A glue blocking box, a battery component, and a battery pack

Abstract

The utility model belongs to the battery field, concretely is a kind of glue blocking box, battery component and battery package.Solve the problem that the heat of single battery pole position in existing battery module is too high to cause thermal runaway possibly.The glue blocking box includes box body, and box body is equipped with open end;First opening is set on the first side wall of box body, and second opening is respectively set on the two second side walls of box body;In battery component, heat transfer component is fixed on the polarity terminal of each single battery, and heat exchange is carried out to battery module based on heat transfer component.Meanwhile, glue blocking box is fixed on battery component, and the inlet and outlet pipe section of heat transfer component is inserted into box body through first opening and connected with connecting pipe section inserted into box body through second opening.Then, second insulating sealant layer is filled in box body, to prevent condensation from generating at heat transfer component connecting part extended out of battery module and connecting pipe section connected therewith, and to improve the safety performance of battery package.

Description

Technical Field

[0001] This utility model belongs to the field of batteries, specifically a rubber baffle box, a battery component, and a battery pack. Background Technology

[0002] Currently, common battery modules (also known as battery packs) are composed of multiple individual cells (which are generally cylindrical or square) connected together in series, parallel, or a combination of series and parallel connections.

[0003] Temperature control of battery modules has always been a hot topic in this field. Most existing battery modules use air cooling or liquid cooling to control the temperature of the entire battery module. However, since the terminals of individual cells in the battery module are the parts with the most concentrated heat, if the local heat of the terminals is too high, it is very likely to cause thermal runaway of the individual cells in the battery module. Summary of the Invention

[0004] To address the potential thermal runaway issue caused by excessive heat at the terminal positions of individual cells in existing battery modules, this invention provides a baffle box, a battery component, and a battery pack. In the battery component, heat transfer components are fixed to the polarity terminals of each individual cell, enabling heat exchange between the battery module and the module. Simultaneously, the baffle box fixed to the battery component prevents condensation at the connection points of the heat transfer components extending from the battery module and the connecting pipes thereto, thus improving the safety performance of the battery pack.

[0005] The first aspect of this utility model provides a sealing box, including a box body with an open end serving as an operating port; a first opening penetrating the first side wall of the box body for a liquid inlet / outlet pipe section of a heat transfer component (the liquid inlet / outlet pipe section of the heat transfer component is the connection part of the heat transfer component extending from the battery module) to pass through the box body; second openings penetrating the second side walls of the box body are respectively provided on two second side walls; the second openings are for a connecting pipe section to pass through the box body and connect with the liquid inlet / outlet pipe section of the heat transfer component; wherein the first side wall and the two second side walls are adjacent; the inner cavity of the box body is used to fill a second insulating sealant layer to cover the pipe body located in the inner cavity of the box body.

[0006] After the aforementioned baffle box is fixed to the end of the battery component, the inlet and outlet liquid pipes of the heat transfer component of the battery component pass through the first opening into the box body and connect with the connecting pipe section that passes through the second opening into the box body. Then, a second insulating sealant layer is filled into the box body, covering the pipe body located within the box body's inner cavity, thereby forming a relatively sealed and insulated space. When condensation occurs due to changes in ambient humidity, the second insulating sealant layer inside the baffle box effectively prevents condensation droplets from directly contacting the pipe body within the box body, preventing short circuits in live parts caused by condensation. Simultaneously, this second insulating sealant layer isolates moisture from the pipe body within the box body, preventing accelerated corrosion due to prolonged contact with moisture. This greatly ensures the safety and stability of the heat transfer component, thereby maintaining the normal operation of the entire battery pack temperature control system and reducing the risk of dangerous conditions such as thermal runaway.

[0007] Furthermore, both the first opening and the second opening mentioned above are through holes.

[0008] From a sealing perspective, compared to other opening shapes, such as slots, through holes have a relatively regular circumferential outline. When using sealing materials such as sealants and gaskets, the sealing material can adhere more tightly and evenly to the edges of the through hole, thus forming a more secure seal. This tight-fitting sealing method can greatly reduce the problem of sealant leakage caused by poor sealing.

[0009] From a structural strength perspective, through holes have a relatively smaller impact on the structural strength of the housing. Compared to large-area slots and other openings, through holes occupy a relatively small proportion of the housing's sidewall area, resulting in less damage to the overall structural integrity. This allows the protective box to maintain good structural strength even when subjected to external forces such as vibration and impact generated during battery module operation, making it less prone to deformation, cracking, or other damage. This ensures the protective box can stably perform its protective function over a long period, providing reliable protection for the normal operation of the battery pack's temperature control system.

[0010] Furthermore, the aforementioned rubber baffle also includes a positioning ring, which is disposed on the inner wall of the second side wall and coaxial with the second opening, for radial positioning of the connecting pipe section that passes through the second opening.

[0011] Furthermore, the third sidewall of the aforementioned housing is fixed to the second sidewall via a detachable connection structure; wherein the third sidewall of the housing is adjacent to the second sidewall. By disassembling the third sidewall, it is convenient to connect the inlet and outlet liquid pipe sections of the heat transfer component to the connecting pipe sections.

[0012] Furthermore, the aforementioned detachable connection structure includes a slot formed on the second side wall, with the edge of the third side wall embedded in the slot.

[0013] During installation, simply align the edge of the third sidewall with the slot and gently insert it. No complicated tools or tedious procedures are required throughout the process, which greatly shortens the installation time and improves assembly efficiency. In large-scale battery pack production, it can effectively speed up the production process and reduce labor costs.

[0014] Furthermore, the slot fits tightly with the edge of the third side wall, and the inner wall of the slot constrains the third side wall in multiple directions, which can effectively resist external forces such as vibration and displacement during the operation of the battery module, prevent loosening and falling off, ensure the integrity of the baffle box structure, stably protect the internal pipe section, and ensure the normal operation of the battery pack temperature control system.

[0015] The second aspect of this utility model provides a battery component, including a battery module, a heat transfer component, and the aforementioned baffle box;

[0016] The aforementioned battery module includes a casing and n individual battery cells, where n is an integer greater than 1;

[0017] The top plate of the outer casing has clearance holes corresponding to the polarity terminals of each individual battery cell; n individual batteries are arranged in the outer casing along a first direction; each polarity terminal extends out of the corresponding clearance hole; the clearance hole is fixedly sealed to the individual battery cell housing in the area corresponding to the top plate of the outer casing.

[0018] The aforementioned heat transfer component includes a heat transfer component body and inlet / outlet liquid pipe sections disposed at the ends of the heat transfer component body; the heat transfer component body is fixed on the portion of each individual cell's polar terminal that extends out of the clearance hole to cool the polar terminal.

[0019] The aforementioned baffle box is fixed to the end of the battery module in the first direction, and the inlet and outlet liquid pipes of the heat transfer component pass through the first opening of the baffle box and are located inside the baffle box.

[0020] This invention allows the polar terminals to extend out of the outer shell and fix heat transfer components on them, which can effectively remove the heat generated by the polar terminals in a timely manner, reduce problems such as increased battery internal resistance and loss of active materials caused by high temperature, thereby improving the battery's charging and discharging efficiency and cycle life.

[0021] Simultaneously, the sealant box is fixed to the end of the battery module in the first direction. The inlet and outlet liquid pipes of the heat transfer components pass through the first opening of the sealant box and are located inside the box. After assembling the battery pack, the inlet and outlet liquid pipes of each heat transfer component are connected using connecting pipes. Then, a second insulating sealant layer is filled into the box. When the ambient humidity increases and condensation occurs, the second insulating sealant layer can effectively prevent condensation droplets from directly contacting the pipes located in the inner cavity of the box. This protective measure can prevent short circuits caused by condensation, ensure the circuit safety of the battery pack temperature control system, and prevent serious safety accidents such as battery failures or even fires caused by short circuits. At the same time, the sealant, with its good fluidity and plasticity, can automatically fill the tiny gaps at the connection between the inlet and outlet liquid pipes of the heat transfer components and the connecting pipes, achieving secondary sealing and continuously ensuring the reliability of the seal.

[0022] Furthermore, the electrolyte and / or gas are shared among the individual cells. The electrolyte and / or gas within each individual cell are interconnected, placing all cells in the same system. This reduces differences between individual cells, improves consistency, and consequently enhances the cycle life of the battery assembly.

[0023] Furthermore, a first insulating sealant layer is provided on the top plate of the outer casing, and at least a portion of the structure of the heat transfer component is located within the first insulating sealant layer. The first insulating sealant layer can isolate external moisture, reduce internal humidity changes, prevent water droplets from forming on the surface of the heat transfer component and polarized terminals, and prevent short circuits and component corrosion caused by condensation.

[0024] The third aspect of this utility model provides a battery pack, including a connecting pipe section and m of the above-mentioned battery components arranged along a second direction; wherein m is an integer greater than 1, and the second direction is perpendicular to the first direction;

[0025] The aforementioned connecting pipe section passes through the second opening into each baffle box and connects the inlet and outlet liquid pipe sections of each heat transfer component, thereby realizing the connection of heat transfer components in all battery components.

[0026] All the rubber-proof boxes are lined with a second insulating sealant layer, which covers the tube located in the inner cavity of the box.

[0027] Furthermore, the aforementioned connecting pipe section includes a first pipe and a second pipe;

[0028] Each battery component includes two heat transfer components. The two heat transfer components extend along a first direction and are arranged along a second direction. They are fixed on the polar terminals on different sides of each individual battery cell to cool the polar terminals.

[0029] Among the m battery components, the outermost battery component along the second direction, the inlet and outlet liquid pipes of the two heat transfer components located in the same baffle box are respectively connected to a first pipe, and the two first pipes pass through the second opening and are located outside the baffle box, serving as the total liquid inlet and the total liquid outlet.

[0030] In another outermost battery component along the second direction, the inlet and outlet liquid pipes of the two heat transfer components located in the same baffle box are connected by a second pipe, serving as a loop turning point.

[0031] The inlet and outlet pipes of the two heat transfer components in the remaining baffle box are each connected to a first pipe. The two first pipes pass through the two second openings of the adjacent baffle box and are connected to the inlet and outlet pipes of the two heat transfer components in the adjacent baffle box one by one.

[0032] After entering the main inlet, the coolant flows through one of the heat transfer components of each battery component in sequence, and then through the loop turning point, it flows through the other heat transfer component of each battery component in sequence, and flows out from the main outlet.

[0033] This invention uses the same-side inlet and outlet pipes of the two heat transfer components of the outermost battery component as the main inlet and outlet, respectively. The heat transfer components of each intermediate battery component are connected in series in a predetermined order. At the same time, the same-side inlet and outlet pipes of the two heat transfer components of the other outermost battery component are connected in series as loop turning points. After the coolant enters the main inlet, it flows through one heat transfer component (inlet heat transfer component) in each battery component in sequence. Then, through the loop turning point, it flows through another heat transfer component (outlet heat transfer component) in each battery component in sequence and flows out from the main outlet.

[0034] This series-connected fluid path design allows the coolant to flow sequentially through each battery component, carrying away the heat generated by each component. During the coolant flow, each battery component receives relatively even cooling, avoiding temperature differences caused by insufficient or excessive cooling of some components, and achieving uniform temperature distribution across the entire battery pack.

[0035] The beneficial effects of this utility model are:

[0036] This invention fixes heat transfer components to the polarity terminals of each individual battery cell in a battery module, enabling effective heat exchange within the battery module. This reduces problems such as increased internal resistance and loss of active materials caused by high temperatures, thereby improving the battery's charge / discharge efficiency and cycle life.

[0037] Simultaneously, a baffle box is fixed to the battery module. After assembling the battery pack based on the aforementioned battery modules, the connection parts of the heat transfer components extending from the battery modules and some connecting pipe sections are placed inside the baffle box. Then, a second insulating sealant layer is laid inside the baffle box, thereby forming a relatively sealed and insulated space. When condensation occurs due to changes in ambient humidity, the second insulating sealant layer inside the baffle box can effectively prevent condensation droplets from directly contacting the pipes inside the box, preventing short circuits in live parts caused by condensation accumulation. At the same time, this second insulating sealant layer can isolate moisture from the pipes inside the box, preventing accelerated corrosion of the pipes due to long-term contact with moisture, greatly ensuring the safety and stability of the heat transfer components, thereby maintaining the normal operation of the entire battery pack temperature control system and reducing the risk of dangerous conditions such as thermal runaway of the battery. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of the adhesive shield box in Example 1;

[0039] Figure 2 This is an exploded structural diagram of the shielding box in Example 1;

[0040] Figure 3 This is a schematic diagram of the battery component in Example 2;

[0041] Figure 4 This is a schematic diagram of the exploded structure of the battery component in Example 2;

[0042] Figure 5 This is a cross-sectional view of the battery component in Example 2;

[0043] Figure 6 This is a cross-sectional view of the battery component in Example 3;

[0044] Figure 7 This is a schematic diagram of the battery pack structure in Example 4. Figure 1 ;

[0045] Figure 8 This is a schematic diagram of the battery pack structure in Example 4. Figure 2 ;

[0046] Figure 9 This is a schematic diagram of one connection method for the various heat transfer components in the battery pack of Example 4;

[0047] Figure 10 This is a schematic diagram of another connection method for the various heat transfer components in the battery pack of Example 4.

[0048] The attached figures are labeled as follows:

[0049] 1. Glue-blocking box; 10. Sealing base plate; 11. Open end; 12. First side wall; 13. Second side wall; 14. First opening; 15. Second opening; 16. Positioning ring; 17. Third side wall; 18. Slot; 19. Wire clip; 2. Battery component; 22. Heat transfer component; 221. Inlet / outlet liquid pipe section; 23. Single cell; 24. Polar terminal; 25. Outer shell; 26. Clearance hole; 28. Insulating seal; 29. ​​Electrolyte shared chamber; 20. Gas shared chamber; 3. Battery pack; 31. First pipe; 32. Second pipe; a. Main liquid inlet end; b. Main liquid outlet end; c. Circuit turning point; 4. First insulating sealant layer. Detailed Implementation

[0050] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0051] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0052] In the description of this utility model, it should be noted that the terms "top," "bottom," 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 do not 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. Furthermore, the terms "first," "second," "third," "fourth," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0053] Currently, common battery modules (also known as battery packs) are composed of multiple individual cells (which are generally cylindrical or square) connected together in series, parallel, or a combination of series and parallel connections.

[0054] Temperature control of battery modules has always been a hot topic in this field. Most existing battery modules use air cooling or liquid cooling to control the temperature of the entire battery module. However, since the terminals of individual cells in the battery module are the parts with the most concentrated heat, if the local heat of the terminals is too high, it is very likely to cause thermal runaway of the individual cells in the battery module.

[0055] To solve the above problems, this utility model fixes heat transfer components on the polarity terminals of each individual battery cell, and performs heat exchange on the battery module based on the heat transfer components.

[0056] After assembling the battery pack based on the aforementioned battery modules, the various heat transfer components are connected in a certain way through external connecting pipes, and the connection points of the heat transfer components and the connecting pipes extend out of each battery module, leaving them directly exposed. When the ambient humidity is high and the temperature fluctuates, condensation is easily generated on these exposed areas. The water droplets formed by condensation can lead to several adverse consequences. Firstly, if condensation drips, the water droplets may seep into the charged parts of the battery modules. Once these charged parts are wetted, short circuits may occur, affecting the normal power supply of the battery modules. Secondly, the long-term presence of moisture at the connection points and connecting pipes will accelerate the corrosion of components, shorten the service life of the heat transfer components, and in severe cases, may even cause the heat transfer components to break, causing the battery pack's temperature control system to fail. This greatly threatens the safety and stability of the battery modules and increases the risk of dangerous conditions such as thermal runaway.

[0057] To overcome the aforementioned problems, this invention incorporates a baffle box on each battery module. The heat transfer components extending from the battery module, along with some connecting pipe sections, are placed within the baffle box. A second insulating sealant layer is then laid inside the baffle box, creating a relatively sealed and insulated space. When condensation occurs due to changes in ambient humidity, the second insulating sealant layer within the baffle box effectively prevents condensation droplets from directly contacting the pipes inside the box, preventing short circuits in live parts caused by condensation. Simultaneously, this second insulating sealant layer isolates moisture from the pipes inside the box, preventing accelerated corrosion due to prolonged moisture contact. This significantly ensures the safety and stability of the heat transfer components, thereby maintaining the normal operation of the entire battery pack temperature control system and reducing the risk of thermal runaway or other dangerous conditions.

[0058] It should be noted that:

[0059] 1. The polarity terminal of the single battery described in this utility model can be a single battery terminal post, or it can be an integral structure of a single battery terminal post and a terminal post extension member connected thereto.

[0060] 2. The heat transfer component mentioned above can be a heat transfer tube, which achieves heat exchange through direct contact between the tube wall and the polarity terminal of the battery module.

[0061] The aforementioned heat transfer component can also be a heat exchanger, with at least a portion of the polar terminal located within the heat exchanger's inner cavity and in direct contact with the coolant. Heat exchange is achieved based on the direct contact between the polar terminal and the coolant.

[0062] 3. The battery module mentioned above includes a housing and multiple individual batteries, which are arranged along the first direction (x direction) and placed inside the housing cavity.

[0063] This utility model does not specifically limit the above-mentioned shell structure, but at least the following two structures can be adopted:

[0064] The first structure includes a cylindrical body with open ends (i.e., the port parallel to the yz plane is the open end) and end plates fixed to the two open ends of the cylindrical body (i.e., the end plates are parallel to the yz plane).

[0065] The second structure includes a cylindrical body with open ends at the top and bottom (i.e., the port parallel to the xy plane is the open end) and a top plate and a bottom plate fixed to the open ends at the top and bottom of the cylindrical body respectively (i.e., the top plate and the bottom plate are both parallel to the xy plane, and the bottom plate or the top plate can be an integral structure with the cylindrical body).

[0066] A shared chamber can be provided inside the aforementioned casing, and the internal cavities of each individual battery cell can be connected based on the shared chamber.

[0067] It should be noted that:

[0068] The aforementioned shared chamber can be an electrolyte sharing chamber, with its inner cavity connected to the inner cavities of each individual battery cell. This shared chamber ensures that each individual battery cell is in a uniform electrolyte environment, guaranteeing electrolyte homogeneity and improving the battery module's performance and charge-discharge cycle life. The electrolyte sharing chamber described here is a liquid channel extending along the length of the casing between the casing's bottom plate and each individual battery cell. This liquid channel can be integrally formed with the casing's bottom plate or formed by a support structure between the individual battery's lower cover and the casing's bottom plate. It should be noted that in the first type of casing structure, the casing's bottom plate here is a cylindrical bottom plate; in the second type of casing structure, the casing's bottom plate here is a base plate.

[0069] The aforementioned shared chamber can also be a gas-sharing chamber located on the top plate of the outer casing, covering the gas ports on the top of each individual battery cell in the battery module.

[0070] It should be noted that in the first type of shell structure, the top plate of the shell here is the top plate of the cylinder; in the second type of shell structure, the top plate of the shell here is the top plate.

[0071] It should also be noted that the gas port here has the following two meanings:

[0072] 1) The gas port is a through hole directly opened on the top cover of the single cell and penetrating the inner cavity of the single cell;

[0073] At this time, the gas-sharing chamber is connected to the gas area of ​​each individual cell through the gas port. Based on the gas-sharing chamber, the gas areas of each individual cell can be connected to achieve gas balance, so that the gas of each individual cell is shared to ensure the consistency of each individual cell and improve the cycle life of the battery module to a certain extent. When any individual cell experiences thermal runaway, the flue gas in the inner cavity of that individual cell enters the gas-sharing chamber and is discharged through the gas-sharing chamber, improving the safety of the battery module.

[0074] 2) The gas port is a vent or explosion-proof port installed on the top cover of the individual battery, and a vent membrane is provided at the vent or explosion-proof port.

[0075] At this time, the gas sharing chamber is used as a venting channel. When the venting membrane at the gas port of any single battery cell is ruptured by the flue gas in the inner cavity, the inner cavity of that single battery cell and the gas sharing chamber are connected, and the flue gas inside is discharged through the gas sharing chamber, thereby improving the safety of the battery module.

[0076] The aforementioned shared chamber can also be a gas-liquid shared chamber. Through a gas-liquid shared chamber, each individual battery cell can be placed in a unified electrolyte environment and gas environment, thereby improving the performance of the battery module and its charge-discharge cycle life.

[0077] A clearance hole is made on the top plate of the outer casing corresponding to the polarity terminal of each individual battery; each polarity terminal extends out of the corresponding clearance hole, and the area of ​​the top plate of the outer casing corresponding to the clearance hole is fixedly sealed with the outer casing of the individual battery, so that the clearance hole area is sealed.

[0078] It should be noted that:

[0079] The area on the top plate of the outer casing corresponding to the clearance hole can be the area around the clearance hole on the top plate of the outer casing, or it can be the wall of the clearance hole.

[0080] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0081] Example 1

[0082] like Figure 1 The diagram shown is a structural schematic of the adhesive shield box 1 in this embodiment. The box has an open end 11 as an operation port. Based on the open end 11, the heat transfer component 22 can be connected to the connecting pipe section inside the box. The second insulating sealant layer can also be laid inside the box through the open end 11 to cover the pipe located inside the box.

[0083] As can be seen from the figure, the internal cavity of the box in this embodiment is L-shaped. The box is mainly composed of the first side wall 12, the third side wall 17, two second side walls 13 and the sealing bottom plate 10.

[0084] The first sidewall 12 and the third sidewall 17 are parallel and are both rectangular plates; the two second sidewalls 13 are parallel to each other and are both L-shaped plates, vertically fixed between the first sidewall 12 and the third sidewall 17; the narrower side of the L-shaped plate in the width direction is fixed to the first sidewall 12, and the wider side is fixed to the third sidewall 17; the first sidewall 12, the third sidewall 17, and the two second sidewalls 13 enclose a cylindrical component with an open top (operation port) and an open bottom; the sealing bottom plate 10 is composed of two horizontal plates and a vertical plate vertically connected between the two horizontal plates; it is fixed to the bottom open end 11 of the above-mentioned cylindrical component; wherein the horizontal plate connected to the first sidewall 12 is used to fit the edge area of ​​the top plate of the battery module housing in the horizontal direction, and the vertical plate is used to fit tightly against the end plate of the battery module housing in the vertical direction, which increases the contact area between the sealant box 1 and the battery module, so that the sealant box 1 can be better fixed on the battery module, providing a stable foundation for the subsequent laying of the second insulating sealant layer.

[0085] A first opening 14 is made in the first side wall 12, which penetrates the first side wall 12. The main function of this opening is to allow the inlet and outlet liquid pipes 221 of the heat transfer component to pass into the box body, thereby connecting with the connecting pipes inside the box body.

[0086] The first opening 14 can be designed as either a through groove or a through hole. In terms of size, it needs to be larger than the inlet / outlet liquid pipe section 221 of the heat transfer component. This is to ensure that the inlet / outlet liquid pipe section can pass smoothly through the opening without causing installation obstacles due to size limitations. However, the size of the first opening 14 cannot be too large, as this would greatly complicate subsequent sealing work. Because excessively large gaps are difficult to seal effectively using conventional methods, this would cause the adhesive to overflow from the gap when laying the second insulating sealant. This overflow not only wastes material but may also contaminate the battery module and surrounding components, affecting the overall performance of the battery pack 3.

[0087] After comprehensive consideration, this embodiment chooses to create a through hole as the first opening 14. Compared to a through groove, a through hole has a significant advantage in sealing. When using sealing materials such as sealant and gaskets, the circular hole can better conform to the shape of the sealing material, forming a tighter sealing structure.

[0088] A second opening 15 is made on each of the two second sidewalls 13, penetrating the second sidewall 13; the main function of this opening is to allow the connecting pipe section to pass into the box and connect with the inlet and outlet liquid pipe section 221 of the heat transfer component.

[0089] The second opening 15 can also be designed as either a through groove or a through hole. Similar to the first opening 14, the second opening 15 needs to be larger than the outer diameter of the connecting pipe section to ensure that the connecting pipe section can be smoothly inserted and avoid jamming during installation due to insufficient size. However, if the opening size is too large, it will also pose challenges to the subsequent sealing work. When laying the second insulating sealant layer, an excessively large opening gap may also cause a large amount of sealant to seep out, which not only wastes materials but may also contaminate other components of the battery module.

[0090] In this embodiment, the form of the second opening 15 can be selected according to the specific shape of the connecting pipe segment and the installation requirements. If the connecting pipe segments are circular and few in number, the through-hole form is more suitable. The circular through-hole can fit tightly against the circular connecting pipe segment, and when using sealant or sealing gaskets for sealing, it can maximize the effectiveness of the sealing material, forming a stable and tight sealing structure, effectively preventing the intrusion of external impurities. If the connecting pipe segments are irregularly shaped or numerous and closely arranged, the through-groove form may be more advantageous. The through-groove can be flexibly designed according to the distribution of the connecting pipe segments, facilitating the simultaneous passage of multiple pipe segments. Although the through-groove is relatively more difficult to seal, a good sealing effect can be achieved by reasonably selecting the sealing method, meeting the actual use requirements.

[0091] from Figure 1 As can be seen from the diagram, this embodiment also includes a positioning ring 16 on the inner wall of the second side wall 13. This positioning ring 16 is coaxial with the second opening 15 and extends into the inner cavity of the box. When the connecting pipe section is inserted into the second opening 15, the battery module may be affected by external forces such as vibration and displacement during actual operation. If the connecting pipe section lacks effective positioning, it is easy for it to shake or shift within the box. This may not only cause the connection between the connecting pipe section and the inlet / outlet liquid pipe section 221 of the heat transfer component to loosen, affecting the heat transfer efficiency, but may also cause damage to the connection part due to uneven force, thereby affecting the normal operation of the temperature control system of the entire battery pack 3. The positioning ring 16, through its coaxial design with the second opening 15, can constrain the connecting pipe section in the radial direction. When the connecting pipe section is inserted, the inner ring of the positioning ring 16 tightly fits against the outer wall of the connecting pipe section, providing stable support and effectively preventing radial displacement. From an installation perspective, the positioning ring 16 can be fixed to the inner wall of the second side wall 13 by various methods such as welding, snap-fitting, bonding, and integral molding.

[0092] like Figure 2 As shown, in this embodiment, the third side wall 17 of the box is fixed to the second side wall 13 and the sealing base plate 10 through a detachable connection structure.

[0093] Specifically, the detachable connection structure includes a slot 18 provided on the second side wall 13 and the sealing base plate 10, and the edge of the third side wall 17 is embedded in the slot 18 to achieve detachable fixation of the third side wall 17.

[0094] In some other embodiments, a bolt-nut detachable structure can also be used. That is, threaded holes are pre-drilled at corresponding positions on the second sidewall 13, the sealing base plate 10, and the third sidewall 17. By passing bolts through these threaded holes and tightening them with nuts, the third sidewall 17 can be detachably connected to other components.

[0095] When installing the connecting pipe section, technicians can first remove the third side wall 17. At this time, the side of the box is open, which makes it easier to insert the connecting pipe section into the second opening 15 and carry out subsequent connection operations, greatly reducing the installation difficulty and improving work efficiency.

[0096] In addition, based on the internal wiring layout and signal transmission requirements of the battery pack 3, structures such as wire clips 19 can be installed inside the box to facilitate signal output from this location. When the signal cable passes through the box, the clamps of the wire clips 19 secure the cable tightly, ensuring that the cable will not shake or tangle due to vibration or displacement of the battery module, thus guaranteeing the stability and reliability of signal transmission.

[0097] In this embodiment, the housing can be made of high-strength insulating engineering plastic material, manufactured through injection molding. High-strength insulating engineering plastic has excellent electrical insulation properties, effectively preventing safety issues such as short circuits caused by electrical conductivity within the housing, ensuring the safe operation of the battery pack 3. Simultaneously, it possesses high mechanical strength, capable of withstanding external forces such as vibration and impact generated during battery module operation, and is not prone to breakage or deformation. Injection molding is characterized by high efficiency and high precision. Injection molding can meet the needs of large-scale production and ensure the consistency of quality and performance of each housing, effectively reducing production costs.

[0098] Example 2

[0099] This embodiment is a battery component 2, which includes a battery module, two heat transfer components 22, and two baffle boxes 1 as in embodiment 1.

[0100] The specific structure is as follows: Figures 3 to 5As shown in the figure, the battery module in this embodiment includes a housing 25 and 12 individual battery cells 23 arranged along the x-direction within the cavity of the housing 25. In other embodiments, the number of individual battery cells 23 can be adjusted according to actual needs. The polarity terminals 24 of each individual battery cell 23 extend out of corresponding clearance holes 26. The positive terminals of the 12 individual battery cells 23 are arranged on one side, forming the total positive terminal of the battery module; the negative terminals of the 12 individual battery cells 23 are arranged on the other side, forming the total negative terminal of the battery module. In some other embodiments, the arrangement of the individual battery cells 23 can be adjusted according to the overall capacity requirements of the battery module to adjust the series and parallel connection method of each individual battery cell 23.

[0101] The heat transfer component 22 includes a heat transfer component body and an inlet / outlet liquid pipe section 221 disposed at the end of the heat transfer component body; each heat transfer component 22 extends along the x-direction, and two heat transfer components 22 are arranged along the y-direction, with the two heat transfer component bodies respectively fixed to the polarity terminals 24 on different sides. In this embodiment, one heat transfer component body is fixed to the main positive terminal of the battery module, and the other heat transfer component body is fixed to the main negative terminal of the battery module.

[0102] Two adhesive shields 1 are fixed at both ends of the battery module along the x-direction. Specifically, adhesive can be applied to the edge area of ​​the top plate of the battery module housing, part of the end plate (the side wall of the housing parallel to the yz plane), and between the horizontal and vertical plates of the sealing bottom plate. Through the adhesive effect of the adhesive, the adhesive shields 1 are bonded to the housing 25, ensuring that the adhesive shields 1 will not be displaced during the operation of the battery module and effectively play their protective role.

[0103] The two inlet and outlet liquid pipe sections 221 of each heat transfer component pass through the first opening 14 of the corresponding baffle box and extend into the interior of the baffle box 1.

[0104] It should be noted that the inlet / outlet pipe section 221 of each heat transfer component can be integrated with the heat transfer component 22 or can be a separate component. When using an integrated design, the inlet / outlet pipe section 221 of the heat transfer component can be simultaneously inserted into the box during the process of fixing the baffle box 1 to the battery module. If using a separate design, there are two installation sequences. First, the baffle box 1 can be fixed to the battery module first, and then the inlet / outlet pipe section 221 of the heat transfer component can be connected to the heat transfer component 22 through the first opening 14. Second, the inlet / outlet pipe section 221 of the heat transfer component can be connected to the heat transfer component 22 first, and then the baffle box 1 can be fixed to the battery module while the inlet / outlet pipe section 221 of the heat transfer component is inserted into the box. Regardless of the design and installation method used, it is necessary to ensure that the connection between the inlet / outlet pipe section and the heat transfer component 22, the baffle box 1, and the battery module is stable and well-sealed to ensure the normal operation and safety performance of the battery component 2.

[0105] In some other embodiments, a U-shaped heat transfer component may also be used, which includes two parallel sub-tubes and an intermediate connecting pipe section; the ends of the two parallel sub-tubes are connected to inlet and outlet liquid pipe sections.

[0106] When installing the U-shaped heat transfer component, its two parallel sub-tubes are fixed to the main positive terminal and the main negative terminal of the battery module, respectively, and the middle connecting pipe section is placed on the top plate of the outer casing 25. For heat transfer components 22 with this structure, it is only necessary to fix the baffle box 1 at one end of the battery module, and the liquid inlet and outlet pipe sections of the two sub-tubes pass through the first opening 14 of the baffle box 1 and are located inside the baffle box 1.

[0107] A support extending in the x-direction can be provided between the bottom plate of the outer casing 25 and each individual battery cell 23 to form a liquid channel, serving as an electrolyte sharing chamber 29.

[0108] The top plate of the outer casing 25 may also be provided with a boss extending in the x direction, and a gas channel is opened on the boss, which serves as a gas sharing chamber 20.

[0109] The assembly of battery component 2 can be achieved through the following process:

[0110] First, place 12 individual batteries 23 inside the housing 25, so that each polarity terminal 24 extends out of the corresponding clearance hole 26, and fix and seal the top plate of the housing 25 corresponding to the clearance hole 26 to the housing body of the individual battery 23.

[0111] In this embodiment, the edge of the clearance hole 26 near the single cell 23 is welded to the upper cover plate of the single cell 23 to achieve a sealed connection. When there is a certain gap between the two, solder can be filled in the gap and welded to avoid the external environment from interfering with the internal environment of the large-capacity battery through the gap between the clearance hole 26 and the terminal post.

[0112] In addition to the welding method used in this embodiment, in some other embodiments, laser welding can also be used to weld the area around each clearance hole 26 on the top plate of the outer casing 25 and the area around the electrode post on the upper cover of the corresponding single cell 23. However, this welding method requires a high top plate wall thickness (a thicker top plate may result in poor welding effect, while a thinner top plate may result in high temperature damage inside the single cell 23).

[0113] Furthermore, due to the small gap size between the polarity terminal 24 of the individual battery 23 and the clearance hole 26, the insulation between the polarity terminal 24 of the individual battery 23 and the top plate of the casing 25 may be difficult to ensure. Additionally, if thermal runaway occurs, cracks may appear at the weld between the clearance hole 26 and the top cover of the individual battery 23, causing thermal runaway fumes to leak from that location. Therefore, if… Figure 5As shown, in this embodiment, an insulating seal 28 is provided in the gap between each clearance hole 26 and the polarity terminal 24. This insulating seal ensures insulation between the polarity terminal 24 and the top plate of the housing 25. Furthermore, even if leakage occurs at the welded location, the insulating seal acts as a second barrier to prevent leakage of thermal runaway fumes. It should be noted that... Figure 5 In order to make it easier to show the position of the clearance hole 26, no insulating seal 28 is provided on one side of the clearance hole 26.

[0114] Then, the heat transfer component 22 is fixed to the polar terminal 24, and the baffle box 1 is fixed on the outer shell 25, so that the liquid inlet and outlet pipe section 221 of the heat transfer component passes through the first opening 14 and extends into the box body.

[0115] Example 3

[0116] This embodiment is based on embodiment 2, such as Figure 6 As shown, a first insulating sealant layer 4 is laid on the top plate of the outer casing 25.

[0117] The first insulating sealant layer 4 covers at least a portion of the structure of the heat transfer member 22 and the polar terminal 24. When the heat transfer member is not an electrical conductor, the top of the heat transfer member 22 exposes the first insulating sealant layer 4, which can serve as an electrical connection part.

[0118] During the operation of battery component 2, internal temperature changes may cause moisture condensation. The first insulating sealant layer 4 can isolate external moisture, reduce internal humidity changes, and prevent water droplets from forming on the surfaces of heat transfer component 22 and polar terminal 24, thus preventing short circuits and component corrosion caused by condensation. In addition, partially encasing heat transfer component 22 and polar terminal 24 within the structure makes the connections between components tighter, reducing relative displacement between components under conditions such as vibration and impact, and enhancing the structural stability of the entire battery component 2.

[0119] It should be noted that when laying the first insulating sealant layer 4, the gap between the first opening 14 and the inlet / outlet liquid pipe section 221 of the heat transfer component needs to be sealed first.

[0120] Example 4

[0121] This embodiment is a battery pack 3, such as Figure 7 and Figure 8 The figures shown are schematic diagrams of the battery pack 3 from different perspectives in this embodiment, including four battery components 2 arranged along the y-direction as described in the above embodiments. In other embodiments, the number of battery components 2 can be adjusted according to actual needs.

[0122] Figure 7 and Figure 8 Taking the battery component 2 in Example 3 as an example, the first insulating sealant layer 4 is not shown in the figure.

[0123] Combination Figure 7 , Figure 8 , Figure 9 and Figure 10 As can be seen, in this embodiment, the battery pack 3 includes a first pipe 31 and a second pipe 32, and the heat transfer components 22 are connected in the following two series connection methods:

[0124] The first type of series connection: such as Figure 9 As shown, taking the battery pack 3, which includes three battery components 2, as an example, the two straight lines extending along the x-direction at the top represent two heat transfer components 22 in one battery component 2, the two straight lines extending along the x-direction in the middle represent two heat transfer components 22 in the second battery component 2, and the two straight lines extending along the x-direction at the bottom represent two heat transfer components 22 in the third battery component 2.

[0125] In each of the two heat transfer components 22 of a battery component 2, the upper one can be the heat transfer component 22 fixed to the total positive terminal, and the lower one can be the heat transfer component 22 fixed to the total negative terminal.

[0126] The main inlet a and main outlet b are configured as follows: Figure 7 and Figure 8 In the y-direction, select one of the outermost battery components 2, and connect the inlet and outlet liquid pipe sections 221 of the two heat transfer components located in the same baffle box 1 to a first pipe 31 respectively. The two first pipes 31 pass through the second opening 15 and are located outside the baffle box 1, serving as the main liquid inlet a and the main liquid outlet b (in the figure, a is the main liquid inlet a, and b is the main liquid outlet b). The coolant enters the system from the main liquid inlet a, and after heat exchange, flows out from the main liquid outlet b.

[0127] Loop turning point c setting: In the y direction, the inlet and outlet liquid pipe sections 221 of the other outermost battery component 2, which are located in the same baffle box 1, are connected through the second pipe 32 to serve as loop turning point c; (as shown in the figure c), guiding the coolant to change its flow direction and forming a complete circulation path.

[0128] Remaining inlet and outlet pipe section connection rules (here, the remaining inlet and outlet pipe sections refer to the inlet and outlet pipe sections excluding the two heat transfer components 22 of one outermost battery component 2 located in the same baffle box 1 and the inlet and outlet pipe sections of the two heat transfer components 22 of the other outermost battery component 2 located in the same baffle box 1):

[0129] On the main liquid inlet a and main liquid outlet b sides of battery pack 3 ( Figure 9On the left side of the middle section, on every two adjacent battery components 2, among the four heat transfer components 22 arranged along the y-direction, the inlet and outlet liquid pipe sections 221 of two heat transfer components that are positioned alternately are connected in series by a first pipe 31; that is, the first pipe 31 passes through two second openings 15 on adjacent baffle boxes 1, and its two ends are connected in series with two inlet and outlet liquid pipe sections that are spaced one inlet and outlet liquid pipe section apart. Assuming that the inlet and outlet liquid pipe sections 221 of the four heat transfer components are A1, B1, C1, and D1 respectively, then A1 and C1, and B1 and D1 are connected in series.

[0130] On the other side, that is, the side opposite to or away from the main inlet a and the main outlet b ( Figure 9 On the right side of the middle section, on every two adjacent battery components 2, among the four heat transfer components 22 arranged along the y-direction, the inlet and outlet liquid pipe sections 221 of two heat transfer components that are positioned alternately are connected in series by a first pipe 31. That is, the first pipe 31 passes through two second openings 15 on adjacent baffle boxes 1, and its two ends are respectively connected to two inlet and outlet liquid pipe sections that are spaced one inlet and outlet liquid pipe section apart. Assuming that the inlet and outlet liquid pipe sections 221 of the four heat transfer components are A2, B2, C2, and D2 in sequence, then A2 and C2, and B2 and D2 are connected in series.

[0131] coolant according to Figure 9 The coolant flows in the direction indicated by the middle arrow. It enters the system from the main inlet a, passes through one heat transfer component 22 of the uppermost battery component 2, one heat transfer component 22 of the middle battery component 2, and one heat transfer component 22 of the lowermost battery component 2 in sequence. After passing through the loop turning node c, it passes through another heat transfer component 22 of the lowermost battery component 2, another heat transfer component 22 of the middle battery component 2, and another heat transfer component 22 of the uppermost battery component 2 in sequence, and flows out from the main outlet b, forming a complete circulation path within the system.

[0132] Coolant flows into the system from the main inlet a, and flows orderly through one heat transfer component 22 of each battery component 2, absorbing heat and gradually increasing in temperature. When the coolant reaches the loop turning point c, the flow direction changes, and it flows sequentially through another heat transfer component 22 of each battery component 2. Because the two heat transfer components 22 are arranged in parallel, the inlet / outlet temperature difference of each battery component 2 is basically the same, promoting temperature uniformity.

[0133] The second type of series connection: such as Figure 10 As shown, taking the battery pack 3, which includes three battery components 2, as an example, and... Figure 9 Similarly, the two straight lines extending along the x-direction at the top represent the two heat transfer components 22 in one battery component 2, the two straight lines extending along the x-direction in the middle represent the two heat transfer components 22 in the second battery component 2, and the two straight lines extending along the x-direction at the bottom represent the two heat transfer components 22 in the third battery component 2.

[0134] The settings of the main inlet a, main outlet b, and loop turning point c are as follows: Figure 9 same:

[0135] The main inlet a and main outlet b are configured as follows: In the y-direction, select one of the outermost battery components 2, and connect the inlet and outlet pipe sections 221 of the two heat transfer components located in the same baffle box 1 to a first pipe 31 respectively. The two first pipes 31 pass through the second opening 15 and are located outside the baffle box 1, serving as the main inlet a and main outlet b (in the figure, a is the main inlet a, and b is the main outlet b). Coolant enters the system from the main inlet a, and after heat exchange, flows out from the main outlet b.

[0136] Loop turning point c setting: In the y direction, the inlet and outlet liquid pipe sections 221 of the other outermost battery component 2, which are located in the same baffle box 1, are connected through the second pipe 32 to serve as loop turning point c; (as shown in the figure c), guiding the coolant to change its flow direction and forming a complete circulation path.

[0137] The connection rules for the remaining inlet and outlet pipe sections are different. Figure 9 :

[0138] On the main liquid inlet a and main liquid outlet b sides of battery pack 3 ( Figure 10 As shown on the left side, on every two adjacent battery components 2, among the four heat transfer components 22 arranged along the y-direction, the inlet and outlet liquid pipe sections 221 of the two adjacent heat transfer components are connected in series by a first pipe 31. That is, the first pipe 31 passes through two second openings 15 on the adjacent baffle box 1, and its two ends are connected in series with the two adjacent inlet and outlet liquid pipe sections respectively. The inlet and outlet liquid pipe sections 221 of the two heat transfer components located on the outside are also connected in series by a first pipe 31; that is, the first pipe 31 passes through two second openings 15 on the adjacent baffle box 1, and its two ends are connected in series with the two inlet and outlet liquid pipe sections of the two heat transfer components 22 on the outside respectively. Assuming that the inlet and outlet liquid pipe sections 221 of the four heat transfer components are A3, B3, C3, and D3 respectively, then A3 and D3, and B3 and C3 are connected in series.

[0139] On the other side, that is, the side opposite to the main inlet a and the main outlet b ( Figure 10As shown on the right side, on every two adjacent battery components 2, among the four heat transfer components 22 arranged along the y-direction, the inlet and outlet liquid pipe sections 221 of the two adjacent heat transfer components are connected in series by a first pipe 31. That is, the first pipe 31 passes through two second openings 15 on the adjacent baffle box 1, and its two ends are respectively connected to the inlet and outlet liquid pipe sections 221 of the two adjacent heat transfer components. The inlet and outlet liquid pipe sections 221 of the two outer heat transfer components are connected in series by a first pipe 31. That is, the first pipe 31 passes through two second openings 15 on the adjacent baffle box 1, and its two ends are respectively connected to the inlet and outlet liquid pipe sections 221 of the two outer heat transfer components. Assuming that the four heat transfer component inlet and outlet liquid pipe sections 221 are A4, B4, C4, and D4 respectively, then A4 and D4, and B4 and C4 are connected in series.

[0140] The inlet and outlet pipe sections 221 of each heat transfer component can be connected to the first pipe 31 or the second pipe 32 via clamps. After connection, the gap between the first pipe 31, the second pipe 32, and the second opening 15 is sealed. A second insulating sealant is laid inside each sealant box 1 to completely cover the pipes inside the box, effectively preventing condensation droplets from directly contacting the pipe parts inside the box. In addition, further sealing of the connection points can be achieved to prevent coolant leakage and ensure the stable operation of the battery pack 3 thermal management system.

[0141] In other embodiments, the connection method between the inlet and outlet liquid pipe sections 221 of each heat transfer component and the first pipe 31 or the second pipe 32 can be adjusted according to actual needs. Welding, threaded connections, and other connection methods can be adopted. Welding connections can enhance the strength of the connection and reduce the risk of loosening at the connection point; threaded connections facilitate later maintenance and disassembly, enabling quick inspection or replacement of components in the pipeline.

[0142] In some other embodiments, when the heat transfer component 22 in the battery component 2 is a U-shaped heat transfer component, the heat transfer components can be connected in parallel. In this case, the connecting pipe section includes a main pipe and multiple branch pipes connected to the main pipe. The connecting pipe section passes through the second opening of each baffle box 1, and each branch pipe is connected to the inlet and outlet liquid pipe section of the U-shaped heat transfer component. To facilitate the installation of the connecting pipe section, the second opening adopts a through-slot structure.

[0143] The inlet and outlet pipe sections 221 of each heat transfer component can also be connected to the branch pipes via clamps. After the connection is completed, a second insulating sealant is laid inside each sealant box 1 to completely cover the pipes inside the box, effectively preventing condensation droplets from directly contacting the connection points. In addition, this can further seal the connection points, prevent coolant leakage, and ensure the stable operation of the battery pack 3 thermal management system.

Claims

1. A glue-blocking box, characterized in that: The device includes a housing with an open end serving as an operating port; a first opening penetrating the first sidewall of the housing for the inlet / outlet liquid pipes of a heat transfer component to pass through the housing; and second openings penetrating the two second sidewalls of the housing for connecting pipes to pass through the housing and connect with the inlet / outlet liquid pipes of the heat transfer component; wherein the first sidewall and the two second sidewalls are adjacent; and the inner cavity of the housing is filled with a second insulating sealant layer to cover the pipes located within the inner cavity of the housing.

2. The adhesive-blocking box according to claim 1, characterized in that: Both the first opening and the second opening are through holes.

3. The adhesive-blocking box according to claim 2, characterized in that: It also includes a positioning ring, which is disposed on the inner wall of the second side wall and coaxial with the second opening, for radial positioning of the connecting pipe section that passes through the second opening.

4. The adhesive-blocking box according to claim 3, characterized in that: The third sidewall of the box is fixed to the second sidewall by a detachable connection structure; wherein the third sidewall of the box is adjacent to the second sidewall.

5. The adhesive-blocking box according to claim 4, characterized in that: The detachable connection structure includes a slot formed on the second side wall, and the edge of the third side wall is embedded in the slot.

6. A battery component, characterized in that: Includes a battery module, a heat transfer component, and a baffle box as described in any one of claims 1 to 5; The battery module includes a casing and n individual batteries, where n is an integer greater than 1; The top plate of the outer casing has clearance holes corresponding to the polarity terminals of each individual battery cell; n individual batteries are arranged inside the outer casing along a first direction; each polarity terminal extends out of the corresponding clearance hole; The clearance hole corresponds to the top plate area of ​​the outer casing and is fixedly sealed to the individual battery casing. The heat transfer component includes a heat transfer component body and an inlet / outlet liquid pipe section disposed at the end of the heat transfer component body; The heat transfer component extends along the first direction, and the main body of the heat transfer component is fixed on the part where the polar terminal of each individual battery extends out of the clearance hole to cool the polar terminal. The baffle box is fixed at the end of the battery module in the first direction, and the inlet and outlet liquid pipes of the heat transfer component pass through the first opening of the baffle box and are located inside the baffle box.

7. The battery component according to claim 6, characterized in that: The electrolyte and / or gas are shared among the individual cells.

8. The battery component according to claim 6, characterized in that: The top plate of the outer casing is provided with a first insulating sealant layer, and at least a portion of the structure of the heat transfer component is located within the first insulating sealant layer.

9. A battery pack, characterized in that: It includes a connecting pipe section and m battery components as described in any one of claims 6 to 8 arranged along a second direction; wherein m is an integer greater than 1, and the second direction is perpendicular to the first direction; The connecting pipe section passes through the second opening into each baffle box and connects the inlet and outlet liquid pipe sections of each heat transfer component, thereby realizing the connection of heat transfer components in all battery components. All the rubber-proof boxes are lined with a second insulating sealant layer, which covers the tube located in the inner cavity of the box.

10. The battery pack according to claim 9, characterized in that: The connecting pipe section includes a first pipe and a second pipe; Each battery component includes two heat transfer components. The two heat transfer components extend along a first direction and are arranged along a second direction, respectively fixed on the polar terminals on different sides of each individual battery cell to cool the polar terminals. Among the m battery components, the outermost battery component along the second direction, the inlet and outlet liquid pipes of the two heat transfer components located in the same baffle box are respectively connected to a first pipe, and the two first pipes pass through the second opening and are located outside the baffle box, serving as the total liquid inlet and the total liquid outlet. In another outermost battery component along the second direction, the inlet and outlet liquid pipes of the two heat transfer components located in the same baffle box are connected by a second pipe, serving as a loop turning point. The inlet and outlet pipes of the two heat transfer components in the remaining baffle box are each connected to a first pipe. The two first pipes pass through the two second openings of the adjacent baffle box and are connected to the inlet and outlet pipes of the two heat transfer components in the adjacent baffle box one by one. After entering the main inlet, the coolant flows through one of the heat transfer components of each battery component in sequence, and then through the loop turning point, it flows through the other heat transfer component of each battery component in sequence, and flows out from the main outlet.

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