a top view showing a battery pack according to an exemplary embodiment.

[0032] Figure 8 This is a cross-sectional view showing a battery pack according to an exemplary embodiment.

[0033] Figure 9 This is a cross-sectional view showing a battery pack according to an exemplary embodiment.

[0034] Figure 10 This is a cross-sectional view showing a battery pack according to an exemplary embodiment. Detailed Implementation

[0035] The preferred embodiments of this disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that the terms and words used in this specification and claims should not be interpreted in their ordinary or dictionary sense, but rather on the basis of the inventor's ability to define the concepts of the terms in a way that best describes the principles of his disclosure, and in a sense and concept consistent with the technical concept of this disclosure.

[0036] Therefore, it should be understood that the embodiments described herein and the configurations shown in the accompanying drawings are merely the most preferred embodiments of this disclosure, and not an exhaustive list of the technical ideas of this disclosure. Various equivalents and modifications may exist that can replace these embodiments at the time of submission.

[0037] Furthermore, in describing this disclosure, specific descriptions of relevant known configurations or features will be omitted where it is believed that such specific descriptions would obscure the essence of this disclosure.

[0038] Because embodiments of this disclosure are provided to explain the disclosure more fully to those skilled in the art, the shapes and dimensions of components in the drawings may be exaggerated, omitted, or shown schematically for clarity. Therefore, the size or proportion of each component does not necessarily indicate its actual size or proportion.

[0039] (First Implementation)

[0040] Figure 1 This is a top view showing a battery pack 100 according to an exemplary embodiment. Figure 2 This is an enlarged top view showing a battery pack 100 according to an exemplary embodiment. Figure 2 It shows Figure 1 A magnified view of part P in the image.

[0041] Figure 3 This is a cross-sectional view showing a battery pack 100 according to an exemplary embodiment. Figure 3 It shows along Figure 2 A cross-sectional view taken from line A-A'. Figure 4 This is a cross-sectional view showing a battery pack 100 according to an exemplary embodiment. Figure 4 It shows along Figure 2 The cross-sectional view taken by line B-B'. Figure 5 It is along Figure 3 and Figure 4 A cross-sectional view taken from line C-C'.

[0042] Figure 6 This is a cross-sectional view of the battery pack 100 when a fire occurs in the battery cell assembly 120_1.

[0043] First, refer to Figures 1 to 5The battery pack 100 may include a battery pack housing 110, battery cell assemblies 120_1, 120_2, 120_3, 120_4, a cooling plate 130, pipes 131, 132, connectors 151, 152, and a BMS (Battery Management System) 160. The battery pack 100 may be the final form of a battery system installed in a vehicle or similar mobility device.

[0044] The battery pack housing 110 can provide space for arranging multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4. The battery pack housing 110 may include a base plate 111, a central beam 112, crossbeams 113A, 113B, 113C, and 113D, and sidewalls 114.

[0045] The two directions substantially parallel to the mounting surface 111M of the substrate 111 are defined as the X direction and the Y direction, and the direction substantially perpendicular to the mounting surface 111M of the substrate 111 is defined as the Z direction. The X, Y, and Z directions may each be substantially perpendicular to each other. Unless otherwise stated, the definitions of directions are the same for the following figures.

[0046] Each battery cell assembly 120_1, 120_2, 120_3, and 120_4 can be located on the mounting block 125. The mounting block 125 can support each battery cell assembly 120_1, 120_2, 120_3, and 120_4. The mounting block 125 can contact each battery cell assembly 120_1, 120_2, 120_3, and 120_4. When each battery cell assembly 120_1, 120_2, 120_3, and 120_4 is housed in the module frame, the mounting block 125 can contact the module frame. The mounting block 125 can be disposed on the mounting surface 111M of the substrate 111. Each battery cell assembly 120_1, 120_2, 120_3, and 120_4 can be spaced apart from the substrate 111 in the Z direction by the mounting block 125.

[0047] The cooling plate 130 may include a plurality of holes 130H. Each mounting block 125 may pass through each of the plurality of holes 130H to support each battery cell assembly 120_1, 120_2, 120_3, 120_4. The length of each of the plurality of holes 130H in the X direction may be substantially the same as the length of each mounting block 125 in the X direction. The length of each of the plurality of holes 130H in the X direction may be greater than the length of each mounting block 125 in the X direction. The length of each of the plurality of holes 130H in the Y direction may be substantially the same as the length of each mounting block 125 in the Y direction. The length of each of the plurality of holes 130H in the Y direction may be greater than the length of each mounting block 125 in the Y direction.

[0048] Sidewall 114 is connected to substrate 111 and can be substantially perpendicular to substrate 111. Sidewall 114 can extend along the edge of substrate 111. Sidewall 114 can surround central beam 112, crossbeams 113A, 113B, 113C, 113D and battery cell assemblies 120_1, 120_2, 120_3, 120_4.

[0049] The sidewall 114 may include cooling pipes 141, 142, 143, coolant inlets 145_1, 145_2, and coolant outlets 146_1, 146_2. Coolant inlets 145_1 and 146_1 may face the battery cell assembly 120_1. Coolant inlets 145_2 and 146_2 may face the battery cell assembly 120_2.

[0050] Cooling line 141 can be connected to coolant inlet 145_1. Coolant inlet 145_1 can be connected to connector 151. Connector 151 can be connected to pipe 131. Pipe 131 can be connected to cooling plate 130.

[0051] Cooling line 141 may extend in the X direction. Cooling line 141 may be embedded in sidewall 114. Connector 151 may connect coolant inlet 145_1 and pipe 131. According to an exemplary embodiment, one end of connector 151 may be inserted into coolant inlet 145_1, and the other end of connector 151 may be inserted into pipe 131. Pipe 131 may be located between sidewall 114 and battery cell assembly 120_1. Pipe 131 may extend in the Z direction.

[0052] Cooling line 141, coolant inlet 145_1, connector 151 and pipe 131 provide a pathway for coolant flow. Coolant supplied through cooling line 141 can flow through coolant inlet 145_1, connector 151 and pipe 131 to supply to cooling plate 130.

[0053] Coolant supplied to cooling plate 130 can cool battery cell assembly 120_1. According to an exemplary embodiment, cooling plate 130 may include a distribution flow path connected to conduit 131 and a plurality of cooling channels connected to the distribution flow path. Coolant introduced into cooling plate 130 can be distributed to the plurality of cooling channels via the distribution flow path. Coolant distributed to the plurality of cooling channels can flow along the plurality of cooling channels. Coolant flowing along the cooling channels can absorb heat generated from battery cell assembly 120_1 to cool battery cell assembly 120_1.

[0054] Coolant from the cooled battery cell assembly 120_1 can be discharged from the cooling plate 130. The cooling plate 130 can be connected to a pipe 132. The pipe 132 can be connected to a connector 152. The connector 152 can be connected to a coolant outlet 146_1. The coolant outlet 146_1 can be connected to a cooling line 142. Coolant from the cooled battery cell assembly 120_1 can be discharged from the cooling plate 130 through the pipe 132, connector 152, coolant outlet 146_1, and cooling line 142. The pipe 132, connector 152, coolant outlet 146_1, and cooling line 142 provide pathways for coolant flow.

[0055] Coolant discharged from the cooling plate 130 overlapping with battery cell assembly 120_1 can flow into the cooling plate overlapping with the adjacent battery cell assembly 120_2. Cooling line 142 can be connected to coolant inlet 145_2 facing battery cell assembly 120_2. Coolant outlet 146_2 facing battery cell assembly 120_2 can be connected to cooling channel 143. Coolant can cool battery cell assembly 120_2 in the same or similar manner as battery cell assembly 120_1.

[0056] A cooling plate 130 can be provided for each battery cell assembly 120_1, 120_2, 120_3, 120_4. Each battery cell assembly 120_1, 120_2, 120_3, 120_4 can be cooled by coolant flowing in the cooling plate overlapping with each battery cell assembly 120_1, 120_2, 120_3, 120_4.

[0057] Cooling plates 130 may be located between each battery cell assembly 120_1, 120_2, 120_3, 120_4 and the substrate 111. Cooling plates 130 may be spaced apart from the substrate 111 in the Z direction. According to an exemplary embodiment, each cooling plate 130 may contact each battery cell assembly 120_1, 120_2, 120_3, 120_4. When each battery cell assembly 120_1, 120_2, 120_3, 120_4 is housed in a module frame, the cooling plates 130 may contact the module frame.

[0058] The coolant inlet 145_1 can be spaced apart from the substrate 111 in the Z direction. The distance between the coolant inlet 145_1 and the substrate 111 in the Z direction can be greater than the distance between the cooling plate 130 and the substrate 111 in the Z direction. The coolant outlet 146_1 can be spaced apart from the substrate 111 in the Z direction. The distance between the coolant outlet 146_1 and the substrate 111 in the Z direction can be greater than the distance between the cooling plate 130 and the substrate 111 in the Z direction.

[0059] The coolant inlet 145_1 can be positioned in the Z direction at substantially the same level as the coolant outlet 146_1. The distance in the Z direction between the coolant inlet 145_1 and the substrate 111 can be substantially the same as the distance in the Z direction between the coolant outlet 146_1 and the substrate 111. However, the positions of the coolant inlet 145_1 and the coolant outlet 146_1 are not limited thereto. In an exemplary embodiment, the distance in the Z direction between the coolant inlet 145_1 and the substrate 111 can be greater than the distance in the Z direction between the coolant outlet 146_1 and the substrate 111. In other exemplary embodiments, the distance in the Z direction between the coolant inlet 145_1 and the substrate 111 can be less than the distance in the Z direction between the coolant outlet 146_1 and the substrate 111.

[0060] The cooling plate 130 can be connected to the center beam 112 via a connector 153. The center beam 112 may include a slot 147 for accommodating each connector 153. Although Figures 1 to 5 An embodiment in which the cooling plate 130 is connected to the central beam 120 via two connectors 153 is shown, but the number of connectors 153 is not limited to this and can be varied depending on the size of the battery cell assembly 120_1 or the structure of the battery pack 100.

[0061] The distance in the Z direction between each connector 153 and the substrate 111 can be less than the distance in the Z direction between the coolant inlet 145_1 and the substrate 111. The distance in the Z direction between each connector 153 and the substrate 111 can be less than the distance in the Z direction between the coolant outlet 146_1 and the substrate 111.

[0062] Each of connectors 151, 152, and joint 153 may comprise a fusible material. The melting temperature of connector 151 may be lower than the melting temperature of cooling line 141. The melting temperature of connector 151 may be lower than the melting temperature of coolant inlet 145_1. The melting temperature of connector 151 may be lower than the melting temperature of pipe 131. The melting temperature of connector 151 may be lower than the melting temperature of cooling plate 130.

[0063] The melting temperature of connector 152 can be lower than the melting temperature of cooling line 142. The melting temperature of connector 152 can be lower than the melting temperature of coolant outlet 146_1. The melting temperature of connector 152 can be lower than the melting temperature of pipe 132. The melting temperature of connector 152 can be lower than the melting temperature of cooling plate 130.

[0064] The melting temperature of each connector 153 may be lower than the melting temperature of each cooling line 141, 142. The melting temperature of each connector 153 may be lower than the melting temperature of the coolant inlet 145_1. The melting temperature of each connector 153 may be lower than the melting temperature of the coolant outlet 146_1. The melting temperature of each connector 153 may be lower than the melting temperature of the cooling plate 130.

[0065] According to an exemplary embodiment, each of connectors 151, 152, and connector 153 may have a melting temperature of about 90°C or higher. According to an exemplary embodiment, each of connectors 151, 152, and connector 153 may have a melting temperature of about 100°C or higher. According to an exemplary embodiment, each of connectors 151, 152, and connector 153 may have a melting temperature of about 120°C or higher. According to an exemplary embodiment, each of connectors 151, 152, and connector 153 may have a melting temperature of about 300°C or lower. According to an exemplary embodiment, each of connectors 151, 152, and connector 153 may have a melting temperature of about 200°C or lower. According to an exemplary embodiment, each of connectors 151, 152, and connector 153 may have a melting temperature of about 150°C or lower.

[0066] BMS 160 can be configured to determine whether the battery pack 100 is malfunctioning. In an exemplary embodiment, BMS 160 can be configured to determine whether the battery pack 100 is malfunctioning based on a temperature rise in each battery cell assembly 120_1, 120_2, 120_3, 120_4. The battery pack 100 may also include temperature sensors that detect the temperature of each battery cell assembly 120_1, 120_2, 120_3, 120_4. The temperature sensors can be connected to BMS 160. BMS 160 can monitor the temperature of each battery cell assembly 120_1, 120_2, 120_3, 120_4 in real time based on data collected from the sensors. BMS 160 can be configured to activate a built-in alarm system when a temperature rise above a reference temperature for each battery cell assembly 120_1, 120_2, 120_3, 120_4 is detected. This alarm system can deliver a warning to the user via visual, auditory, or communication methods.

[0067] At the same time, such as Figure 6 As shown, coolant CL can flow into the containment space of the burning battery cell assembly 120_1 to extinguish the fire that occurs in the battery cell assembly 120_1 and reduce the temperature of the battery cell assembly 120_1.

[0068] Figure 6The battery pack 100 is shown in the event of a fire in one of the battery cell assemblies 120_1, 120_2, 120_3, and 120_4. (See also: [reference to other battery packs]) Figures 1 to 6 The connectors 151, 152 and the joint 153 can be melted by the heat generated from the burning battery cell assembly 120_1.

[0069] By melting connector 151, pipe 131 can be separated from coolant inlet 145_1. By melting connector 152, pipe 132 can be separated from coolant outlet 146_1. By melting connectors 151 and 152, pipes 131 and 132 can be separated from sidewall 114. By melting joint 153, cooling plate 130 can be separated from center beam 112.

[0070] Through the melting of connectors 151, 152 and joint 153, cooling plate 130 can fall into the empty space between battery cell assembly 120_1 and substrate 111. Pipes 131 and 132 connected to cooling plate 130 can fall between sidewall 114 and battery cell assembly 120_1. Therefore, coolant CL supplied from coolant inlet 145_1 can flow into the housing space of battery cell assembly 120_1 within battery pack housing 110.

[0071] Coolant CL flowing into the housing space of battery cell assembly 120_1 can extinguish a fire occurring in battery cell assembly 120_1 and reduce the temperature of battery cell assembly 120_1. According to an exemplary embodiment, coolant inlet 145_1 can supply coolant CL to a level sufficient to immerse an unburned battery cell assembly 120_1. This prevents heat generated from a burning battery cell assembly 120_1 from spreading to adjacent battery cell assemblies and prevents thermal runaway of the battery pack 100.

[0072] Although Figure 6 An embodiment is shown in which conduits 131, 132, and cooling plate 130 are separated from sidewall 114 and center beam 112; however, the cooling method for battery cell assembly 120_1 is not limited to this. According to other exemplary embodiments, when conduits 131, 132, and cooling plate 130 are connected to sidewall 114 and center beam 112, holes can be formed in connector 151 by melting connector 151. Coolant CL can flow into the housing space of battery cell assembly 120_1 within battery pack housing 110 through the holes formed in connector 151. Coolant CL flowing out from coolant inlet 145_1 can fill the housing space of battery cell assembly 120_1 within battery pack housing 110.

[0073] According to an exemplary embodiment, BMS 160 can be configured to determine whether the battery pack 100 is abnormal based on the inflow of coolant CL into the housing space of each battery cell assembly 120_1, 120_2, 120_3, 120_4. According to an exemplary embodiment, the battery pack 100 may further include a sensor configured to detect whether coolant CL is flowing into the housing space of each battery cell assembly 120_1, 120_2, 120_3, 120_4. BMS 160 can monitor the inflow of coolant CL into the housing space of each battery cell assembly 120_1, 120_2, 120_3, 120_4 in real time based on data collected from the sensor. BMS 160 can be configured to activate a built-in alarm system when the inflow of coolant CL is detected. This alarm system can deliver a warning to the user via visual, auditory, or communication methods.

[0074] (Second Implementation)

[0075] Figure 7 This is a top view showing a battery pack 100' according to an exemplary embodiment. Figures 8 to 10 This is a cross-sectional view showing a battery pack 100' according to an exemplary embodiment. Figure 8 It shows along Figure 7 The cross-sectional view taken by line D-D'. Figure 9 It shows the along Figure 7 The cross-sectional view taken from line E-E'. Figure 10 It shows along Figure 7 The cross-sectional view taken by line F-F'.

[0076] exist Figures 7 to 10 In, it has the same Figures 1 to 6 Components with the same reference numerals in the accompanying drawings may be described using the methods given in the first embodiment, and identical descriptions will be omitted. Hereinafter, the description will focus on components of the second embodiment that differ from those of the first embodiment.

[0077] Reference Figures 7 to 10 Battery pack 100' and Figures 1 to 6 The difference in the battery pack 100 lies in the connection method between the cooling plate 130 and the battery pack housing 110.

[0078] Cooling plate 130 can be connected to sidewall 114 and crossbeams 113A and 113B respectively. Cooling plate 130 can be connected to crossbeams 113A and 113B respectively via connector 153'. Crossbeam 113A may include slot 147'. Crossbeam 113B may include slot 147'. Each connector 153' can be inserted into each slot 147' of crossbeam 113A and crossbeam 113B.

[0079] The distance in the Z direction between the coolant inlet 145_1 and the substrate 111 can be greater than the distance in the Z direction between each connector 153' and the substrate 111. The distance in the Z direction between the coolant outlet 146_1 and the substrate 111 can be greater than the distance in the Z direction between each connector 153' and the substrate 111.

[0080] Each connector 153' may include a fusible material. The melting temperature of each connector 153' may be lower than the melting temperature of each cooling line 141, 142. The melting temperature of each connector 153' may be lower than the melting temperature of the coolant inlet 145_1. The melting temperature of each connector 153' may be lower than the melting temperature of the coolant outlet 146_1. The melting temperature of each connector 153' may be lower than the melting temperature of the cooling plate 130.

[0081] According to an exemplary embodiment, each connector 153' may have a melting temperature of about 90°C or higher. According to an exemplary embodiment, each connector 153' may have a melting temperature of about 100°C or higher. According to an exemplary embodiment, each connector 153' may have a melting temperature of about 120°C or higher. According to an exemplary embodiment, each connector 153' may have a melting temperature of about 300°C or lower. According to an exemplary embodiment, each connector 153' may have a melting temperature of about 200°C or lower. According to an exemplary embodiment, each connector 153' may have a melting temperature of about 150°C or lower.

[0082] When a fire occurs in one of the battery cell assemblies 120_1, 120_2, 120_3, or 120_4, connector 153' can be melted by the heat generated by the burning battery cell assembly. Through the melting of connectors 151 and 152, pipes 131 and 132 can be separated from sidewall 114. Through the melting of connector 153', cooling plate 130 can be separated from crossbeams 113A and 113B. Cooling plate 130 can then fall into the empty space between battery cell assembly 120_1 and substrate 111.

[0083] Since the coolant inlet 145_1 is separated from the conduit 131 by the ignition of the battery cell assembly 120_1, the coolant supplied from the coolant inlet 145_1 can flow into the housing space of the battery cell assembly 120_1 within the battery pack housing 110. The coolant flowing into the housing space of the battery cell assembly 120_1 prevents the heat generated from the battery cell assembly 120_1 from spreading to adjacent battery cell assemblies. This prevents thermal runaway of the battery pack 100'.

[0084] This disclosure has been described in more detail with reference to the accompanying drawings and embodiments. However, it should be understood that the configurations described in the drawings or embodiments described in this specification are merely one embodiment of this disclosure and do not represent all the technical concepts of this disclosure. Various equivalents and modifications may exist that can replace these configurations at the time of filing this application.

Claims

1. A battery pack, the battery pack comprising: A battery pack housing, the battery pack housing including a substrate and a sidewall connected to the substrate and perpendicular to the substrate; Mounting block, the mounting block being located on the substrate; A battery cell assembly, wherein the battery cell assembly is located on the mounting block; as well as A cooling plate is located between the substrate and the battery cell assembly, wherein... The sidewall includes a coolant inlet and a coolant outlet, and The cooling plate is connected to the coolant inlet and the coolant outlet, respectively.

2. The battery pack according to claim 1, further comprising: A first conduit connects the cooling plate and the coolant inlet; as well as The second pipe connects the cooling plate and the coolant outlet.

3. The battery pack according to claim 2, wherein, Each of the first and second conduits is located between the battery cell assembly and the sidewall.

4. The battery pack according to claim 2, further comprising: A first connector connects the coolant inlet and the first pipe; as well as A second connector connects the coolant outlet and the second pipe.

5. The battery pack according to claim 4, wherein, The melting temperature of the first connector is lower than the melting temperature of the coolant inlet.

6. The battery pack according to claim 4, wherein, The melting temperature of the first connector is lower than that of the first pipe.

7. The battery pack according to claim 4, wherein, The melting temperature of the first connector is above 100°C. The melting temperature of the first connector is below 300°C. The melting temperature of the second connector is above 100°C, and The melting temperature of the second connector is below 300°C.

8. The battery pack according to claim 1, wherein, The sidewall also includes a first cooling line and a second cooling line providing a pathway for coolant movement. The coolant inlet is connected to the first cooling line, and The coolant outlet is connected to the second cooling line.

9. The battery pack according to claim 1, wherein, The battery pack housing also includes a central beam located on the substrate parallel to the sidewall, and The cooling plate is connected to the central beam via a joint.

10. The battery pack according to claim 9, wherein, The central beam includes a groove, and Each of the joints is inserted into the slot of each of the central beams.

11. The battery pack according to claim 9, wherein, The melting temperature of each of the joints is lower than the melting temperature of the coolant inlet.

12. The battery pack according to claim 1, wherein, The vertical distance between the coolant inlet and the substrate is greater than the vertical distance between the cooling plate and the substrate, and The vertical distance between the coolant outlet and the substrate is greater than the vertical distance between the cooling plate and the substrate.

13. The battery pack according to claim 1, wherein, The cooling plate is spaced apart from the substrate.

14. The battery pack according to claim 1, wherein, The battery pack housing also includes a crossbeam perpendicular to the sidewall and located on the substrate, and The cooling plate is connected to the crossbeam via a joint.

15. The battery pack according to claim 1, wherein, The cooling plate includes multiple holes, and Each of the mounting blocks passes through each of the plurality of holes to support the battery cell assembly.

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