Battery and electric device

Abstract

The invention relates to the technical field of electric energy storage, and particularly discloses a battery and a power utilization device. The plurality of partition plates are positioned in the battery box body, and the space in the battery box body is divided into at least two battery cabins which are sequentially arranged from top to bottom by the partition plates; and a battery module and a heat exchange plate for exchanging heat for the battery module are arranged in each battery bin. The battery and the electric device provided by the invention can effectively solve the problem that the existing dual-module battery is easy to thermally runaway and spread.

Description

Technical Field

[0001] The present invention relates to the technical field of electric energy storage, and in particular to a battery and an electric device. Background Art

[0002] With the vigorous development of the new energy industry, the country has put forward higher requirements for the energy density and group efficiency of battery systems. As the energy storage and power output device of electric vehicles, the power battery system is the power source of electric vehicles and the guarantee of their endurance. Due to the spatial structure of the entire vehicle, there are certain restrictions on the height of the battery pack. There is a relatively high space under the rear passenger seat. To ensure the endurance of electric vehicles, multiple layers of battery modules are arranged here. Different battery modules need to be connected through brackets. The brackets must ensure the installation and safety of the modules while considering the utilization of space. In addition, the battery modules will generate heat during operation. After placing multiple battery modules in the battery, the internal heat will be severe, which is prone to thermal runaway and heat spread.

[0003] Therefore, there is a need to improve the existing dual-module batteries to solve their installation problems and the problems of thermal runaway and heat spread. Summary of the Invention

[0004] An object of the present invention is to provide a battery and an electrical device that can effectively solve the problem of thermal runaway and heat spread in existing dual-module batteries.

[0005] To achieve the above object, the present invention provides a battery comprising:

[0006] Battery box;

[0007] a plurality of partition plates, each of which is located in the battery box and divides the space in the battery box into at least two battery compartments arranged sequentially from top to bottom;

[0008] Wherein, each of the battery compartments is provided with a battery module and a heat exchange plate for exchanging heat with the battery module.

[0009] Optionally, the partition plate includes two second supporting bosses for supporting the battery module and arranged opposite to each other, and an intermediate plate body for placing the heat exchange plate is connected between the two second supporting bosses;

[0010] The two second supporting bosses are each connected to an extension portion on one side away from each other, and the battery box is provided with a plurality of supporting members for supporting the extension portions.

[0011] Optionally, the support member protrudes from the inner wall of the battery box toward the space inside the battery box.

[0012] Optionally, a cavity is provided inside the extension portion, and a bushing is fixed in the cavity of the extension portion;

[0013] The battery further includes a first bolt;

[0014] The first bolt passes through the bushing in the extension portion and is threadedly connected to the support member.

[0015] Optionally, the second supporting boss is a hollow structure, and a bushing is fixed in the hollow structure of the second supporting boss.

[0016] Optional,

[0017] The battery further includes a second bolt;

[0018] The battery module includes a plurality of battery cells and a battery cell bracket for fixing each of the battery cells;

[0019] The second bolt passes through the cell bracket of the battery module corresponding to the partition plate and is threadedly connected to the bushing in the second supporting boss.

[0020] Optionally, the intermediate plate body is provided with a plurality of positioning pins, and the heat exchange plate is provided with positioning holes for the positioning pins to pass through, so that the heat exchange plate is fixed on the intermediate plate body.

[0021] Optionally, a plurality of limiting strips are provided on the surface of the heat exchange plate close to the corresponding battery module, and a thermal conductive adhesive that fits the battery module is provided between two adjacent limiting strips.

[0022] Optionally, the battery box includes a side frame, a bottom plate welded to one end of the side frame, and a box cover fastened to the other end of the side frame by locking bolts;

[0023] Wherein, a first supporting boss is provided on a side of the side frame close to the battery module, and the first supporting boss is used to support the battery module close to the bottom of the battery box;

[0024] A side of the side frame away from the battery module is connected to a lifting boss, wherein the lifting boss is provided with a lifting hole;

[0025] Bushings are provided in both the first supporting boss and the lifting boss.

[0026] Optionally, the number of the partition plate is one, which divides the space in the battery box into an upper battery compartment and a lower battery compartment;

[0027] A BMS module is fixedly mounted on the inner wall of the upper battery compartment;

[0028] The thickness dimension b of the position where the BMS module is installed in the upper battery compartment and the thickness dimension a of the lower battery compartment satisfy: a>b.

[0029] Optionally, a triangular cavity is provided at the end of the side frame close to the box cover for the locking bolt to extend into, wherein the triangular cavity gradually decreases in size towards the bottom plate.

[0030] On the other hand, an electrical device is provided, comprising any one of the above-mentioned batteries.

[0031] The beneficial effects of the present invention are: providing a battery and an electrical device. On the one hand, each battery module is correspondingly provided with a heat exchange plate, which can dissipate heat from the corresponding battery module to prevent the battery module from being overheated and causing thermal runaway; on the other hand, the partition plate separates two adjacent battery modules to prevent the thermal runaway of a battery module from spreading to other battery modules.

[0032] Therefore, the battery provided by the present invention can effectively solve the problems of thermal runaway and heat spread in existing dual-module batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 A schematic structural diagram of a battery provided in an embodiment;

[0035] Figure 2 An exploded schematic diagram of a battery provided in an embodiment;

[0036] Figure 3 An exploded schematic diagram of a battery box and a second battery module provided in an embodiment;

[0037] Figure 4 A schematic structural diagram of a battery module and a separator provided in an embodiment;

[0038] Figure 5 A schematic structural diagram of a battery provided in an embodiment with two battery modules omitted;

[0039] Figure 6 A schematic cross-sectional view of a battery provided in an embodiment;

[0040] Figure 7 A schematic structural diagram of the partition plate and the second heat exchange plate provided in the embodiment;

[0041] Figure 8 A schematic diagram of the positions of the bushings provided in the embodiment;

[0042] Figure 9 A schematic diagram of the location of the BMS module provided in the embodiment.

[0043] In the picture:

[0044] 1. Battery case; 101. Side frame; 1011. Triangular cavity; 102. Bottom plate; 103. Locking bolt; 104. Case cover; 105. Battery compartment; 106. First support boss; 107. Support member; 108. Lifting boss; 1081. Lifting hole; 109. Inclined support portion; 110. Sealing gasket; 111. Mounting boss;

[0045] 2. Separator; 201. Second supporting boss; 202. Intermediate plate; 2021. Positioning pin; 203. Extension; 204. Reinforcement rib;

[0046] 3a, first battery module; 3b, second battery module; 301, battery cell; 302, horizontal copper busbar; 303, vertical copper busbar; 304, battery cell bracket;

[0047] 4a, first heat exchange plate; 4b, second heat exchange plate; 401, positioning hole;

[0048] 5. Bushing;

[0049] 6. Limit strip;

[0050] 7. Thermal conductive adhesive;

[0051] 8. Inlet and outlet pipe components;

[0052] 9. Quick plug;

[0053] 10. Temperature sensing component;

[0054] 11. Thermal insulation sheet;

[0055] 12. First bolt;

[0056] 13. Second bolt;

[0057] 14. Third bolt;

[0058] 15. Support foam;

[0059] 16. BMS module. DETAILED DESCRIPTION

[0060] In order to make the purposes, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0061] In the description of the present invention, it should be understood that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a centrally located component. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be a centrally located component.

[0062] In addition, terms such as "long", "short", "inside", and "outside" indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention. They do not indicate or imply that the device or component referred to must have this specific orientation or operate in a specific orientation structure, and should not be understood as a limitation of the present invention.

[0063] The present invention will be described in detail below with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional changes made by those skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0064] The present invention provides a battery and an electrical device suitable for application scenarios of storing electrical energy, which can effectively solve the problems of thermal runaway and heat spread in existing dual-module batteries.

[0065] The power-consuming device can be a new energy vehicle or a DC power supply system, etc., which includes a battery. Figures 1 to 4 In this embodiment, the battery includes a battery case 1 and several partitions 2. The battery case 1 includes a side frame 101, a bottom plate 102 welded to one end of the side frame 101, and a cover 104 fastened to the other end of the side frame 101 via locking bolts 103 and rivet nuts. Optionally, a sealing gasket 110 is provided between the cover 104 and the side frame 101.

[0066] Each of the partition plates 2 is located in the battery box 1, dividing the space in the battery box 1 into at least two battery compartments 105 arranged in sequence from top to bottom; wherein each of the battery compartments 105 is provided with a battery module and a heat exchange plate for exchanging heat with the battery module.

[0067] Optionally, each battery module includes a cell holder 304 and a plurality of cell units 301 mounted and fixed on the cell holder 304 . The cell units 301 in the same battery module are electrically connected via a transverse copper bus 302 ; and the upper and lower battery modules are electrically connected via a longitudinal copper bus 303 .

[0068] In the battery provided in this embodiment, on the one hand, each battery module is provided with a corresponding heat exchange plate, which can dissipate heat from the corresponding battery module to prevent the battery module from overheating and causing thermal runaway; on the other hand, the partition plate 2 separates two adjacent battery modules to prevent the thermal runaway of a battery module from spreading to other battery modules.

[0069] Therefore, the battery provided by the present invention can effectively solve the problems of thermal runaway and heat spread in existing dual-module batteries.

[0070] Optionally, the battery also includes an inlet and outlet pipe assembly 8. Both heat exchange plates are connected to the inlet and outlet pipe assembly 8 via a quick plug 9 to facilitate quick installation and removal. Furthermore, the inlet and outlet pipe assembly 8 is equipped with a temperature sensing component 10 for sensing the inlet and / or outlet temperature of the liquid for temperature monitoring.

[0071] Optionally, the pole surfaces of the two battery modules are both provided with a thermal insulation sheet 11. For example, the thermal insulation sheet 11 can be a mica board, a ceramic sheet or a quartz sheet, etc., which not only plays an insulating role to prevent the battery module from being electrically connected to the battery box 1 or the partition plate 2, but also has good thermal insulation performance, effectively suppressing the heat spread after thermal runaway.

[0072] The number of partition plates 2 can be two, three, four...n, and each of the partition plates 2 is spaced apart from each other from top to bottom. Accordingly, the number of battery compartments 105 and battery modules is three, four, five...(n+1). For the convenience of explanation, in the following examples, the number of partition plates 2 is one, and accordingly, the number of battery compartments 105 and battery modules is two. Furthermore, the lower battery module is referred to as the "first battery module 3a", and the upper battery module is referred to as the "second battery module 3b". The heat exchange plate corresponding to the first battery module 3a is referred to as the "first heat exchange plate 4a", and the heat exchange plate corresponding to the second battery module 3b is referred to as the "second heat exchange plate 4b".

[0073] See also Figure 5 and Figure 6 Optionally, two first support bosses 106 are provided at intervals on the lower inner end of the side frame 101 for supporting the first battery module 3a. Several support members 107 for supporting the partition plate 2 extend from the middle of the inner side of the side frame 101 toward the space within the battery box 1.

[0074] See also Figure 7 The partition plate 2 includes two second supporting bosses 201 arranged opposite to each other for supporting the second battery module 3b, and an intermediate plate body 202 for placing the second heat exchange plate 4b is connected between the two second supporting bosses 201; the two second supporting bosses 201 are each connected to an extension portion 203 extending above the support member 107 on one side away from each other.

[0075] A lifting boss 108 is connected to the side of the side frame 101 facing away from the battery module. This boss 108 is provided with several lifting holes 1081 for easy lifting. In this embodiment, four groups of two lifting holes 1081 are provided. Optionally, an inclined support 109 is provided between the lifting boss 108 and the side frame 101 to create a more stable triangular structure and further enhance the connection reliability between the lifting boss 108 and the side frame 101.

[0076] See also Figure 8 In this embodiment, the side frame 101 and the partition plate 2 are both hollow profile structures with a plurality of reinforcing ribs. The second supporting boss 201, the extension 203, the first supporting boss 106, and the hanging boss 108 are all internally provided with a cavity, and the bushing 5 is disposed in the cavity.

[0077] Specifically, the hollow profile cavity facilitates lightweight design, while the use of bushing 5 locally increases structural strength to ensure connection reliability. Therefore, the combination of the hollow profile structure and bushing 5 maximizes structural lightweighting while maintaining the required structural strength, thereby increasing energy density.

[0078] When assembling the battery, the steps are as follows:

[0079] S101: Install the first heat exchange plate 4a and the first battery module 3a;

[0080] Specifically, the first heat exchange plate 4a is first placed between the two first support bosses 106; the first battery module 3a is then placed on the first support bosses 106; then, the third bolt 14 is passed through the cell holder 301 of the first battery module 3a and threadedly connected to the bushing 5 fixed in the first support bosses 106, thereby fixing the first battery module 3a on the first support bosses 106;

[0081] S102: Install and fix the partition plate 2;

[0082] Specifically, after the first bolt 12 passes through the extension portion 203 and the bushing 5 in the extension portion 203, it is threadedly connected to the support member 107 to complete the installation and fixation of the partition plate 2;

[0083] S103: placing the second heat exchange plate 4b on the middle plate body 202;

[0084] In this embodiment, the intermediate plate 202 is provided with a plurality of positioning pins 2021. For example, a positioning pin 2021 is provided at each of the four corners of the intermediate plate 202. The heat exchange plate is provided with positioning holes 401 for the positioning pins 2021 to pass through. The positioning pins 2021 are inserted into the corresponding positioning holes 401 to complete the positioning operation of the second heat exchange plate 4b.

[0085] S104: Install and fix the second battery module 3b;

[0086] Specifically, after the second bolt 13 passes through the cell bracket 301 of the second battery module 3b, it is threadedly connected to the bushing 5 in the second supporting boss 201 to complete the installation and fixation of the second battery module 3b;

[0087] S105: Install the box cover 104;

[0088] Specifically, a triangular cavity 1011 is provided at the end of the side frame 101 near the box cover 104 for the locking bolt 103 to extend into. A rivet nut is provided in the triangular cavity 1011 to cooperate with the locking bolt 103. The rivet nut can be quickly installed, and the connection process is simple and reliable. When rapid mass production or assembly is required, this nut can significantly improve work efficiency.

[0089] Generally, the rivet space for placing the rivet nut is usually a rectangular space. In this embodiment, the rivet space for placing the rivet nut is a triangular cavity 1011, wherein the triangular cavity 1011 gradually decreases in the direction approaching the bottom plate 102. The box cover 104 can be fixed to the side frame 101 by tightening the bolts 103 and the rivet nuts.

[0090] The triangular cavity 1011 not only provides sufficient accommodation space for the locking bolt 103, but also enables the top surface of the side frame 101 to have a larger sealing surface area, thereby ensuring the sealing between the side frame 101 and the box cover 104. Moreover, compared with the conventional rectangular design, it saves vehicle space and box materials, thereby reducing weight and lowering costs.

[0091] In this embodiment, see Figure 7 Support foam 15 is provided between the bottom plate 102 and the first heat exchange plate 4a, and between the middle plate 202 and the second heat exchange plate 4b, which can play a supporting and heat insulating role.

[0092] Optionally, the heat exchange plate is provided with a plurality of limiting strips 6 on the surface near the corresponding battery module. Thermally conductive adhesive 7 is provided between adjacent limiting strips 6 to adhere to the battery module. The thermally conductive adhesive 7 is used to fill the air gap between the heat exchange plate and the bottom of the battery module to ensure heat exchange between the heat exchange plate and the battery module. The limiting strips 6 limit the thickness and flow direction of the thermally conductive adhesive 7 to ensure that the thermally conductive adhesive 7 does not overflow on both sides of the battery module.

[0093] See also Figure 8 In this embodiment, the partition plate 2 is one piece, which divides the space in the battery box 1 into an upper battery compartment and a lower battery compartment; a BMS module 16 is fixedly installed on the inner wall of the upper battery compartment; the thickness dimension b of the position where the BMS module 16 is installed in the upper battery compartment and the thickness dimension a of the lower battery compartment satisfy: a>b.

[0094] It should be noted that the thickness dimension b of the upper battery compartment is designed to be relatively small, which can make room for installing the BMS module 16. Moreover, the lower part of the side frame 101 needs to bear the weight of two battery modules, and the upper part of the side frame 101 only needs to bear the weight of one battery module. Therefore, the structure of being narrow at the top and wide at the bottom is conducive to minimizing weight and increasing energy density while ensuring reasonable structural strength.

[0095] Furthermore, the wall thickness of the entire upper battery compartment is uniform and is equal to b, and the wall thickness of the entire lower battery compartment is uniform and is equal to a, where a>b. Alternatively, the wall thickness of the entire upper battery compartment is only b where the BMS module 16 is installed, and the wall thickness of all other locations is a; or, in some other embodiments, the wall thickness of the upper and lower battery compartments is equal, that is, the thickness b is equal to the thickness a, but the present invention is not limited to this.

[0096] Further, see Figure 9 A mounting boss 111 is welded and fixed inside the upper battery compartment, and the BMS module 16 is mounted on the mounting boss 111 .

[0097] In summary, the battery and power-consuming device provided in this embodiment have the following advantages:

[0098] ① Each battery module is equipped with a heat exchange plate, which can dissipate heat from the corresponding battery module to prevent the battery module from overheating and causing thermal runaway;

[0099] ② The separator 2 separates two adjacent battery modules to provide isolation protection to prevent thermal runaway of one battery module from spreading to other battery modules;

[0100] ③ The hollow profile structure is combined with the bushing 5 design to maximize the lightweight structure while ensuring the structural strength required by the design, thereby improving the energy density.

[0101] It should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation method can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0102] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A battery, characterized in that: include: Battery box (1); a plurality of partition plates (2), each of the partition plates (2) being located in the battery box (1) and dividing the space in the battery box (1) into at least two battery compartments (105) arranged sequentially from top to bottom; Each of the battery compartments (105) is provided with a battery module and a heat exchange plate for exchanging heat with the battery module.

2. The battery according to claim 1, characterized in that The partition plate (2) is mounted and fixed on the battery box (1).

3. The battery according to claim 2, characterized in that The partition plate (2) comprises two second supporting bosses (201) for supporting the battery module and arranged opposite to each other, and an intermediate plate body (202) for placing a heat exchange plate is connected between the two second supporting bosses (201); The two second supporting bosses (201) are each connected to an extension portion (203) on one side away from each other, and the battery box (1) is provided with a plurality of support members (107) for supporting the extension portions (203); The support member (107) protrudes from the inner wall of the battery box (1) toward the space inside the battery box (1).

4. The battery according to claim 3, characterized in that A cavity (2031) is provided inside the extension portion (203), and a bushing (5) is fixedly provided in the cavity of the extension portion; The battery further includes a first bolt (12); After the first bolt (12) passes through the bushing (5) in the extension portion (203), it is threadedly connected to the support member (107).

5. The battery according to claim 3, characterized in that A cavity is provided inside the second supporting boss (201), and a bushing (5) is fixedly provided in the cavity of the second supporting boss (201); The battery further comprises a second bolt (13); The battery module comprises a plurality of battery cells (301) and a battery cell support (304) for fixing each of the battery cells (301); After the second bolt (13) passes through the battery cell bracket (304) of the battery module corresponding to the partition plate (2), it is threadedly connected to the bushing (5) in the second supporting boss (201).

6. The battery according to claim 3, characterized in that The intermediate plate body (202) is provided with a plurality of positioning pins (2021), and the heat exchange plate is provided with positioning holes (401) for the positioning pins (2021) to pass through, so that the heat exchange plate is fixed on the intermediate plate body (202).

7. The battery according to claim 1, characterized in that The battery box (1) comprises a side frame (101), a bottom plate (102) welded and fixed to one end of the side frame (101), and a box cover (104) fastened and mounted to the other end of the side frame (101) via a locking bolt (103); Wherein, a first supporting boss (106) is provided on a side of the side frame (101) close to the battery module, and the first supporting boss (106) is used to support the battery module close to the bottom of the battery box (1); A side of the side frame (101) away from the battery module is connected to a hanging boss (108), wherein the hanging boss (108) is provided with a hanging hole (1081); Bushings (5) are provided in both the first supporting boss (106) and the hanging boss (108).

8. The battery according to claim 7, characterized in that The number of the partition plate (2) is one, which divides the space in the battery box (1) into an upper battery compartment and a lower battery compartment; A BMS module (16) is fixedly mounted on the inner wall of the upper battery compartment; The thickness dimension b of the position where the BMS module (16) is installed in the upper battery compartment and the thickness dimension a of the lower battery compartment satisfy the following relationship: a>b.

9. The battery according to claim 8, characterized in that The end of the side frame (101) close to the box cover (104) is provided with a triangular cavity (1011) for the locking bolt (103) to extend into, wherein the triangular cavity (1011) gradually decreases in size towards the bottom plate (102).

10. An electrical device, characterized in that: A battery comprising the battery according to any one of claims 1 to 9.

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