Battery pack and electric device

Abstract

The invention relates to a battery pack and a power utilization device. The battery pack comprises a battery cell group, a heat exchange plate, an acquisition assembly and an isolation assembly, the battery cell group comprises a plurality of battery cells arranged side by side, all the battery cells form a heat exchange surface, and each battery cell comprises a pole located on the heat exchange surface. The heat exchange surface is concavely provided with a groove along a first direction intersected with the side-by-side direction of the battery cell group, and the pole column is positioned in the groove. And the heat exchange plate and the heat exchange surface are oppositely spaced in a first direction intersected with the side-by-side direction of the battery cell groups to form a glue filling space. And the acquisition assembly is arranged in the groove and comprises an acquisition terminal and an acquisition circuit board, and the acquisition circuit board extends along the side-by-side direction and is connected with the pole through the acquisition terminal. The isolation assembly is arranged in the groove and comprises a partition plate and a glue blocking piece, the collection assembly is supported on the partition plate, and the partition plate is arranged between the collection assembly and the heat exchange face in an insulating mode. And the glue blocking piece is matched with the partition plate so as to block the heat-conducting glue in the glue filling space from flowing to a flowing path of the acquisition circuit board. The use amount of the heat-conducting glue can be reduced, and the weight of the battery pack is reduced.

Description

Technical Field

[0001] This application relates to the technical field of battery packs, in particular to battery packs and electrical devices. Background Art

[0002] A battery pack is a key core component of an electric vehicle, and its performance and cost directly affect the large-scale application of electric vehicles. A battery pack usually consists of multiple battery cells connected in series and / or in parallel to meet voltage and power requirements. An acquisition component is arranged inside the battery pack to acquire data such as the temperature and voltage of each group of battery cells to monitor the working state of the battery pack.

[0003] During the working process, the battery cells generate heat, and a liquid cooling plate for cooling the battery cells is generally configured inside the battery pack. The acquisition component usually does not need to be cooled and is not in contact with the liquid cooling plate. To improve the heat transfer efficiency between the liquid cooling plate and the battery cells, a heat-conducting adhesive is usually filled in the gap between the liquid cooling plate and the battery cells. The flowing heat-conducting adhesive easily enters the space between the acquisition device and the liquid cooling plate, increasing the amount of heat-conducting adhesive used, and further making the weight of the entire battery pack relatively large, which is not conducive to realizing the lightweight of the battery pack. Summary of the Invention

[0004] Based on this, it is necessary to provide a battery pack and an electrical device for the problem that the large amount of heat-conducting adhesive leads to a relatively large overall weight of the battery pack, which is not conducive to realizing the lightweight of the battery pack.

[0005] In a first aspect, this application provides a battery pack, including: A battery cell group, including a plurality of battery cells arranged side by side. All the battery cells form a heat exchange surface, and each battery cell includes a pole column located on the heat exchange surface; the heat exchange surface is recessed with a groove along a first direction intersecting the side-by-side direction of the battery cell group, and the pole column is located in the groove; A heat exchange plate, which is spaced apart from the heat exchange surface in the first direction to form a glue filling space; An acquisition component, arranged in the groove, including an acquisition terminal and an acquisition circuit board. The acquisition circuit board extends along the side-by-side direction, and the acquisition circuit board is connected to the pole column through the acquisition terminal to acquire the state information of the battery cell group; An isolation component, arranged in the groove, including a partition board and a glue blocking member. The acquisition component is supported on the partition board, and the partition board is insulatingly arranged between the acquisition component and the heat exchange surface; the glue blocking member cooperates with the partition board to block the flow path of the heat-conducting adhesive in the glue filling space from flowing to the acquisition circuit board. + In some embodiments, the rubber blocking member includes a rubber blocking strip arranged between the partition and the heat exchange plate, the rubber blocking strip protruding from the heat exchange surface in the first direction and abutting against the heat exchange plate; two rubber blocking strips are spaced apart along the second direction to form a rubber blocking space together with the heat exchange plate, and at least part of the acquisition circuit board is located in the rubber blocking space; The first direction, the second direction and the parallel direction intersect each other and are not coplanar.

[0006] In some embodiments, the acquisition circuit board has a first end face facing the heat exchange plate, the rubber blocking strip is fixed on both side edges of the first end face along the second direction, and the rubber blocking strip, the first end face and the heat exchange plate together enclose the rubber blocking space.

[0007] In some embodiments, the rubber blocking strip is configured as a deformable member that can be compressively deformed in the first direction.

[0008] In some embodiments, two partition bars are protruding from the side of the partition away from the heat exchange surface, and the two partition bars are spaced apart along the second direction. The collection circuit board is located between the two partition bars, and the rubber blocking strip is fitted with the partition bars. Each of the partition bars is provided with a notch for the collection terminal to pass through.

[0009] In some embodiments, in the first direction, the rubber blocking strip is arranged higher than the spacer strip.

[0010] In some embodiments, the battery cell group includes an explosion-proof valve, and the explosion-proof valve is arranged on a second end surface where the battery cell group intersects with the heat exchange surface.

[0011] In some embodiments, the battery pack includes a rubber stopper assembly, the rubber stopper assembly forms a pressure relief channel, and the explosion-proof valve is connected to the pressure relief channel.

[0012] In some embodiments, the rubber baffle assembly includes a first rubber baffle plate and a second rubber baffle plate, both of which extend longitudinally along the side-by-side direction. The first rubber baffle plate is arranged on the second end face and is provided with an avoidance hole for avoiding the explosion-proof valve. The second rubber baffle plate is assembled and connected to the first rubber baffle plate, and the two together form the pressure relief channel. The avoidance hole connects the explosion-proof valve and the pressure relief channel.

[0013] In some embodiments, one of the first rubber baffle plate and the second rubber baffle plate is provided with a slot, and the other is provided with a hook, and the slot and the hook are both extended along the parallel direction, and the hook can be inserted into the slot along the parallel direction and hooked with the slot.

[0014] In some embodiments, the battery cell group includes end plates located at both ends in the side-by-side direction, and the first glue baffle is connected to the end plates in a limiting manner.

[0015] In some embodiments, one of the end plate and the first glue baffle is provided with a limiting groove, one end of the limiting groove is open in its own extending direction, and the other is provided with a limiting protrusion, and the limiting protrusion is inserted into the limiting groove in a concave-convex mating manner along the open end of the limiting groove.

[0016] In some embodiments, the limiting protrusion includes a first part and a second part that intersect, the first part penetrates through the notch of the limiting groove, and the second part is located in the limiting groove; in the width direction of the limiting groove, the size of the second part is larger than that of the first part.

[0017] In a second aspect, the present application provides an electrical device, including the battery pack according to any one of the above embodiments, and the battery pack is used to provide electrical energy.

[0018] Compared with the prior art, the present application has the following beneficial effects: For the above-mentioned battery pack and electrical device, by filling the heat-conducting glue into the glue-filling space between the heat exchange plate and the heat exchange surface of the battery cell group, the heat-conducting glue makes the heat conduction between the heat exchange plate and the heat exchange surface more uniform. Compared with the prior art, through the setting of the isolation component and the groove, the amount of the heat-conducting glue is effectively reduced, the weight of the battery pack is reduced, which is beneficial to realizing the lightweight of the battery pack. Moreover, the partition plate in the isolation component has the technical effect of multi-purpose use, which helps to reduce the weight of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. And in all the drawings, the same reference numerals are used to represent the same components. In the drawings: Figure 1 It is a schematic external view of a battery pack in some embodiments.

[0020] Figure 2 It is a schematic structural view of a battery cell group in some embodiments.

[0021] Figure 3 It is a schematic assembly view of the acquisition component and the battery cell group in a battery pack in some embodiments.

[0022] Figure 4 It is a schematic exploded view of a battery pack in some embodiments.

[0023] Figure 5 For Figure 4Cross-sectional view of the battery pack shown.

[0024] Figure 6 is Figure 5 the enlarged view of part A in

[0025] Figure 7 is Figure 5 the partial structural schematic diagram of the battery pack shown.

[0026] Figure 8 is Figure 7 the enlarged view of part B in

[0027] Figure 9 is Figure 7 the partial exploded schematic diagram of the structure shown.

[0028] Figure 10 is the exploded schematic diagram of the battery pack of some other embodiments.

[0029] Figure 11 is Figure 10 the cross-sectional view of the battery pack shown.

[0030] Figure 12 is Figure 11 the enlarged view of part C in

[0031] Figure 13 is Figure 11 the partial structural schematic diagram of the battery pack shown.

[0032] Figure 14 is Figure 13 the enlarged view of part D in

[0033] Figure 15 is Figure 13 the enlarged view of part E in

[0034] Figure 16 is the partial structural schematic diagram of the battery pack of some embodiments.

[0035] Figure 17 is Figure 16 the enlarged view of part F in

[0036] Figure 18 is Figure 17 the exploded schematic diagram of the structure shown.

[0037] Figure 19 is the partial structural schematic diagram of the battery pack of some embodiments.

[0038] Figure 20 is the structural schematic diagram of the first rubber baffle of some embodiments.

[0039] Figure 21 is the internal structural schematic diagram of the battery pack of some embodiments.

[0040] The reference numerals in the specific embodiments are as follows: 100, battery pack; 10, battery cell group; 11, battery cell; X, side-by-side direction; Z, first direction; Y, second direction; S, heat exchange surface; 11a, terminal; 11b, groove; 11c, explosion-proof valve; d2, second end face; 12, end plate; 20, heat exchange plate; k1, glue filling space; 21, flow channel; 30, acquisition component; 31, acquisition circuit board; d1, first end face; 32, acquisition terminal; 40, isolation component; 41, partition board; c1, isolation groove; 41a, flanging; a1, first side strip; a2, second side strip; 41b, partition strip; b1, notch; 42, glue blocking part; 42a, cover plate; 42b, glue blocking strip; k2, glue blocking space; 50, bus bar component; 60, glue blocking component; t, pressure relief channel; 61, first glue blocking plate; 62, second glue blocking plate; h, avoidance hole; g1, clamping groove; g2, hook; p1, limiting groove; p2, limiting protrusion; p21, first part; p22, second part; 70, box body; 71, surrounding beam; k3, placement space; k31, sub-space; 72, middle beam; k4, exhaust space; 80, box cover. Specific embodiments

[0041] In order to make the above objects, features, and advantages of the present application more obvious and understandable, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0042] In the description of the present application, it should be understood that if present, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0043] In addition, if present, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0044] In this application, unless otherwise clearly specified and limited, if present, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0045] In this application, if present, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0046] It should be noted that if present, when an element is referred to as "fixed to" or "disposed on" another element, it may be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0047] In view of the problem that the large amount of thermal conductive adhesive leads to a relatively large weight of the battery pack, which is not conducive to the lightweight of the battery pack, this application first provides a battery pack.

[0048] For ease of understanding, some structures / components involved in the embodiments of this application are introduced accordingly first.

[0049] In the embodiments of the present application, the battery pack involved can be used as a power source for an electrical device to provide electrical energy for the electrical device. The electrical device can be, but is not limited to, a mobile phone, a tablet computer, a laptop computer, an electric toy, an electric tool, a battery car, an electric vehicle, a ship, etc. Taking the electrical device as a vehicle as an example, the battery can be arranged at the tail, head or bottom of the vehicle, and the battery can provide electrical energy for the drive of the vehicle and also for the control system of the vehicle.

[0050] The battery pack includes a sealed box, and the sealed box protects the internal components of the battery pack. In some embodiments, referring to Figure 1 , the sealed box includes a box body 70 and a box cover 80. The box body 70 forms a receiving space with one end open, and the box cover 80 covers the open end of the box body 70 to close the receiving space. The internal components of the battery pack 100 are housed in the receiving space. Of course, the sealed box can also adopt other conventional forms.

[0051] The battery pack 100 further includes a battery cell group 10 housed in the sealed box. Referring to Figure 2 , the battery cell group 10 is formed by arranging a plurality of battery cells 11 in a side-by-side direction X. In some embodiments, in order to fix the battery cells 11, end plates 12 are provided at both ends of the battery cell group 10 in the side-by-side direction X (refer to Figure 3 ), and the two end plates 12 can be fixed by side plates or other structures to bundle or clamp the plurality of battery cells 11 into a group. A plurality of battery cell groups 10 can be arranged in the battery pack 100. In other embodiments, the battery cells 11 in the battery cell group 10 can also be fixed by means such as gluing.

[0052] The battery cell 11 (also known as a battery monomer) is the smallest unit for the electro-chemical reaction of the battery pack 100. The battery cell 11 can be a soft-pack structure, a hard-shell structure, etc. Specifically, the battery cell 11 can be a square battery cell, a cylindrical battery cell or other types. The battery cell 11 generally includes a packaging member and an electrode assembly, and the electrode assembly is encapsulated in the packaging member. In one embodiment, the packaging member includes a housing and an end cover, and the two jointly enclose a receiving cavity, and the electrode assembly is loaded in the receiving cavity. The housing and the end cover can be, but are not limited to, metal materials such as aluminum, steel, etc.

[0053] The electrode assembly generally includes a positive electrode sheet, a negative electrode sheet, and a separator that separates the positive electrode sheet and the negative electrode sheet. An electrolyte can be injected into the battery monomer, and the electrolyte can infiltrate into the electrode assembly to provide an ion migration path for the electrode assembly to carry out an electro-chemical reaction and play a role in conducting electricity. The electrode assembly can be in the form of a wound type, a stacked type, etc. One or more electrode assemblies can be loaded in the battery cell 11.

[0054] The battery cell 11 usually further includes a terminal 11a which has electrical conductivity. One end of the terminal 11a can extend out of the battery cell 11 to be connected to an external circuit, and the other end is directly or indirectly electrically connected to the tab of the electrode assembly. A connecting piece can be arranged between the terminal 11a and the tab to ensure reliable electrical connection between the terminal 11a and the tab. An explosion-proof structure (such as an explosion-proof valve 11c, explosion-proof indentation, etc.) can also be arranged on the battery cell 11 to relieve pressure when the internal pressure of the battery cell 11 is too high, reducing the explosion risk of the battery cell 11.

[0055] The battery pack 100 usually further includes a collection component 30 for collecting the operating data (temperature / voltage) of the battery cell 11. The battery pack 100 can also include a battery management system (BMS). The collection component 30 is connected to the BMS and sends the collected operating data of the battery cell 11 to the BMS.

[0056] Referring to Figure 3 , the collection component 30 includes a collection circuit board 31 and collection terminals 32. The collection terminals 32 are directly or indirectly connected to the terminal 11a for collecting the voltage / temperature data of the battery cell 11. In some embodiments, referring to Figure 3 , the battery pack 100 includes a busbar 50. The busbar 50 is electrically connected to the terminal 11a of the battery cell 11 by means of welding, clamping, etc. The collection terminals 32 are indirectly connected to the terminal 11a through the busbar 50.

[0057] The collection circuit board 31 can be an FPC (flexible printed circuit board), FCB (printed circuit board), etc., and is connected to the BMS through connection terminals to send the data collected by the collection terminals 32 to the BMS. The number of the collection terminals 32 is usually multiple, and they are respectively arranged on both sides in the width direction of the collection circuit board 31 to collect the data of multiple battery cells 11. The collection terminals 32 and the collection circuit board 31 can be welded or integrally connected to realize signal transmission. Optionally, the collection terminals 32 are composed of a metal foil coated with an insulating film. Optionally, the collection circuit board 31 extends in a strip shape along the side-by-side direction X of the battery cell group 10, and the collection terminals 32 are arranged on one side or both sides in its width direction, so that the collection component 30 can collect the voltage / temperature data of each battery cell 11 in the entire battery cell group 10.

[0058] The battery pack 100 in the embodiments of the present application will be introduced in detail below.

[0059] Referring to Figures 4 to 6 , and in combination with Figure 2, the battery pack 100 provided by the embodiment of the present application includes a battery cell group 10, a heat exchange plate 20, a collection component 30, and an isolation component 40. The battery cell group 10 includes a plurality of battery cells 11 arranged side by side. All the battery cells 11 form a heat exchange surface S. Each battery cell 11 includes a pole column 11a located on the heat exchange surface S. The heat exchange surface S is recessed with a groove 11b along a first direction Z intersecting the side-by-side direction X of the battery cell group 10, and the pole column 11a is located in the groove 11b. The heat exchange plate 20 and the heat exchange surface S are relatively spaced apart in the first direction Z intersecting the side-by-side direction X of the battery cell group 10 to form a glue filling space k1. The collection component 30 is disposed in the groove 11b and includes a collection terminal 32 and a collection circuit board 31. The collection circuit board 31 extends along the side-by-side direction X and is connected to the pole column 11a through the collection terminal 32 to collect the state information of the battery cell group 10. The isolation component 40 is disposed in the groove 11b and includes a partition 41 and a glue blocking member 42. The collection component 30 is supported by the partition 41, and the partition 41 is insulatingly disposed between the collection component 30 and the heat exchange surface S. The glue blocking member 42 cooperates with the partition 41 to block the flow path of the thermal conductive glue in the glue filling space k1 flowing towards the collection circuit board 31.

[0060] The side-by-side direction X of the battery cell group 10 is the arrangement direction of the battery cells 11 in the battery cell group 10. If the battery cell 11 is a square battery cell, the side-by-side direction X corresponds to the thickness direction of the battery cell 11. In a use state, the heat exchange surface S of the battery cell group 10 is located on one side or both sides in the height direction of the battery cell group 10, and the pole columns 11a of the battery cells 11 are arranged on the heat exchange surface S.

[0061] A flow channel 21 is provided in the heat exchange plate 20 (refer to Figure 6 ), and a heat exchange medium flows in the flow channel 21. The type of the heat exchange medium is not limited, and it can be a liquid phase, a gas phase, or a two-phase mixture. The presence of the heat exchange medium makes the temperature of the heat exchange plate 20 higher or lower than the temperature of the battery cell group 10, so that the heat exchange plate 20 can heat or cool the battery cells 11.

[0062] The heat exchange plate 20 and the heat exchange surface S are relatively spaced apart along the first direction Z, and a glue filling space k1 is formed therebetween (refer to Figure 6). In a use state, the first direction Z is the vertical direction, corresponding to the height direction of the battery cell group 10. The heat exchange plate 20 and the heat exchange surface S can conduct heat through the thermal conductive adhesive in the glue filling space k1, so that the heat exchange plate 20 can regulate the temperature of the battery cell group 10. Filling the thermal conductive adhesive between the heat exchange plate 20 and the heat exchange surface S makes the heat conduction effect more uniform. It should be noted that since the heat exchange plate 20 can entirely cover one or both sides in the height direction of the battery cell group 10, the end faces on one or both sides of the battery cell group 10 in its height direction can both be the heat exchange surface S. The heat exchange plate 20 can not only regulate the temperature in the glue filling space k1 through the glue filling space k1, but also contact with one or both end faces of the battery cell group 10 in the height direction to achieve temperature regulation and improve the heat exchange efficiency. That is, the thermal conductive adhesive can also be filled on one or both end faces of the battery cell group 10 in the height direction to achieve heat exchange with the heat exchange plate 20.

[0063] The groove 11b extends along the side-by-side direction X of the battery cell group 10 and penetrates through both ends of the battery cell group 10. The pole column 11a, the acquisition component 30, and the isolation component 40 are arranged in the groove 11b. In the conventional setting method, the pole column 11a usually protrudes from the heat exchange surface S. After arranging the acquisition component 30 and the isolation component 40 at the pole column 11a, the overall height of the battery cell 11 will be relatively large, resulting in a relatively large filling space between the heat exchange surface S and the heat exchange plate 20, a large amount of thermal conductive adhesive consumed, and an increase in the overall height, which is not conducive to space utilization. At this time, by setting the groove 11b on the heat exchange surface S, arranging the pole column 11a in the groove 11b, and correspondingly arranging the acquisition component 30 and the isolation component 40 in the groove 11b, the filling space can be reduced, the amount of thermal conductive adhesive used can be significantly reduced, and the weight of the battery pack 100 drops significantly. At the same time, the thermal conductive adhesive is filled in the glue filling space k1 so that the heat exchange plate 20 can regulate the temperature of the pole column 11a and improve the heat exchange efficiency. It should be noted that with the setting of the present application, the overall structural shape of the heat exchange plate 20 does not need to be changed, and the surface of the heat exchange plate 20 opposite to the heat exchange surface S is flat, avoiding problems such as poor heat exchange effect and difficult processing caused by changing the structure of the heat exchange plate 20.

[0064] The partition plate 41 has an insulating effect. It is arranged between the acquisition component 30 and the heat exchange surface S, and can play a role in insulating and isolating the battery cell 11 and the acquisition component 30, avoiding the adverse impact of the leakage of the battery cell 11 on the acquisition component 30. The partition plate 41 can be but is not limited to a plastic material. It is easy to understand that an avoidance position for avoiding the pole column 11a is provided on the partition plate 41 to allow electrical connection between the pole column 11a and the acquisition terminal 32, or between the acquisition terminal 32 and the bus bar 50. Figure 6 Understood in combination, when the battery pack 100 includes the bus bar 50, the bus bar 50 can be arranged on the partition plate 41 and is electrically connected to the pole column 11a through the avoidance position on the partition plate 41, and the acquisition terminal 32 is connected to the bus bar 50.

[0065] The glue-blocking member 42 is disposed on the side of the partition plate 41 away from the battery cell 11, and cooperates with the partition plate 41 to form an isolation space. At least the acquisition circuit board 31 is located in the isolation space to prevent the thermal conductive glue in the glue-filling space k1 from flowing towards the acquisition circuit board 31. The isolation assembly 40 can not only isolate the thermal conductive glue and the acquisition circuit board 31, but also insulate and isolate the acquisition assembly 30 and the battery cell 11. It serves multiple purposes, making the function of the isolation assembly 40 more abundant and simplifying the structure of the battery pack 100.

[0066] In the battery pack 100 according to the embodiment of the present application, by filling the glue-filling space k1 between the heat exchange plate 20 and the heat exchange surface S of the battery cell group 10 with thermal conductive glue, the heat conduction between the heat exchange plate 20 and the heat exchange surface S becomes more uniform. Compared with the prior art, through the arrangement of the isolation assembly 40 and the groove 11b, the amount of thermal conductive glue is effectively reduced, the weight of the battery pack 100 is reduced, which is beneficial to the lightweight of the battery pack 100. Moreover, the partition plate 41 in the isolation assembly 40 has the technical effect of serving multiple purposes, which helps to reduce the weight of the battery pack 100.

[0067] It should be noted that, in some embodiments, the acquisition assembly 30 is integrally arranged in the isolation space formed by the partition plate 41 and the glue-blocking member 42. In other embodiments, the acquisition terminal 32 is located outside the isolation space formed by the partition plate 41 and the glue-blocking member 42. When the acquisition terminal 32 is located outside the isolation space, the thermal conductive glue can flow to the acquisition terminal 32, covering the acquisition terminal 32, the pole column 11a and even the bus bar 50, and conducting their heat to the heat exchange plate 20 to prevent the temperature of the pole column 11a from being too high.

[0068] In some embodiments, in combination Figure 10 、 Figure 11 and Figure 12 , the glue-blocking member 42 includes a glue-blocking strip 42b disposed between the partition plate 41 and the heat exchange plate 20. The glue-blocking strip 42b protrudes from the heat exchange surface S in the first direction Z and abuts against the heat exchange plate 20. The two glue-blocking strips 42b are spaced apart along the second direction Y to jointly form a glue-blocking space k2 with the heat exchange plate 20. At least part of the acquisition circuit board 31 is located in the glue-blocking space k2. The first direction Z, the second direction Y and the side-by-side direction X intersect pairwise and are not coplanar.

[0069] The glue-blocking member 42 can be arranged along the extending direction of the acquisition circuit board 31 and is generally strip-shaped. The glue-blocking space k2 serves as an isolation space, and the glue-blocking strip 42b and the heat exchange plate 20 cooperate to prevent the thermal conductive glue from flowing towards the acquisition circuit board 31.

[0070] Specifically, one end of the glue-blocking member 42 abuts against the heat exchange plate 20, and the other end abuts against the partition plate 41. The three jointly form the glue-blocking space k2. At this time, the entire acquisition circuit board 31 is located in the glue-blocking space k2, and the acquisition terminal 32 can be located inside or outside the glue-blocking space k2.

[0071] Optionally, one end of the glue-blocking member 42 abuts against the heat exchange plate 20, and the other end abuts against the acquisition circuit board 31. A glue-blocking space k2 is jointly formed by the acquisition circuit board 31, the heat exchange plate 20, and the glue-blocking member 42. Only the first end face d1 of the acquisition circuit board 31 in the first direction Z is located in the glue-blocking space k2.

[0072] In any case, the glue-blocking member 42 can isolate the space between the acquisition circuit board 31 and the heat exchange plate 20 from the glue-filling space k1, effectively reducing the amount of thermal conductive glue used and reducing the weight of the battery pack 100.

[0073] Specifically, in some embodiments, in combination with Figure 13 、 Figure 14 and Figure 15 , the acquisition circuit board 31 has a first end face d1 disposed facing the heat exchange plate 20, and the glue-blocking strips 42b are fixed to two side edges of the first end face d1 along the second direction Y. The glue-blocking strips 42b, the first end face d1, and the heat exchange plate 20 jointly enclose to form a glue-blocking space k2.

[0074] There is a gap between the first end face d1 and the heat exchange plate 20. One end of the glue-blocking member 42 is disposed on the first end face d1 and is located on both side edges of the first end face d1 in the second direction Y. At this time, under the blocking of the glue-blocking member 42, the thermal conductive glue cannot flow into the space between the first end face d1 and the heat exchange plate 20, and the amount of thermal conductive glue used is significantly reduced.

[0075] Since the acquisition terminals 32 extend from both ends of the acquisition circuit board 31 in the second direction Y, by disposing the glue-blocking member 42 on the first end face d1, the glue-blocking member 42 will not interfere with the extension of the acquisition terminals 32, and there is no need to avoid the acquisition terminals 32, simplifying the structure of the glue-blocking member 42. Since the acquisition terminals 32 are located outside the glue-blocking space k2, they can be coated with thermal conductive glue to transfer heat to the heat exchange plate 20, which helps to reduce the heat of the pole post 11a connected to the acquisition terminals 32 and improve the situation of heat accumulation on the pole post 11a.

[0076] Furthermore, in the embodiment, referring to Figure 14 and Figure 15 , two partition strips 41b protrude from the side of the partition plate 41 facing away from the heat exchange surface S, and the two partition strips 41b are spaced along the second direction Y. The acquisition circuit board 31 is located between the two partition strips 41b, and the glue-blocking strips 42b are disposed in a fitting manner with the partition strips 41b. A notch b1 for the acquisition terminals 32 to pass through is formed on each partition strip 41b.

[0077] The two partition strips 41b are spaced to form a limiting space. When assembling the battery pack 100, the acquisition circuit board 31 is installed in the limiting space, and the acquisition terminals 32 extend out through the notches b1 on the partition strips 41b. In this way, the installation and positioning of the acquisition component 30 are realized through the arrangement of the partition strips 41b.

[0078] Specifically, the spacer strip 41b is disposed higher than the first end face d1 of the acquisition circuit board 31 in the first direction Z, so that the glue-resistant strip 42b supported on the first end face d1 can be disposed in contact with the spacer strip 41b in the second direction Y. In this way, a gap that can accommodate the thermal conductive glue can be avoided from being formed between the glue-resistant strip 42b and the spacer strip 41b, reducing the amount of thermal conductive glue used.

[0079] In a specific embodiment, referring to Figure 12 , in the first direction Z, the glue-resistant strip 42b is disposed higher than the spacer strip 41b. The spacer strip 41b mainly functions to position and install the acquisition component 30. If the height is set too high, the weight of the battery pack 100 will increase. At this time, by disposing the spacer strip 41b lower than the glue-resistant strip 42b, the material used for the spacer strip 41b can be reduced, and the weight of the battery pack 100 can be reduced.

[0080] It should be noted that in order to improve the support stability of the glue-resistant strip 42b on the first end face d1, the glue-resistant strip 42b and the first end face d1 can be fixedly connected by bonding or other means.

[0081] In some embodiments, the glue-resistant strip 42b is configured as a deformable member that can be compressed and deformed in the first direction Z.

[0082] Specifically, the glue-resistant member 42 can be a deformable member prepared from a flexible material (such as silicone, rubber, etc.), or a deformable member formed by an elastic telescopic structure. Exemplarily, the elastic telescopic structure includes two sleeve frames that enclose to form a closed space. The two sleeve frames are nested with each other and can approach or move away from each other in the first direction Z to change the height of the closed space. An elastic member is disposed in the closed space, and the elastic member is used to provide an elastic force that urges the two sleeve frames to move away from each other.

[0083] When assembling the battery pack 100, usually the thermal conductive glue is first coated on the heat exchange surface S and / or the heat exchange plate 20, and then pressure is applied to the heat exchange plate 20, so that the thermal conductive glue flows and fills the filling space k1 between the heat exchange surface S and the heat exchange plate 20. In addition, by setting the glue-resistant strip 42b to be compressible and deformable, during the application of pressure, the glue-resistant strip 42b can be compressed by a certain thickness, thereby controlling the thickness of the thermal conductive glue. Moreover, since the glue-resistant strip 42b is a deformable member, during the process of pressing down the heat exchange plate 20, the glue-resistant strip 42b and the heat exchange plate 20 are not in rigid contact, which can effectively avoid the concave deformation on the side of the heat exchange plate 20 in contact with the glue-resistant strip 42b, and reduce the risk of deformation and collapse of the internal flow channel 21 of the heat exchange plate 20.

[0084] Understandably, in some embodiments, the spacer strip 41b is set lower than the glue-blocking strip 42b in the first direction Z, which can prevent the heat exchange plate 20 from being hindered by the spacer strip 41b and deforming concavely when being pressed down. At the same time, the setting of the spacer strip 41b can also limit the height of the glue-blocking strip 42b in the first direction Z, avoiding excessive compression of the glue-blocking strip 42b, resulting in insufficient thermal conductive adhesive and affecting the heat exchange effect.

[0085] The above embodiments provide a solution that uses the glue-blocking space k2 formed by the glue-blocking strip 42b and the partition 41 as a heat-insulating space to prevent the thermal conductive adhesive in the glue-filling space k1 from flowing to the acquisition circuit board 31. The following embodiments will provide other configuration solutions for the isolation component 40.

[0086] In some embodiments, in combination with Figures 6 to 9 understanding, the partition 41 is formed with an isolation groove c1 that opens towards the heat exchange plate 20. The isolation groove c1 extends along the side-by-side direction X. The glue-blocking member 42 includes a cover plate 42a that covers the notch of the isolation groove c1. The acquisition circuit board 31 and the acquisition terminal 32 are both located in the isolation groove c1, and the cover plate 42a obstructs the flow path of the thermal conductive adhesive in the glue-filling space k1 towards the isolation groove c1.

[0087] Understandably, the isolation groove c1 is located on the side of the partition 41 opposite to the battery cell 11. At this time, the isolation groove c1 forms the isolation space in the above text. The acquisition circuit board 31 and the acquisition terminal 32 are both arranged in the isolation space. In this way, less thermal conductive adhesive flows to the acquisition circuit board 31 and the acquisition terminal 32, which can greatly reduce the amount of thermal conductive adhesive used, and the weight of the battery pack 100 is reduced significantly.

[0088] Specifically, the cover plate 42a can be arranged in the isolation groove c1 or outside the isolation groove c1, and there is no specific limitation.

[0089] In actual application, first install the acquisition component 30 into the isolation groove c1 through the notch of the isolation groove c1, and then cover the cover plate 42a to close the isolation groove c1. In this way, while blocking the thermal conductive adhesive and the acquisition component 30, it is also convenient for the installation of the acquisition component 30.

[0090] Specifically in some embodiments, referring to Figure 8 , flanges 41a are provided at both opposite ends of the partition 41 along the second direction Y. The flanges 41a are folded away from the heat exchange surface S. Each flange 41a includes a first side strip a1 and a second side strip a2 that are connected to each other. The first side strip a1 forms the groove side wall of the isolation groove c1. The second side strips a2 of the two flanges 41a extend towards each other and are spaced apart to form the notch of the isolation groove c1. The cover plate 42a is inserted into the isolation groove c1 and abuts against the second side strip a2 to cooperate with the flange 41a to jointly obstruct the flow path of the thermal conductive adhesive in the glue-filling space k1 towards the isolation groove c1. The first direction Z, the second direction Y, and the side-by-side direction X intersect pairwise and are not coplanar.

[0091] In a use state, the first direction Z corresponds to the vertical direction, and the second direction Y and the side-by-side direction X are two substantially perpendicular horizontal directions.

[0092] Specifically, after folding the edge portion of the partition plate 41 twice, a flanging 41a with a first side strip a1 and a second side strip a2 is obtained. The isolation groove c1 is formed by the interval between two opposite flangings 41a. Compared with the method of fixing other structures on the partition plate 41 by split connection to form the isolation groove c1, this method is simpler and more economical.

[0093] Moreover, a notch is formed by the interval between the second side strips a2 of the two flangings 41a. The cover plate 42a is inserted into the isolation groove c1 and closes the notch, which can reduce the space occupied by the isolation component 40 in the first direction Z, contribute to the space size of the glue filling space k1 in the first direction Z, and further reduce the amount of thermal conductive glue used.

[0094] It should be noted that the end surface of the cover plate 42a facing the heat exchange plate 20 in the first direction Z is usually in contact with the inner wall of the heat insulation groove, so that the cover plate 42a closes the notch.

[0095] In some embodiments, referring to Figure 7 and Figure 8 , the battery cell group 10 includes end plates 12 located in the side-by-side direction X, and the cover plate 42a is fixedly connected to the end plates 12.

[0096] Specifically, the fixing methods of the end plate 12 and the cover plate 42a include fastening connection, clamping, etc. For example, threaded holes are provided on both the cover plate 42a and the end plate 12, and screws are installed in the threaded holes of both to fix the two. Optionally, the screws are installed on the cover plate 42a and the end plate 12 along the first direction Z (which can be the vertical direction during actual use), which is easy to operate.

[0097] At this time, the cover plate 42a is fixedly installed by using the end plate 12, which is simple in operation, easy to implement, and can also save space.

[0098] Of course, in other embodiments, the cover plate 42a can also be fixedly connected to the partition plate 41.

[0099] In some embodiments, in combination with Figure 2 and Figure 4 it is understood that heat exchange surfaces S are arranged at both opposite ends of the battery cell group 10 in the first direction Z. A plurality of pole columns 11a are arranged on each heat exchange surface S of each battery cell 11, and a heat exchange plate 20 is correspondingly arranged for each heat exchange surface S.

[0100] Specifically, each battery cell 11 includes multiple sets of terminal groups, and each set of terminal groups includes two terminals 11a, namely the positive terminal and the negative terminal. Optionally, one set of terminal groups is provided for each heat exchange surface S. Understandably, the electrode assembly located inside the battery cell 11 includes multiple tab ears, and each tab ear is electrically connected to a corresponding terminal 11a.

[0101] Compared with the traditional configuration of only one positive terminal and one negative terminal, in this embodiment, multiple terminals 11a are configured on the battery cell 11, which can increase the current-carrying area between the tab ears and the terminals 11a, reduce the internal resistance of the battery, help improve the charge and discharge capacity of the battery cell 11, improve its low-temperature performance, reduce the charging time, and improve the temperature rise during fast charging.

[0102] In some embodiments, referring to Figure 2 , the battery cell group 10 includes an explosion-proof valve 11c, and the explosion-proof valve 11c is provided on the second end face d2 where the battery cell group 10 intersects with the heat exchange surface S.

[0103] Specifically, the second end face d2 is located at at least one end of the battery cell group 10 in the second direction Y. The explosion-proof valve 11c can be arranged on at least one second end face d2. At this time, the explosion-proof valve 11c avoids the heat exchange surface S, and the thermal conductive adhesive in the glue filling space k1 cannot cover the explosion-proof valve 11c, which will not affect the pressure relief of the explosion-proof valve 11c.

[0104] In some embodiments, referring to Figure 16 , the battery pack 100 further includes a glue-blocking component 60, and the glue-blocking component 60 is formed with a pressure relief channel t, and the explosion-proof valve 11c is communicated with the pressure relief channel t.

[0105] Specifically, the glue-blocking component 60 is arranged on the second end face d2 of the battery cell group 10, and the explosion-proof valve 11c extends into the pressure relief channel t formed by the glue-blocking component 60. When the explosion-proof valve 11c is opened, the high-pressure and high-temperature flue gas ejected from it can be smoothly discharged through the pressure relief channel t.

[0106] In actual application, in order to improve the temperature of the battery cell 11, in addition to filling the thermal conductive adhesive between the heat exchange surface S and the heat exchange plate 20, the thermal conductive adhesive can also be filled on the side of the battery cell 11 to improve the heat exchange efficiency between the battery cell 11 and the heat exchange plate 20. Specifically, the thermal conductive adhesive can be poured from above the box body and overflow from bottom to top along the height direction of the battery cell group 10 to a specified height. At this time, after the thermal conductive adhesive fills the side of the battery cell 11, it can overflow to the top surface in the height direction of the battery cell 11. Since the explosion-proof valve 11c is arranged on the side of the battery cell 11, at this time, a glue-blocking component 60 is arranged on the side of the battery cell 11, which can prevent the thermal conductive adhesive from covering the explosion-proof valve 11c and ensure the smooth pressure relief of the explosion-proof valve 11c.

[0107] Further in the embodiment, referring to Figure 17 and Figure 18The rubber baffle assembly 60 includes a first rubber baffle plate 61 and a second rubber baffle plate 62, both of which extend longitudinally along the parallel direction X. The first rubber baffle plate 61 is arranged on the second end surface d2 and is provided with a bypass hole h for bypassing the explosion-proof valve 11c. The second rubber baffle plate 62 is assembled and connected with the first rubber baffle plate 61, and the two together form the pressure relief channel t. The bypass hole h connects the explosion-proof valve 11c and the pressure relief channel t.

[0108] Usually, a avoidance hole h is configured for each explosion-proof valve 11c. The explosion-proof valve 11c extends into the avoidance hole h, and even extends into the pressure relief channel t. The first rubber baffle plate 61 and the second end surface d2 can be fitted together to achieve a better rubber blocking effect.

[0109] The first rubber baffle plate 61 and the second rubber baffle plate 62 are substantially extended along the parallel direction X of the battery cell group 10 , and the two together form a pressure relief channel t, and the pressure relief channel t is open at both ends in the parallel direction X. The first rubber baffle plate 61 and the second rubber baffle plate 62 can be fastened, clamped, etc.

[0110] At this time, a pressure relief channel t is formed by the first rubber baffle plate 61 and the second rubber baffle plate 62 , which has a simple structure and is easy to implement.

[0111] Furthermore, refer to Figure 17 and Figure 18 One of the first rubber baffle plate 61 and the second rubber baffle plate 62 is provided with a slot g1, and the other is provided with a hook g2. The slot g1 and the hook g2 are both extended along the parallel direction X. The hook g2 can be inserted into the slot g1 along the parallel direction X and hooked with the slot g1.

[0112] Combination Figure 17 It is understood that a barb is formed inwardly at the notch of the slot g1 , and the hook g2 is inserted into the slot g1 and hooked with the barb to prevent the hook g2 from falling out of the slot g1 .

[0113] At this time, the first rubber baffle plate 61 and the second rubber baffle plate 62 are fixed by the matching of the clamping groove g1 and the clamping hook g2, so that the assembly is more convenient.

[0114] In some embodiments, the battery cell group 10 includes end plates 12 at both ends in the parallel direction X, and the first rubber baffle plate 61 is limitedly connected to the end plates 12. In other words, the first rubber baffle plate 61 and the battery cell group 10 are fixed by the end plates 12 at both ends, and there is no need to set a connection structure on the battery cell 11, which simplifies the structure of the battery cell 11 and reduces the manufacturing cost.

[0115] Specifically in the embodiment, refer to Figure 18 and Figure 19 One of the end plate 12 and the first baffle rubber plate 61 is provided with a limiting groove p1, one end of the limiting groove p1 in its own extension direction is open, and the other is provided with a limiting protrusion p2, which is inserted into the limiting groove p1 along the open end of the limiting groove p1 with a concave-convex fitting.

[0116] Preferably, the limiting groove p1 extends in a direction intersecting the side-by-side direction X (for example, the second direction Y in the above text), one end of which is open and the other end is closed in its extending direction. The limiting protrusion p2 extends in the same direction as the limiting groove p1, and can be inserted into the limiting groove p1 along the open end of the limiting groove p1 and is engaged with the limiting groove p1 in a concave-convex manner.

[0117] At this time, the end plate 12 and the first rubber baffle 61 are assembled and fixed through the cooperation of the limiting groove p1 and the limiting protrusion p2, which is easy to operate.

[0118] Furthermore, in combination with Figure 20 and Figure 19 it is understood that the limiting protrusion p2 includes a first part p21 and a second part p22 that are intersectingly arranged. The first part p21 penetrates through the notch of the limiting groove p1, and the second part p22 is located within the limiting groove p1. In the width direction of the limiting groove p1, the size of the second part p22 is larger than that of the first part p21.

[0119] Specifically, both the first part p21 and the second part p22 are longitudinally arranged along the extending direction of the limiting groove p1. The width direction of the limiting groove p1 is substantially perpendicular to its groove depth direction and extending direction in pairs. The first part p21 penetrates through the notch of the limiting groove p1 and is connected to the corresponding end plate 12 or the first rubber baffle 61. The second part p22 is located within the limiting groove p1.

[0120] Since the size of the second part p22 in the width direction of the limiting groove p1 is larger than that of the first part p21 in this width direction, the second part p22 and the first part p21 are substantially connected in a T shape or an L shape (corresponding to the cross-sectional shape of the limiting groove p1 being substantially T-shaped or L-shaped). In this way, the second part p22 cannot escape from the limiting groove p1 along the notch of the limiting groove p1, and the end plate 12 and the first rubber baffle 61 are more firmly engaged.

[0121] In some embodiments, referring to Figure 21 , the battery pack 100 includes a box body 70. The box body 70 includes a surrounding beam 71 and an intermediate beam 72. The surrounding beam 71 encloses an installation space k3. The intermediate beam 72 is disposed in the installation space and divides the installation space into a plurality of sub-spaces k31. A battery cell group 10 is disposed in each sub-space k31. The rubber baffle assembly 60 is located between the second end face d2 and the intermediate beam 72. The intermediate beam 72 forms an exhaust space k4 at an interval from the heat exchange plate 20 in the first direction Z. The pressure relief channel t is communicated with the exhaust space k4.

[0122] Specifically, preferably, two surrounding beams 71 are provided at intervals in the side-by-side direction X of the battery cell group 10. Both ends of the two surrounding beams 71 in the second direction Y are connected to the inner wall of the box body 70. The surrounding beam 71 and the inner wall of the box body 70 jointly enclose the installation space k3.

[0123] The middle beam 72 divides the placement space k3 to form multiple sub-spaces k31, so as to separate each battery cell group 10 and improve the structural stability of the battery pack 100. Preferably, both ends of the middle beam 72 are fixedly connected to the surrounding beam 71.

[0124] The heat exchange plate 20 exchanges heat with the battery cell group 10 in each sub-space k31 and covers the middle beam 72. An exhaust space k4 is formed between the middle beam 72 and the heat exchange plate 20, so that the flue gas discharged from the pressure relief channel t can be discharged outwards from the exhaust space k4, and the exhaust is smoother.

[0125] Furthermore, each surrounding beam 71 is arranged higher than the heat exchange surface S in the first direction Z. In practical applications, the thermal conductive adhesive is poured into the placement space k3 formed by the surrounding beam 71. The surrounding beam 71 is higher than the first heat exchange surface S, which can ensure that the thermal conductive adhesive will not overflow the area where the battery cell group 10 is located, avoid waste of the thermal conductive adhesive, and can further reduce the amount of the thermal conductive adhesive used.

[0126] In addition, the electric device provided by the embodiment of the present application includes the battery pack 100 described in any of the above embodiments, and the battery pack 100 is used to provide electric energy. The electric device has the beneficial effects described in any of the above embodiments.

[0127] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0128] The above embodiments only represent several implementation manners of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A battery pack (100), characterized in that: include: A battery cell group (10) comprises a plurality of battery cells (11) arranged side by side, all of the battery cells (11) are formed with a heat exchange surface (S), and each of the battery cells (11) comprises a pole (11a) located on the heat exchange surface (S); the heat exchange surface (S) is provided with a groove (11b) along a first direction (Z) intersecting with a side-by-side direction (X) of the battery cell group (10), and the pole (11a) is located in the groove (11b); A heat exchange plate (20) is spaced relative to the heat exchange surface (S) in the first direction (Z) to form a glue-filled space (k1); A collection component (30) is arranged in the groove (11b), comprising a collection terminal (32) and a collection circuit board (31), wherein the collection circuit board (31) is arranged to extend along the parallel direction (X), and the collection circuit board (31) is connected to the pole (11a) via the collection terminal (32) to collect status information of the battery cell group (10); The isolation component (40) is arranged in the groove (11b), and comprises a partition (41) and a rubber blocking member (42); the collection component (30) is supported by the partition (41); the partition (41) is insulated and arranged between the collection component (30) and the heat exchange surface (S); the rubber blocking member (42) cooperates with the partition (41) to block the heat-conducting glue in the glue-filling space (k1) from flowing to the collection circuit board (31).

2. The battery pack (100) according to claim 1, characterized in that: The rubber blocking member (42) comprises a rubber blocking strip (42b) arranged between the partition (41) and the heat exchange plate (20), wherein the rubber blocking strip (42b) protrudes from the heat exchange surface (S) in the first direction (Z) and abuts against the heat exchange plate (20); two rubber blocking strips (42b) are arranged at intervals along the second direction (Y) to form a rubber blocking space (k2) together with the heat exchange plate (20), and at least a portion of the acquisition circuit board (31) is located in the rubber blocking space (k2); The first direction (Z), the second direction (Y) and the parallel direction (X) intersect each other and are not coplanar.

3. The battery pack (100) according to claim 2, characterized in that: The acquisition circuit board (31) has a first end surface (d1) arranged facing the heat exchange plate (20), the rubber blocking strip (42b) is fixed to two side edges of the first end surface (d1) along the second direction (Y), and the rubber blocking strip (42b), the first end surface (d1) and the heat exchange plate (20) together enclose the rubber blocking space (k2); and / or, The rubber blocking strip (42b) is constructed as a deformable member that can be compressed and deformed in the first direction (Z).

4. The battery pack (100) according to claim 3, characterized in that: Two partition bars (41b) are protrudingly provided on one side of the partition plate (41) away from the heat exchange surface (S); the two partition bars (41b) are spaced apart along the second direction (Y); the collection circuit board (31) is located between the two partition bars (41b); the rubber blocking strip (42b) is arranged in close contact with the partition bars (41b); and each of the partition bars (41b) is provided with a notch (b1) for the collection terminal (32) to pass through.

5. The battery pack (100) according to claim 4, characterized in that: In the first direction (Z), the rubber blocking strip (42b) is arranged higher than the spacer strip (41b).

6. The battery pack (100) according to any one of claims 1 to 5, characterized in that: The battery cell group (10) comprises an explosion-proof valve (11c), and the explosion-proof valve (11c) is arranged on a second end surface (d2) where the battery cell group (10) intersects with the heat exchange surface (S); The battery pack (100) comprises a rubber stopper assembly (60), the rubber stopper assembly (60) forms a pressure relief channel (t), and the explosion-proof valve (11c) is connected to the pressure relief channel (t).

7. The battery pack (100) according to claim 6, characterized in that: The rubber baffle assembly (60) comprises a first rubber baffle plate (61) and a second rubber baffle plate (62), both of which extend longitudinally along the parallel direction (X); the first rubber baffle plate (61) is arranged on the second end surface (d2) and is provided with an avoidance hole (h) for avoiding the explosion-proof valve (11c); the second rubber baffle plate (62) is assembled and connected to the first rubber baffle plate (61); the two together form the pressure relief channel (t); the avoidance hole (h) connects the explosion-proof valve (11c) and the pressure relief channel (t).

8. The battery pack (100) according to claim 7, characterized in that: One of the first rubber baffle plate (61) and the second rubber baffle plate (62) is provided with a slot (g1), and the other is provided with a hook (g2), the slot (g1) and the hook (g2) are both extended along the parallel direction (X), and the hook (g2) can be inserted into the slot (g1) along the parallel direction (X) and hooked with the slot (g1); and / or, The battery cell group (10) comprises end plates (12) located at both ends in the parallel direction (X), and the first rubber baffle plate (61) is position-limitingly connected to the end plates (12).

9. The battery pack (100) according to claim 8, characterized in that: One of the end plate (12) and the first rubber baffle plate (61) is provided with a limiting groove (p1), one end of the limiting groove (p1) in its own extension direction is open, and the other is provided with a limiting protrusion (p2), and the limiting protrusion (p2) is inserted into the limiting groove (p1) along the open end of the limiting groove (p1) in a concave-convex matching manner; The limiting protrusion (p2) comprises a first part (p21) and a second part (p22) which are arranged to intersect each other, wherein the first part (p21) passes through the notch of the limiting groove (p1), and the second part (p22) is located in the limiting groove (p1); in the width direction of the limiting groove (p1), the size of the second part (p22) is larger than the size of the first part (p21).

10. An electrical device, characterized in that: Comprising a battery pack (100) as claimed in any one of claims 1 to 9, the battery pack (100) is used to provide electrical energy.

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