Battery assembly

Abstract

The invention relates to the technical field of batteries, in particular to a battery assembly. The lithium ion battery comprises a battery body and a protective body wrapping the battery body in a sealed mode, an arrangement area is formed in the protective body, and the arrangement area is fixedly attached to the battery body; a temperature control area is formed in the protection body, and the temperature control area and the arrangement area are matched with each other to regulate and control the temperature of the battery body; an inlet and an outlet which are communicated with the temperature control area are formed in the protection body; a communication channel for forming circuit communication between the battery body and the outside of the protective body is further formed in the protective body in a penetrating manner, and the communication channel is not communicated with the temperature control area. The battery assembly has the advantages of being capable of being rapidly assembled and good in temperature control performance.

Description

Technical Field

[0001] This invention relates to the field of battery technology, specifically to battery modules. Background Technology

[0002] With the rapid development of new energy vehicles and energy storage technologies, power batteries face higher requirements in terms of safety, thermal management efficiency, and structural stability.

[0003] In existing technologies, the power battery and thermal management system are separate modules. This approach generally suffers from uneven heat dissipation and low cooling efficiency due to the concentrated heat generated by the battery. Furthermore, the thermal management system module has complex connections, requiring the power battery to be centrally located to ensure the smooth connection and installation of the complex thermal management module. This makes battery layout design the biggest obstacle and greatly limits the innovative design of the entire vehicle product. Summary of the Invention

[0004] This invention provides a battery assembly to address the problems of insufficient cooling efficiency, uneven temperature distribution, weak resistance to expansion and deformation of the housing structure, and lack of coordinated cooling among multiple battery modules in existing power batteries under high-power charge and discharge conditions. To achieve the above objectives, this invention utilizes the following technical solution: A battery assembly includes a battery body and a protective body that is sealed and covered within the battery body. An arrangement area is formed inside the protective body, and the arrangement area is fixedly attached to the battery body. A temperature control zone is set inside the protective body, and the temperature control zone and the arrangement zone work together to regulate the temperature of the battery body. The protective body is provided with an inlet and an outlet that are connected to the temperature control zone; The protective body is also provided with a connecting channel for the battery body to form a circuit connection with the outside of the protective body, and the connecting channel is not connected to the temperature control zone; Multiple battery modules are connected through the inlet and the outlet to form a novel battery thermal management system.

[0005] Furthermore, the protective body comprises an inner sleeve, an outer shell, and a protective plate. The inner sleeve is a cylindrical structure that covers the battery body, and its shape is adapted to the battery body to achieve a close fit and fixation. The outer shell is a cylindrical structure that covers the outside of the inner sleeve, and both the inner sleeve and the outer shell have an external opening; The protective plate sealing cover is located at the outer opening of the inner sleeve and the outer shell, and the protective plate is also fitted to the battery body; The inner sleeve and the protective plate form an arrangement area, and the outer side of the inner sleeve, the inner side of the outer shell, and the protective plate form a temperature control area. The inlet and outlet are both located on the outer shell.

[0006] The dual-layer cooling structure formed by the temperature control zone and the arrangement zone is bonded to the battery body. The elastic thermally conductive adhesive between the battery body and the inner sleeve allows multiple bonding surfaces (five sides) of the battery to be in contact with the thermally conductive adhesive of the inner sleeve. Through effective heat conduction in the temperature control zone, the power battery is directly cooled. The water resistance and pressure of the cooling channel can be effectively detected by the inlet and outlet of the temperature control zone. The external pressure of the battery body in the arrangement zone can be indirectly controlled by the adjustable water pressure. The temperature can be controlled in real time according to the pressure change of the cooling channel to adapt to the physical requirements of the battery body during the charging and discharging breathing effect.

[0007] The present invention proposes a novel battery thermal management system that integrates multiple battery modules with a network of water channels to form a functional and synergistic cooling structure. This system enables interconnection of cooling water channels for multiple battery modules, simplifies the connection of cooling mechanisms, reduces the cost of water-cooled structures, and makes it possible to design distributed battery modules according to requirements.

[0008] Furthermore, the inner sleeve sidewall protrudes outward to form several protruding ridges, which extend from the outer surface of the inner sleeve to the inner surface of the outer shell until they fit against the inner surface of the outer shell.

[0009] Furthermore, the inner sleeve includes a first shell in the width direction and a second shell in the length direction. The protruding ridge on the first shell forms a first temperature control groove, and the protruding ridge on the second shell forms a second temperature control groove. The first temperature control groove and the second temperature control groove correspond to each other to form a temperature control channel. The starting point of the temperature control channel corresponds to the inlet, and the ending point of the temperature control channel corresponds to the outlet.

[0010] Furthermore, the inlet and outlet are configured to correspond, that is, the inlet and outlet on adjacent protective bodies are connected to ensure that adjacent temperature control channels are connected.

[0011] By designing several protruding ridges in the inner sleeve and multiple temperature control channels formed between the ridges, the multiple cooling channels within the temperature control zone formed by the outer and inner sleeves reduce water resistance, lower water pump power, reduce noise, and achieve optimal NVH performance. Furthermore, the sealing between the outer and inner sleeves is simplified. By using adhesive bonding between the outer and inner sleeves, the cooling channels are rationally designed from the inlet flow path through multiple temperature control slots to the outlet, increasing the cooling area, significantly reducing water resistance, and greatly improving the cooling effect. This effectively prevents thermal runaway of the power battery, extends the service life of the power battery, and solves the complexity of water channel connections in existing technologies.

[0012] Furthermore, a buffer contact portion is formed between adjacent protruding ridges on the inner side of the inner sleeve, and the buffer contact portion and the side of the protruding ridge form a compression stress relief zone.

[0013] Furthermore, the inner sleeve and the outer sleeve are provided with rounded corners at the bends.

[0014] Furthermore, the inner sleeve deforms under the action of external forces to adapt to the deformation of the battery body.

[0015] In terms of structure, this invention uses an outer shell as a strength support for the battery assembly, while the inner sleeve can adapt to the corresponding deformation of the battery body during charging and discharging to form a pressure buffer, meeting the physical requirements of the power battery's breathing effect and solving the problem of stress and structural damage caused by the expansion and contraction of the power battery. The inner sleeve can adapt to the deformation of the power battery body, i.e., the deformation caused by the breathing effect. The inner sleeve not only serves as a separation from the temperature control zone to achieve the sealing requirements, but also realizes the dual protection of temperature control and improved power battery performance.

[0016] Furthermore, adjacent outer shells are fitted and fixed together.

[0017] Multiple battery modules can be connected through the outlet and inlet of the temperature control zone. Thermally conductive adhesive is used between the battery modules for fixation and bonding. This allows for the distributed arrangement of batteries on demand according to the needs of vehicle manufacturing. Multiple battery modules can be connected in series or parallel using the idle space of the vehicle, overcoming the problem of centralized placement of batteries in existing vehicles.

[0018] The guard plate is also equipped with a pressure relief valve.

[0019] The pressure relief channel formed by the protective plate and the arrangement area proposed in this invention can effectively solve the explosion caused by the compression of the power battery due to charging and discharging in the event of thermal runaway by connecting the pressure relief valve and the pressure relief channel, thus preventing the accident from escalating.

[0020] In summary, the present invention has at least one of the following beneficial technical effects: 1. The battery assembly of this invention changes the traditional separate design of battery and cooling system, and integrates the cooling structure with the battery structure, so that the battery temperature regulation is efficient and multi-faceted, the cooling area is increased, the heat dissipation effect is greatly improved, the structure is simple, the cost is reduced, the battery efficiency is high, and the convenience and economy are improved.

[0021] 2. This invention creatively designs the battery component packaging structure as an outer hard and inner soft structure, solving the impact of battery breathing effect (expansion and contraction during charging and discharging) on ​​lifespan. Furthermore, the cooling structure formed by the unique design of the inner and outer shells can independently and dynamically measure and control the internal pressure changes of the battery by detecting the pressure of the temperature control medium (such as cooling water), thus solving the long-standing problems of interface separation and aging in solid-state and semi-solid-state batteries.

[0022] 3. The innovative water channel connection of multiple battery components in this invention forms a new type of battery thermal management system with lower water resistance and a simpler and easier-to-use connection method, making distributed battery layout design a reality and making battery safety protection easier. Multiple battery components can be flexibly arranged in different positions in the innovative design of the whole vehicle, making battery installation more flexible and improving the space utilization of the whole vehicle.

[0023] 4. By integrating the cooling structure with the battery structure into a single heat exchange structure, the design limitations of the battery in terms of length and width are greatly expanded, making it easier to design and develop batteries according to various functional requirements. Attached Figure Description

[0024] Figure 1 This is an overall schematic diagram of the present invention.

[0025] Figure 2 This is an exploded view of the present invention.

[0026] Figure 3 This is a cross-sectional view of the protective body in this invention.

[0027] Figure 4 This is an illustration of the inner sleeve. Figure 1 .

[0028] Figure 5 This is a schematic diagram of the inner casing. Figure 2 .

[0029] Figure 6 This is a schematic diagram of the explosion of the protective structure.

[0030] Reference numerals: 1. Battery body; 2. Protective body; 3. Arrangement area; 4. Temperature control area; 221. Inlet; 222. Outlet; 7. Connecting channel; 21. Inner sleeve; 22. Outer shell; 23. Protective plate; 211. Protruding ridge; 212. First shell; 213. Second shell; 214. First temperature control channel; 215. Second temperature control channel; 2111. Buffer contact part. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Reference Figures 1 to 6This invention discloses a battery assembly, specifically a power battery assembly. In an embodiment of this invention, the battery assembly includes a battery body 1, which is a power battery cell; and a protective body 2 that is sealed and covered within the battery body 1. The protective body 2 serves to seal and protect the battery body 1, and an arrangement area 3 is formed inside the protective body 2, which is fixedly attached to the battery body 1.

[0033] In the actual installation process, the battery body 1 is installed in the arrangement area 3 of the protective body 2 for sealed installation. Furthermore, in this invention, the battery body 1 (cell) is installed in the protective body 2 using elastic thermally conductive adhesive, and the battery bodies 1 (cells) are bonded and fixed together using elastic thermally conductive adhesive. Multiple battery bodies 1 (cells) can be installed side-by-side in the arrangement area 3, forming a battery assembly. The number of battery bodies can be designed according to actual needs. During the actual installation of the power battery, multiple battery assemblies are arranged and installed in a preset order, with adjacent battery assemblies tightly fitted to complete the assembly of the novel battery thermal management system. Furthermore, to ensure the normal charging and discharging operation of the battery body 1, a connecting channel 7 is provided through the protective body 2 to allow the battery body 1 to form a circuit connection with the outside of the protective body 2. The connecting channel 7 is not conductive to the temperature control area 4.

[0034] In this invention, another core function of the protective body 2 is to control the temperature of the battery body 1, mainly by cooling it. Based on this, a temperature control zone 4 is opened inside the protective body 2. The temperature control zone 4 and the arrangement zone 3 cooperate with each other to regulate the temperature of the battery body 1. Specifically, the temperature control zone 4 in this embodiment of the invention is hollow and is composed of a double-layer structure of the protective body 2 (detailed below). By injecting a temperature control medium such as coolant into the temperature control zone 4, the temperature of the protective body 1 and the battery body 1 located in the arrangement zone 3 inside the protective body 1 is controlled.

[0035] More specifically, to ensure that the cooling medium can enter the temperature control zone, the protective body 2 is provided with an inlet 221 and an outlet 222 that are interconnected with the temperature control zone 4. There is no limitation to only one inlet 221 and one outlet 222 in the temperature control zone 4. Multiple outlets can be configured according to actual debugging, installation and other needs to meet actual requirements. In this embodiment, the inlet 221 and outlet 222 are used in conjunction with the introduction and export of the external temperature control medium to adjust the temperature of the temperature control zone 4 when the temperature control zone 4 is filled with a flowable temperature control medium. In this invention, the temperature control zone 4 and the arrangement area 3 are separated by the protective body 2, which is made of a thermally conductive material (described in detail later). Thus, the temperature of the protective body 2 and the battery body 1 installed inside the protective body 2 are controlled by the temperature control medium in the temperature control zone 4.

[0036] Regarding the protective body 2, in this invention, the protective body 2 is composed of an inner sleeve 21, an outer shell 22, and a protective plate 23. In this embodiment, the protective body 2 has a rectangular structure. In actual application, the shape of the protective body 2 is adaptively adjusted according to the shape of the battery body 1. The inner sleeve 21 is a cylindrical structure that covers the battery body 1, and its shape is adapted to the battery body 1 to achieve a close fit and fixation.

[0037] The outer shell 22 is a structure that covers the outer side of the inner sleeve 21. The outer shell 22 and the inner sleeve form a double-layer structure. Both the inner sleeve 21 and the outer shell 22 have an outer opening to facilitate the installation of the battery cell during the actual installation process. The protective plate 23 is sealed at the outer opening of the inner sleeve 21 and the outer shell 22, and the protective plate 23 is also fitted to the battery body 1. A pressure relief valve is also provided on the protective plate 23.

[0038] It should be noted that the inner sleeve 21 and the outer sleeve 22 can be made of metal materials such as aluminum alloy, which have the characteristics of high strength and good thermal conductivity, thus playing a role in temperature control and protection. On the other hand, the inner sleeve 21 can also be made of a softer material (detailed below). During the actual charging and discharging process of the battery cell, it will undergo a "breathing effect", that is, a slight expansion and contraction process will occur during the charging and discharging process. The inner sleeve made of soft material can compensate for the breathing effect of the battery cell during charging and discharging and deform synchronously, thereby ensuring that the breathing effect of the battery cell will not affect the battery cell itself.

[0039] In actual operation and installation, the battery body 1 is first placed in the inner sleeve 21 and fixed by welding or bonding. After fixing, the protective plate 23 is placed on the inner sleeve 21 and fixed by welding or bonding. An arrangement area 3 is formed between the inner sleeve 21 and the protective plate 23.

[0040] Next, the outer casing 22 is attached to the inner casing 21 and fixed to the protective plate 23 by welding or bonding, thus completing the installation of the battery assembly. In this embodiment, the connecting channel 7 is located on the protective plate 23 to ensure communication between the battery and the outside world after the battery assembly installation is completed.

[0041] Based on the above installation and arrangement, more specifically, a temperature control zone 4 is formed between the outer side of the inner sleeve 21, the inner side of the outer shell 22, and the protective plate 23. Both the inlet 221 and the outlet 222 are located on the outer shell 22. During temperature control, the temperature control medium enters and exits through the inlet 221 and the outlet 222, ensuring that the temperature control zone 4 is filled with flowing temperature control medium. This allows the heat generated by the battery body 1 to be carried away. Alternatively, when heating is required, the battery body 1 can be heated by adding a temperature control medium at a temperature higher than that of the battery body 1 to meet its operating temperature requirements.

[0042] In this invention, the outer shell 22 and the inner sleeve 21 form a double-layer structure. The protective body 2 has an inlet 221 and an outlet 222 that are connected to the temperature control zone 4. The outer shell 22 is fitted onto the inner sleeve 21 and fixed to the protective plate 23 by welding or bonding to form a cooling structure of an enclosed arrangement area 3. The battery body 1 is placed in the arrangement, and the battery body 1 is attached and fixed to the inner sleeve 21. Alternatively, elastic thermally conductive adhesive can be placed between the battery body 1 and the inner sleeve 21 for close contact, so as to achieve multi-sided cooling of the battery body 1. The cooling area is greatly increased from the two-sided or three-sided cooling of the prior art to five-sided cooling, which effectively solves the thermal management efficiency of the battery and extends the battery life.

[0043] In addition, regarding the material of the inner sleeve, in order to ensure that the inner sleeve 21 can deform under the action of external force to adapt to the battery breathing effect and deform itself, the inner sleeve 21 in this invention can be made of a soft material or a material with certain ductility, such as a thin aluminum alloy or other pure soft material, which has certain thermal conductivity, so that it can better fit the battery body while also having better heat dissipation and protection performance, so that when the actual battery body 1 (cell) deforms during charging and discharging, the inner sleeve 21 can adapt to the deformation and select the material accordingly.

[0044] Furthermore, since there is a temperature control zone filled with coolant, the outer shell 22, as a protective body, has a certain structural strength support component. The coolant is filled through the inlet of the temperature control zone 4 into the water cooling mechanism composed of the outer shell 22 and the inner sleeve 21 to the outlet 222. On the one hand, this minimizes the probability of the battery body (cell) being damaged by external influences.

[0045] On the other hand, the pressure of the temperature-controlling medium can also serve as a good parameter reflecting the battery's state, allowing for proactive prevention. For example, changes in the pressure of the temperature-controlling medium can reflect whether the dynamic pressure inside the battery cell has changed. Specifically, when the battery body 1 expands or contracts upwards during charging and discharging, the pressure of its temperature-controlling medium will change accordingly. The pressure can be adjusted based on the pressure parameter to indirectly control the external constraint force of the battery body 1, better meeting the physical requirements of its breathing process. This ensures better flexible contact between the battery body 1 and the inner sleeve 21, especially in solid-state and semi-solid-state batteries, effectively reducing internal resistance, preventing active material shedding, and extending lifespan.

[0046] Finally, regarding the aforementioned dual-layer structure, a balance between flexibility and rigidity is achieved. The outer layer ensures the rigidity of the outer structure and facilitates sealing, while the softness and elasticity of the inner layer provide effective and appropriate constraint for the battery cell, allowing for the selection of the optimal point of dynamic equilibrium during the battery assembly process.

[0047] Furthermore, to ensure better flowability of the temperature control medium in the temperature control zone 4 and to ensure better structural strength of the protective body 2, in this embodiment, the inner sleeve 21 has several protruding ridges 211 protruding outward from its sidewall. The protruding ridges 211 extend beyond the outer surface of the inner sleeve 21 towards the inner surface of the outer shell 22 until they are in contact with the inner surface of the outer shell 22. Alternatively, the outer shell 22 may be recessed inward to form protruding ridges 211, which abut against the outer surface of the inner sleeve 21.

[0048] The protruding ridge 211 ensures that the outer shell 22 and the inner sleeve 21 can be supported by the protruding ridge 211. In addition, the protruding ridge 211 ensures that the flow of the temperature control medium is more stable, as described below.

[0049] For better explanation and understanding, in this embodiment, the inner sleeve 21 is divided into a first shell 212 in the width direction and a second shell 213 in the length direction. The protruding ridge 211 on the first shell 212 forms a first temperature control channel 214, and the protruding ridge 211 on the second shell 213 forms a second temperature control channel 215. The first temperature control channel 214 and the second temperature control channel 215 correspond to each other to form a temperature control channel. In the accompanying drawings of this invention, the first temperature control channel 214 and the second temperature control channel 215 are not connected end to end in the actual drawing. In actual use, they can be set as a connection structure to ensure the continuity of the first temperature control channel 214 and the second temperature control channel 215, thereby ensuring the continuity of the temperature control channel.

[0050] The protruding ridges 211 also provide a better buffering effect. Specifically, since the protruding ridges 211 extend outward from the inner side of the inner sleeve, a buffer contact portion 2111 is formed between adjacent protruding ridges 211. The buffer contact portion 2111 and the side of the protruding ridge 211 form a stress relief zone. In this embodiment of the invention, the purpose of the above-mentioned design is to buffer the impact caused by the battery's own minor expansion and contraction and external interference (such as impacts), ensuring the applicability of the actual battery.

[0051] The starting point of the temperature control channel corresponds to the inlet 221, and the ending point corresponds to the outlet 222, thus forming a multi-channel cooling water system. In actual temperature control, the temperature control medium flows in through the inlet 221, first passing through the first temperature control channel 214. Due to the restriction of the protruding ridge 211, the temperature control medium in the first temperature control channel 214 can only flow along the first temperature control channel 214. Since the first temperature control channel 214 corresponds to the second temperature control channel 215, the temperature control medium in the first temperature control channel 214 flows into the second temperature control channel 215, then flows into the first temperature control channel 214 in another width direction, and flows out from the outlet 222. This achieves stability in the flow direction of the temperature control medium and prevents turbulence.

[0052] In this invention, a double-layer cooling structure is formed by the temperature control zone 4 and the arrangement zone 3. Multiple cooling channels, consisting of the first temperature control groove 214 and the second temperature control groove 215, are formed between the multiple protruding ridges 211 of the inner sleeve 21. The multiple cooling channels have extremely low water resistance and low water pressure, reducing the sealing difficulty between the inner sleeve 21 and the outer shell 22. Furthermore, the multiple cooling channels can be flexibly designed and arranged according to the optimal temperature difference of the battery cells. At the same time, the flow direction of the cooling channels can be freely designed according to the low water resistance and low water pressure. They can also be arranged according to the minimum temperature difference of the battery cells. This improves performance and reduces the power of the water pump, resulting in lower noise, excellent NVH performance, and avoids uneven heat dissipation of the battery components, thus improving cooling efficiency.

[0053] It should be noted again that the protruding ridges 211 on the first housing 212 and the second housing 213 can be configured as a continuous structure or as a discontinuous structure as shown in the figure of the present invention. In practice, they do not affect the guiding flow of the specific temperature control medium.

[0054] In addition, the protruding ridge 211 structure, which is hard on the outside and soft on the inside, can actively guide the deformation mode and force of the cell, solve the stress problem of battery expansion and contraction, and can efficiently and simply assemble batteries according to demand.

[0055] To further ensure smooth flow of the cooling medium, in this embodiment, the bend between the inner sleeve 21 and the outer sleeve 22 is provided with a rounded corner. This ensures that the resistance of the temperature-controlled medium is reduced when flowing towards the bend, further improving the flowability of the temperature-controlled medium.

[0056] In summary, this means achieving and completing stable, continuous, and efficient temperature control operations.

[0057] In addition, in this embodiment, in order to ensure that multiple battery components can be quickly and stably fixedly installed, adjacent shells 22 are fitted and fixed together, and the inlet 221 and outlet 222 are correspondingly set, that is, the inlet 221 and outlet 222 on adjacent protective bodies 2 are connected to ensure that adjacent temperature control channels are connected.

[0058] In application, since power batteries are generally installed in multiple groups, in this case, adjacent inlets 221 and outlets 222 are connected. That is, when multiple battery groups are arranged and installed, it is only necessary to connect the external temperature control medium at the inlet 221 of the first group and the external temperature control medium at the outlet 222 of the last group. The battery components are connected through the inlet and outlet of the temperature control zone. Thermal conductive adhesive is used to fix and connect each battery component, forming a network cooling water channel, thereby realizing a new type of battery thermal management system. It has low water resistance, is easy to install and more convenient to operate. It solves the problems of the separate design of cooling mechanism and battery structure, complex heat dissipation connection, and centralized placement of battery body in the prior art.

[0059] This invention treats the battery assembly as a single battery unit, allowing multiple battery assemblies to be arranged in parallel and installed in different locations according to the needs of the vehicle. They can be arranged in a wider or narrower shape, or in both wide and narrow configurations in different locations within the vehicle. Because the battery itself has built-in cooling, no additional cooling structure is needed to cool the battery body, thus allowing for flexible arrangement. This also greatly expands the design limitations of the battery in terms of length and width, making it easier to freely combine the battery according to various functional requirements to meet the innovative design of the entire vehicle.

[0060] Furthermore, in this invention, the inlet 221 and outlet 222 of the outer casing 22 are designed with a slightly convex structure, and then fitted with a flat, integrated compression connection. This ensures a perfect and durable sealing effect. It also makes the docking process of adjacent outer casings 22 more convenient and faster.

[0061] The present invention provides a cooling mechanism for a battery assembly formed by a protective shell 22 and an inner sleeve 21, which surrounds the battery body 1 to achieve efficient multi-faceted cooling of the battery body 1. This achieves an integrated design structure where the cooling structure and the battery body are combined into one, significantly increasing the heat dissipation area, reducing water resistance, eliminating the need for complex heat dissipation structure design, and simplifying the connection of the cooling structure. This solves the problems of complex connection and uneven heat dissipation in existing thermal management systems where the cooling structure and battery structure are designed separately. Simultaneously, the protruding ridges 211 and the elasticity of the inner sleeve 21 meet the physical requirements of the breathing effect during charging and discharging of the battery body 1. This synergistically improves the heat dissipation effect and efficiency of the battery assembly by combining the cooling effect with the breathing effect of the battery body 1. Furthermore, the battery assembly becomes an independent module, allowing for flexible connection to meet the innovative design requirements of the entire vehicle.

[0062] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects.

[0063] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A battery assembly comprising a battery body (1), a protective body (2) sealingly covering the battery body (1), characterized in that: The protective body (2) forms an arrangement area (3) inside, and the arrangement area (3) is fixedly attached to the battery body (1); The protective body (2) has a temperature control zone (4) inside, and the temperature control zone (4) and the arrangement zone (3) work together to regulate the temperature of the battery body (1); The protective body (2) has an inlet (221) and an outlet (222) that are connected to the temperature control zone (4). The protective body (2) is also provided with a connecting channel (7) for the battery body (1) to form a circuit connection with the outside of the protective body (2). The connecting channel (7) is not connected to the temperature control zone (4).

2. The battery assembly of claim 1, wherein: The protective body (2) consists of an inner sleeve (21), an outer shell (22), and a protective plate (23). The inner sleeve (21) is a cylindrical structure that covers the battery body (1), and its shape is adapted to the battery body (1) to achieve a close fit and fixation. The outer shell (22) is a cylindrical structure that covers the outer side of the inner sleeve (21), and both the inner sleeve (21) and the outer shell (22) have an outer opening; The protective plate (23) is sealed at the outer opening of the inner sleeve (21) and the outer shell (22), and the protective plate (23) is also fitted to the battery body (1); Among them, the inner sleeve (21) and the protective plate (23) form an arrangement area (3), the outer side of the inner sleeve (21), the inner side of the outer shell (22) and the protective plate (23) form a temperature control area (4), and the inlet (221) and outlet (222) are both opened on the outer shell (22).

3. The battery assembly of claim 2, wherein: The inner sleeve (21) has a side wall that protrudes outward to form a number of protruding ridges (211). The protruding ridges (211) protrude outward from the outer surface of the inner sleeve (21) and extend to the inner surface of the outer shell (22) until they fit against the inner surface of the outer shell (22).

4. The battery assembly of claim 3, wherein: The inner sleeve (21) includes a first shell (212) in the width direction and a second shell (213) in the length direction. The protruding edge (211) on the first shell (212) forms a first temperature control groove (214), and the protruding edge (211) on the second shell (213) forms a second temperature control groove (215). The first temperature control groove (214) and the second temperature control groove (215) correspond to each other to form a temperature control channel. The starting point of the temperature control channel corresponds to the inlet (221), and the ending point of the temperature control channel corresponds to the outlet (222).

5. The battery assembly of claim 4, wherein: The inlet (221) and outlet (222) are set in correspondence, that is, the inlet (221) and outlet (222) on the adjacent protective body (2) are connected to ensure that the adjacent temperature control channels are connected.

6. The battery assembly of claim 3, wherein: On the inner side of the inner sleeve (21), a buffer contact portion (2111) is formed between adjacent protruding ridges (211), and the buffer contact portion (2111) and the side of the protruding ridge (211) form a pressure stress relief zone.

7. The battery assembly of claim 2, wherein: The inner sleeve (21) and the outer sleeve (22) are bent with rounded corners.

8. The battery assembly of claim 2, wherein: The inner sleeve deforms under the action of external forces to adapt to the deformation of the battery body.

9. The battery assembly of claim 2, wherein: The adjacent outer shells (22) are fitted and fixed together.

10. The battery assembly of claim 2, wherein: The guard plate (23) is also equipped with a pressure relief valve.

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