Modular power battery mounting structure, battery pack and electric vehicle

Abstract

The utility model relates to a kind of modularization power battery mounting structure, battery pack and electric automobile, wherein, a kind of modularization power battery mounting structure, comprising: at least two and even battery box, each battery box is in upper opening structure, to install battery, the bottom of each battery box is detachably connected with water cooling plate, and heat exchange cavity is formed between corresponding water cooling plate;Water cooling assembly is provided with the water storage cavity and drainage cavity that can be communicated with each heat exchange cavity, and the water storage cavity is connected with the water inlet for connecting the outlet of heat exchanger, the drainage cavity is connected with the water outlet for connecting the inlet of heat exchanger, each battery box is evenly arranged in the two sides of water cooling assembly. The technical scheme of the utility model can relatively improve the maintainability of battery pack, reduce maintenance cost, localize fault, and reduce systematic risk.

Description

Technical Field

[0001] This utility model relates to the field of energy storage equipment technology, and in particular to a modular power battery installation structure, battery pack and electric vehicle. Background Technology

[0002] In the new energy vehicle industry, modular power battery packs have become the mainstream configuration. By assembling multiple battery modules into modular battery packs, different range versions can be configured to meet diverse market demands. Automakers can flexibly adjust the number and arrangement of battery modules according to vehicle positioning, cost, and range targets, thereby optimizing vehicle power and range performance. In grid-side and user-side energy storage projects, modular power battery packs are used in scenarios such as peak shaving and valley filling, and emergency power supplies. For example, in energy storage systems in industrial and commercial parks, the modular design facilitates installation, expansion, and maintenance, effectively storing electrical energy, reducing electricity costs, and improving power supply reliability.

[0003] In existing technologies, battery temperature is regulated through liquid cooling, air cooling, and other methods to ensure that the battery operates within a suitable temperature range. A Battery Management System (BMS) monitors and manages the modular power battery pack, including monitoring battery voltage, current, and temperature, and performing charge / discharge control and balancing management to guarantee performance and lifespan. However, while highly integrated battery packs can improve space utilization and energy density, under extreme operating conditions or prolonged high-power charge / discharge, even with thermal management measures such as liquid cooling, temperature unevenness may still occur between battery modules. This affects battery consistency and lifespan. If one module malfunctions, it may trigger a chain reaction, threatening overall safety. Furthermore, it reduces the flexibility of module replacement and repair, and has high recycling costs and low resource utilization, hindering large-scale promotion and sustainable development. Utility Model Content

[0004] This utility model provides a modular power battery installation structure, battery pack and electric vehicle, which can improve the maintainability of the battery pack, reduce maintenance costs, localize faults and reduce systemic risks.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0006] This utility model provides a modular power battery mounting structure, including:

[0007] At least two and an even number of battery boxes, each of which has an open top structure for installing batteries, and each of which has a water-cooling plate detachably connected to its bottom, and each of which forms a heat exchange chamber with the corresponding water-cooling plate.

[0008] The water-cooled assembly has a water storage chamber and a drain chamber that can connect to each of the heat exchange chambers. The water storage chamber is connected to an inlet for connecting to the heat exchanger outlet, and the drain chamber is connected to an outlet for connecting to the heat exchanger inlet. The battery boxes are evenly arranged on both sides of the water-cooled assembly.

[0009] The beneficial effects of this utility model are: the batteries are installed in multiple battery boxes, and the battery boxes and the batteries inside them form an independent battery module structure. When a battery module is damaged, only the faulty module needs to be replaced, rather than the entire battery pack, which improves maintainability and reduces maintenance costs. At the same time, it localizes the fault and reduces systemic risk. If a module thermally runs away, the physical isolation design can delay the spread of fire and buy time for people to escape.

[0010] Based on the above technical solution, the present invention can be further improved as follows.

[0011] Furthermore, the water-cooled assembly includes a water-cooled box, a limiting bracket, and a vehicle body bracket for fixing to the vehicle body. The water-cooled box is fixedly installed on the limiting bracket, and the water-cooled box has the water storage chamber and the drainage chamber. The limiting bracket is fixed to the vehicle body bracket.

[0012] Furthermore, the water-cooled box has multiple lateral drain ports that are all connected to the drainage chamber and multiple lateral water inlets that are all connected to the water storage chamber. Each heat exchange chamber is connected to the drainage chamber through each of the lateral drain ports and to the water storage chamber through each of the lateral water inlets.

[0013] Furthermore, it also includes multiple liquid cooling pipe groups, each of which is arranged in pairs and respectively in each of the battery boxes. One end of each of the liquid cooling pipe groups is connected to the corresponding heat exchange chamber. The other end of one of the liquid cooling pipe groups in the same group is connected to the drain chamber through one of the side drain ports, and the other end of the other liquid cooling pipe group in the same group is connected to the water storage chamber through one of the side water inlets.

[0014] Furthermore, each of the liquid cooling pipe assemblies includes a liquid cooling pipe and an adapter pipe. One end of each liquid cooling pipe is connected to the side drain port or the side water inlet port. The adapter pipe is installed in the corresponding battery box, and one end of the adapter pipe extends out of the corresponding battery box and is connected to the other end of the liquid cooling pipe. The other end of the adapter pipe is connected to the heat exchange chamber.

[0015] Furthermore, each of the water-cooled plates has multiple through-holes, and the other end of each through-hole is connected to the heat exchange chamber.

[0016] Furthermore, the number of the side drain outlets and the side water inlets are equal and greater than the number of the heat exchange chambers, and each of the side drain outlets and each of the side water inlets that are not connected to the liquid cooling pipe assembly can be detachably connected with a screw cap.

[0017] Furthermore, each of the screw caps is fitted with a sealing ring that abuts against one side of the water-cooled box.

[0018] This utility model also provides a battery pack, including the aforementioned modular power battery mounting structure, and further including multiple batteries, each battery being installed one-to-one in each of the battery boxes of the modular power battery mounting structure.

[0019] This utility model also provides an electric vehicle, including the aforementioned battery pack. Attached Figure Description

[0020] Figure 1 This is an isometric view of the modular power battery mounting structure of this utility model;

[0021] Figure 2 For the present utility model Figure 1 Enlarged view of section A;

[0022] Figure 3 This is a top view of the modular power battery mounting structure of this utility model;

[0023] Figure 4 This is a structural diagram of the battery box of this utility model;

[0024] Figure 5 For the present utility model Figure 4 A bottom view;

[0025] Figure 6 This is a partial cross-sectional view of the battery box of this utility model;

[0026] Figure 7 For the present utility model Figure 6 Enlarged view of section B;

[0027] Figure 8 This is a structural diagram of the water-cooling assembly of this utility model;

[0028] Figure 9 This is a cross-sectional view of the water-cooling assembly of this utility model.

[0029] The attached diagram lists the components represented by each number as follows:

[0030] 1. Battery box; 11. First port; 12. Second port;

[0031] 2. Water-cooled plate; 21. Heat exchange cavity; 22. Adapter hole;

[0032] 3. Water-cooled box; 31. Water storage chamber; 311. Water inlet; 32. Drainage chamber; 321. Water outlet; 33. Side drain outlet; 34. Side water inlet;

[0033] 4. Limiting bracket; 5. Vehicle body bracket;

[0034] 6. Liquid cooling pipe assembly; 61. Liquid cooling pipe; 62. Adapter pipe;

[0035] 7. Screw cap; 71. Sealing ring. Detailed Implementation

[0036] The principles and features of this utility model are described below. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0037] Example 1

[0038] like Figures 1-9 Embodiment 1 of this utility model provides a modular power battery mounting structure, including:

[0039] At least two and an even number of battery boxes 1, each battery box 1 having an open top structure for installing batteries, and each battery box 1 having a water-cooling plate 2 detachably connected to its bottom, and forming a heat exchange chamber 21 between each battery box 1 and the corresponding water-cooling plate 2.

[0040] The water-cooled assembly has a water storage chamber 31 and a drain chamber 32 that can connect to each heat exchange chamber 21. The water storage chamber 31 is connected to an inlet 311 for connecting to the heat exchanger outlet, and the drain chamber 32 is connected to an outlet 321 for connecting to the heat exchanger inlet. Each battery box 1 is evenly arranged on both sides of the water-cooled assembly.

[0041] The batteries are installed in multiple battery boxes 1, forming independent battery module structures with each battery box 1 and its batteries. When a battery module fails, only the faulty module needs to be replaced, rather than the entire battery pack, improving maintainability and reducing repair costs. Simultaneously, this localizes the fault, reducing systemic risk. If a module experiences thermal runaway, the physical isolation design can slow the spread of fire, buying time for personnel to escape. Furthermore, a water-cooling assembly is located in the center of each battery box 1, allowing simultaneous cooling of all battery boxes 1, thus solving the cooling expansion problem of modular power battery systems.

[0042] The battery box 1 and the batteries inside it form an independent battery module structure, which makes it easy for users to add or remove batteries according to their needs, or gradually upgrade the battery technology (such as from lithium iron phosphate to solid-state batteries).

[0043] Furthermore, in production, the modular design of each battery box allows for independent design by different OEMs, reducing development costs such as mold making and enabling rapid switching between different vehicle models on the same platform. After mass production of standard modules, they are assembled into battery packs of different specifications. Simultaneously, during recycling, the modules can be directly disassembled for reuse (e.g., as batteries for low-speed electric vehicles). Standardized production reduces costs, and the recycling process is more environmentally friendly.

[0044] In addition, as a current technology, each battery can be connected to an external battery management system to test each battery cell, so that each battery box 1 and the batteries inside it can form an independent battery module structure for replacement or expansion, which can meet the needs of subsequent upgrades to new systems. Replacement can be done without opening the entire battery pack, ensuring the sealing of the battery pack after repair, meeting the needs of maintenance convenience, and ensuring that the sealing performance of the battery pack does not deteriorate.

[0045] Based on the above embodiments, all insertion holes are opened at the bottom of each battery box 1. Adaptive insertion rods are fixed to the water-cooling plate 2 and inserted into the insertion holes to achieve pre-installation of the water-cooling plate 2. Then, during heat treatment, the water-cooling plate 2 and the battery box 1 are brazed together, thus forming a water-cooling system for a single battery module. The independent water-cooling systems formed within each battery box 1 can be connected in parallel with the water-cooling assembly and circulate, effectively reducing voltage drop and improving water-cooling efficiency.

[0046] A mesh pattern (such as...) is fixedly connected to the back of each battery box 1. Figure 5 This improves the casting formability of the battery box 1 during the die casting process, reduces porosity, increases the heat dissipation area, and enhances the heat dissipation capacity of the battery module.

[0047] Based on the above embodiments, each battery box 1 has a first port 11 and a second port 12 on its opposite side walls, which are electrically connected to the corresponding batteries. Each first port 11 corresponds to the positive terminal of the battery, and each second port 12 corresponds to the negative terminal of the battery. As one specific installation method, the battery modules formed by each battery box 1 and the batteries inside it on the same side of the water-cooling assembly are independent of each other. In this case, each battery module structure is a "parallel structure" relative to the water-cooling assembly. As another specific installation method, the battery boxes 1 on the same side of the water-cooling assembly are "connected in series". That is, the two batteries in two adjacent battery boxes 1 are "connected in series" by connecting the two opposite first ports 11 or the two opposite second ports 12 with wires. The first port 11 and the second port 12 on the side of the outermost battery box 1 are connected by the same wire, and the positive and negative terminals are connected.

[0048] Furthermore, each first port 11 and each second port 12 is equipped with a sealing plate to improve the sealing of the wire installation.

[0049] In this first embodiment, the number of battery boxes 1 can be two, four, six, or eight, etc.

[0050] like Figures 1-3 , Figure 8 as well as Figure 9 The water-cooled assembly includes a water-cooled box 3, a limiting bracket 4, and a vehicle body bracket 5 for fixing to the vehicle body. The water-cooled box 3 is fixedly installed on the limiting bracket 4, and the water-cooled box 3 has a water storage chamber 31 and a drainage chamber 32. The limiting bracket 4 is fixed to the vehicle body bracket 5.

[0051] The water-cooled box 3 is stably installed on the vehicle body through the vehicle body bracket 5, so as to ensure that the water-cooled box 3 can stably cool each battery box 1.

[0052] The water-cooled box 3 has multiple side drain ports 33 that are connected to the drainage chamber 32 and multiple side water inlets 34 that are connected to the water storage chamber 31. Each heat exchange chamber 21 is connected to the drainage chamber 32 through each side drain port 33 and to the water storage chamber 31 through each side water inlet 34.

[0053] Multiple side drain ports 33 and multiple side water inlets 34 are used to simultaneously connect each heat exchange chamber 21 with the water storage chamber 31 and the drain chamber 32. Cold water in the water storage chamber 31 is added to each heat exchange chamber 21 through each side water inlet 34 for heat exchange, and the hot water after heat exchange is discharged from the side drain ports 33 into the drain chamber 32 for further discharge.

[0054] like Figures 1-9 The modular power battery installation structure provided in Embodiment 1 of this utility model also includes multiple liquid cooling pipe groups 6. Each liquid cooling pipe group 6 is arranged in pairs and is respectively configured in each battery box 1. One end of each liquid cooling pipe group 6 is connected to the corresponding heat exchange chamber 21. The other end of one of the liquid cooling pipe groups 6 in the same group is connected to the drainage chamber 32 through one of the side drain ports 33. The other end of the other liquid cooling pipe group 6 in the same group is connected to the water storage chamber 31 through one of the side water inlets 34.

[0055] Each heat exchange chamber 21 is simultaneously connected to the water storage chamber 31 and the drain chamber 32 through each liquid cooling pipe group 6. The cold water in the water storage chamber 31 is added to each heat exchange chamber 21 through each side water inlet 34 for heat exchange, and the hot water after heat exchange is discharged into the drain chamber 32 through the side drain outlet 33 for further discharge.

[0056] Each liquid cooling pipe assembly 6 includes a liquid cooling pipe 61 and a connecting pipe 62. One end of each liquid cooling pipe 61 is connected to a side drain port 33 or a side water inlet 34. The connecting pipe 62 is installed in the corresponding battery box 1, and one end of the connecting pipe 62 extends out of the corresponding battery box 1 and is connected to the other end of the liquid cooling pipe 61. The other end of the connecting pipe 62 is connected to the heat exchange chamber 21.

[0057] Based on the above embodiment, the heat exchange chamber 21 is an integrated U-shaped water-cooled flow channel structure to form a U-shaped flow of coolant and achieve heat exchange. The other ends of the two adapter pipes 62 of the liquid-cooled pipe group 6 in the same group are connected to the inlet and outlet of the integrated U-shaped water-cooled flow channel structure through two adapter holes 22 to complete heat exchange.

[0058] Each water-cooled plate 2 has multiple through holes 22, and the other end of each through hole 62 is connected to the heat exchange chamber 21 through the corresponding through hole 22.

[0059] Based on the above embodiment, the adapter pipe 62 has an "L"-shaped structure. One end of the adapter pipe 62 extends out of the battery box 1 through a pre-drilled clearance hole on the battery box 1 wall, and a sealing ring structure is provided on the side wall of one end of the adapter pipe 62 to ensure the stable installation of the adapter pipe 62 and the sealing of the connection between the adapter pipe 62 and the battery box 1. The other end of the adapter pipe 62 is bent vertically downward to connect to the heat exchange chamber 21 through the corresponding adapter hole 22.

[0060] like Figure 8 and Figure 9 The number of side drain ports 33 and side water inlets 34 is equal and greater than the number of heat exchange chambers 21. Each side drain port 33 and each side water inlet 34 that is not connected to the liquid cooling pipe group 6 can be detachably connected with a screw cap 7.

[0061] The number of side drain ports 33 and side water inlets 34 is greater than the number of heat exchange chambers 21, so that users can adjust the installation position of the liquid cooling pipe assembly 6 as needed. Each side drain port 33 and each side water inlet 34 not connected to the liquid cooling pipe assembly 6 can be detachably connected with a screw cap 7 to seal the unused side drain ports 33 and side water inlets 34.

[0062] Each screw cap 7 is fitted with a sealing ring 71 that abuts against one side of the water-cooled box 3 to improve the sealing effect.

[0063] Example 2

[0064] This utility model provides a battery pack in embodiment two, which includes the modular power battery mounting structure as described in embodiment one, and also includes multiple batteries, each battery being installed in a corresponding battery box 1 of the modular power battery mounting structure.

[0065] Example 3

[0066] This utility model provides an electric vehicle in embodiment three, which includes the battery pack as described in embodiment two.

[0067] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0068] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0069] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0070] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0071] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0072] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A modular power battery mounting structure, characterized in that, include: At least two and an even number of battery boxes (1), each of the battery boxes (1) having an open top structure for installing batteries, and each of the battery boxes (1) having a water-cooling plate (2) detachably connected to its bottom, and forming a heat exchange chamber (21) between each of the battery boxes (1) and the corresponding water-cooling plate (2). The water-cooled assembly has a water storage chamber (31) and a drain chamber (32) that can connect to each of the heat exchange chambers (21). The water storage chamber (31) is connected to an inlet (311) for connecting to the heat exchanger outlet, and the drain chamber (32) is connected to an outlet (321) for connecting to the heat exchanger inlet. Each of the battery boxes (1) is evenly arranged on both sides of the water-cooled assembly.

2. The modular power battery mounting structure according to claim 1, characterized in that, The water-cooled assembly includes a water-cooled box (3), a limiting bracket (4), and a vehicle body bracket (5) for fixing to the vehicle body. The water-cooled box (3) is fixedly installed on the limiting bracket (4), and the water-cooled box (3) has the water storage chamber (31) and the drainage chamber (32). The limiting bracket (4) is fixed to the vehicle body bracket (5).

3. The modular power battery mounting structure according to claim 2, characterized in that, The water-cooled box (3) has multiple side drain ports (33) that are connected to the drain chamber (32) and multiple side water inlets (34) that are connected to the water storage chamber (31). Each heat exchange chamber (21) is connected to the drain chamber (32) through each side drain port (33) and to the water storage chamber (31) through each side water inlet (34).

4. The modular power battery mounting structure according to claim 3, characterized in that, It also includes multiple liquid cooling pipe groups (6), each of the liquid cooling pipe groups (6) is arranged in pairs and respectively in each of the battery boxes (1). One end of each of the liquid cooling pipe groups (6) is connected to the corresponding heat exchange chamber (21). The other end of one of the liquid cooling pipe groups (6) in the same group is connected to the drain chamber (32) through one of the side drain ports (33). The other end of the other liquid cooling pipe group (6) in the same group is connected to the water storage chamber (31) through one of the side water inlets (34).

5. The modular power battery mounting structure according to claim 4, characterized in that, Each of the liquid cooling pipe groups (6) includes a liquid cooling pipe (61) and a connecting pipe (62). One end of each liquid cooling pipe (61) is connected to the side drain port (33) or the side water inlet (34). The connecting pipe (62) is installed on the corresponding battery box (1), and one end of the connecting pipe (62) extends out of the corresponding battery box (1) and is connected to the other end of the liquid cooling pipe (61). The other end of the connecting pipe (62) is connected to the heat exchange chamber (21).

6. The modular power battery mounting structure according to claim 5, characterized in that, Each of the water-cooled plates (2) has multiple through holes (22), and the other end of each of the connecting pipes (62) is connected to the heat exchange chamber (21) through the corresponding through hole (22).

7. The modular power battery mounting structure according to claim 4, characterized in that, The number of the side drain outlets (33) and the side water inlets (34) are equal and greater than the number of the heat exchange chambers (21). Each of the side drain outlets (33) and the side water inlets (34) that are not connected to the liquid cooling pipe group (6) can be detachably connected with a screw cap (7).

8. The modular power battery mounting structure according to claim 7, characterized in that, Each of the screw caps (7) is fitted with a sealing ring (71) that abuts against one side of the water-cooled box (3).

9. A battery pack, characterized in that, The modular power battery mounting structure as described in any one of claims 1-7 also includes a plurality of batteries, each battery being installed in a corresponding battery box (1) of the modular power battery mounting structure.

10. An electric vehicle, characterized in that, Includes the battery pack as described in claim 9.

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